From where does the nitrogen in the nitrogen cycle originate?a. root nodules of legumes
b. the atmosphere
c. decomposers
d. nitrifying bacteria

Answers

Answer 1

Answer: The correct answer is B. The nitrogen in the nitrogen cycle originate from the atmosphere. It forms approximately 78% of the Earth's atmosphere. However, this form is not usable because it is in its most stable form therefore unreactive. This nitrogen gas needs to be converted into nitrate compound for it to be usable. Then, the nitrogen cycle starts.

Answer 2

Answer:

Answer:

B) the atmosphere

Explanation:

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At 700 K the equilibrium constant KC for the reaction between NO(g) and O2(g) forming NO2(g) is 8.7 × 106. The rate constant for the reverse reaction at this temperature is 0.54 M–1s–1. What is the value of the rate constant for the forward reaction at 700 K?

Answers

Answer : The value of the rate constant for the forward reaction at 700 K is, $4.70* 10^6$

Explanation :

The given chemical equilibrium reaction is:

$NO(g)+O_2(g)\rightleftharpoons NO_2(g)$

The expression for equilibrium constant is:

$K_c=([NO_2])/([NO][O_2])$

The expression for rate of forward and backward reaction is:

$R_f=K_f[NO][O_2]$

and,

$R_b=K_b[NO_2]$

As we know that at equilibrium rate of forward reaction is equal to rate of backward reaction.

$R_f=R_b$

$K_f[NO][O_2]=K_b[NO_2]$

$(K_f)/(K_b)=([NO_2])/([NO][O_2])$

$(K_f)/(K_b)=K_c$

Given:

$K_c=8.7* 10^6$

$K_b=0.54M^(-1)s^(-1)$

Now put all the given values in the above expression we get:

$(K_f)/(K_b)=K_c$

$(K_f)/(0.54)=8.7* 10^6$

$K_f=4.70* 10^6$

Therefore, the value of the rate constant for the forward reaction at 700 K is, $4.70* 10^6$

(50 POINTS AND WILL GIVE BRAINLY!) which actions will help a package of hot chocolate powder to dissolve more quickly? a. heating the water
b. using pure water
c. blowing on the hot water
d. putting the powder and hot water in a mixer

Answers

A , i think because pure water won't dissolve the powder fast.

how many moles of oxygen gas (o2) are required to react with 3.75 moles of ammonia (nh3) in the reaction 4nh3 + 5o2 → 4no + 6h2o?

Answers

4 NH₃ + 5 O2 = 4NO + 6 H₂O

4 moles NH₃ ---------> 5 moles O₂
3.75 mols NH₃ -------> ?

Moles O₂ = 3.75 x 5 / 4

Moles O₂ = 18.75 / 4

= 4.6875 moles of O₂

hope this helps!

Ammonia is an important ingredient in many fertilizers. The main process by which ammonia is made is the Haber process. In this process, nitrogen gas and hydrogen gas are reacted to form ammonia at high temperatures. Which of the following most likely explains why this reaction is carried out at high temperature?Ammonia is unstable at room temperature.
High temperatures increase the activation energy of the reaction.
High temperatures make the gas molecules move more quickly.
The reaction becomes exothermic at high temperatures.

Answers

The best answer is "High temperatures increase the activation energy of the reaction."

The Haber process is an exothermic reaction at room temperature. This means that the reaction actually favors the reverse reaction, especially when the temperature is increased. So why increase the reaction temperature?

The reason for this is that nitrogen is a very stable element. Therefore, more energy is needed to overcome the slow rate of reaction. So the reaction temperature must be low enough to favor a forward reaction, but high enough to speed up the reaction.

this is wrong do not put this if your with FLVS

the correct answer is C i got 100% on it

Starting a fitness plan slowly will lead to better results than starting out quickly TRUE OR FALSE

Answers

True. Hope that helps!

Starting a fitness plan slowly will lead to better results than starting out quickly TRUE OR FALSE.True

Molecules in a sample of NH3(l) are held closely together by intermolecular forces(1) existing between ions(2) existing between electrons(3) caused by different numbers of neutrons(4) caused by unequal charge distribution

Answers

Molecules in a sample of NH3(l) are held closely together by intermolecular forces existing between ions. The answer is number 1. NH3 is governed by hydrogen bonding. Hydrogen bonding is the bonding between an H atom and the element that it combines with.

Answer:

D) Caused by unequal charge distribution

Explanation:

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