The best and most correct answer among the choices provided by your question is the third choice or letter D.
<span>Solids, liquids, gases and plasma are all made of atoms.</span>
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
Answer:
162g
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
2C2H6 + 7O2 —> 4CO2 + 6H2O
Next, we shall determine the number of mole of water, H2O produced by the reaction of 3 moles of C2H6.
This can be obtained as follow:
From the balanced equation above,
2 moles of C2H6 reacted to produce 6 moles of H2O.
Therefore, 3 moles of C2H6 will react to produce = (3 x 6)/2 = 9 moles of H2O.
Therefore, 9 moles of H2O is produced from the reaction.
Finally, we shall convert 9 moles of H2O to grams.
This can be done as shown below:
Molar mass of H2O = (2x1) + 16 = 18g/mol
Mole of H2O = 9 moles
Mass of H2O =..?
Mole = mass / molar mass
9 = mass of H2O /18
Cross multiply
Mass of H2O = 9 x 18
Mass of H2O = 162g
Therefore, 162g of H2O were produced from 3 moles of C2H6.
Answer:
30.5 g of estrogen
Explanation:
Lowering vapor pressure formula → P° - P' = P° . Xm
P° → Vapor pressure of pure solvent → 54.68 mmHg
P' → Vapor pressure of solution → 53.46 mmHg
54.68 mmHg - 53.46 mmHg = 54.68 mmHg . Xm
0.0223 = Xm → This is the mole fraction for solute
Moles of solute / Total moles
Total moles = Moles of solute + Moles of solvent
Let's determine the moles of solvent → 228 g / 46.07 g/mol = 4.95 moles
Let's determine the moles of solute
Moles of solute / Moles of solute + 4.95 = 0.0223
Moles of solute = 0.0223 . Moles of solute + 0.110
0.9777 moles of solute = 0.110
Moles of solute = 0.110 / 0.9777 → 0.112
Now we can convert the moles to mass to finish the excersise:
0.112 mol . 272.4 g/mol = 30.5 g
