The number of in an atom’s nucleus is equal to its number?

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins. co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)