Name two elements that have properties similar to those of beryllium, Be, and have average atomic masses higher than 130

What is needed in order to determine a mole ratio?

A solution that is 20% acid and 80% water is mixed with a solution that is 50% acid and 50% water. If twice as much 50% acid solution is used as 20% solution, then what is the ratio of acid to water in the mixture of the solutions?

What is a chemical equation? A. a substance B. a shorthand representation of a chemical reaction C. a shorthand representation of a chemical bond D. a diatomic molecule

Either aluminum or zinc will replace silver ion in silver nitrate to give silver metal and aluminum nitrate or silver metal and zinc nitrate

Explains why heating a liquid affects its viscosity? The molecules move faster at higher temperatures and overcome attractions more easily. The molecules move faster at higher temperatures, and the attractions between them increase.

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

Which can associate a suspect's gun with a crime?