How many oxygen molecules are in 3.36 g of oxygen

Which of the following elements ia an alkali metal? A. potassium B. calcium C. chromium D. germanium

If 15 grams of an organic solid is dissolved in 80 mL of water, how many grams remain in the water after extraction with 50 mL of a solvent which has a partition (distribution) coefficient with water of 8? Show calculations.

Which nuclear emission moving through an electric field would be deflected toward the positive electrode? A.) Alpha Particle B.) Beta Particle C.) Gamma Radiation D.) Proton

Which type of bond is salt

What's the formula for melatonin

Describe two important functions for carbon dioxide in the atmosphere.

In the chemical reaction: 2 h 2 (g) o2 (g) → 2 h2o (g), with 8 grams of h 2 (2 grams/mole) and 16 grams of o2 (32 grams/mole) and the reaction goes to completion, what is the excess reactant and how much of that would remain

What is the volume of a gold nugget that weighs 2.20 kg? The density of gold is 19.28 g/cc.

Find the percentage composition of carbon in H5C2O

When studying atoms, scientists can ignore the force between charged particles that make up the atoms because it is many millions of times smaller than other forces in the atom.