Posted by **Bryan** on Thursday, January 25, 2007 at 3:41pm.

I Have Two Questions

1)How would you calculate the number of nanometers in 8.1 cm?

2)What is the equivalent of 0.35 lb in grams?

You need to learn to do deimensional analysis. It's easy.

0.35 lb to grams

We know there are 453.6 g in a lb. We take the given (0.35 lb) and multiply by a conversion factor. The factor is either 453.6 g/1 lb or 1 lb/453.6 g.

0.35 lb x factor = ??

Now all we need to do is determine which of the two factors to use? That's easy, too. We arrange the factor so the unit we don't want to keep (lbs in this case) cancels and grams is what is left.

0.35 lb x (453.6 g/lb) = ?? grams.

Note that we place lb of the factor in the denominator so that it will cancel with the given (lb in this case) and it leave g from the factor to go with the numerical value of the answer.

There are 1 x 10^7 nm in 1 cm.

given (8.1 cm) x factor.

8.1 cm x (1 x 10^7 nm/cm) = ??

Again, the cm unit cancels (that's the one we don't want to keep) but we leave the nm of the factor, so the answer is 8.1 x 10^7 nm.

This is a simple process and we need not make it complicated.

## Answer This Question

## Related Questions

- Chemistry/stoichiometry - For the reaction shown, calculate how many moles of ...
- Chemistry - Posted by Angeline on Monday, April 20, 2009 at 5:35pm. A few ...
- Chemistry - (1.00 x 10^5)NM - (3.96 x 10^3) NM = ? I think that since they're ...
- Science - How did Mendel’s approach to answering scientific questions differ ...
- Language Study - Is it wise to learn two different languages at a time? Such as ...
- General Knowledge - Is it wise to learn two different languages at a time? Such ...
- Logistics - supply chain management case analysis Dream Beauty Company ...
- chemistry - How would this problem be worked using dimensional analysis? Answer ...
- chemistry - Calculate the theoretical yield in moles of Fe(C5H7O2)3 for this ...
- Chemistry - Calculate the theoretical yield in moles of Fe(C5H7O2)3 for this ...

More Related Questions