Which of the following molecules contain double covalent bonds?

a) ammonia

b) carbon dioxide

c) hydrogen chloride

d) methane

What problem can fossil fuel create for life on earth?

Which statement describes a catalyst? Catalysts appear as reactants in a chemical equation. Catalysts are completely consumed by the reaction. Catalysts provide a lower energy pathway for the reaction.

Which is produced by the dehydration of primary alcohols? A) an acid B) a ketone C) an ether D) an ester

How many molecules are in 1.00 g of C10H14N2? 3.71 x 1021 9.76 x 1025 1.02 x 10-26 2.32 x 1022

Write a chemical equation for hno3 (aq) showing how it is an acid or a base according to the arrhenius definition

What is the biggest difference between an exothermic and endothermic process? A. The direction of energy flow. B. The amount of energy transferred. C. The type of energy being transferred. D. The speed with which energy is transferred.

The mass of 1 mol of chromium (atomic mass 51.996 amu) is

Which of the following elements will tend to form a cation? A. Oxygen B. Nitrogen C. Sulfur D. Lead E. All of the Above

Is pure orange juice a solution or a suspension

If a catalyst is used in a reaction: a. the energy of activation increases. b. the reaction rate does not change. c. the reaction rate increases. d. the equilibrium shifts.