Which of the following is an example of chemical weathering?

A. Frost wedging

B, Animal activity

C. Plant growth

D. Acid rain

What was the main reason the Federalists wanted to replace the Articles of Confederation? (1) The president did not have the power to veto legislation. (2) The legislative branch enacted an unfair tax program.

The pH of a solution is 2.0. Which statement is correct? Useful formulas include [H30+1 = 1070F, FOH-7-10 + 0H, PH+pOH = 14, and [H30 [0H-] - 10-14

Whats the definition of organic chemistry

If a patient/'s blood pressure is 145 over 65 mmHg, what is it in atmospheres (atm)

You have the equations: 2H2O (l) →2H2 (g) + O2 (g), △H=572 kJ 2N2 (g) + 3H2 (g) →2NH3 (g), △H=-138 kJ 2NO2 (g) + 7H2 (g) →2NH3 (g) + 4H2O (l), △H=-1.18*103 kJ 2NO2 (g) →2N2 (g) + 2O2 (g), △H=□ What is the missing △H? -1.38*103 kJ +99.0 kJ +1.

A mixture of He He, N 2 N2, and Ar Ar has a pressure of 22.1 22.1 atm at 28.0 28.0 °C. If the partial pressure of He He is 2475 2475 torr and that of Ar Ar is 1049 1049 mm Hg, what is the partial pressure of N 2 N2?

Oceans make the temperaturs of nearby land more extreme ... True or false

The Greek letter D stands for A. Mass of B. Rate of C. Change in D. Heat stored in

14. Two or more substances that are together but do not combine to form a new, pure substance.

A solution of a compound with a known extinction coefficient of 23,100 M-1cm-1 has an absorbance of 0.735 in a 1.30cm path length, what is the concentration of the solution