Homework Help: Chemistry

Posted by Anonymous on Sunday, October 7, 2012 at 10:56pm.

Suppose 2 grams of an unknown metal carbonate MCO3 is reacted with excess HCl and 0.88 grams of CO2 are produced. What is the atomic mass (molar mass) of the unknown metal M? What element is it?

Chemistry - DrBob222, Sunday, October 7, 2012 at 11:56pm
MCO3 ==> MO + CO2
0.88g CO2 = how many mols CO2? That will be 0.88/44 = 0.02 mols.
The equation tells you that mols MCO3 = 0.02 also.
Then mol = grams/molar mass You know g and you know mol, calculate molar mass. Then You know MCO3 molar mass. You know C and O. solve for atomic mass M. Finally identify M from the periodic table.

Answer this Question

Related Questions

Chemistry - In an experiment 1.015 g of a metal carbonate, containing an unknown...
Chemistry 1 - Sodium carbonate reacts with a solution of HCl solution with the ...
Chemistry - When calcium carbonate is added to hydrochloric acid, calcium ...
chemistry - 1)The reaction of methane and oxygen yields carbon dioxide gas and ...
chem help - The reaction of methane and oxygen yields carbon dioxide gas and ...
Chemistry - Assume that a reaction occurs in which unknown substances R and S ...
Chemistry - a 110 g solid sample that is a mixture of CaCO3 and CaCl2 is reacted...
Chemistry - For the reaction: V2O5 + 6HCl --> 2VOCl3 + 3H2O If 13.65g of ...
chemistry - Calcium carbonate reacts with hydrochloric acid according to the ...
Chemistry - I did a back titration with an unknown carbonate and using the ...

For Further Reading

First Name:
School Subject:
Answer: