3. Combining 167.7 g of Fe with excess water produces 6.00 g of hydrogen gas. What is the percent yield?

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.