Which is the formula mass of Na₂SO₄? *

1. 119 amu

2. 125 amu

3. 142 amu

4. 174 amu

Which of the following is a way to reduce our total energy use? a) use energy more efficiently b) get more heat energy from electrical devices c) increase the amount of fossil fuels we use

What are the two sources or heat in earth's interior? A) radioactive decay and convection currents B) magma and liquid outer core C) sunlight and meteor impacts D) leftover heat from formation and radioactive decay

6. Identify the type of reaction shown by this chemical equation: 2A1 + Cl2 → 2AICI

An aluminum can has a height of 4.83 inches, a diameter of 2.60 inches, and a uniform wall/end thickness of 0.0112 inches.

What experimental evidence did Thomson have for each statement? A. Electrons have a negative charge. B. Atoms of all elements contain electrons.

Normal cellular pH has a hydrogen concentration of 3.98 x 10-8 M. what is the pH of a cell

What is evaporation? Describe what happens at the molecular level during evaporation.

Write is the chemical formula for calcium and chlorine

Using EDTA as the titrant and a free metal in solution is called a direct titration. This can be measured using an indicator that changes color when the metal is no longer in solution.

What is the relative formula mass for ammonium sulphate