Posted by **Jason ** on Monday, January 3, 2011 at 12:28am.

what is the total number of moles in 80.0 grams of C2H5Cl (gram-formula mass=64.5grams/mole)?

(1)0.806

(2)1.24

(3)2.48

(4)5.16

i appreciate any help.

- Chemistry -
**Jason **, Monday, January 3, 2011 at 12:30am
i think its 2. am i right ?

- Chemistry -
**Dr Russ**, Monday, January 3, 2011 at 12:32am
number of moles = mass/(gram formula mass)

Note - that this is an easy multiple choice to answer without using a calculator.

- Chemistry -
**Dr Russ**, Monday, January 3, 2011 at 12:38am
Agreed.

number of moles = mass/(gram formula mass)

=80 g/64.5 g mole^-1

without using a calculator, 80/64.5 must be greater than 1.0 (so not answer 1)) as numerator (80) is greater than denominator (64.5).

Similarly as the numerator (80) is less than twice denominator (64.5) the answer can't be 3) or 4) and must be 2).

## Answer This Question

## Related Questions

- Chemistry - what is the total number of moles in 80.0 grams of C2H5Cl (gram-...
- Chemistry - Posted by Angeline on Monday, April 20, 2009 at 5:35pm. A few ...
- chemistry - an unsaturated solution is made by completely dissolving 20.0 grams ...
- Chemistry - 4.12 grams of Zinc are placed in a crucible with 3.00 grams (excess...
- Chemistry - What is the molarity of the resulting saline solution when you mix 1...
- chemistry - Someone please help me with these 2 problems!! I am going nuts! How ...
- Chemistry - Can some please check my answers for the following questions? THANK ...
- chemistry - How many moles are in 13grams of C6H6. should this question be ...
- chemistry - Determine the number of bromide ions in solution when 4.23 g of ...
- CHEM MOLES !@@! - Mole Calculation Worksheet 1) How many moles are in 15 grams ...

More Related Questions