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Lynna [10]
2 years ago
10

How much does the Earth weigh?​

Chemistry
2 answers:
ELEN [110]2 years ago
6 0

5.972 × 10^24 kg

hope it helps

skad [1K]2 years ago
4 0

Answer:

5.972 × 10^24 kg

hope this helps

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According to the oxygen-hemoglobin dissociation curve, PO2 in the lungs of 100 mm Hg results in Hb being 98% saturated. At high
Ad libitum [116K]

Answer:

Hb would be 78.4% saturated.

Explanation:

This problem can be solved by using simple unitary method.

At 100 mm Hg pressure of oxygen, Hb is saturated by 98%

So, at 1 mm Hg pressure of oxygen, Hb is saturated by \frac{98}{100}%

Hence, at 80 mm Hg pressure of oxygen, Hb is saturated by \frac{98\times 80}{100}% or 78.4%

Therefore, at 80 mm Hg pressure of oxygen in the lungs, Hb would be 78.4% saturated.

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2 years ago
in which part of the plant does photosynthesis take place A. the roots B. The leaves C. the flowers?​
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Explanation:

3 0
3 years ago
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A strontium-90 atom that has a lost two electrons has __________ protons, __________ neutrons, and __________ electrons.
MAXImum [283]
<span><em>Answer:</em>
A strontium-90 atom that has a lost two electrons has <u>38</u> protons, <u>52</u> neutrons, and <u>36</u> electrons.

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If the element is in neutral state,
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Mass number = number of protons + number of neutrons.

The given mass number is 90. Hence, number of neutrons should be 90 - 38 = 52.</span>
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2 years ago
What grey rock that has crinoids and brachiopods reacts to hydrochloric acid?
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The rock is limestone, I hope this helps!!
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3 years ago
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Explanation:

Yes, a chemical reaction can happen with only one substance.

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An example of radioactive decay is attached in the image below;

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3 years ago
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