Answer:
We are given the following equation:
C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g)
we can see that the number of moles of H2O is 4/3 time the moles of CO2
So, the easiest way to find the number of moles of H2O is to find the number of moles of CO2 and multiply it by 4 / 3
Moles of CO2:
Molar mass of CO2 = 44 grams / mol
Moles of CO2 = Given mass / Molar mass
Moles of CO2 = 16.3 / 44 moles
Moles of H2O:
Moles of H2O = Moles of CO2 * 4 / 3
Moles of H2O = 16.3 * 4 / 3 * 44
Moles of H2O = 16.3 / 3 * 11
Moles of H2O = 16.3 / 33
Moles of H2O = 0.5 moles (approx)
Therefore, along with 16.3 grams of CO2, 0.5 moles of H2O will also be formed
Answer:
Two
Step-by-step explanation:
In <em>multiplication problems</em>, your answer can have no more significant figures than the number with the <em>fewest significant figures</em>.
Start with the calculation inside parentheses:
5.1 × 10.6 = 54.060 000 00 (by my calculator)
There are three significant figures in 10.6, but only two in 5.1.
In this were a number you had to report, you would round to <em>two</em> significant figures and report the answer as 54.
54.060 000 00 → 54 (to two significant figures)
However, you must multiply this intermediate answer by 2.524.
Therefore, you multiply the number in the calculator by 2.524 and get
54.060 000 00 × 2.524 = 136.447 4400
<em>NOW</em>, you round to two significant figures and report the answer as <em>140</em>.
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