Which of the following elements is the most reactive?

Chlorine

Bromine

Fluorine

Helium

For real gases, how does a change in pressure affect the ratio of PV to nRT? a. The ratio decreases as pressure increases. b. The ratio increases as pressure increases. c. The ratio is constant at all pressures.

The first-order rearrangement of CH3NC is measured to have a rate constant of 3.61 x 10-15 s-1 at 298 K and a rate constant of 8.66 * 10-7 s-1 at 425 K. Determine the activation energy for this reaction.

A compound is broken down by chemical means during (1) chromatography (2) distillation (3) electrolysis (4) filtration

If you have 20 grams of parent material, and one half-life goes by, how much parent material do you have remaining?

Which gas occupies the highest volume at STP? 0.02 mol of O2 0.1 mol of Cl2 1 mol of N2 2 mol of H2

Enter a chemical equation for LiOH (aq) LiOH (aq) showing how it is an acid or a base according to the Arrhenius definition. Consider that strong acids and bases dissociate completely. Express your answer as a chemical equation.

Percent copper in brass lab

Which statement best describes Rutherford's model of the atom?

If a net force of 5.0 forward acts on a 0.60 kg toy car, what is it's acceleration?

Which physical method can be used for obtaining a sample of salt from a small beaker of salt water? boiling freezing chromatography sorting