Substance a has a mass of 8 grams with a volume of 10 mL what is the density of substance A

During a chemical reaction, the amount of energy - may increase or decrease depending on the type of reaction - increases as it is converted from one form to another - decreases as it is converted from one form to another - is constant as it is

What are the five rules for significant figures? Give some examples

A mass of 34.05 g of H2O (s) at 273 K is dropped into 185 g of H2O (l) at 310. K in an insulated container at 1 bar of pressure. Calculate the temperature of the system once equi - librium has been reached.

Which elements can react to produce a molecular compound? (1) calcium and chlorine (2) hydrogen and sulfur (3) lithium and fluorine (4) magnesium and oxygen

Which factors affect growth of the human population? migration births deaths

Which is NOT a property of gold? A. rare B. tarnishes C. malleable D. corrosion resistant

The element rubidium has two naturally occurring isotopes. The atomic mass of 85Rb (72.17 percent abundant) is 84.911794 amu. Determine the atomic mass of 87Rb (27.83 percent abundant). The average atomic mass of Rb is 85.4678 amu.

Describe what you can do to slow down, or stop the continuous negative human treatment of our aquatic biomes.

If the hydrogen ion concentration is 10-7M, what is the pH of the solution? Show all work.

When it is raining water is returning to earth as a water cycle stage called