A 55.00g sample of copper is heated to 789.0 C and placed in 200.00ml sample of water. Copper has a specific heat capacity of 0.389 J/gC and a molar mass of 63.55 g/mol. Water has a specific heat of 4.184 J/gC and a density of 1.00g/ml. Determine the deltaH per mole of copper.

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

just did the assignment and the answer was #1 +2 n