What is the energy released or absorbed as heat when one mole of a compound is produced by combination of its elements? select one:

a. heat of combustion

b. free energy

c. entropy

d. heat of formation?

Large doses of vitamin C are supposed to cure the common cold. One commercial over-the-counter product consists of 500.0-mg tablets that are 20.0% by weight vitamin C. How many tablets should one take for a 0.

Explain the effects of nh3 and hcl on the cuso4 solution in terms of

What is the molarity of 500 ml of a solution containing 85.0g AgNO3? A) 0.5 M B) 1.0 M C) 2.0 M D) 5.0 M

400 ml of a gas (@stp) has a mass of 0.792 g. what is the molecular mass of this gas

Which components of an atom have a positive charge? a. neutrons b. all components have a positive charge c. electrons d. protons

Can you live without body tissue? This is a yes or no question, no explaining required, but you can add it if you want. : D

According to the graph, which activity has used the largest amount of water over the past twenty years?

Tiffany leaves balloons filled with helium gas inside her car in on a sunny day when she returns to her car some some of the balloons are much larger and a few have popped explain what happened

If the pH indicator bromothymol blue was added to the nitric acid solution, it's colour would be?

Which statement describes a chemical reaction? Atoms in the products are rearranged to form new substances. Atoms in the reactants are rearranged to form new substances. Atoms in the products change into new atoms to form new substances.