1. 0.042
2. 0.042
3. 0.0042
I have no idea how that works. i used cymath . com to get the answer.
Nice multiplication and minus signs by the way.
The diameter of a hydrogen atom is about 5×10^-11 meter. Suppose 8.4×10^8 hydrogen atoms were arranged side by side in a straight line. Multiply these numbers to find the length of this line of atoms. What is the length in scientific notation?
42×10^−3 meter
0.042 meter
4.2×10^−2 meter
4.2×10^−3 meter
2 answers
A hydrogen atom's diameter in metres is
5.3×10
−11
m
.
How many hydrogen atoms could fit in a line of
0.047metres?
5.3×10
−11
m
.
How many hydrogen atoms could fit in a line of
0.047metres?
3 answers