A water plant in the solution was lace in sunny window
Molarity = moles/Volume in Liters
<span>We have volume, we need moles
</span>molar mass of NaF = 42
<span>moles = mass/molar mass = 12.9 g/ 42 = 0.307 moles </span>
<span>Molarity =0.307 moles / 0.750 L </span>
<span>Molarity = 0.41M</span>
Answer:
0.087 moles of water
Explanation:
Given data:
Number of molecules of water = 5.24×10²² molecules
Number of moles of water = ?
Solution:
The given problem will solve by using Avogadro number.
1 mole = 6.022 × 10²³ molecules of water
5.24×10²² molecules × 1 mol / 6.022 × 10²³ molecules
0.87×10⁻¹ mol
0.087 mol
Avogadro number:
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
The answer is C, Extinction.
If there was no diversity then a single sickness could wipe out a whole population, but if the population was more varied theres a higher chance someone is more resistant to the sickness and could carry on the species life
Remember the units of M (molarity) is the number of moles per liter (mol/L).
First, convert mL to L:
500. mL * (1 L / 1000 mL) = 0.500 L
Convert Molarity into moles by multiplying by the volume:
6.00 (moles/Liter) * (0.500 Liters) = 3.00 moles NaOH
Finally, multiply the number of moles of NaOH by the molar mass:
Molar mass = (22.99 g/mol) + (16.00 g/mol) + (1.01 g/mol) = 40.00 g/mol
3.00 moles * (40.00 grams/mole) = 1.20 * 10^2 grams
