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miss Akunina [59]
3 years ago
9

An ionic compound contains an unknown ion X and has the formula X3N2. Ion X contains 10 electrons. Write down the chemical symbo

l of X?
​
Chemistry
1 answer:
Delvig [45]3 years ago
8 0

Answer:

Mg3N2

Explanation:

it would be magnesium as it would loss to electron so it would have 10 electron. you can see in the picture above .

hope this helps :)

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P5-F2 + Ar --> ArF3
anzhelika [568]

Answer:

5a. 13.5 moles of F₂

5b. 3.33 moles of Ar.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

3F₂ + 2Ar —> 2ArF₃

From the balanced equation above,

3 moles of F₂ reacted with 2 moles of Ar to produce 2 moles of ArF₃.

5a. Determination of the number of mole of fluorine, F₂, needed to produce 9 moles of ArF₃.

From the balanced equation above,

3 moles of F₂ reacted to produce 2 moles of ArF₃.

Therefore, Xmol of F₂ will react to produce 9 moles of ArF₃ i.e

Xmol of F₂ = (3 × 9)/2

Xmol of F₂ = 13.5 moles

Thus, 13.5 moles of F₂ is needed.

5b. Determination of the number of mole of Ar needed to react with 5 moles F₂.

From the balanced equation above,

3 moles of F₂ reacted with 2 moles of Ar.

Therefore, 5 moles of F₂ will react with = (5 × 2)/3 = 3.33 moles of Ar.

Thus, 3.33 moles of Ar was consumed.

8 0
3 years ago
Having energy in the reactant lead to an exothermic reaction.<br>true<br>false​
Ostrovityanka [42]

Answer:

false

Explanation:

first of all;-energy lead to an indotermic reaction.

indotermic is a reaction that absorbs energy \

*it has positive enthalpy of reaction

*Heat content of product is greater than that of reactant

*Heat is added to reactant side

example;- CO^2+2H^2+891kj --------- CH4 +2O2

6 0
3 years ago
What are the spectators ions in this reaction?
miv72 [106K]

Answer:

Option C. Na⁺(aq) and Cl¯(aq)

Explanation:

From the question given above, we obtained the following:

Na₂SO₄(aq) + CaCl₂(aq) —> CaSO₄(s) + 2NaCl(aq)

Ionic Equation:

2Na⁺(aq) + SO₄²¯(aq) + Ca²⁺(aq) + 2Cl¯(aq) —> CaSO₄(s) + 2Na⁺(aq) + 2Cl¯(aq)

From the ionic equation above, we can see that Na⁺(aq) and Cl¯(aq) are present on both side of the equation.

Therefore, Na⁺(aq) and Cl¯(aq) are the spectator ions because they did not participate directly in the reaction.

4 0
3 years ago
Fe-54 = 5.845%
FrozenT [24]

Answer:

\boxed {\boxed {\sf 55.76756  \ amu}}

Explanation:

The average atomic mass is the sum of the product of the given masses and their abundances. We have to complete two steps for each isotope, then add all the products together.

<u>Fe-54</u>

Convert the percent abundance to a decimal by dividing by 100.

  • 5.845/100= 0.05845

Multiply the abundance as a decimal by the mass number. This is the number after the element in the isotope symbol (54 amu).

  • 0.005845 * 54=3.1563 amu

<u>Fe-56</u>

Convert the percent to a decimal.

  • 91.754/100=0.91754

Multiply the decimal by the mass number (56 amu).

  • 0.91754 * 56= 51.38224 amu

<u>Fe-58</u>

Convert the percent to a decimal.

  • 2.119/100=0.02119

Multiply by the mass number (58 amu).

  • 0.02119 * 58 = 1.22902 amu

<u>Average Atomic Mass</u>

Add all the products together to find the average atomic mass.

  • 3.1563 amu + 51.38224 amu + 1.22902 amu =55.76756 amu

The average atomic mass given the percent abundance is <u>55.7656 atomic mass units.</u>

8 0
3 years ago
Alexandra decides to climb Mt. Krumpett, which is 5000 m high. She determines that this will require a total of 2700 kcal of ene
lara31 [8.8K]
The calories per gram of each substance are:

Protein: 4 calories / gram
Carbohydrates: 4 calories / gram
Fat: 9 calories / gram

So, one bar contains:

50 * 4 + 10 * 9 + 40 * 4
450 calories

If she were to eat only these bars, she will need:

2,700 / 450
= 6 nutrition bars for her climb
4 0
3 years ago
Read 2 more answers
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