In an exothermic reaction what is true of enthalpy?

A) it has increased

B) it has decreased

C) it has remained unchanged

D) it has a minimum doubled

Which seismic wave moves through Earth the fastest?

If the passing of five half-lives leaves 25.0 mg of a strontium-90 sample, how much was present in the beginning

In order to occupy the same orbital two electrons must have

The amount of energy released when 50.0 kg is converted into energy is x 10A

5.80 mol of solid A was placed in a sealed 1.00-L container and allowed to decompose into gaseous B and C. The concentration of B steadily increased until it reached 1.20 M, where it remained constant.

What is the difference between a root word and a combining form? List 2 examples of combining form

What is the octet rule and how does it explain the formation of ionic compounds?

Can somebody explain step by step how to solve decomposition reactions?

Which of the following statements are correct about the chemical reaction? H2 + O2 - > H2O2 versus 2 H2 + O2 - > 2 H2O? They are both balanced chemical equations. The two reactions are equivalent. The laws of thermodynamics apply to both.

What do chemists use to describe a chemical reaction