Ground water is:

O stored in porous soil and rock

o part of the nitrogen cycle

O reduced by respiration

O unavailable to plants

The mass spectrum of an organic compound shows the relative abundances of m to be 85.03% and m 1 to be 21.15%. assuming the peaks are caused by 12c and 13c isotopes, determine the number of carbon atoms in the compound. natural abundances: 12c is 98.

What is the charge on the ion formed by aluminum?

What are acids and bases?

If a solution containing 18.0 g of a substance reacts by first-order kinetics, how many grams remain after three half-lives?

Identify the spectator ions in the following complete ionic equation. Ba2 + (aq) + 2I - (aq) + 2Na + (aq) + SO2-4 (aq) →BaSO4 (s) + 2I - (aq) + 2Na + (aq)

What is the total number of protons in the nucleus of an atom of potassium-42? (1) 15 (3) 39 (2) 19 (4) 42

What happens to the equilibrium when the pressure is increased? It favors formation of products. It does not change. It favors formation of reactants. It is conserved.

After 2.0s, Isabela. was riding her bicycle at 3.0m/s on a straight path. After 5.0s she was moving 5.4m/s. What was her acceleration?

Becomes caramel. He pushes astick into the bottom of the acole. Then he dipstip apple in the caramel Which of the following actions is achemical change? melting sugar in the pan turning sugar into caramel putting the stick into the apple

Period # for hydrogen