1. A chemist combines 4.9 g of hydrogen gas with 9.4 grams of nitrogen gas to form 11.4 g of ammonia. 2.9 g of nitrogen gas is remaining.

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate

Water undergoes a large change in density at 0 ∘ c as it freezes to form ice. calculate the percent change in density that occurs when liquid water freezes to ice at 0 ∘ c given that

Is this correct if not can u correct me