Posted by **john** on Saturday, February 23, 2008 at 10:52pm.

what is the mass in grams?

a) 3.011 x 10^23 atoms F

b)1.50 x 10^23 atoms Mg

c)4.50 x 10^12 atoms Cl

d)8.42 x 10^18 atoms Br

e) 25 atoms w

f) 1 atom Au

can you please explain a and b to me then i'll come back later and see if i did the rest right? Thanks in advance

it needs to be in scientific notation i think.

- chemistry -
**DrBob222**, Saturday, February 23, 2008 at 11:56pm
1 mol of anything contains 6.02 x 10^23 of those anythings; therefore, 1 mol of F atoms will contain 6.02 x 10^23 atoms of F. And it will have a mass of 19.0 grams (Look up the atomic mass of F on the periodic table.) So,

3.011 x 10^23 atoms x (1 mol atoms/6.02 x 10^23 atoms) x (19.0 g F atoms/1 mol F atoms) = ?? grams F. Note how the units cancel to give grams at the end.

b,c,d are done the same way.

- chemistry -
**raygene**, Thursday, January 31, 2013 at 5:15pm
8.42x10^18

## Answer this Question

## Related Questions

- chemistry - what is the mass in grams? a) 3.011 x 10^23 atoms F b)1.50 x 10^23 ...
- chemistry - what is the mass in grams? a) 3.011 x 10^23 atoms F b)1.50 x 10^23 ...
- Chemistry - If a sample of Co2(CO)8 is found to contain 6*10^-2 mol of C atoms, ...
- chemistry - Calculate the mass, in grams, of each of the following. a) 1.2×10^23...
- chemistry - How many atoms are in 3.14 mol of methane (CH4)? A. 7.56 x 1023 ...
- chemistry - calculate number of atoms in 4.67 mol of Ca(NO3)2 I got: 2.81 X 10^...
- Chem - Superscript 15 How many moles of Pb is 9.3 X 1015 atoms of pb? 1 mol of ...
- chemistry - Calculate the mass, in kg, of each sample.9.62×1026 cadmium atoms. -...
- Science - How many atoms of aluminum can be produced by the decomposition of 47....
- chemistry - How many atoms are in 1.14 mol of propane (C3H8)? A. 7.55 x 1023 ...