What defines an exothermic reaction?

O A. A reaction that needs heat added

O B. A reaction that possesses enthalpy

O c. A reaction that relies on collisions

O D. A reaction that produces heat

How will the vapor pressure of a solution compare to the pure solvent?

How much heat is required to heat 9.61g of ethanol (CH3CH2OH) from 24.10C to 67.30C?

CH4 + 2O2? CO2 + 2H2O In the chemical reaction, if 10 moles of H2O are produced, moles of CO2 are also produced.

Consider the balanced equation below. N2H4 + 2H2O2 → N2 + 4H2O What are the mole ratios of hydrazine (N2H4) to hydrogen peroxide (H2O2) and hydrazine to water? 1:2 and 1:4 1:3 and 1:4 1:2 and 3:5 1:3 and 3:5

Name one factor that determines how much potential energy there is in a roller coaster ride

What is the pH of a solution with [H+] = 7.0 x 10^-2?

A compound is a pure substance made of 2 or more types of elements that are chemically bonded True or false

In a chemical reaction, 300 grams of reactants are combined with 100 grams of reactant b. both a and b react to completion. how much will the product weigh

If log x = - 0.761. What does x equal

Can humans can live without using natural resources.