Which of the following is a velocity? a) 30 m/s (meters per second) b) 30 m/s (meters per second) going down c) 30 km/s (kilometers per second)

Which mathematical relationship should you us to convert moles of a substance into grams

An alpha particle is: a hydrogen atom a nucleus of helium two neutrons an electron

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.