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3 years ago

How does electron repulsion in the outer shell cause anions to be larger than their atoms?

1 answer:

5 0

The anion is also larger than the atom because of electron-electron repulsion. As more electrons are added to the outer shell, and even to higher principle energy levels, the repulsion bewteen the negatively charged particles grows, pushing the shells farther from the nucleus.

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Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl:

kow [346]

Answer:

The volume of hydrogen gas generated by given reaction is 9.48 L

Explanation:

Firstly, we calculate the mole of Zinc added, n = 25.5 / 65 = 0.392 mol

With the same equivalent, the mole of generated hydrogen gas will be the same, at 0.392 mol.

Secondly, we get the equation

P . V = n . R . T

with P (pressure, atm), V (volume, litre), n (mole, mol), R (ideal gas constant, 0.082), T (temperature, Kelvin)

So we have to convert the given information to correct unit

P = 742 mmHg = 0.976 atm

T = 15 °C = 288 K

Hence we can calculate the generated volume by

V = n . R . T / P = 0.392 x 0.082 x 288 / 0.976 = 9.48 L

3 0

3 years ago

Write the balanced equation showing the decomposition of carbonic acid and sulfurous acid.

Travka [436]

Explanation:

here's the answer to your question

4 0

3 years ago

How many grams of sodium sulfate Na2SO4 (mw = 142.04 g/mol) is needed to prepare 350.0 ml of a solution having a concentration o

ch4aika [34]

According to the definition of molarity, 350 mL of a solution with a sodium ion concentration of 0.125 M requires 6.2125 g of Na2SO4 to manufacture.

<h3>How to find Molarity ?</h3>

The number of moles of a solute that are dissolved in a given volume is what is meant by the definition of molarity, which is a measurement of a solute's concentration.

By dividing the moles of the solute by the volume of the solution, molarity, also known as the molar concentration of a solution, is obtained.

Molarity = No. of moles of solute / Volume

Molarity is expressed in units mole/litre

In this case, you know that:

molarity= 0.125 M
number of moles of solute= ?
volume= 350 mL= 0.350 mL

Replacing in the definition of molarity:

0.125M = No. of moles of solute / 0.350l

Solving:

number of moles of solute= 0.125 M× 0.350 L

number of moles of solute= 0.04375 moles

Being 142 g/mole the molar mass of Na₂SO₄, that is, the mass of one mole of the compound, the amount of mass that contains 0.04375 moles is calculated as:

mass= 0.04375 moles× 142 g/moles

mass= 6.2125 g

In summary, 6.2125 g of Na₂SO₄ is needed to prepare 350 mL of a solution having a sodium ion concentration of 0.125 M.

To view more about concentrations, refer to;

brainly.com/question/10725862

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6 0

2 years ago

The stage of the cell cycle that follows mitosis is called _____.

Anon25 [30]

The answer is metaphase

3 0

3 years ago

Read 2 more answers

3.45 x 10^20 molecules of sulfur dioxide to miles of sulfur dioxide

topjm [15]

(3.45 x 10^20 molecules of sulfur dioxide ) x $\frac{1 mole sulfur dioxide}{6.022x10^23 molecules sulfur dioxide}$ = 5.73x10^-4 mole of sulfur dioxide

8 0

3 years ago