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Alexandra [31]
4 years ago
6

HELP ASAP!!!! (15 POINTS)Consider the physical properties (such as size, magnetism, ability to boil or dissolve in water) of eac

h sand, gravel, salt and iron filings. How would you go about separating the components of a mixture of them?
Chemistry
1 answer:
fredd [130]4 years ago
3 0
You can use a sand sifter or filter
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What part of the atom do the different 35 and 37 represent?
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4 years ago
What is the percent by mass of oxygen in carbon dioxide (CO2)? Use mc008-1. Jpg. 27. 29% 57. 12% 72. 71% 79. 99%.
castortr0y [4]

The percent by mass of oxygen in carbon dioxide (CO_2) is 72.71%.

<u>Scientific data:</u>

  • Molar mass of oxygen gas = 32 g/mol.
  • Molar mass of carbon = 12 g/mol.

To calculate the percent by mass of oxygen in carbon dioxide (CO_2):

First of all, we would calculate the molar mass of carbon dioxide (CO_2);

CO_2 = 12 +(16\times 2)\\\\CO_2 = 12 +32\\\\CO_2 = 44\;g/mol

For the percent by mass of oxygen:

O_2 = \frac{Mass\; of \;O_2}{Mass\; of \;CO_2} \times 100

Substituting the parameters into the formula, we have;

O_2 = \frac{32}{44} \times 100\\\\O_2 = 0.7271 \times 100

Percent mass of oxygen = 72.71%

Read more on percent mass here: brainly.com/question/15182450

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3 years ago
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