What does the the release or absorption of energy indicate? a. physical change b. chemical change c. physical and chemical changes d. neither physical nor chemical changes

Consider the balanced equation below. n2h4 + 2h2o2 n2 + 4h2o what are the mole ratios of hydrazine (n2h4) to hydrogen peroxide (h2o2) and hydrazine to water? 1: 2 and 1: 4 1: 3 and 1: 4 1: 2 and 3: 5 1: 3 and 3: 5

Which of the following units is not an official si unit? mole liter kilogram ampere

What is the approximate vapor pressure when the gas condenses at 70 degrees celsius