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4 years ago

Consider this equilibrium:

2 answers:

7 0

This is the complete answer, including the set of answer choices:

Certain conditions provide less than 10% yield of NH3 at equilibrium. Which statement describes this equilibrium?

A. The Keq is large and products are favored.
B. The Keq is small and products are favored.
C. The Keq is large and reactants are favored.
D. The Keqis small and reactants are favored.
E. The conditions of the reaction must be known to answer the question

To answer you must know that the equilibrium yield is the quantity of product obtained.

In this case it is 10% of NH3.

That means that the equilibrium is more favorable to the reactants.

Given that Ke relates the concentration of products / concentration of reactants, the answer is the Ke is small and reactants are favored

netineya [11]4 years ago

3 0

Answer:

the answer is D the Ke is small and reactants are favored

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How many total ions are present in 347g of cacl2?

vladimir1956 [14]

In 1 mole of $CaCl_{2}$ , there are 3 moles of ions, 1 mole of Ca^{2+} and 2 mole of $Cl^{-1}$ .

$CaCl_{2}\rightarrow Ca^{2+}+2Cl^{-}$

Molar mass of $CaCl_{2}$ is 110.98 g/mol. Calculating number of moles from given mass as follows:

$n=\frac{m}{M}=\frac{347 g}{110.98 g/mol}=3.12 mol$

Thus, number of moles of ions will be $3\times 3.12 mol=9.38 mol$ .

Since, 1 mole of any substance has $6.023\times 10^{23}$ units of that substance where $6.023\times 10^{23}$ is Avogadro's number.

Thus, 9.38 mol of ions will have $9.38\times 6.023\times 10^{23}=5.65\times 10^{24}$ number of ions.

Therefore, total number of ions in 347 g of $CaCl_{2}$ is $5.65\times 10^{24}$ .

8 0

3 years ago

What happens when sodium undergoes a chemical reaction with chlorine? A The two substances form a heterogeneous mixture B. The t

Ainat [17]

Answer:

C.) A new compound is formed - salt

Explanation:

Na is a metal

Cl is a nonmetal

When they are combined, they form ionic bonds as they seek to fill their octets. Salts are ionic compounds.

6 0

3 years ago

They say that the sun will blow up after 200 billion years.

Nikitich [7]

Answer:

True

Explanation:

Because the sun is a star, all stars eventually explode after a certain amount of time

4 0

3 years ago

Read 2 more answers

Which element in period 4 would have chemical properties similar to magnesium? 7. which metalloids would have chemical propertie

azamat

The only solution you'll need to have for this problem is a periodic table. The columns in the table are called groups, and they are number from the left to the right starting with 1. The rows in the table are called periods which are numbered from the top to bottom starting with 1.

6. Elements that belong to the same group portray similar chemical properties. Therefore, the element in period 4 which is also in group 2 is Calcium (Ca).

7. The elements that are striked through with the red slanting lines are the metalloids. All the elements to the left of the metalloids are metals. All the elements to the right are nonmetals. Bromine has a symbol of Br. Since At is a metalloid and located in the same group with Br, the answer is Astatine (At).

8. Tin has the chemical symbol of Sn. The nonmetal that is located in the same group is Carbon (C).

9. All the elements in period 6 would have similar properties. The answers could be: Phosphorus (P), Arsenic (As), Antimony (Sb) and Bismuth (Bi).

10. Period is row 1 and group 18 is the last column. The answer is Helium (He).

5 0

3 years ago

Read 2 more answers

95. The time for a half-life of a first order reaction is 1 1 point

natka813 [3]

Answer:

The correct answer is - C) 3 hours.

Explanation:

Given:

The half-life = 1 hour

Solution:

The half-life of an element is the time required to decay half of its initial amount.

To complete 87.5%, there total numbers of half-live would be -

1st halflife = 50% of the initial amount

2nd half-life = 50 + 50% of (50) = 50 +25 = 75% of initial amount

3rd half-life = 50 + 50 % of (50) + 50% of (25) = 87.5% of initial amount

so, to complete the 87.5 % of decay it required 3 half lives, and each half-life take one hour thus, total time taken = 3 hours

4 0

3 years ago