Question

Chapter 6
1.) How many atoms are in each elemental sample?
Part A.  3.3 molCu
Part B. 8.7×10⁻³ mol C
Part C. 24.5 mol Hg
Part D. 0.300 mol Na

2.) 1 mol 6.022×10^23
Suppose you have 897 sheets of paper.
Part D. How many moles of paper do you have?

3.) How many moles of atoms are in each elemental sample?
Part A. 1.50 g Zn
Part B. 28.9 g Ar
Part C. 73.0 g Ta
Part D. 2.28×10⁻² g Li

4.) How many aluminum atoms are in 2.14 g of aluminum?

5.) How many atoms are in each elemental sample?
Part C. 9.28 g Bi
Part D. 34.8 g P

7.) Determine the number of moles of molecules (or formula units) in each sample.
Part A. 44.2 g sodium chloride
Part B 33.9 g nitrogen monoxide
Part D 2.02 mg carbon tetrachloride

8.) How many molecules are in each sample?
Part A. 3.7 g H2O
Part B. 43.6 g N2
Part C. 82 g CCl4
Part D. 11 g C6H12O6

11.) Determine the number of moles of C in each sample
Part A. 2.2 mol CH4
Part B. 0.127 mol C2H6
Part C. 4.89 mol C4H10
Part D. 23.2 mol C8H18

12.) How many grams of Cl are in 27.6 g of each sample of chlorofluorocarbons (CFCs)?
Part B. CFCl3
Part C. C2F3Cl3
Part D. CF3Cl

15.) Copper (II) fluoride contains 37.42 % F by mass.
Part A. Use this percentage to calculate the mass of fluorine in grams contained in 39.5 g of copper (II) fluoride.

Answer 1