Which word describes AH for exothermic reactions?

O negative

O small

positive

O zero

An element's atomic mass does not include the mass of its Electrons Protons Neutrons

Where are elements that form molecules of two of the same atoms commonly found on the periodic table?

Which of the following is a biogeochemical cycle? a. Atmospheric cycle b. Iconic cycle c. Neonic cycle d. Water cycle

A nuclear family consists of

Which measurement of length is the smallest? A. 9 * 10 ^-6 B. 7 * 10^-5 C. 7 * 10^1 D. 9 * 10^2

2 H2 + O2 → 2 H2O What is the product of this chemical reaction

Which of the following is a chemical property? A.) Ability to burn B.) Mass C.) Density D.) All of the above

What is the density of rock if it has a mass of 25 g?

In a popular classroom demonstration, solid sodium is added to liquid water and reacts to produce hydrogen gas and aqueous sodium hydroxide. part a write a balanced chemical equation for this reaction.

Calculate the vapor pressure lowering on an aqueous solution of glycerin that contains 180g of glycerin and 1000g of water at 25c. The vapor pressure of water at this temperature is 23.8torr.