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.

a scientist has 0.46 mL of a solution. how would she convert this volume to microliters?

Nuts on yo head

rock the answers rock

To calculate the number of nanometers in 8.1 cm, you can use dimensional analysis. In dimensional analysis, you multiply the given value by a conversion factor that cancels out the unwanted units and leaves you with the desired units.

1) To convert cm to nm, you need to know the conversion factor. In this case, there are 1 x 10^7 nanometers in 1 centimeter. So the conversion factor is (1 x 10^7 nm/cm).

To calculate the number of nanometers in 8.1 cm:
8.1 cm x (1 x 10^7 nm/cm) = 8.1 x 10^7 nm

Therefore, there are 8.1 x 10^7 nanometers in 8.1 cm.

2) To convert pounds (lb) to grams (g), you need to know the conversion factor. There are 453.6 grams in 1 pound. So the conversion factor can be (453.6 g/1 lb) or (1 lb/453.6 g).

To calculate the equivalent of 0.35 lb in grams:
0.35 lb x (453.6 g/1 lb) = 158.76 g

Therefore, 0.35 lb is equivalent to 158.76 grams.

Remember, dimensional analysis is a simple process where you multiply the given value by a conversion factor that cancels out the unwanted units and leaves you with the desired units.