Answer:
See explanation
Explanation:
The equation of the reaction is;
C3H8 + 5O2 ----> 3CO2 + 4H2O
Number of moles of C3H8 = 132.33g/44g/mol = 3 moles
1 mole of C3H8 yields 3 moles of CO2
3 moles of C3H8 yields 3 × 3/1 = 9 moles of CO2
Number of moles of oxygen = 384.00 g/32 g/mol = 12 moles
5 moles of oxygen yields 3 moles of CO2
12 moles of oxygen yields 12 × 3/5 = 7.2 moles of CO2
Hence C3H8 is the limiting reactant.
Mass of CO2 produced = 9 moles of CO2 × 44 g/mol = 396 g of CO2
1 moles of C3H8 yields 4 moles of water
3 moles of C3H8 yields 3 × 4/1 = 12 moles of water
Mass of water = 12 moles of water × 18 g/mol = 216 g of water
b) Actual yield = 269.34 g
Theoretical yield = 396 g
% yield = actual yield/theoretical yield × 100/1
% yield = 269.34 g /396 g × 100
% yield = 68%
[Kr]4d3
The configuration of Nb2+ is [Kr]4d3. Nb2+ also has an odd number of valence electrons.
Answer:
The concentration of the HNO3 solution is 0.150 M
Explanation:
<u>Step 1:</u> Data given
Volume of the unknown HNO3 sample = 0.120 L
Volume of the 0.200 M Ba(OH)2 = 45.1 mL
<u>Step 2:</u> The balanced equation
2HNO3 + Ba(OH)2 ⟶ Ba(NO3)2 + 2H2O
<u>Step 3:</u> Calculate moles Ba(OH)2
moles Ba(OH)2 = molarity * volume
moles Ba(OH)2 = 0.200 M * 0.0451 L
moles Ba(OH)2 = 0.00902 moles
<u>Step 4:</u> Calculate moles of HNO3
For 1 mole of Ba(OH)2 we need 2 moles of HNO3
For 0.00902 moles of Ba(OH)2 we need 2*0.00902 = 0.01804 moles
<u>Step 5</u>: Calculate molarity of HNO3
molarity = moles / volume
molarity = 0.01804 / 0.120 L
Molarity = 0.150 M HNO3
The concentration of the HNO3 solution is 0.150 M
Answer:
b. colloid
Explanation:
Colloids are solutions that are going to have a solute and a solvent, but the size of the particles are bigger than in a solution that is clear. that is the reason that it looks blurred because the particles are bigger.
In the other hand, these particles of the solute are big, but not so big and heavy as in a suspension, so they are not going to precipitate in the bottom.
The movement of the particles are called Brownian movement, and they are the responsible to avoid to settle down at the bottom of the recipient.
C. Summarizing
He read the book, then summarized what he read in his report.
