1. What is the percent composition of CaCO₃? Show your work.

2. What is the mass of sodium in 50 grams of salt? Show your work.

3. What two general products do combustion reactions create?

4.

Bacteria and viruses are inactivated by temperatures above 139 ∘C in an autoclave. An autoclave contains steam at 1.00 atm and 100 ∘C.

Select the correct answer. Why is the melting of ice a physical change? A. It changes the chemical composition of water. B. It does not change the chemical composition of water. C. It creates new chemical bonds. D. It forms new products. E.

Why is it difficult to construct a practical calendar based on the moons cycle of phase

How to find mass in chemistry

Why is graphite used instead of gold or copper wires to conduct electricity in very hot situations such as an industrial kiln?

What element has two electrons in its fourD sub level

La temperatura a la cual las partículas de los gases no se mueven es: 1) Cero grados centigrados 2) 273 K 3) cero absoluto 4) cero grados Fharenheit

Compare the hydronium ion concentration of the solution having a ph of 2.0

Look at the following chemical formula. How many total elements and total atoms are present in the formula? 2NaHCO3

How many covalent bonds does hydrogen have