$m = 34g = 34 \times {10^{ - 3}}kg$$V = 0/02lit = 2 \times {10^{ - 5}}{m^3}$$\rho  = \frac{m}{V} = \frac{{34 \times {{10}^{ - 3}}}}{{2 \times {{10}^{ - 5}}}} = 1700\frac{{kg}}{{{m^3}}}$