What is the molar mass of mn(clo3)2? explain how you calculated this value. me!

Molar mass is the total mass of a molecule. Every element has a specific weight, found in the bottom of it's box on the periodic table. In general you will want to round those values to the nearest whole number or nearest decimal - for example oxygen is 15.999 g/mole, but the standard weight used for it is 16g. 

Let's start with something simple - CO2. 
To find the weight of CO2, identify the weights of the elements that make it up, C & O. On the table, C is 12g/mole and O is 16g/mole. However, you have 2 oxygen atoms - so now you have to multiply 16x2, so oxygen weighs 32g. 
32+12 = 44g/mole. Hence, CO2 has a molar mass of 44g. 

Same thing with Mn(ClO3)2. Identify the elements -- you have Mn, Cl, and O. 
How many of each do you have? Mn = 1, but you have 2 groups of ClO3, because it's in parenthesis. Therefore, you have 2 Cl, but 6 O. 
Now find their weights and list them. 
Mn = 55g/mole 
Cl = 35.4g/mole x 2 --> 70.8 
O = 16g/mole x 6 --> 96 

Now just add it up! 
55+96+70.8! 



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