## anonymous 4 years ago Use the conversion factor 1amu=6.66054 x 10^-24 to answer the following questions. a) 1.674 x 10^-24 g of neutrons is how many amu? b)what is the mass in grams of one lithium atom(lithium has an atomic weight of 6.94 amu) c)6.492 x 10^-23 g of potassium is how many amu?

1. TuringTest

a)You mean$1\text{amu}=1.66054\times10^{-24}\text g$so the conversion from grams to amu will be$1.674\times10^{-24}\text g(\frac{1\text{amu}}{1.66054\times10^{-24}\text g})$

2. anonymous

so what about b and c

3. anonymous

can you help me with this one also please. Complete combustion of 8.00g of a hydrocarbon produced 25.6g of CO2 and 9.15g of H2O. What is the empirical formula of the hydrocarbon? I have to leave. I will be back. Thanks for A.

4. TuringTest

b)$\frac{6.94\text{amu}}{1\text{Li atom}}\cdot\frac{1.66054\times10^{-24}\text{g}}{1\text{amu}}$check the units to see that this gives g/Li atom

5. TuringTest

c)$?\text g\times\frac{?\text{amu}}{?\text{g}}=?\text{amu}$you should be able to figure out the numbers yourself after the last two problems

6. anonymous

ok can you help me with the other problem i posted please

7. TuringTest

I'm looking at it, but I haven't done that stuff in a while.

8. anonymous

I already told him how to answer that problem, but it looks like he only wants answers anyways.

9. TuringTest

thanks for the heads up on that

10. anonymous

what. where did you say?

11. Xishem

In the original post you made with the exact same question: http://openstudy.com/study#/updates/4f302c9de4b0fc09381ec1b6