**Contents**show

## How many moles of electrons are required to reduce?

The equation shows that 1 mole of Zn^{2}^{+} is reduced to Zn by 2 moles of electrons. For reduction of 2 moles of Zn^{2}^{+}, **4 moles** of electrons will be required.

## How do you calculate moles needed?

Determine the number of moles needed to react by **multiplying by moles of the known substance by the stoichiometric ratio of the unknown substance to** the known substance.

## How many moles are in an electron?

**1 mole** of electrons contains the Avogadro constant, L, electrons – that is 6.02 x 10^{23} electrons. You would also be given that in an exam if you needed to use it.

## How many moles of electrons weigh 1kg?

6. 023×**1023 moles**.

## How many moles of electrons are required for the reduction of mno4?

How many moles of electrons are required to <br> (i) reduce 1 mol of MnO_(4)^(-) to Mn^(2+) <br> (ii) produce 10.0 g of Al from molten Al_(2) O_(3) ? ∴ 10 g of Al will be produced by =327×10=1.11 mol electrons .

## What is the formula for moles to grams?

Moles to grams example problem

Solution: Find out the molar mass of the substance (hint: you can use Molar mass of the substance alone to calculate molar mass). The molar mass of KClO3 is 122.548 g/mol. **Multiply the given number of moles** (2.50 mol) by the molar mass (122.548 g/mol) to get the grams.

## What is the mole formula?

Avogadro’s number is a very important relationship to remember: **1 mole = 6.022×1023 6.022 × 10 23 atoms**, molecules, protons, etc. To convert from moles to atoms, multiply the molar amount by Avogadro’s number. To convert from atoms to moles, divide the atom amount by Avogadro’s number (or multiply by its reciprocal).

## How do you calculate moles of HCl?

**Step 3: Calculate the concentration of hydrochloric acid in mol/dm ^{3}**

- Concentration in mol/dm
^{3}= - Concentration in mol/dm
^{3}= - = 0.125 mol/dm
^{3} - Relative formula mass of HCl = 1 + 35.5 = 36.5.
- Mass = relative formula mass × amount.
- Mass of HCl = 36.5 × 0.125.
- = 4.56 g.
- So concentration = 4.56 g/dm
^{3}

## How many moles are in 1 kg?

The idea here is that 1 kg-mole is equal to **103 moles**. This is the case because a mole of a substance must contain a number of particles of that substance equal to the number of atoms present in exactly 12 g of carbon-12.

## What is meant by 1 mole electron?

1 mole of electron is equal to **the Avogadro constant** that is6.022×1023electrons. Avogadro’s constant is written as NA. Complete step by step answer: We know that, The mass of 1 electron =9.1×10−31kgwhich is equivalent to 9.1×10−25mg.

## How do you convert moles to electrons?

Converting coulombs to moles of electrons, moles of electrons **= coulombs / F** = 6.673 x 10^{2} / 96487 = 6.916 x 10^{–}^{3} mol. from which, one mole of H_{2} formed requires two moles of electrons.