If 3 moles of a compound use 12 J of energy in a reaction, what is the A
Hreaction
in kJ/mol?
O A. -0.004 kJ/mol
B. 4 kJ/mol
C. 0.004 kJ/mol
D. -4 kJ/mol

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

Suppose you have designed a new thermometer called the x thermometer. on the x scale the boiling point of water is 129 ? x and the freezing point of water is 13 ? x. part a at what temperature are the readings on the fahrenheit and x thermometers the same?

The molar mass of iron(fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?