Answer:
A. Diagram B is a gas, because its particles move more slowly and are farther apart.
Answer: 3500cm-1
Explanation: The -OH bond absorbs IR and vibrates at a characteristic and many times distinctive wave number of 3500cm-1. The -C=O would vibrate at 1700cm-1 though not clearly because -C-O bond typically vibrates around this point
1 mole ------------- 6.02 x 10²³ molecules
( moles ) ---------- 2.0 x 10²² molecules
moles = ( 2.0 x 10²² ) x 1 / 6.02 x 10²³
moles = 2.0 x 10²² / 6.02 x 10²³
= 0.03 moles of water
hope this helps!
The number of moles of the gas sample present at the end is 0.78 moles.
<h3>
Number of moles of the gas</h3>
PV = nRT
V = nRT/P
At a constant volume, V;
n₁RT₁/P₁ = n₂RT₂/P₂
n₁T₁/P₁ = n₂T₂/P₂
n₂ = (n₁T₁P₂)/(P₁T₂)
where;
- T₁ is initial temperature = 21.7⁰C = 294.7 K
- T₂ is final temperature = 28.1⁰C = 301.1 K
n₂ = (3 x 294.7 x 0.998)/(3.75 x 301.1)
n₂ = 0.78 moles
Thus, the number of moles of the gas sample present at the end is 0.78 moles.
Learn more about number of moles here: brainly.com/question/15356425
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Answer:
4.5 moles H₂O
or
81.072 g H₂O
Explanation:
I am not exactly sure whether you want moles H₂O or grams H₂O. So, I'll calculate both. To find the moles H₂O, you'll need to covert moles C₈H₁₈ to moles H₂O via the mole-to-mole ratio from the reaction coefficients. To find the grams H₂O, you need to convert moles H₂O to grams H₂O via the molar mass.
2 C₈H₁₈ + 25 O₂ ---> 16 CO₂ + 18 H₂O
0.5 mole C₈H₁₈ 18 moles H₂O
----------------------- x ------------------------- = 4.5 moles H₂O
2 moles C₈H₁₈
Molar Mass (H₂O): 2(1.008 g/mol) + 16.00 g/mol
Molar Mass (H₂O): 18.016 g/mol
4.5 moles H₂O 18.016 g
---------------------- x ---------------- = 81.072 g H₂O
1 mole