If you have 400 grams of a substance that decays with a half-life of 14 days, then how much will you have after 56 days?

Formula gravity of acon due to

Calculate the number of moles of each substance in C2H5OH

Which direction does 3A + 2B = C + 2D + Heat

A particular power source contains a chemical that releases electrons on one side and a chemical that accepts the electrons on the other side. This flow of electrons from one side to the other provides power.

Balance the equation. SiO2 + CaC2 → Si + CaO + CO2

Suppose a solution was too concentrated for an accurate reading with the spectrophotometer. The concentrated solution was diluted by placing 1.00 mL of the concentrated solution in 4.00 mL of water.

What kinds of scientific investagations involve making observations

According to the kinetic molecular theory, when a gas particle hits something what will happen?

Protons and neutrons are made from which of the following? hadrons down quarks only up quarks and down quarks up quarks only

Not all of the water falls as rain, snow, or sleet evaporates. What happens to the rest of the water?