What percent of earths surface is made up of oxygen

What type of reaction is C 12 H 22 O 11> 12C+11H2O

Another name for the acid test ratio is the

Based on Reference Table I, which change occurs when pellets of solid NaOH are added to water and stirred? (1) The water temperature increases as chemical energy is converted to heat energy.

If the CaCO3 weighed 983 g and the CaO weighed 551 g, how many grams of CO2 were formed in the reaction?

The metal sodium is obtained by electrolysis of common table salt (sodium chloride, nacl). how much sodium chloride needs to be decomposed to obtain 2500 g of sodium?

Nitrous oxide (n2o), or laughing gas, is commonly used as an anesthetic in dentistry and surgery. how many moles are present in 8.4 liters of nitrous oxide at stp?

How can an atom be electrically neutral when it contains particles that are charged?

Is boiling water considered physical or chemical bond

Which of the following is the correct scientific notation for 0.000451 g? 4.5 x 10-3 4.5 x 10-5 4.51 x 10-4 45.1 x 10-4

A phase change from a solid to a gas is called what