a pure substance that can't be broken down into simpler substances by chemical or physical means.

A. chemical

B. atom

C. element

D. mineral

You have 500 mL of 5 M HCl already made. You need to dilute the solution to 1 M HCl. How much water will you need to add?

What is the most likely explanation for the change in population that occurred at 1.5 years?

Propane (C₃H₈) burns in oxygen to produce carbon dioxide and water. What is the correct form of the chemical equation that describes this reaction?

You heat a piece of iron from 200 to 400 K What happens to the atom's energy of random motion

A chemical bond formed by the transfer of electrons is a

What happens when electrons are passed from one atom to a more electronegative atom?

Calculate the k sp for zinc hydroxide if the solubility of zn (oh) 2 in pure water is 2.1 * 10-4 g/l. calculate the k sp for zinc hydroxide if the solubility of zn (oh) 2 in pure water is 2.1 * 10-4 g/l. 2.9 * 10-3 1.5 * 10-3 9.9 * 10-18 3.8 * 10-17

What is the importance of the coefficients in a balanced chemical reaction?

The process that changes the identity and number of protons in a nucleus is

Which best describes the process of igneous rock formation?