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Ksju [112]
3 years ago
9

Which element is always found in impure form

Chemistry
2 answers:
Bezzdna [24]3 years ago
7 0
C hydroyen
its aht plants breath

miskamm [114]3 years ago
7 0
C. HYDROGEN is the answer
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What is the mass (in grams) of 169 mole of CF4
Sergeu [11.5K]
The answer will depend on the number of significant figures you want in your answer, so I can't give you a solid answer, but the process is still the same: you convert from grams to moles by using the molar mass.

You can calculate the molar mass of carbon tetrafluoride from the periodic table, by adding the molar mass of 1 atom of C and 4 atoms of F. Round the total molar mass to the appropriate number and multiply 169 moles by the molar mass you just calculated.

Hope this helps!
3 0
3 years ago
Express as an ordinary number.<br><br> 3.85 x 10 -3 =<br><br> 0.00385<br> 3,850<br> 0.385
Rzqust [24]
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6 0
3 years ago
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A children's liquid medicine contains 100mg of active ingredient in 5 mL. If a child should receive 200 mg of the active ingredi
GaryK [48]
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8 0
2 years ago
A student investigated how much solid was dissolved in sea water.
SashulF [63]

Answer:

weighing balance/analytical balance

Graduated cylinder/buret

Explanation:

The mass of the evaporating basin could be measured using a weighing balance or an analytical balance. Both are classified as weighing scales but the analytical balance can measure the mass of objects up to 4 decimal places, thus, providing better accuracy in measurement than ordinary weighing balance that can only measure up to 2 decimal places.

In order to measure 50 cm3 of the sea water, a graduated cylinder or a buret can be used. Both equipment can measure up to the same decimal places and, thus, have virtually the same accuracy.

3 0
2 years ago
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