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GenaCL600 [577]
3 years ago
7

Which of the following is the definition of an adaptation?

Chemistry
1 answer:
Serggg [28]3 years ago
6 0

Answer:

A

Explanation:

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A 0.055 mol sample of formaldehyde vapor, CH2O, was placed in a heated 500 mL vessel and some of it decomposed. The reaction is
Elis [28]

Answer:

Kc for this reaction is 0.06825

Explanation:

Step 1: Data given

Number of moles formaldehyde CH2O = 0.055 moles

Volume = 500 mL = 0.500 L

At equilibrium, the CH2O(g) concentration = 0.051 mol

Step 2: The balanced equation

CH2O  <=>  H2 + CO

Step 3: Calculate the initial concentrations

Concentration = moles / volume

[CH2O] = 0.055 moles . 0.500 L

[CH2O] = 0.11 M

[H2] = 0M

[CO] = 0M

Step 4: The concentration at the equilibrium

[CH2O] = 0.11 - X M = 0.051 M

[H2] = XM

[CO] = XM

[CH2O] = 0.11 - X M = 0.051 M

X = 0.11 - 0.051 = 0.059

[H2] = XM = 0.059 M

[CO] = XM = 0.059 M

Step 5: Calculate Kc

Kc = [H2][CO]/[CHO]

Kc = (0.059 * 0.059) / 0.051

Kc = 0.06825

Kc for this reaction is 0.06825

7 0
3 years ago
From the combinations of substances listed below, which would most likely be miscible in
polet [3.4K]

Answer:

C

Explanation:

polar has unequal sharing of electrons that has the lone pairs which has the electronegativity difference. can be mixed with water.

4 0
3 years ago
Kaillie was talking and was distracted as she stirred sugar into her tea. when she finally noticed, there was a few crystals of
AleksandrR [38]

Answer:

Supersaturated

Explanation:

The tea has absorbed and dissolved as much sugar as it could. If there is sugar left at the bottom, it means the solution is supersaturated because it can't absorb any more.

5 0
3 years ago
Read 2 more answers
What element am I?
Serga [27]

Answer:

H- hydrogen

Explanation: Hydrogen is in the first group meaning that it only has 1 valence electron and 1 energy level

4 0
2 years ago
Most matter is made up of _____, rather than single _____.
bixtya [17]

Answer:

molecules, elements

Explanation:

molecules are a mix of elements

7 0
1 year ago
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