The what of an element is the average mass of all isotopes of that element

At STP conditions, 0.25 mole of CO 2 (g), H 2 (g), NH 3 (g) will:

1.) Convert 202.1 km to millimeters

Explain why a solution can have many solutes, but only one solvent.

If i add water to a saturated sucrose solution, what will happen?

Inteoduction yo balancing equations

Human muscle stores sugars in the form of

How much heat is needed to raise the temperature of 75 g of a substance by 15 C when the specific heat is 0.92 J/g-C?

A nitric acid solution flows at a constant rate of 5L/min into a large tank that initially held 200L of a 0.5% nitric acid solution. The solution inside the tank is kept well stirred and flows out of the tank at a rate of 10L/min.

How many molecules are in 237g (about a cup of water)

3. A compound was analyzed and found to contain 9.8 g of nitrogen, 0.70 g of hydrogen, and 33.6 g of oxygen. What is the empirical formula of the compound?