What is a polyatomic ion? Also, how do I identify that sulphate is a polyatomic ion?

What is the approximate age of the oldest fossils of early human ancestors?

What is the definition of crust?

Describe the physical and chemical properties of a raft that would be important to ensure your safety.

Given the balanced equation: I2 (s) + energy = = > I2 (g) As a sample of I2 (s) sublimes to I2 (g), the entropy of the sample (1) increases because the particles are less randomly arranged (2) increases because the particles are more randomly

True or false most meteoroids burn up the ionosphere

Carbon dating advisable for measuring materials ages for a few years, thousands of years, millions of years

What is the pH of a solution with [H+] = 7.0 x 10^-2?

A compound is a pure substance made of 2 or more types of elements that are chemically bonded True or false

In a chemical reaction, 300 grams of reactants are combined with 100 grams of reactant b. both a and b react to completion. how much will the product weigh

If log x = - 0.761. What does x equal