3 years ago

How did the ice ages affect where people settled in America

Chemistry

1 answer:

skelet666 [1.2K]3 years ago

6 0

Because the cold could freeze them, and they could get hypothermia.

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A percent composition analysis yields 46.7% nitrogen and 53.3% oxygen. What is the empirical formula for the compound

Korolek [52]

Empirical formula is the simplest ratio of whole numbers of components in a compound
calculating for 100 g of compound
N O
mass 46.7 g 53.3 g
number of moles 46.7 g / 14 g/mol 53.3 g / 16 g/mol
= 3.33 = 3.33
divide by the least number of moles
3.33/ 3.33 = 1.00 3.33/3.33 = 0
number of atoms
N - 1
O - 1
therefore empirical formula is NO

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2 years ago

Which of these molecules has the same number of shared electron pairs as unshared electron pairs? (a) hcl, (b) h2s, (c) pf3, (d)

Paul [167]

<span>H2S has 2 bonds which means that it has two shared electron pairs. It has 2 lone pairs on electrons. It's the only one where the 2 are the same.</span>

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3 years ago

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Volgvan

Answer:

Explanation:

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3 years ago

PLEASE HELP!!! 20 POINTS!!!

Sergio [31]

1. True
2. True
3. False
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An element X forms a compound XH 3 with hydrogen. Another element Y forms a compound YX 2 with X. Given that the valency of hydr

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X $H_{3}$
H has a positive 1 charge. This means that having 3H = +3<span>. This is a neutral compound so x= -3 because X+3H= 0

Y</span> $X_{2}$ is also neutral so 2X+Y= 0
we know X=-3 So, 2(-3)+Y=0
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Answer: The valency of X is -3. The valency of Y is 6

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3 years ago