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saveliy_v [14]
3 years ago
5

According yo the ruler postulate what does the set of points on any like corresopnd to

Chemistry
1 answer:
WITCHER [35]3 years ago
6 0
This is a hard one but dont worry i am here to help not here to get points. Because I want to know the answer myself so I think the answer to this is A real numbers 
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A fluorine ion has nine protons and a charge of -1. how many electrons are in an ion the fluorine. A. 1 B. 9 C. 10 D. 8
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10, it has gained and electron which increases the charge, as the -1 indicates 
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Which of the following energy quantities is equivalent to 578 J?
svlad2 [7]

Answer:

  • <em>0.138 kcal</em>

Explanation:

The answer choices are:

  • a) 5.78 × 10⁵ kJ
  • b) 138 kcal
  • c)0.138 kcal
  • d)1.38 × 10⁵ kcal

<h2>Solution</h2>

You must use the conversion factors to convert J to kcal.

  • 1cal = 4.184J

        Dividing both sides by 4.184J:

        ⇒ 1 = 1cal/4.184J

  • 1kcal = 1,000cal

       Dividing both sides by 1,000 cal

        ⇒ 1 = 1kcal / 1,000 cal

Mutiply<em> 578J</em> by the conversion factors to find <em>kcal</em>:

       578J\times 1cal/4.184J\times 1kcal/1,000cal=0.138kcal

Notice how the units J and cal cancel to yield kcal at the end.

5 0
3 years ago
Calculate the density of a water bottle with a mass of 4 grams and a volume of 100ml.
lilavasa [31]

Answer:

density is 40

Explanation:

6 0
3 years ago
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svlad2 [7]

Answer:

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3 0
3 years ago
Find and fix each mistake in the following equilibrium constant expressions.
IRINA_888 [86]

Answer:

A. c. Keq=[H2]^2[S2]/[H2S]^2

B. b. Keq=[COCl2]/[CO][Cl2]

Explanation:

Hello,

In this case, considering the law of mass action which states that the equilibrium expression is written in terms of the concentration of products divided by the concentration of reactants considering the stoichiometric coefficients as powers we obtain:

A. For the reaction:

2H_2S(g)\rightleftharpoons 2H_2(g)+S_2(g)

The equilibrium expression is:

Keq=\frac{[H_2]^2[S_2]}{[H_2S]^2}

Therefore, answer is c. Keq=[H2]^2[S2]/[H2S]^2.

B. For the reaction:

CO(g)+Cl_2(g)\rightleftharpoons COCl_2(g)

The equilibrium expression is:

Keq=\frac{[COCl_2]}{[CO][Cl_2]}

Therefore, answer is b. Keq=[COCl2]/[CO][Cl2].

Regards.

8 0
3 years ago
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