0.71 grams of cu equals how many moles

Hey there!

atomic mass Cu =  63.546 amu so in grams : 63.546 g

1 mole Cu 63.546 g

Number of moles = mass of solute / molar mass

Number of moles = 0.71 / 63.546

number of moles = 0.01117 moles of Cu

0.011

Explanation:

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.