Muscles convert chemical energy into mechanical energy
Answer:
13
Explanation:
Let's consider the unbalanced equation for the combustion of propane.
C₃H₈ + O₂ ⇒ CO₂ + H₂O
We will begin balancing H atoms by multiplying H₂O by 4.
C₃H₈ + O₂ ⇒ CO₂ + 4 H₂O
Now, we balance C atoms by multiplying CO₂ by 3.
C₃H₈ + O₂ ⇒ 3 CO₂ + 4 H₂O
Finally, we get the balanced equation multiplying O₂ by 5.
C₃H₈ + 5 O₂ ⇒ 3 CO₂ + 4 H₂O
The sum of the coefficients is 1 + 5 + 3 + 4 = 13.
percent by mass of carbon = 27,27 %
percent by mass of oxygen = 72.72 %
Explanation:
To calculate the percent composition of carbon dioxide (CO₂) we use the following algorithm.
Molecular mass of CO₂ = atomic weight of carbon × number of carbon atoms + atomic weight of oxygen + number of oxigen atoms
Molecular mass of CO₂ = 12 × 1 + 16 × 2 = 44 g / mole
Considering 1 mole of CO₂ we devise the following reasoning:
If in 44 g of CO₂ we have 12 g of carbon and 32 g of oxygen
Then in 100 g of CO₂ we have X g of carbon and Y g of oxygen
X = (100 × 12) / 44 = 27,27 % carbon
Y = (100 × 32) / 44 = 72.72 % oxygen
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Answer: adding
Explanation:
Because it takes thermal energy to power it
Answer:
a. Molarity=
b. Molality=
Explanation:
Hello,
In this case, given the information about the aniline, whose molar mass is 93g/mol, one could assume the volume of the solution is just 200 mL (0.200 L) as no volume change is observed when mixing, therefore, the molarity results:
Moreover, the molality:
Best regards.