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nasty-shy [4]
3 years ago
11

Calculate the root means square velocity of nitrogen molecules in 25 degrees Celsius

Chemistry
1 answer:
Mademuasel [1]3 years ago
7 0
Calculate the root mean square velocity of nitrogen molecules at 25°C.
297 m/s
149 m/s
515 m/s
729 m/s
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Consider the following generic reaction for which Kp = 5.51 × 105 at 25°C:2R(g)+A(g)⇌2Z(g)What is the value of Kc for the reacti
IRINA_888 [86]

Answer:

Kc = 1.35x10^7

Explanation:

Let's write the reaction again:

2R + A <------> 2Z    Kp = 5.51x10^5

In order to know the value of Kc, we need to write the expression that relations the Kp with Kc which is:

Kp = Kc * (RT)^Δn (1)

Where:

R: 0.082 L atm/ K mol

Δn: difference between the coefficients of the reaction

Kc: equilibrium constant

T: temperature in K

Now, from the equation (1) we can solve for Kc:

Kc = Kp / (RT)^Δn (2)

Now, before do any calculations, let's do first the value of Δn:

Δn = 2 - (2+1) = -1

Now, replacing all values in (2):

Kc = 5.51x10^5 / (0.082*298)^-1

Kc = 1.346x10^7

The third option is the correct one.

7 0
3 years ago
Which of the following is consistent with a reaction that proceeds spontaneously in the reverse direction (assume all variables
elena-s [515]

Answer:

B. ΔG > 0, Q > K

Explanation:

For reverse reaction to take place Q should be greater than K

Since reverse reaction should be spontaneous, forward reaction should be non spontaneous.

So, for forward reaction, ΔG > 0

Hence, the correct answer is B

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Which nucleic acid is responsible for controlling the type of cell that is created? a. pla b. dna crna
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The table shows the characteristics of four substances after they are placed in water.
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Answer:

Electrolytes are chemicals that break into ions (ionize) when they are dissolved in water. The positively-charged ions are called cations, while the negatively charged ions are called anions.  

Strong electrolytes completely ionize in water. This means 100% of the dissolved chemical breaks into cations and anions.

Weak electrolytes partially ionize in water. Pretty much any dissociation into ions between 0% and 100% makes a chemical a weak electrolyte, but in practice, around 1% to 10% of a weak electrolyte breaks into ions.

If a substance doesn’t ionize in water at all, it’s a nonelectrolyte.

Explanation:

5 0
3 years ago
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Select the correct answer. Which property is typical of a covalent compound?
Vesnalui [34]

Answer:

it is b

Explanation:

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3 years ago
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