Answer: I believe/don't believe hummingbirds are attracted to the color red because ... (Enter your reasons)
Explanation:
Hypothesis are always different, up to you to choose believe or not believe depending on your position.
:) Hope this helped.
Answer:
20 mol H₂
General Formulas and Concepts:
<u>Chem</u>
Explanation:
<u>Step 1: Define</u>
RxN: C + H₂ → CH₄
8 moles CH₄
<u>Step 2: Balance RxN</u>
C + 2H₂ → CH₄
<u />
<u>Step 3: Stoichiometry</u>
= 16 mol H₂
<u>Step 4: Check</u>
<em>We are given 1 sig fig. Follow sig fig rules.</em>
16 mol H₂ ≈ 20 mol H₂
Answer:
375.3KJ
Explanation:
The following data were obtained from the question:
Mass of water = 166g
Heat of Vaporisation (ΔHv) = 40.7kJ/mol
Heat (Q) =..?
Next, we shall determine the number of mole in 166g of water. This is illustrated below:
Mass of H2O = 166g
Molar mass of H2O = (2x1) + 16 = 18g/mol
Number of mole = Mass/Molar Mass
Number of mole of H2O = 166/18
Number of mole of H2O = 9.22 moles.
Now, we can obtain the heat required to vaporise the water as shown below:
Q = n·ΔHv
Q = 9.22 mol x 40.7kJ/mol
Q = 375.3KJ
Therefore, the heat required to vaporise the water is 375.3KJ.
