[SPLIT] converting mass of atom from grams to other units

[acampo]

The mass of a single copper atom is 1.055 x 10-22 g. This is the same mass as:

a. 1.055 x 10^28 ug.
b. 1.055 x 10^25 kg.
c. 1.055 x 10^16 mg.
d. 1.055 x 10^31 ng.

Which of the above is the same as 1.055 x 10-22 g?

I think it is a and d. possible?

 

[skeeter]

Thanks! seems like i was pretty close but disorganized.

I ran into another problem.

got news for you ... none of the given "choices" are correct.

m = 1.055 x 10^-22 g

note the negative exponent, which tells you this atom's mass is very small.

The mass of a single copper atom is 1.055 x 10-22 g. This is the same mass as

a. 1.055 x 10^28 ug. none of these have negative exponents
b. 1.055 x 10^25 kg.
c. 1.055 x 10^16 mg.
d. 1.055 x 10^31 ng.

which is this the same as?

I think it is a and d. possible?

 

[stapel]

a. 1.055 x 10^28 ug.
b. 1.055 x 10^25 kg.
c. 1.055 x 10^16 mg.
d. 1.055 x 10^31 ng.

Please clarify the units. I'm familiar with "kg", which is "kilograms", and "mg", which is "milligrams". But what are "ug" and "ng"?

When you reply, please include the reasoning you used to arrive at your answer.

Thank you.

Eliz.