Choose the answer among A,B,C,D to complete each of the sentences below:

His change of job has___________ him with a new challenge in life.

A.  presented

B. introduced

C. initiated

D. led

n_CuO = \(\dfrac{48}{80}\) = 0,6 mol
PTHH : CuO + H₂ ----> Cu + H₂O
1mol 1mol 1mol 1mol

0,6mol -> 0,6mol -> 0,6mol -> 0,6mol

a. m_Cu = n . M = \(0,6 * 64\)= 38,4 (g)
b. V_H2 = n . 22.4 = \(0,6 * 22,4\)= 13,44 (lít)