reggie2261 reggie2261 03-04-2024 Chemistry contestada If 0.290 g of an unknown metal (designated as M) completely reacts with 8.1 mL of 0.99 M HCl, according to M(s) + 2HCl(aq) → MCl2(aq) + H2(g), calculate the molar mass of the unknown metal (keep one decimal place).