Which equation shows conservation of atoms?

A) H2 + O 2 - - > H2O

B) H2 + O 2 - - > 2H2O

C) 2H2 + O2 - - > 2H2O

D) 2H2 + 2O2 - - > 2H2O

Tritium 3 1H decays to 3 2He by beta emission. Find the energy released in the process. Answer in units of keV.

Why the noble gases tend not to react

The escape velocity required for gas molecules to overcome the earth's gravity and go off to outer space is 1.12 x 103m/s at 15oC. Calculate the molar mass of a species with that velocity.

Which one of the following statements is NOT a correct statement of the Law of Conservation of Mass? a) The mass of a system is conserved in a chemical reaction. b) The mass cannot be created or destroyed by chemical reactions.

Alka-Seltzer is a solid mixture of two substances, sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7). The substances react to form water, carbon dioxide (CO2), and Na3C6H5O7.

What can form as a result of a chemical reaction?

A solution of orange juice that weighs 500 g contains liquid juice and solid pulp. All of the pulp is removed from the juice. The pulp is found to weigh 50 g. How much would the remaining liquid juice weigh? A. 50 g B. 250 g C. 450 g D. 500 g

Assume 3 molecules of Fe react according to the following equation. 3Fe + 4H2O Fe3O4 + 4H2 How many molecules of H2 are produced? How many water molecules are required? What is the mole ratio of Fe to H2O?

10.0 mL of a HF solution was titrated with a 0.120 N solution of KOH; 29.6 mL of KOH were required to completely neutralize the HF. Calculate the normality of the HF solution.

The number of grams present in 1.35 mol of Fe is