Determine the ph of a 0.500 m hno2 solution. ka of hno2 is 4.6 * 10-4.

a. 1.82
b. 1.67
c. 2.67
d. 0.30

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.

Find the midpoint of a segment with endpoints of 4-3i and -2+7i

If you used the method of initial rates to obtain the order for no2, predict what reaction rates you would measure in the beginning of the reaction for initial concentrations of 0.200 m, 0.100 m, & 0.050 m no2.