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October 21, 2014

Homework Help: AP Chemistry

Posted by Jake on Sunday, September 23, 2007 at 1:08pm.

My objective is to find the molar mass of a gas.

Is this the correct balanced equation for magnesium ribbon reacting with hydrochloric acid to form hydrogen gas?


2Mg (s) + 2HCL (l) ----> H2 (g) + 2MgCl (aq)

Also, I'm required to find the mass of the magnesium ribbon in grams and the moles of the hydrogen gas collected.

Is it correct to multiply the mass per meter (1.702 g/m) by the m of ribbon in order to get the mass?

then once i have the grams do i change it to moles of Mg? how do i get moles of h2? use the mole ratio of the equation?

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