Answer:
I can answer some of these.
Explanation:
Q 36. B. Is false.
Q. 37 C. is false.
Q. 28.
All the numbers are 1.
Answer:
Molarity of a solution = 1 mol / L
Explanation:
Given:
Amount of NaOH =20 g
Amount of water = 0.50 l
Find:
Molarity of a solution
Computation:
1 mol of NaOH = 40 g
So,
Moles of NaOH = 20 / 40 g = 0.50 mol NaOH
Molarity of a solution = moles of solute / Liters of solution
Molarity of a solution = 0.50 / 0.50
Molarity of a solution = 1 mol / L
Answer:
liquids: water and soda
gases: oxygen and carbon dioxide
solid: a chair and a notebook
Answer:
18.45 g of C
Explanation:
This is a problem of rules of three:
1 mol of C₃H₈ contains 3 moles of C and 8 moles of H
If 8 moles of H are contained in 1 mol of propane
4.10 moles of H are contained in (4.1 . 1) /8 = 0.5125 moles
Now, If 1 mol of propane contains 3 moles of C
0.5125 moles of propane may contain (0.5125 . 3) / 1 = 1.5375 moles of C
Let's convert the moles to mass:
1.5375 mol . 12 g /mol = 18.45 g
