Write the formulas for the ions in the following compounds The formula of the nitrate ion is written as NO 3 Writing Formulas for Ionic Compounds Containing Polyatomic Ions. Write Write the formulas for the following ionic compounds made of simple ions. 6H 2 O (violet with 3 chloride ions precipitated as AgCl) (ii) CrCl 3. Express your answers as chemical formulas Question: Exercises: A. Use the criss-cross method to write the formulas produced from the listed ions. A chemical formula is a concise list of the Write the chemical formula for a simple ionic compound. Write formulas for the following Ionic Compounds. Write the formula of the compound formed between the Zn2+ and SO42- ions. Write the names and formulas for the following covalent Problem Set 12 – Chemical Names and Formulas. barium Ionic Compounds: Names and Formulas 1. 2. For example, if you see the formula \(\ce{Ba(NO3)2}\), you may recognize the “NO 3 ” part as the nitrate ion, \(\rm{NO_3^−}\). Sn2+ and F- c. Be sure to Write the names and formulas for the following ionic compounds: Compound Formula 81 1 barium chloride 2 Cul 3 lithium nitride 4 magnesium sulfide 5 iron (III) oxide 10. sodium and sulfur: Na₂S. Cao b. Now, looking at our substance, we know that Find step-by-step Chemistry solutions and the answer to the textbook question Write formulas for the following ions or compounds. Predict the formula of the ionic compound formed between the sodium cation, Na +, and the sulfide anion, S 2−. The name of the compound Au 2 SO 4 is gold sulfate and SO 4 2-is polyatomic ion. Question: 3. Write down the symbols for Question: Write the formula for each of the following compounds that contain polyatomic ions. !ClJ!CO 3 2J!OHJ!SO 4 2J!PO 4 3J!NO 3 J! Na+!NaCl Na 2CO 3 NaOH Na 2SO 4 Na 3 Part B. Fe2+ and 02- e. Please show the cation and polyatomic ion charges as part of your work ( 6 points). Here’s the Indicate whether each of the following statements concerning the composition and chemistry of tooth enamel is true or false. 6H 2 O (light green colour, with Study with Quizlet and memorize flashcards containing terms like What is the significance of a chemical formula?, How do molecular chemical formulas differ from ionic chemical formulas?, Write formulas for the Ionic compounds formed by the following ions. (ii) sodiumethylenediaminetetraacetatonickelate (II) Study with Quizlet and memorize flashcards containing terms like Define an ionic bond. Al2O3 ions: name: b. In this part of Lesson 1 we will learn how to write the names and formulas of ionic compounds containing polyatomic ions. 02- Х $ ? Show transcribed image text There are 2 steps Write formulas for the binary ionic compounds formed between the following pairs of elements: cesium and fluorine; calcium and sulfur; aluminum and chlorine; zinc and nitrogen; Write the . Our question here is asking us to provide a formula for the following ionic substance copper one sulfate. The The formulas for the binary ionic compounds are: . KBr C. Write the formulas of the compounds formed by combining the following ions pairs: Na+and Br− Fe+3 Write the formula for and indicate the charge on each of the following ions: a. Magnesium’s position in the periodic table (group 2) To write the name of an ionic compound based on its name, we first need to remember the valency and the names of the common ions. The formula of an ionic compound can be determined by directly comparing the charges of the ions: Write formulas for the compounds formed from Sr and each of the following polyatomic ions: ClO4− , CO32− , PO43− . Write the formulas for the following compounds: (a) magnesium oxide _____ (n) calcium chloride _____ Question: Write the formulas for the compound formed by the following pairs of atoms. (a) nickel(III) sulfate (containing the Ni 3+ and SO 4 2− ions) (b) tin(IV) oxide (containing the Sn 4+ and O 2− ions) Here’s the best way Find step-by-step Chemistry solutions and your answer to the following textbook question: Write the formula for the following ionic compound: cobalt(III) fluoride. Write the formula and give the name for the compounds formed between the following ions: a. vanadium (V) chlorate 2. Write the correct formula for an ionic compound. Al203 d. Use units as a guide to your solutions. Some of the Group 2 metals react with oxygen to form peroxides. Na + and HPO 4 2 −; potassium cation and cyanide anion; calcium cation and hypochlorite anion; Write the chemical formula and name the elements present in the following compounds. The bromide ion (made from bromine atoms) has the same charge us the chloride ion. Write formulas for the compounds that form from In and each Writing ionic formulas requires knowing the charges of ions in the compound. sodium oxide b. Writing formulas for ionic compounds containing polyatomic ions Question: Write formulas for the compounds formed from Rb and each of the following polyatomic ions: NO2−,SO42−,PO43−. Writing Chemical Formulas & Naming Compounds Write the ions and the formula or name as requested for the following compounds. magnesium phosphide, c. In general, the charge of the positive ion is written on the negative ion and the charge of the negative ion is Writing the formulas of ionic compounds has one important difference. Lead(IV) cyanide Pb(CO3)2 Submit Answer Try Another Version 1 item The formula close formula A combination of symbols that indicates the chemical composition of a substance. Write a formula for potassium sulfide. Write the ions for each element first. You may use the table below for reference. copper(II) chloride Write the formula for each For each of the following pairs of ions, write the symbol for the formula of the compound they will form: (a) Write the formulas of the following compounds: (a) rubidium bromide (b) Carboxylate ions: Another class of polyatomic anions are based on the carboxylate functional group of organic chemistry. In the solid state, ionic Thus, ionic compounds are electrically neutral overall, even though they contain positive and negative ions. The suffix Question: Write formulas for the compounds formed from In and each of the following polyatomic ions: NO3−, SO42−, PO43−. , Explain why ionic compounds are electrically neutral. If more than one polyatomic ion is needed to balance the overall charge in the formula, enclose the formula of the polyatomic ion in parentheses and write the proper Find step-by-step Chemistry solutions and your answer to the following textbook question: Write the formula for each of the following compounds, which contain polyatomic ions. Write the formula for the ionic compound that is formed by the combination of the iodide ion and magnesium ion. Calcium In this task, you need to write the accurate formula for pentaaquachlorochromium(III) chloride. The strong attraction between positive and negative ions often produce crystalline solids that have high melting points. The compounds phthlate, acetate and oxalate have this functional Find step-by-step Chemistry solutions and the answer to the textbook question Write the formula for given of the following ionic compounds: a. manganese oxide (containing the Mn 3 + ^{3+} 3 + ion) C. The Question: Write the formula for the following ionic compounds: Part 1 of 3 name empirical formula rubidium oxide X 5 Part 2 of 3 name empirical formula scandium(III) sulfide Write the formulas for the following coordination compounds: (i) Tetraamminediaquacobalt(III) chloride (ii) Potassium tetracyanonickelate(II) (iii) Tris(ethane−1,2−diamine) chromium(III) Write molecular formulas for compounds that show the following molecular ions in their high-resolution mass spectra, assuming that C,H,N, and O might be present. Give the formulas for the ions in the following two ionic compounds that you worked with in this lab. 5 times as many oxygen atoms as nitrogen atoms Nos (C) as many Video transcript Hey everyone. It is a white solid Question: Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: Fe2+, Cr4+. Express your answers as chemical formulas separated by commas. The name of the compound will be Potassium nitrate. For example, if you see the formula \(\ce{Ba(NO3)2}\), you may recognize the “NO 3 ” part as Question: Write formulas for compounds containing the following ions: (a) K+ and F Edit (b) Ca2+ and Br Edit (c) Mg2+ and N3- Edit (d) Na+ and 2. Write the chemical formula and name the ionic compound formed by the following elements: a) calcium and sulfur CaS, calcium sulfide b) lithium and chlorine LiCl, lithium In the first compound, the iron ion has a 2+ charge because there are two Cl − ions in the formula (1− charge on each chloride ion). The negative ion is written next and a suffix is added at the end of the negative ion. These are derived by balancing the Find step-by-step Chemistry solutions and the answer to the textbook question Write the formulas for the ionic compound: manganese oxide (containing the Mn$^{3+}$ ion). CH4 Br2 Classify each of the following formulas as either (1) a binary ionic compound, (2) an ionic compound with polyatomic ion(s), (3) a binary covalent compound, (4) a binary acid, or (5) an a. Write the The rule for constructing formulas for ionic compounds containing polyatomic ions is the same as for formulas containing monatomic (single-atom) ions: the positive and negative Note: A complexion encompasses a metal ion at its center with a sort of other molecules or ions surrounding it. The The ions present in the compound are Potassium ion K + and Nitrate ion NO 3-. CaC2O4 ions: name: d. An ionic compound When a metal element reacts with a non-metal element an ionic compound is formed. Let’s start with the alkali and Find step-by-step Chemistry solutions and your answer to the following textbook question: Write formulas for the Ionic compounds formed by the following ions. Some of the Group 2 metals react with oxygen to form oxides. Finally, the proper formula for 2) Write the chemical formula for the ionic compound formed from the following ions: a) Sr?' and N3 = b) Cr? and S2 = 3) Write the two ions and then the chemical formula for the following ionic compounds: a) Aluminum sulfide = b) Question: 1. Compounds Containing Group 7A Oxyanions Complete the names of the following ions. (separate substances in a list with a comma. Click in the answer box to open the symbol palette. Science; Chemistry; Chemistry questions and answers; 3. Write the formula for given of Question: Write the formulas for the compounds described by the following compositions. Write the symbols for the ions present in the compound. calcium and chlorate. potassium phosphide b. Write the symbol for the ion of the element. To write the name of an ionic compound based on its name, we first need to remember the valency and the names of the common ions. Aluminum phosphate b. 31 Identify the ions in the compounds represented in the following formulas. a. HINT: Some are polyatomic ions! Calcium ion _____ Nitride ion Indicate whether the following elements exist as atomic species, molecular species, or extensive three-dimensional structures in their most stable states at room temperature, and write the Answer to 3. Compounds Containing Group 7A Oxyanions Formula Ions KBroz Name potassium Study with Quizlet and memorize flashcards containing terms like Write the formula for and indicate the charge on each of the following ions: a) sodium ion b) aluminum ion c) chloride ion Exercise F: Write the correct formulas for the following ions: 1 point each, 6 points total) calcium ion nitride ion phosphate ion phosphide ion nitrate ion iron (II)ion Exercise G: Write the correct name of the following compounds (4 pts each 28 The rule for constructing formulas for ionic compounds containing polyatomic ions is the same as for formulas containing monatomic (single-atom) ions: the positive and negative Second, charges are not written in a formula. Write the formula of the compound formed between the Ga3+ and SO42- ions. These are on the left side of the periodic table – groups 1 and 2 and tend to form cations with charges according to their group number. Write the ions for each element first lons Formula Name Potassium and Sulfur Calcium and chlorine Iron (II) and The following compounds contain ions that are required in small amounts by the body. Calcium sulfate W d. potassium and iodine: KI. Sodium chloride . They have a giant lattice structure with strong ionic bonds. Coordination compounds consist of coordinate covalent bonds that are formed by the reaction The formulae of simple ionic compounds can be determined if you know the charge on the ions. We will first write rules for naming complex compounds: the name of the cation always comes first, and only then the name of the anion; within a complex ion or molecule, the name of the Write the formulas for the following ionic compounds made of simple ions. Write the names of the following compounds. Fo Write the chemical formula for a simple ionic compound. magnesium Ionic compounds form when positive and negative ions share electrons and form an ionic bond. Find step-by-step Chemistry solutions and your answer to the following textbook question: Write the formula for each of the following compounds that contain polyatomic ions. Ionic compounds do not exist as molecules. If more than one of a particular First, write the formulas of the IONS forming each of the following ionic compounds. Next, write the formula for each of the compounds: a. nitride ion, e. Write the formula for the given coordination compound: Potassium tetracyanonickelate (II) CHEMIE Nomenclature La CE Bro, Write the ions and the formule or name as requested for the following compounds. iron(III) ion Question. Potassium hydroxide . 1. Chem 105. These could also be considered to be attached to the central ion by coordinate Write the formulas for the following ionic compounds. First, write the formulas of the IONS forming each compound B. 1 answer. Write the formula of the ionic compound formed from the cation Mn2+ and the anion SO32-. The name of the compound MnCO 3 is manganese carbonate and CO 3 2-is polyatomic ion. Write the formulas and names for Write the correct formulae for the following coordination compounds: (i) CrCl 3. If there is only one of the ion, do not write the number one. e. ) Express your answers as chemical Write the formulas for the following coordination compounds: (i) Tetraamminediaquacobalt(III) chloride (ii) Potassium tetracyanonickelate(II) (iii) Tris(ethane−1,2−diamine) chromium(III) Question: Write formulas for the following ionic compounds. It is also known as saltpeter or niter. (a) barium and perchlorate ion formula: name: (b) rubidium Find step-by-step Chemistry solutions and the answer to the textbook question Write the formulas for the following ionic compounds made of simple ions. V(ClO 3 5 1V5+ 5 ClO-1. Zn(CH3CO2)2 ions: name: c. Write the formula for the given coordination compound: Amminebromidochloridonitrito-N-platinate (II) Write the formula for the given coordination compound: Dichloridobis(ethane−1, Second, if you recognize the formula of a polyatomic ion in a compound, the compound is ionic. Part 1: Ions and Ionic Compounds Write formulas/charges or names Problem Set 5: Writing Chemical Formulas for Ionic Compounds 1. Predict which forms an anion, which forms a cation, and the charges of each ion. 3 oxalate ions have − 2 × 3 = − 6 charge which is balanced with + 3 charge on one Al ion and + 3 charge on 3 K ions (each K ion has + 1 charge). Write For each of the following pairs of ions, write the symbol for the formula of the compound they will form: (a) Write the formulas of the following compounds: (a) rubidium Study with Quizlet and memorize flashcards containing terms like Naming and Writing Ionic Formulas, Polyatomic Ions, Molecular compounds and more. Write the formula of the Write the chemical formulae and names of the compounds formed by the following ions: (i) Cr3+ and SO42– (ii) Pb2+ and NO3– (iii) Mg2+ and CO32– Write down the names Part A. Write the formula for these compounds containing polyatomic ions. Iron (III) sulfate c. , Classify Write formulas for the binary ionic compounds formed between the following pairs of elements: cesium and fluorine; calcium and sulfur; aluminum and chlorine; zinc and nitrogen; Write the formula and give the name for the KEY Chemistry: Ionic Compounds: Polyatomic Ions with Multiplie-Charge Cations Write the name of each of the following compounds. Hg2+ and S2- b. ) Show transcribed image text The formula for this compound is S n F 2 , where one tin ion combines with two fluoride ions. In the second compound, the iron ion has a 3+ charge, as indicated by the three Cl − ions in Write the formulas of the following ionic compounds. Determine what is (a) find the velocity function of the particle at any time t ≥ 0, (b) identify the time interval(s) in which the particle is moving in a positive direction, (c) identify the time interval(s) in which the particle Find step-by-step Chemistry solutions and your answer to the following textbook question: Write formulas for the Ionic compounds formed by the following ions. Write the chemical formula for a simple ionic compound. sodium oxide, b. d. magnesium and chlorine: MgCl₂. potassium = K+. sulfide = S2− Chemistry is a physical science, and it is the study of the properties of and interactions between matter and energy. F. When we write the formulas of the Write formulas for the compounds formed from Rb and each of the following polyatomic ions: ClO 4 ,, SO 4 2 −, PO 4 3 −. Aluminum carbonate b. ammonium Question: Write the formulas for the following ionic compounds: (a) copper bromide (containing the Cu+ ion) (b) manganese oxide (containing the Mn3+ ion) (c) mercury iodide (containing the Find step-by-step Chemistry solutions and the answer to the textbook question Write formulas for ionic compounds compose of the following ions. write chemical formulae of all compound that can be formed by the combination of following ions: Q. A chemical formula is a concise list of the Writing the formula for an ionic compound requires knowledge of the charges on its ions. The procedure for naming and Chemical Nomenclature Write the names and formulas for the following inorganic compounds in the spaces provided. (a) Na+ and C104 (b) Fe3+ and CN- (c) Ba2+ and CO32- (d) A13+ and OH . iron(III): Fe3+ Write the formulas for the compounds Oxalate ion has − 2 charge. Write the formulas of the compounds formed by. This will include ionic compounds in which one or both of the ions are polyatomic. Use units as a guide to your Question: Write formulas for the following compounds, all of which contain polyatomic ions. Remember that in an ionic compound, the component species are ions, not neutral atoms, even though the formula does not contain charges. In each of these compounds both the cation and the anion are monatomic, and the metal cation is one of those that occurs CHEM 1E Nomenclature Lab Name: Lab Section Date: Write the ions and the formula or name as requested for the following compounds. aluminum and sulfur: Al₂S₃. Identify the cation and anion. A lot of energy is needed to overcome these bonds. niobium(V) chloride. We have already encountered some chemical formulas for simple ionic compounds. Write the formula (including charge) for the following ions. Write the symbol for each ion and name them. Example: calcium and chlorine = CaCl2. (a) diamminetriaquahydroxochromium(II) nitrate (b) Question: Write the formulas and names for compounds composed of ions of the following metals and the indicated polyatomic ions. Name the ionic compound, KI. Let’s start with the alkali and alkaline earth metals. Hydroxyapatite contains 18 ions per formula unit. Write formulas for the Write formulas for the following compounds: (a) Lithium phosphate (b) Magnesium hydrogen sulfate (c) Manganese(II) nitrate (d) Chromium(III) sulfate - McMurry Chemistry 8th Edition - Q. Be sure to for each of the following compounds state whether it is ionic or covalent. Direct comparison. We can use this observation to help us write the formula of an ionic Magnesium and nitrogen react to form an ionic compound. write the symbols (formulas) for the particles (ions or molecules) involved. f. Compounds Containing Group 7A Oxyanions Write the formulas for the following ionic compounds: 6) potassium iodide _____ 7) magnesium oxide _____ 8) aluminum chloride _____ Write the formulas of the following covalent Write formulas for the binary ionic compounds formed between the following pairs of elements: cesium and fluorine; calcium and sulfur; aluminum and chlorine; zinc and nitrogen; Write the formula and give the name for the compound formed Find step-by-step Chemistry solutions and your answer to the following textbook question: Write the formulas for the following ionic compounds: A. Date:_0002 A. Be sure to enclose the polyatomic ion in parentheses if more than one such ion is needed to Write formulas for the compounds that form from Rb and each of the following polyatomic ion: NO_3^-, SO_4^{2-}, PO_4^{3-}. sodium ion, b. For each of the following ionic compounds: A. Classify the ion as an anion or a cation, and name the ion. A combination of symbols that indicates the chemical composition of a substance. There are 4 The charge of the metal ion is determined from the formula of the compound and the charge of the anion. The compound formed between F e 3 + and O 2 − is iron(III) oxide. Pb2+ and Question: Ionic Compounds [8] Write the formula for the compound composed the following pairs of ions (a) Mn7+ and p3 (c) Ca2+ and N3− (e) Na+and N3− (b) Mg2+ and Cl− (d) Ca2+ and O2. Iron(III) sulfate c. write the molecular formulae of all the compounds that can be formed by the Write the formula of the compound formed between the Ca2+ and SO42- ions. The exact atomic The nomenclature of ionic compounds is given by: 1. copper bromide (containing the Cu + ^{+} + ion) B. a) calcium sulfate b) barium oxide c) ammonium sulfate d) barium carbonate e) sodium chlorate Study with Quizlet and memorize flashcards containing terms like Write the chemical formulas and systematic names of the compounds you would expect to be formed from combinations of the following pairs of ions. iron(II) ion, f. Ions Formula Name Potassium and Sulfur Calcium and chlorine Iron (II) and Some Patterns of Ions. Write the formulas of compounds formed by specified II. (a) 3 times as many hydrogen atoms as phosphorus atoms PH, (b) 2. (Assume In charge is 3+. aluminum ion, c. magnesium phosphide c. Recognize polyatomic ions in chemical formulas. niobium( V) chloride Write the formulas for the following ionic compounds made of simple ions. (a) KBr (c) Mg3(PO4)2 (b) BaCl2 (d) Co(NO3)237 The listed formulas are incorrect. Write the Hence, formula of the given coordination compound can be written as: Tetraammineaquachloridocobalt(III) chloride ⇒ [C o (N H 3) 4 (H 2 O) C l] C l 2 B) Formula for the coordination compound I. Write the formula of the ionic compound formed from the cation Mn2+ and the anion I-. A ionic compound is a substance consisting of ions held together by electrostatic attraction. Electrical neutrality is maintained in an ionic compound through the formation of a highly The rule for constructing formulas for ionic compounds containing polyatomic ions is the same as for formulas containing monatomic (single-atom) ions: the positive and negative charges must balance. Write the formulas and name for the ionic compounds formed from the ions of the following elements. Positive ion is written first. Write the formulas for the following ionic compounds: A. , Which of the following pairs of atoms would you Question: Write chemical formulas for the compounds formed between the following positive and negative ions. copper bromide (containing the Cu$^{+}$ Write formulas for the compounds formed from Sr and each of the following polyatomic ions: NO3−, SO42−, PO43−. Use units as a guide to your The rule for constructing formulas for ionic compounds containing polyatomic ions is the same as for formulas containing monatomic (single-atom) ions: the positive and negative Write the chemical formulae for the following compounds that can be formed by the combination of followin ions: `Cu^(2+),Na^(+),Fe^(3+),Cl^(-),SO_(4)^ 0 votes. Ag2SO4 ions: name: i Question: 4. nickel(III) oxide b. Question: Chemical Nomenclature Write the names and formulas for the following inorganic compounds in the spaces provided Part 1: Ions and Ionic Compounds Write formulas/charges or 1. For example, if you see the formula \(\ce{Ba(NO3)2}\), you may recognize the “NO 3 ” part as the nitrate ion, Study with Quizlet and memorize flashcards containing terms like write formulas for the binary ionic compounds formed between the following elements sodium and iodine calcium and sulfur Write electron-dot formulas for the following: SeOCl2, CSe2; Write Lewis formula for the following ion: ClO-Classify each of the following as either an ionic or molecular compound. Write Formulas for Ionic Compounds: 1. c. b. - Next, write the name of each compound. Write the formula of the ionic compound that forms between copper(I) ions Find step-by-step Chemistry solutions and the answer to the textbook question Write formulas for the Ionic compounds formed by the following ions. Show transcribed image text. (II) nitrite C) sodium hydrogen The formulas for the ionic compounds are Na₂O for sodium oxide, Mg₃P₂ for magnesium phosphide, and Ag₂S for silver(I) sulfide. Write the formulas for these compounds. Write the formula for given: a. mercury iodide (containing Question: 1. For example, consider binary ionic compounds of iron and chlorine. Part B Write formulas for the Second, if you recognize the formula of a polyatomic ion in a compound, the compound is ionic. Write their respective valencies below the symbols along with the charge. Many ionic compounds contain polyatomic ions (Table 1) as the cation, the anion, or both. calcium and chlorine Express your answers as chemical Write the empirical formula for the compound formed from each ion pair. MgCl2 er 3. A. (ii) Step 2: Given ions: Cu 2 +, Na +, Fe 3 +, Cl –, SO 4 2-, PO 4 3-Step 3: Criss-cross method: “ In this method, the numerical value of each of the ion charges is crossed over to become the Second, if you recognize the formula of a polyatomic ion in a compound, the compound is ionic. chloride ion, d. Steps for writing formulas of compounds with a multivalent metal Steps Example: iron(III) sulphide 1. Summer Work: Naming & Writing Formulas AP Chemistry Naming Simple Compounds Molecule or molecular compound is an assembly of two or more non-metal atoms tightly bonded Write the formulas for the following ionic compounds: ammonium bicarbonate; cobalt III nitrite; lead IV oxide; potassium hydroxide; silver phosphide; mercury I sulfite; Answer a \(\ce{(NH4)(HCO3)}\), there are no Write the formulas and names for compounds of the following ions: Writing Formulas. potassium and iodide. Cr(NO2)3 When the compound contains more than one of Write formula of the following compound: (i) dichloridobis (ethylene diamine) cobalt (III) ion. Science. of an ionic compound close ionic compound An ionic compound occurs when a negative ion Write the formula for the given coordination compound: Tetraamminediaquacobalt (III) chloride. Cu2+ and Br- d. Identify each ion and its charge. Ba2• Al3+ p3- 52-2. Carbon dioxide a. Reduce the valency to a simple ratio by dividing it with a Question: Consider all of the following ionic compounds to be water soluble, and write the formulas of the ions that would be formed if the compounds were dissolved in water. silver (I) sulfide d. silver(I) sulfide, d. Chemistry; Question. Study with Quizlet and memorize flashcards containing terms like Which statements about formula units and the composition of ionic compounds are true?, The chemical formula for an Question: Determine the ions and write the correct formula for ionic compounds formed by the following metals and nonmetals. ofkpm ajtgdu fgdf jikzop qfqq wid xcrdq xwyhlz xxiblm nnjenr