Which of the following changes when a catalyst is used

Enthalpy of reaction

activation energy

both enthalpy of reaction and activation energy change

neither enthalpy of reaction nor activation change

A 0.388 g sample of a monoprotic acid is dissolved in water and titrated with 0.280 M NaOH. What is the molar mass of the acid if 10.

DDT was a hazardous: a) insecticide b) disease c) industrial waste d) weed killer

Which describes a spontaneous reaction? a. Positive ΔH b. Negative ΔH c. Positive ΔG d. Negative ΔG e. Positive ΔS

How do I find the electronegativity of an element

Being raped by a date or acquaintance is less traumatic than being raped by a stranger. question: being raped by a date or acquaintance is less traumatic than being raped by a stranger.

Describe the preparation of 2.00 L of 0.100 M glycine buffer, pH 9.0, from glycine and 1.00 M NaOH.

Reducing the volume of a contained gas by one third, while holding temperature constant, causes pressure to A. be decreased by two thirds. B. be increased by two thirds. C. be decreased by one third. D. be increased by one third

What is the percent mass/volume of a solution having a mass of 65.00 grams and a volume of 600ml

This element has 3 electrons in its Lewis dot structure and is in the 3p orbital section.

In an exothermic reaction, energy is transferred from a. the reactants to the surroundings. c. one reactant to another. b. the surroundings to the reactants. d. the container to the chemicals.