A 7.60 L balloon contains 2.67 moles of oxygen gas. Some oxygen is released, so the only 1.78 moles of oxygen remain in the balloon. What is the new volume of the balloon?

V₂ =  5.07 L

Explanation:

Given data:

Initial volume of balloon =  7.60 L

Initial number of moles of oxygen = 2.67 mol

Final number of moles of oxygen = 1.78 mol

Final volume of balloon = ?

Solution:

According to the Avogadro law,

Number of moles of gas and volume are directly proportional to each other at constant temperature and constant pressure.

Mathematical relationship:

V₁/n₁ = V₂/n₂

No we will put the values.

7.60 L / 2.67 mol = V₂/1.78 mol

V₂ = 7.60 L× 1.78 mol/ 2.67 mol

V₂ = 13.528 L. mol /2.67 mol

V₂ =  5.07 L

n has four pairs of electrons in the valence shell, electrons repel one another ,n has 7 protons in its nucleus, and since n has 7 protons, it must fill the second shell, giving it 4 pairs of electrons. the electrons form 3 bonds and 1 lone pair of electrons. each pair of electrons repels the other pairs, so they are equally far apart.

so all of the above

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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