Which of these is a compound?

A) air

B) sugar C12H22O11

C) the alloy steel

D) nitrogen N

Using 273.15 K as the value for Zero degree Celsius convert 45.1° C to Kelvin. 6.05 K 318 K 318.3 K 1.23 x 104 K

Write, Balance and Label the type of reaction: Potassium Hydroxide plus phosphoric acid yields potassium phosphate and water.

A mixture is made by mixing 50.0 ml of 0.200 m hcl and 50.0 ml of water. what is its ph?

The rate at which energy is transferred is called a power b kinetic energy c work d time

If I change the number of electrons in an atom, it becomes

What happens to the particles in a substance when it is cold?

What is the percent by mass of solute if 14.60g 74.95g of water?

7 An atom that has 13 protons and 15 neutrons is an isotope of the element (1) nickel (3) aluminum (2) silicon (4) phosphorus

The graph below shows how solubility changes with temperature. What is the solubility of Na2HAsO4 at 60°C? 20 g/100 mL of water 46 g/100 mL of water 65 g/100 mL of water 70 g/100 mL of water

Which statement regarding water is true? Energy must be given off in order to break down the crystal lattice of ice to a liquid. Hydrogen bonds are stronger than covalent bonds. Liquid water is less dense than solid water.