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Marat540 [252]
3 years ago
5

Please help... I’m trying to study for a test and I can’t find any information on these questions.

Chemistry
1 answer:
lana66690 [7]3 years ago
3 0

Well usebtainlyzzhxhxxjxudxu d m

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Please help me I will give you the brain thing and extra points. image below part 8
Marizza181 [45]
The correct answer should be D :)
8 0
3 years ago
2H2(g)+2NO(g)→2H2O(g)+N2(g) Part A If the concentration of NO changed from 0.100 M to 0.025 M in the first 15 minutes of the rea
andrew11 [14]

Answer:

0.0025 M/min

Explanation:

The rate of a reaction can be calculated for an element, based on its stoichiometric coefficient. For a reaction:

aA + bB = cC + dD , the rate will be

r = -(1/a)x(Δ[A]/Δt) = -(1/b)x(Δ[B]/Δt) = (1/c)x(Δ[C]/Δt) = (1/d)x(Δ[D]/Δt)

Where Δ[X] is the variation of the concentration of the X compound, Δt is the time variation, and the signal of minus in the reagents compounds is because they are disappearing, so Δ[X] will be negative, and r must be positive. So, for the reaction given:

r = -(1/2)x(Δ[NO]/Δt)

r = -(1/2)x( (0.025 - 0.1)/15)

r = 0.0025 M/min

6 0
3 years ago
Cell-mediated immunity differs from humoral immunity in that _____.
inessss [21]
<span>As far as I remember, cell-mediated immunity differs from humoral immunity in that </span>they respond differently to invaders 
8 0
3 years ago
Describe the relationship between predator and prey in a balanced ecosystem
densk [106]

Answer:

The predator-prey relationship helps to hold the populations of the two species in equilibrium. ... If the population of prey increases, there is more food for predators. So after a slight period, the predator population is also increasing. If the number of predators increases, more prey is captured.

Explanation:

8 0
2 years ago
Read 2 more answers
Le Châtelier's principle states that if a stress is applied to a system at equilibrium, the system will shift to relieve that st
zhuklara [117]

Answer:

1) Add more sulfate ions.

2) 1 M K₂SO₄.

Explanation:

<em>1) Which of the following actions would shift this reaction toward solid barium sulfate?</em>

<em></em>

  • Le Châtelier's principle states that if a stress is applied to a system at equilibrium, the system will shift to relieve that stress and attain the equilibrium again.

Add more sulfate ions will increase the concentration of the products side, so the reaction will be shifted towards the reactants side to relieve the stress and attain the equilibrium again.

<em>So, the right choice is: Add more sulfate ions.</em>

<em></em>

<em>2) In which of the following would barium sulfate be least soluble?  </em>

The answer is 1 M K₂SO₄, it has a common ion effect of SO₄⁻ ions that increase the concentration of the products side, so the reaction will be shifted towards the reactants side to relieve the stress and attain the equilibrium again.

<em>So, the solubility will decrease.</em>

3 0
3 years ago
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