a) \(m_{CuSO_4}=\dfrac{mdd\cdot C\%}{100\%}=\dfrac{300\cdot16\%}{100\%}=48\left(g\right)\)
b) \(m_{HCl}=\dfrac{mdd\cdot C\%}{100\%}=\dfrac{500\cdot7,3\%}{100\%}=36,5\left(g\right)\)
`a) m_(ct)= (C% . m_(dd))/100=(16.300)/100=48(g)`
`b) m_(ct)= (C% . m_(dd))/100=(7,3.500)/100=36,5(g)`