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Vesna [10]
3 years ago
15

Name four ways humans alter the water cycle and how the change impacts the water cycle

Advanced Placement (AP)
1 answer:
Tpy6a [65]3 years ago
7 0
Poison n poop make water dirty
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2 years ago
Suppose you have 61.8 grams of elemental chromium. How many grams would be the isotope chromium - 50?
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Answer:

The mass of the isotope Chromium-50 would be 2.685 grams in 61.8 grams of elemental Chromium.

Explanation:

Natural chromium (Cr) is composed of four stable isotopes: ^{50} Cr (4.345 % abundance), ^{52}Cr (83.789 % abundance), ^{53}Cr (9.501 % abundance) and ^{54}Cr (2.365 % abundance). We can obtained the total mass of the isotope Chromium-50 (m_{^{50}Cr}), measured in grams, by multiplying the mass of elemental chromium (m_{Cr}), measured in grams by percentage ratio (r), dimensionless. That is:

m_{^{50}Cr} = \frac{r}{100}\cdot m_{Cr}

If we know that r = 4.345 and m_{Cr} = 61.8\,g, then the mass of isotope Chromium-50 would be:

m_{^{50}Cr} = \frac{4.345}{100}\cdot (61.8\,g)

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The mass of the isotope Chromium-50 would be 2.685 grams in 61.8 grams of elemental Chromium.

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