What causes fireworks

Nuclear fusion occurs within stars when which of the following happens? A. Protons combine with protons. B. Protons combine with electrons. C. Neutrons combine with protons. D. Neutrons combine with neutrons.

What is the theoretical yield of waffles if you have 6 cups of flour, 9 eggs and 2 tbs of oil? Given: 2 cups flour + 3 eggs + 1 tbs oil 4 waffles

Which of the following is not a skill scientist use to learn about the world A. Predicting B. Observing C. Inferring D. Scientist use all of the above skills

If 0.66 g magnesium reacts exactly with 0.43 g oxygen, what mass of magnesium oxide will be produced?

The weight of water vapor in a pound of air is measured in

When 25.0 mL of sulfuric acid solution was completely neutralized in a titration with 0.05 M NaOH solution, it took 18.3 mL of the NaOH (aq) to complete the job.

Determine the number of hydrogen atoms in 1.5 moles of water, h2o, molecules

ALL salts are formed by ions. What does this tell us about the elements they are made of?

A sample of a material has 200 radioactive particles in it today. Your grandfather measured 400 radioactive particles in it 90 years ago.

What term expresses the ratio of moles of reactants and products according to the coefficients in the balanced chemical equation? A) mole ratio B) reactant ratio C) product ratio D) yield ratio E) none of the above