What is the change in enthalpy of the first reaction below, given the enthalpies of the other two reactions?
2C(s) +0,(8) 200(g)
C(s) +0,(g) - CO2(g) AH°-394 kJ/mol
CO(s) +0,() CO2(g) AH° = -283 kJ/mol

Which statement best explains the relationship between an area is geography and the temperature of its surface water

Gusing the milligrams of ascorbic acid you entered above, the ratio of total sample volume to aliquot volume, and the total milligrams of the vitamin c tablet that you dissolved, calculate the mass of ascorbic acid in the vitamin c tablet for each trial. do this by scaling up to find the amount (mg) of ascorbic acid in your 250 ml flask. enter your calculated mass of ascorbic acid in the vitamin c tablet, for each trial. be sure to enter your calculated mass in the corresponding order that you entered your milligrams of ascorbic acid. the milligrams of ascorbic acid you entered for entry #1 previously should correspond to the mass of ascorbic acid that you enter for entry #1 here.

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?