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Calculate the molar mass for each of the following:
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Basic Chemistry
- Copper(I) iodide (CuI) is often added to table salt as a dietary source of iodine. How many moles of CuI Are contained in 1.00 lb (454 g) of table salt containing 0.0100% CuI by mass?arrow_forwardMoles within Moles and Molar Mass Part 1: a How many hydrogen and oxygen atoms are present in 1 molecule of H2O? b How many moles of hydrogen and oxygen atoms are present in 1 mol H2O? c What are the masses of hydrogen and oxygen in 1.0 mol H2O? d What is the mass of 1.0 mol H2O? Part 2: Two hypothetical ionic compounds are discovered with the chemical formulas XCl2 and YCl2, where X and Y represent symbols of the imaginary elements. Chemical analysis of the two compounds reveals that 0.25 mol XCl2 has a mass of 100.0 g and 0.50 mol YCl2 has a mass of 125.0 g. a What are the molar masses of XCl2 and YCl2? b If you had 1.0-mol samples of XCl2 and YCl2, how would the number of chloride ions compare? c If you had 1.0-mol samples of XCl2 and YCl2, how would the masses of elements X and Y compare? d What is the mass of chloride ions present in 1.0 mol XCl2 and 1.0 mol YCl2? e What are the molar masses of elements X and Y? f How many moles of X ions and chloride ions would be present in a 200.0-g sample of XCl2? g How many grams of Y ions would be present in a 250.0-g sample of YCl2? h What would be the molar mass of the compound YBr3? Part 3: A minute sample of AlCl3 is analyzed for chlorine. The analysis reveals that there are 12 chloride ions present in the sample. How many aluminum ions must be present in the sample? a What is the total mass of AlCl3 in this sample? b How many moles of AlCl2 are in this sample?arrow_forward2. Calculate each of the following: a. Mass % of N in dinitrogen trioxide b. Mass % of I in strontium periodate c. Mass % of H in ammonium bicarbonatearrow_forward
- Maleic acid, which is used to manufacture artificCial resins, has the empirical formula CHO. Its molar mass is 116.1 g/mol. What is its molecular formula? Select one: O a. C,H,0, b. CH,0, C. CHO d. C,H,0,arrow_forward24 In which of the following molar quantities of sulfur would 1.475 x 10 atoms of sulfur be present (molar mass of S= 32) Select one: O a. 2. 15 moles O b. 2.45 moles O C. 2.25 moles O d. 2.35 molesarrow_forward4. How many moles of Vitamin E ( the formula is written down) are present in 10.0 g of Vitamin E? Vita min E : C29H50O2 3.39x10-?mol O 2.07x10-mol O 2.32r10-molarrow_forward
- 1. a. What is the empirical formula of a compound with the following mass composi- tion: 40.92% C 4.58% H 54.50% 0? b. The molar mass of this compound is 176.1 g/mole. What is its molecular formula?arrow_forwardA common ingredient in homemade laundry detergents is Washing soda, you were asked to do an analysis of a sample of this ingredient. You found the sample contains 4.20% C and 7.05% H. What is the formula for washing soda if this ingredient is a hydrate of sodium carbonate? Select one: O a. NazCO3x4H2O O b. Na,CO3X10H2O Oc. N2 CO3X6H;O O d. NazCO3x2H20 e. NazCO3x8H2Oarrow_forwardA mineral ore is found to be a pure compound consisting of 29.1% sodium, 40.6% sulfur, and the st oxygen, by weight. a. Find the empirical formula (Na?S O?) for this compound 2 1 b. If the molecular weight of the compound is 158.2 g/mole, what is the molecular formula? BiNarrow_forward
- A chemical compound is analyzed for its elemental composition, and is found to contain 57.14% carbon, 4.80% hydrogen, and 38.06% oxygen. The empirical formula for this chemical compound is: A. C2H2O B. CH2O C. C2H4O D. C2H4O2 E. C4H6Oarrow_forwardCalculate the percent composition of sodium in borax ,Na2 B2 O7 used in commercial laundry process. Atomic mass: Na=23, B=10.81,O=16 a.22.89% b.38.18% c.48.25% d. 25.60%arrow_forwardCalculate formula mass and the molar mass of each of thefollowing formula units:a. NaCl b. Na2SO4 c. Fe3(PO4)2arrow_forward
- Chemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStaxGeneral Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage Learning