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3 years ago

Does anyone have any tips on studying the 17 bones for the test on Monday?

Chemistry

1 answer:

LUCKY_DIMON [66]3 years ago

7 0

Whenever I have tests like these, I make a quizlet with each part zoomed in and then answer it that way.

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The Answer is False

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3 years ago

What is the energy required to go from a solid to a liquid called?

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Answer:

C. The thermal energy of a substance.

Explanation:

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3 years ago

Identify the environmental factor that caused the change in gene expression in the previous question. *

Arlecino [84]

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2 years ago

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Iron is biologically important in the transport of oxygen by red blood cells from the lungs to the various organs of the body. I

Aneli [31]

Answer : The number of iron atoms present in each red blood cell are, $1.077\times 10^9$

Explanation :

First we have to calculate the moles of iron.

$\text{Moles of iron}=\frac{\text{Mass of iron}}{\text{Molar mass of iron}}=\frac{2.90g}{55.85g/mole}=0.0519moles$

Now we have to calculate the number of iron atoms.

As, 1 mole of iron contains $6.022\times 10^{23}$ number of iron atoms

So, 0.0519 mole of iron contains $0.0519\times 6.022\times 10^{23}=3.125\times 10^{22}$ number of iron atoms

Now we have to calculate the number of iron atoms are present in each red blood cell.

Number of iron atoms are present in each red blood cell = $\frac{\text{Number of iron atoms}}{\text{Total number of red blood cells}}$

Number of iron atoms are present in each red blood cell = $\frac{3.125\times 10^{22}}{2.90\times 10^{13}}$

Number of iron atoms are present in each red blood cell = $1.077\times 10^9$

Therefore, the number of iron atoms present in each red blood cell are, $1.077\times 10^9$

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3 years ago

Which element is a liquid at STP?<br> (1) bromine (3) francium<br> (2) cesium (4) iodine

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3 years ago

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