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guajiro [1.7K]
3 years ago
15

HELP WITH SCIENCE PLEASE, ASAP!!!!!!!!! (you get 25 points)

Chemistry
2 answers:
Aliun [14]3 years ago
8 0
The answer is the 3rd one
Bingel [31]3 years ago
7 0
C is the answer for you
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d) A short ton of coal holds about 2.24 x 107 J of energy and costs about $56.45 per short ton. How many Joules of energy in the
Feliz [49]

Answer:

396811.337 J

Explanation:

The cost of one short ton of coal = $56.45

The energy related to the short ton of coal = 2.24\times 10^{7}\ J

Thus, As according to the question,

$56.45 of coal have 2.24\times 10^{7}\ J of energy.

$1 of coal have \frac{2.24\times 10^{7}}{56.45}\ J of energy.

<u>The amount of energy = 396811.337 J</u>

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3 years ago
Ba(OH)2 Ba+2 + 2 OH- (dissolved in solution). Which will NOT happen to the equilibrium of this solution as H+ ions are added? H+
prohojiy [21]

Answer:

The reaction will move to the left.

Explanation:

  • For the reaction:

<em>Ba(OH)₂ = Ba²⁺ + 2OH⁻,</em>

<em>Ba(OH)₂ is dissociated to Ba²⁺ and 2OH⁻.</em>

  • If H⁺ ions are added to the equilibrium:

H⁺ will combine with OH⁻ to form water.

<em>So, the concentration of OH⁻ will decrease and the equilibrium is disturbed.</em>

<em />

<em>According to Le Châtelier's principle: </em>when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.

  • So, the reaction will move to the right to suppress the effect of decreasing OH⁻ concentration.

  • The base will dissociate to form more OH⁻ and thus, the quantity of Ba(OH)₂ will decrease.

<em>So, the right choice is: the reaction will move to the left, is the choice that will not happen to the equilibrium.</em>

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3 years ago
Every object in the universe is always exerting force and is measured as
bonufazy [111]
Gravity, its what holds the whole universe together
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What is the relationship between a gene and a trait?
oee [108]
A gene is harder to explain but it is scientifically what decides who you are (what you look like) and a trait is something from how you act to somoyour interested in. Ex. Girl who is a dog lover
The gene decides she is a girl
The trait is that she likes dogs
4 0
3 years ago
How many moles of sulfate ions are in a sample of aluminum sulfate in which the number of formula units is 7.534 × 1023?
valentina_108 [34]

Answer:a unit of grammatical organization next below the sentence in rank and in traditional grammar said to consist of a subject and predicate

Explanation:

7 0
3 years ago
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