Identify some of the signs that has a chemical change has occurred

In a nuclear fusion reaction, the mass of the products is (1) less than the mass of the reactants because some of the mass has been converted to energy (2) less than the mass of the reactants because some of the energy has been converted to mass (3)

How many grams of calcium sulfite are produced daily by this power plant?

Two sealed flasks each have a volume of 2.0 liters. Flask A contains N, O gas and Flask B contains H, gas both at 1 STP. Each gas has the same -

What did johann wolfgang döbereiner contribute to the periodic table?

Identify the catalyst in this reaction, explain how you know it is the catalyst, and describe how it increases the rate of the reaction.

35mL of acid with an unknown concentration is titrated to completion using 63mL of 3.0 MNaOH. What is the concentration of the acid?

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry, such as clf2-?

Look carefully at Kw expression. If the [H+] changed from [1 x 10-7] to [1 x 10-4], the [OH-] will: A. remain the same B. increase C. decrease

What on a bird, besides it's feet, is chemically similar to scales? A. beak B. feathers C. wings

What are the carbon (C) and oxygen (O) in carbon dioxide (CO2) ? (select all that apply) A) Atoms B) Compounds C) Elements D) Molecules