A prediction or statement that can be tested is

Sylvanite is a mineral that contains 28.0% gold by mass. How much sylvanite would you need to dig up to obtain 63.0 grams of gold?

What is the term for the outer electron shell of an atom? a. covalent b. ionic c. metallic d. valence

Calculate ΔGrxn for this equation, rounding your answer to the nearest whole number. CaCO3 (s) → CaO (s) + CO2 (g) ΔGf, CaCO3 = - 1,128.76 kJ/mol ΔGf, CaO = - 604.17 kJ/mol ΔGf, CO2 = - 394.4 kJ/mol

This is the chemical formula for acetic acid (the chemical that gives the sharp taste to vinegar) : ch3co2h an analytical chemist has determined by measurements that there are 1.204 moles of carbon in a sample of acetic acid.

A nuclear power plant is built alongside a river. What measurements should a monitoring station downstream record to be sure that the proper procedures are being followed at the power plant?

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda