All categories

3 years ago

How many atoms are in 2.70 moles of iron (Fe) atoms?

Chemistry

1 answer:

vredina [299]3 years ago

3 0

The answer is 1.63 × 1024 atoms Fe.

Avogadro's number is the number of units (atoms, molecules) in 1 mole of substance:

6.023 × 10²³ atoms per 1 mole
So, how many atoms are per 2.70 moles:

6.023 × 10²³ atoms : 1 mole = x : 2.70 moles
x = 6.023 × 10²³ atoms * 2.70 moles : 1 mole
x = 16.3 × 10²³ = 1.63 × 10 × 10²³ = 1.63 × 10²⁴ atoms

You might be interested in

3Fe + 4H2O Fe3O4 + 4H2

aalyn [17]

These are five questions with its five answers.


First, we have to explain main question.


The statement provides the chemical equation for the reaction of Fe with water to produce iron(III) oxide and hydrogen.


Fe3O4 is a weird chemical formula. It belongs to the product named oxoiron.


Next, I have to tell how you must interpret the question. The five questions are based on the complete reaction of the same number of moles as the coefficients indicated in the chemical equation.


Those coefficients are 3 for Fe, 4 for H₂O, 1 for Fe₃O₄ and 4 for H₂.

With that understood, let's work every question.

1) How many molecules of H₂ are produced?

Answer: 4 moles of molecules.

Justification:


This is, the number of moles of H₂ produced is given by the coefficient indicated in the chemical equation.


2) How many oxygen atoms are required?


Answer: 4.

This is, the atoms of oxygen are supplied in the molecules of water. Since the coeffcient of water is 4, and each molecule o fwater has 1 atom of oxygen, 4 moles of water contain 4 moles of atoms of oxygen.


3) How many moles of Fe₃O₄ are formed?


Answer: 1.


Justification: the coefficient of for formula Fe₃O₄ is 1, indicating that the theoretical yield is 1 mol of molecules.


4) What is the mole ratio of Fe to H₂O?


Answer: 3:4


Justification:


The ratio is the quotient of the two coefficients: the coefficient of the Fe divided by the coefficient of the H₂O.


5) How many hydrogen atoms are involved in this reaction?


Answer: 8 moles of hydrogen atoms.


Justification: as you can see each molecule of H₂O has 2 atoms of hydrogen, then 4 moles of molecules of H₂O have 8 moles of atoms of hydrogen. And of course the same number are in the produt: 4 moles of H₂ contain 8 moles of atomos of hydrogen

3 0

3 years ago

Read 2 more answers

Is/are determined by a genetic trait passed on from parents to their children

Darya [45]

Answer:genes

Explanation:

7 0

3 years ago

Currents at the surface of the ocean are

lakkis [162]

Answer:

D. The mixing of warm and cold water

Explanation:

5 0

3 years ago

Dissolution of KOH, ΔHsoln:

swat32

Using Hess's law we found:

1) By adding reaction 10.2 with the reverse of reaction 10.1 we get reaction 10.3:

KOH(aq) + HCl(aq) → H₂O(l) + KCl(aq) ΔH (10.3)

2) The ΔHsoln must be subtracted from ΔHneut to get the total change in enthalpy (ΔH).

The reactions of dissolution (10.1) and neutralization (10.2) are:

KOH(s) → KOH(aq) ΔHsoln (10.1)

KOH(s) + HCl(aq) → H₂O(l) + KCl(aq) ΔHneut (10.2)

1) According to Hess's law, the total change in enthalpy of a reaction resulting from differents changes in various reactions can be calculated as the sum of all the enthalpies of all those reactions.

Hence, to get reaction 10.3:

KOH(aq) + HCl(aq) → H₂O(l) + KCl(aq) (10.3)

We need to add reaction 10.2 to the reverse of reaction 10.1

KOH(s) + HCl(aq) + KOH(aq) → H₂O(l) + KCl(aq) + KOH(s)

Canceling the KOH(s) from both sides, we get reaction 10.3:

KOH(aq) + HCl(aq) → H₂O(l) + KCl(aq) (10.3)

2) The change in enthalpy for reaction 10.3 can be calculated as the sum of the enthalpies ΔHsoln and ΔHneut:

$\Delta H = \Delta H_{soln} + \Delta H_{neut}$

The enthalpy of reaction 10.1 (ΔHsoln) changed its sign when we reversed reaction 10.1, so:

$\Delta H = \Delta H_{neut} - \Delta H_{soln}$

Therefore, the ΔHsoln must be subtracted from ΔHneut to get the total change in enthalpy ΔH.

Learn more here:

brainly.com/question/2082986?referrer=searchResults

brainly.com/question/1657608?referrer=searchResults

I hope it helps you!

6 0

2 years ago

PLEASE HELP

Olenka [21]

There is no reaction because of the common ion effect(which in this case is K)if there were a reaction the products would be the same as the reactants so no reaction happens

5 0

3 years ago