5. Calculate the mass of water produced by 95.2 grams of CH4.

CH4(g) + 2O2(g) ---> CO2(g) + 2H2O(l)

7. For the following reaction, what mass of all species are present after the completed reaction of 60.1 g of SiO2 and 40.0 g of C?

11. For a titration reaction between hydrochloric acid and sodium hydroxide, 45 mL of .0850M sodium hydroxide was used to titrate 100 mL of hydrochloric acid. What is the mass of hydrochloric acid in the original 100 mL solution?

SiO2(s) + 3 C(s) ---> SiC(s) + 2 CO(g)

15. a. Write the balanced reaction between aqueous hydrochloric acid (use H+ and ignore the Cl-) and solid copper to produce copper (II) chloride and hydrogen gas. Label the oxidation numbers.

a. How many moles of ethene are in 2.56 grams of ethene?
b. How many grams of ethene in .5 moles of ethene?
c. How many ethene molecules are in 7.88 grams of ethene?
d. How many hydrogen atoms are in 6.66 grams of ethene?

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