Tia has a sample of pure gold (au). she weighed the sample and the result was 62.4 grams. tia wants to determine the number of atoms in the sample. calculate the number of atoms in 62.4 g of pure gold.

they are made of gases.

they have a spherical shape.

they make energy through fusion.

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.