4. A solution contains 4.5 x 10^-5 M HCl. Determine the following:

a. [H3O+] b. [OH-] c. pH

The specific heat of liquid water is 4.184 j/g·? c. calculate the energy required to heat 10.0 g of water from 26.5? c to 83.7? c. 1. 572 j 2. 837 j 3. 2.39 * 103 j 4. none of these 5. 239 j

Part a how many carbon atoms are in a 2-carat pure diamond that has a mass of 0.40 g. express your answer using two significant figures.

A scientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. Which term most likely describes what she is measuring?

A pilot and a flight attendant get married and leave for their honeymoon on an airplane. Well meaning friends pack the plane with balloons. As the plane gains altitude, the balloons begin to pop.

How much heat is evolved in converting 1.00 mol of steam at 135.0 ∘c to ice at - 45.0 ∘c? the heat capacity of steam is 2.01 j / (g⋅∘c) and of ice is 2.09 j / (g⋅∘c) ?

The electric force between two charged objects is 0.24 newtons. If the distance between them is increased by a factor of 4, what will be the new force? A. 0.015 newtons B. 0.03 newtons C. 0.06 newtons D. 0.12 newtons E. 0.36 newtons

Why do you need a balanced equation for stoichiometry?

The density of gold is 19.3 g/cm3. What is the volume of a 13 g gold nugget?

Glucose, C6H12O6, C6H12O6, is used as an energy source by the human body. The overall reaction in the body is described by the equation C6H12O6 (aq) 6O2 (g) ⟶6CO2 (g) 6H2O (l) C6H12O6 (aq) 6O2 (g) ⟶6CO2 (g) 6H2O (l) Calculate the number of grams of

Which two bases pair with each other?