How many grams of copper would be produced if 22.0 g of CuO react according to CuO+ H2 yield Cu+ H2O

Mass = 19.1 g

Explanation:

Given data:

Mass of CuO = 22.0 g

Mass of copper formed = ?

Solution:

Chemical equation:

CuO + H₂  → Cu + H₂O

Number of moles of CuO:

Number of moles = mass/ molar mass

Number of moles = 22.0 g/ 79.545 g/mol

Number of moles = 0.3 mol

Now we will compare the moles of CuO with Cu.

                     CuO          :            Cu

                        1             :               1

                        0.3        :            0.3

Mass of copper:

Mass = number of moles × molar mass

Mass =  0.3 mol  × 63.546 g/mol

Mass = 19.1 g

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml