please show work 1. In old British money, there were 4 farthings in a penny, 12

ID: 818864 • Letter: P

Question

please show work

1. In old British money, there were 4 farthings in a penny, 12 pennies in a shilling and 21 shillings

in a guinea. In this system, the number of farthings in a milli-guinea is:

2. The neutral element that has 53 neutrons and 42 electrons is:

3. The number of moles of oxygen gas needed to make 2.0 moles of water is:

4. Based on the balanced reaction, the number of moles of oxygen molecules needed for the complete

combustion of one mole of C2H6O to carbon dioxide and water is

5. 2.0 moles of liquid carbon tetrachloride contains:

6. A compound is determined to contain 40.23% Mo and 59.85% Cl by weight. The empirical formula

for this compound is:

Answer the next three questions based on the following information. Combustion of a 0.4339 g sam-

ple of paraquinone yielded 1.060 g CO2 and 0.1446 g H2O. Paraquinone contains only C, H, and O.

7. The number of moles of carbon in the original sample is:

8. The number of grams of hydrogen in the original sample is:

9. The number of grams of oxygen in the original sample is:

10. The molar mass of potassium nitrate (in g/mole) is:

11. 16.4 g of C2H4(l) was allowed to react with 37.4 g of Cl2(g) forming ethylene chloride, C2H4Cl2(g)

as the only product. The maximum amount of ethylene chloride that could be formed is:

12. When 24.0 g of carbon is combined with 32.0 grams of oxygen gas 44.0 grams of carbon dioxide is

produced. The % yield for this reaction is:

13. Which of the following contains the largest number of hydrogen atoms?

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