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VMariaS [17]
3 years ago
13

Please could you help me with this question

Chemistry
2 answers:
Serga [27]3 years ago
8 0
The one on the left is pure because it is made out of one single material. The one on the right is a mixture because it is made out of multiple materials
matrenka [14]3 years ago
4 0

Answer:

first one pure

second one mixture..

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geniusboy [140]
No' of molecules divide by avogadro number , 6×6.023×10^23 so (2.2×10^22)÷(6.023×10^23)
= 0.03653 moles
moles × Molar mass = mass
n×Mr=m
0.03653×40 = 1.46 grams
8 0
3 years ago
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Which statement describes a reason to consider air a mixture? A) The major constituents of air are gaseous elements. B) The comp
umka21 [38]

The correct answer is - A) The major constituents of air are gaseous elements.

With the statement ''the major constituents of air are gaseous elements'' we can easily conclude that the air is a mixture. The reason for that is that we have a plural usage of the word element, elements, which mean that there are multiple elements that make up the air.

The air is indeed predominantly a mixture of gaseous elements. The most abundant gas in the air being the nitrogen with 78.9%, oxygen with 20.95%, argon 0.93%, and carbon dioxide 0.04%, with lesser amounts of other gases also be present in it. The water vapor is also present in the air, though it is variable, being around 1% at sea level, but only 0.4% over the entire atmosphere.

3 0
3 years ago
If the formula mass of one molecule is X amu, the molar mass is X g/mol. Group of answer choices True False
Irina-Kira [14]

yes

Explanation:

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8 0
2 years ago
What is the last step in the scientific method?
yawa3891 [41]

Answer:

D. Communication of results

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Which contains the greatest number of moles of oxygen atoms: 1 mol of ethanol (c2h5oh), 1 mol of formic acid (hco2h), or 1 mol o
Darina [25.2K]
1 mol of formic acid is correct. There are two oxygen atoms in formic acid, compared to just one for the other molecules.
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