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3 years ago

PLEASE HURRY. Which of the molecules below is propyne?

Chemistry

2 answers:

Oduvanchick [21]3 years ago

7 0

The last photo because its molecular formula is C3H4.

Valentin [98]3 years ago

6 0

Answer: Option (D) is the correct answer.

Explanation:

General formula of an alkyne is $C_{n}H_{2n-2}$ .

Suffix "yne" in the name of a compound represents that there is a triple bond present in the compound.

So, a molecule of propyne will have three carbon atoms, four hydrogen atoms and a triple bond. Therefore, there wll be 6 sigma bonds and 2 pi bonds in a propyne molecule.

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2 HI(g) ⇄ H2(g) + I2(g) Kc = 0.0156 at 400ºC 0.550 moles of HI are placed in a 2.00 L container and the system is allowed to rea

Alex_Xolod [135]

Answer: The concentration of hydrogen gas at equilibrium is 0.0275 M

Explanation:

Molarity is calculated by using the equation:

$\text{Molarity}=\frac{\text{Number of moles}}{\text{Volume of solution (in L)}}$

Moles of HI = 0.550 moles

Volume of container = 2.00 L

$\text{Initial concentration of HI}=\frac{0.550}{2}=0.275M$

For the given chemical equation:

$2HI(g)\rightleftharpoons H_2(g)+I_2(g)$

Initial: 0.275

At eqllm: 0.275-2x x x

The expression of $K_c$ for above equation follows:

$K_c=\frac{[H_2][I_2]}{[HI]^2}$

We are given:

$K_c=0.0156$

Putting values in above expression, we get:

$0.0156=\frac{x\times x}{(0.275-2x)^2}\\\\x=-0.0458,0.0275$

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

So, equilibrium concentration of hydrogen gas = x = 0.0275 M

Hence, the concentration of hydrogen gas at equilibrium is 0.0275 M

4 0

3 years ago

What greek letter are used in the precise definition of a limit?

Ivan

Epsilon-delta would be the green letter that is used in the precision definition of a limit. (ε, δ).

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3 years ago

Which shows the conversion of 8.93 × 10-2 grams to milligrams?

Allushta [10]

The prefix milli means thousand so the correct conversion factor is 1000mg/g

4 0

3 years ago

Based on the observations of how the different forms of salt start mixing with the

zimovet [89]

I would expect fine salt to fully dissolve by the end of 45 minutes. Since the other types of salt are not fine and tiny, they would take longer to dissolve

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3 years ago

Read 2 more answers

Jason ran 5/7 of the distance around the school track sara ran 4/5 of Jason distance what fraction of the total distance around

FrozenT [24]

Let x represent the total distance around the track
Jason's distance: (5/7)x
Sara ran (4/5) of Jason's distance,
so she ran (4/5)*(5/7)x = (4/7)x
Sara ran 4/7 of the total distance

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3 years ago