Answer:
Molarity = 0.24 mol/L
Explanation:
Given data:
Mass of NaNO3 = 25.4 g
Volume of solution = 1250 mL
Molarity = ?
Solution:
Molarity of solution is equal to the number of moles of solute divided by volume of solution in litter.
Formula:
Molarity = number of moles / volume in L
First of all we will convert the volume in litter.
1 L = 1000 mL
1250 / 1000 = 1.25 L
Now we calculate the moles of NaNO3 in present in 25.4 g.
Number of moles = mass / molar mass
Molar mass of NaNO3 = (23 + 14+ 16×3) = 85 g/mol
Number of moles = 25.4 g / 85 g/mol
Number of moles = 0.299 mol
Now we will calculate the molarity of solution
Molarity = number of moles / volume in L
Molarity = 0.299 mol / 1.25 L
Molarity = 0.24 mol/L
Answer:
14.3 mL
Explanation:
Assume the student used 0.113 g ascorbic acid and 0.0900 mol·L⁻¹ NaOH.
1. Balanced chemical equation.
The formula of ascorbic acid is H₂C₆H₆O₆ (MM = 176.12 g/mol).
However, for the balanced equation, let's write it as H₂A.
2. Moles of ascorbic acid
3. Moles of NaOH
The molar ratio is 2 mmol NaOH:1 mmol H₂A.
4. Volume of NaOH
They are now called genes.
1. <span>It helps to maintain cell shape. It holds organelles in place, and for some cells, it enables cell movement.
</span><span><span>2.Suspending cell organelles.
</span><span>3.pushing against the plasma membrane to help the cell keep its shape.
</span><span>4.providing a site for many of the biochemical reactions of the cell.
Here are 4. Pick your favorite</span></span>
Answer:
If this is multiple choice it would be: 1. Close in size, and 2. They are about the same distance from the sun.. Hopefully these will help.