Topic: What is the mass of 4.35 x 10^-2 mol of ZnCl2? (Read 14475 times)

Maverick · « **on:** March 01, 2011, 08:58:41 PM »

ok so first i found the molar mass of ZnCl2 which is 136.3 g/mol and then just multiplied 4.35 x 10^-2 * 136.3 and got 5.93 g. did i do it right?

Maverick · « **Reply #1 on:** March 01, 2011, 09:04:02 PM »

also how would u solve something like this 3.40 x 10^22 atoms He i kno its not that hard but i kno im screwing it up somewhere

DrCMS · « **Reply #2 on:** March 01, 2011, 09:07:49 PM »

The first one is correct. For the 2nd one you need to convert 3.40 x 10²² into moles using Avogadro's number and then follow the same method used in the first one.

opti384 · « **Reply #3 on:** March 01, 2011, 09:09:29 PM »

Yes. Multiply 4.35 x 10^-2 to the molar mass.

Maverick · « **Reply #4 on:** March 01, 2011, 09:59:11 PM »

tyvm for replies guys

Maverick · « **Reply #5 on:** March 01, 2011, 10:13:46 PM »

so for second one u would proceed as follows: 3.40 x 10^22 / 6.02 x 10^23 = .565 mol
then u do .565 mol x 4.003 g/mol to get 2.61 g correct?

rabolisk · « **Reply #6 on:** March 01, 2011, 10:57:52 PM »

.565 mol x 4.003 g/mol is not 2.61 g.

Maverick · « **Reply #7 on:** March 01, 2011, 11:24:22 PM »

Quote from: rabolisk on March 01, 2011, 10:57:52 PM

.565 mol x 4.003 g/mol is not 2.61 g.

its 2.26 g mistyped cuz i was on my fone

Topic: What is the mass of 4.35 x 10^-2 mol of ZnCl2? (Read 14475 times)

Maverick

What is the mass of 4.35 x 10^-2 mol of ZnCl2?

Maverick

Re: What is the mass of 4.35 x 10^-2 mol of ZnCl2?

DrCMS

Re: What is the mass of 4.35 x 10^-2 mol of ZnCl2?

opti384

Re: What is the mass of 4.35 x 10^-2 mol of ZnCl2?

Maverick

Re: What is the mass of 4.35 x 10^-2 mol of ZnCl2?

Maverick

Re: What is the mass of 4.35 x 10^-2 mol of ZnCl2?

rabolisk

Re: What is the mass of 4.35 x 10^-2 mol of ZnCl2?

Maverick

Re: What is the mass of 4.35 x 10^-2 mol of ZnCl2?

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