Length = 10cm
width = 5cm
mass = 300g
height = 2cm
volume =?
density =? Pls help

volume=100

density=100

Explanation:

to get volume you multiply length and width to get area then multiply height=100

to get density you divide mass by volume

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.