$\overline{)\frac{{\mathbf{V}}_{\mathbf{1}}}{{\mathbf{n}}_{\mathbf{1}}}{\mathbf{=}}\frac{{\mathbf{V}}_{\mathbf{2}}}{{\mathbf{n}}_{\mathbf{2}}}}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\mathbf{(}\frac{{\mathbf{V}}_{\mathbf{1}}}{{\mathbf{n}}_{\mathbf{1}}}\mathbf{=}\frac{{\mathbf{V}}_{\mathbf{2}}}{\overline{){\mathbf{n}}_{\mathbf{2}}}}\mathbf{)}\overline{)\left({{n}}_{{2}}\right)}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\overline{){{\mathbf{V}}}_{{\mathbf{2}}}{\mathbf{=}}\mathbf{\left(}\frac{{\mathbf{V}}_{\mathbf{1}}}{{\mathbf{n}}_{\mathbf{1}}}\mathbf{\right)}{{\mathbf{n}}}_{{\mathbf{2}}}}$

A cylinder with a moveable piston contains 0.551 mol of gas and has a volume of 251 mL .

What will its volume be if an additional 0.276 mol of gas is added to the cylinder? (Assume constant temperature and pressure.)

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