Homework Help: chemistry

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 - Calculate the mass, in grams, of each of the following. a) 1.2×...
Chemistry - What is the mass in grams of each of the following: a) 4.50 x 10^12 ...
Chemistry - If a sample of Co2(CO)8 is found to contain 6*10^-2 mol of C atoms, ...
chemistry - calculate number of atoms in 4.67 mol of Ca(NO3)2 I got: 2.81 X 10^...
Science - How many atoms of aluminum can be produced by the decomposition of 47....
CHEMISTRY - what is the symbol for chromium (II) sulfate? You mean the formula? ...
Chem - Superscript 15 How many moles of Pb is 9.3 X 1015 atoms of pb? 1 mol of ...
Chem - How many chlorine atoms are in 5.0 g of C2H3Cl3O2? What mass of C2H3Cl3O2...

For Further Reading

First Name:
School Subject:
Answer: