The theoretical yield of ammonia in an industrial synthesis was 550 kg, but only 480 kg was obtained. What was the percentage yield of the reaction?

An automobile gasoline tank holds 42 kg of gasoline. When the gasoline burns, 168 kg of oxygen are consumed and carbon dioxide and water are produced. What total combined mass of carbon dioxide and water is produced?

it is difficult to evaluate the toxicity of substances what factors can vary how harmful a chemical is dose of exposure age and genetic makeup will affect response to a toxin.

What type of relief does a flat area have?.

According to Le Chatelier's principle, increasing the pressure of the system shown below will shift equilibrium to the left (towards reactants). N2 (g) + 3H2 (g) = 2NH3 (g) True or False

How many kilojoules of energy are absorbed when 800.0g of water is heated from 20.0º C to 50.0º C

What is group 18 on the periodic table called? a. noble gases b. metalloids c. nonmetals d. metals

Explain the difference between the greenhouse effect and global warming.

Ionic bonds are formed between metals and non-metals to form salts. a. True b. False

In a closed or isolated system, matter can not be created or destroyed. It can change Forms but is conserved true or false

Explain in terms of element classification, why K2O is an ionic compound