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The mass of one oxygen molecule is 5.3x10-23 gram. Find the mass of 20,000 molecules of oxygen. Express the answer in scientific notation

Respuesta :

AL2006

(5.3 x 10⁻²³ gram/molecule) x (20,000 molecule)

= (5.3 x 10⁻²³ x 2 x 10⁴) gram

= (10.6 x 10⁻²³⁺⁴) gram

= (1.06 x 10⁻²³⁺⁵) gram

= 1.06 x 10⁻¹⁸ gram
aachen

Answer:

The mass of 20,000 oxygen molecules is [tex]1.06\times 10^{-18}\ grams[/tex]

Step-by-step explanation:

Given that,

Mass of one oxygen molecule, [tex]m=5.3\times 10^{-23}\ g[/tex]

We need to find the mass of 20,000 molecules of oxygen. It can be calculated using unitary method. Here, we can multiply 20,000 molecules  by the mass of one oxygen molecule.

[tex]m(20,000\ molecules)=5.3\times 10^{-23}\ g\times 20000[/tex]

[tex]m=1.06\times 10^{-18}\ grams[/tex]

Hence, this is the required solution.