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anygoal [31]
3 years ago
10

Which wind belt do we live in​

Chemistry
2 answers:
I am Lyosha [343]3 years ago
7 0

Answer:The USA lives in the Westerly Windbelt

Explanation:

vesna_86 [32]3 years ago
4 0

Answer:

the wind belt one

Explanation:

mhm

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For the reaction POCl3(g) ⇀↽ POCl(g) + Cl2(g) Kc = 0.30. An initial 0.3 moles of POCl3 are placed in a 3.1 L container with init
olya-2409 [2.1K]

<u>Answer:</u> The final concentration of POCl_3 is 0.019767 M

<u>Explanation:</u>

Molarity is calculated by using the equation:

\text{Molarity}=\frac{\text{Number of moles}}{\text{Volume of the solution}}

Initial moles of POCl_3 = 0.3 moles

Volume of solution = 3.1 L

\text{Initial concentration of }POCl_3=\frac{0.3}{3.1}=0.097M

For the given chemical equation:

                        POCl_3(g)\rightleftharpoons POCl(g)+Cl_2(g)

<u>Initial:</u>                0.097

<u>At eqllm:</u>         0.097-x             x              x

The expression of K_c for above equation follows:

K_c=\frac{[POCl][Cl_2]}{[POCl_3]}

We are given:

K_c=0.30

Putting values in above expression, we get:

0.30=\frac{x\times x}{(0.097-x)}\\\\x=0.077233,-0.377

Neglecting the negative value of 'x' because concentration cannot be negative.

So, final concentration of POCl_3 = (0.097 - x) = (0.097 - 0.077233) = 0.019767 M

Hence, the final concentration of POCl_3 is 0.019767 M

4 0
3 years ago
How many grams are there in 0.250 moles of Ba(NO3)2?
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The nuclide Rn-204 is the daughter nuclide resulting from the α decay of what
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How many electrons can be held in the third orbital?.
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CH4(g) + 2O2(g) → CO2(g) + 2H2O(l): ΔH = −890 kJ
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The reaction of one mole of oxygen (O2) releases 445 kJ of energy.

Explanation:

Firstly, the reaction is exothermic since the sign of enthalpy change ΔH  is negative.

The balanced equation: CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l): ΔH = −890 kJ,

Shows that 1 mole of CH₄ react with 2 moles of oxygen and releases 890 kJ.

So, every choice says that absorb is wrong (choice 1& 3).

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So, the right choice is The reaction of one mole of oxygen (O2) releases 445 kJ of energy.

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