Which of theses chemical equations are balanced. a. H2OSO4+2Al>Al2 (SO4) 3+H2 or b. 2KCl+Pb (NO3) 2>2KNO3+PbCl2

Which of the following properties is not unique to water? Surface Tension Viscosity Density Adhesion

1. What is meant by the term oxidation? a. The loss of electrons by the compounds in chemical reactions. b. The gain of electrons by the compounds in chemical reactions. c. The combining of elements with O in chemical reactions. 2.

Which gas sample would likely not act like an ideal gas? Choose one of the following, 1. A sample of oxgen gas at low pressure 2. A sample of oxygen gas at high temperature 3. A sample of argon gas at high pressure 4.

A solution of sugar contains 35 gramsof sucrose, C12H22O11in 100 mL of water. What is the percent composition of the solution?

A substance is followed by the symbol (l) in a chemical equation. What does the symbol represent? A. The substance has the least molecules in the equation. B. The substance is in the liquid state. C. The substance is produced last in the reaction. D.

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?

In which era did the first fish appear? a. Carboniferous b. Paleozoic C. Mesozoic d. Permian