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IgorC [24]
2 years ago
8

One mole of aluminum atoms has a mass of 27 grams. How many grams are in 9.0 moles of aluminum?

Chemistry
1 answer:
gizmo_the_mogwai [7]2 years ago
6 0
27*9=243 if one mole is equal to 27 grams times that by 9
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If a concentration of 10 fluorescent molecules per μm2of cell membrane is needed to visualize a cell under the microscope, how m
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Explanation : As a single egg cell has an approximately diameter of 100 μm.

We can use this formula to calculate area of the cell membrane;

A = π (100)^{2} / 4;  

We can take π as 3.14 and we get;

A = 3.14 X (100)^{2} / 4  

Soving we get;

A =  7850 μm^{2}  

Here we have to calculate the amount of dye molecules which will be needed for 10 fluorescent molecules / μm^{2}  but;

here 1 μm^{2} = 7850 μm^{2} dye molecules.

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What would a general formula of an acid always start with? ( 1 point)
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Hence the answer.

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