One mole of a chemical element contains approximately 6.02 × 1023 atoms. how many atoms are present in 4.6 × 104 moles of oxygen? represent the answer in scientific notation. round so the first factor goes to the hundredths place.
a.
2.77 × 10^27 atoms
b.
2.77 × 10^28 atoms
c.
27.7 × 10^27 atoms
d.
27.7 × 10^28 atoms

B. 2.77 · 10^28

Step-by-step explanation:

The total number of atoms is ...

(6.02·10^23 atoms/mol)·(4.6·10^4 mol) = (6.02·4.6)·10^(23+4) atoms

≈ 27.7·10^27 atoms

≈ 2.77·10^28 atoms . . . . . . put in scientific notation form

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Scientific notation has one non-zero digit to the left of the decimal point and the exponent adjusted accordingly.

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Your calculator can help you figure this out. If necessary, put the display into scientific notation mode. (For numbers this size, it is usually not necessary.)

B.  

Step-by-step explanation:

Given : One mole  of a chemical element contains approximately

Then , the number of atoms present in is given by :-

Using exponents property:

50

step-by-step explanation:

a. she will receive a refund of $278.

step-by-step explanation: