The mass of a 20L sample of gas with a density of 0.04 mg/L is

Q1. In an experiment, ammonia gas is made by heating a mixture of ammonium chloride and calcium hydroxide. 2NH4Cl (s) + Ca (OH) 2 (s) = CaCl2 (s) + 2NH3 (g) + 2H2O (l) 10.0 g of ammonium chloride is added to an excess of calcium hydroxide.

If hydrogen temperature goes from 50 tp 75 degrees Celsius in 22g sample, how much heat was used? Give explanation! A. 15,730 J B. 23,595 J C. 7865 J D. 550 J

Can just one measurement be considered precise? Can just one measurement be considered accurate?

An iv solution containing 1000 mg of aminophylline in 1000 ml of solution will completely infuse in 24 hours. how many mg of aminophylline is being infused per hour?

How to classify chemical reactions

When the equation for the combustion of ethane, C2H6, is correctly balanced, the coefficient on oxygen is:

Sahil watched a demonstration in which a scientist combined two substances in a sealed container and analyzed the results. the ending substances did not look the same as the starting substances.

How many molecules of H2S are required to form 79.0 g of sulfur

How many grams of potassium iodide, KI, are required to make 2.0 L of a 0.1M solution

Which term refers to an electrochemical cell that produces an electric current? A) electrolyte B) voltaic cell C) electrolytic cell D) cathode