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2 years ago

Please help!! i will give brainiest

Chemistry

1 answer:

Sunny_sXe [5.5K]2 years ago

7 0

Answer:

Explanation:

ok bacha i will give u brainiest

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Inventos de la física que estén entre los 800 años y 1500<br> Ocupó 15 porfa

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Creados entre los 800 y los 1500 o inventos que llevan de creación ese tiempo,puedes ser la pregunta un poco específica?

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2 years ago

A sample of lead has a density of 11.3 g/cm3 and a mass of 123 grams, what is the volume of the sample?

SVEN [57.7K]

Answer:

The answer is

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

$volume = \frac{mass}{density} \\$

From the question

mass = 123 g

density = 11.3 g/cm³

The volume is

$volume = \frac{123}{11.3} \\ = 11.18181818...$

We have the final answer as

Hope this helps you

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3 years ago

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3 years ago

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3 years ago

Read 2 more answers

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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2 years ago