# How many moles are in 7.91 X 1022 atoms of He?

2 months ago

## Solution 1

Guest #5493607
2 months ago

amount of He = (7.91 × 10^22) ÷ (6.02 × 10^23) = 0.131mol (3sf)

Explanation:

you make use of the mole concept formula

amount(mol) = number of particles ÷ 6.02 × 10^23

(6.02 × 10^23 is the avogadro constant, which is an extremely important number in this formula for mole concept)

## 📚 Related Questions

Question
What are all the populations of different species that live in the same area at the same time
Solution 1

Explanation:

Question
How many atoms are in 8.75 moles of Hg?
Solution 1
The answer is 36 atoms :)
Question
What is the percent chance that the offspring will be dwarf plants with yellow fruit
Solution 1

Yellow fruit and dwarf vines are recessive traits in tomatoes. Red fruit and tall vines are dominant. Complete a Punnett square and answer the questions for a completely dominant red and tall plant crossed with a heterozygous red and dwarf plant.

Explanation:

Question
How many grams are in 0.35 moles of C2H6?​
Solution 1

10.524163999999896

Explanation:

Question
1. What part of the human body is the wing most like? ANSWER Help
Solution 1

What part of the human body is most likely the wing would proabably from your elbow joint and the rest of your arm but most likely it would be the elbow joint.

Question
Question 1 Which words in the passage help the reader understand the meaning of the word avid in the first paragraph? A. What he found out B. Many hours gardening C.the curious and observant D.he noticed
Solution 1
Question
Animal and Plant Cells Worksheet Word ​
Solution 1

u didnt give a worksheet

Explanation:

Question
(GIVING BRAINLIEST) A form of POTENTIAL energy that results from the relative positions of the particles in a material. The particles are held in those positions by chemical bonds.
Solution 1

Explanation:

(Potential Energy)

The motionless wrecking ball doesn’t have any kinetic energy. But what would happen if it were lifted two stories up with a crane and suspended above a car? In this case, the wrecking ball isn't moving, but there is, in fact, still energy associated with it. The energy of the suspended wrecking ball reflects its potential to do work (in this case, damage). If the wrecking ball were released, it would do work by making a pancake of someone’s poor car. And if the ball is heavier, the energy associated with it will be greater.This type of energy is known as potential energy, and it is the energy associated with an object because of its position or structure. For instance, the energy in the chemical bonds of a molecule is related to the structure of the molecule and the positions of its atoms relative to one another. Chemical energy, the energy stored in chemical bonds, is thus considered a form of potential energy. Some everyday examples of potential energy include the energy of water held behind a dam, or of a person about to skydive out of an airplane.

Question
A compound is 44.82% Potassium, 18.39% Sulfur, and 36.79% Oxygen. Write the empirical formula and name the compound.
Solution 1

The empirical formula for the given compound has been .

The empirical formula has been the simplest whole-number ratio of the atoms of each element present in the compound.

The atoms of K can be given by:

Atoms =

• The atoms of K =

The atoms of K = 1.15

• The atoms of S =

The atoms of S = 0.57

• The atoms of O =

The atoms of O = 2.29

To obtain the whole number ratio, the atoms have been divided by the smallest atom number i.e. 0.57.

• The atoms of K =

The atoms of K = 2

• The atoms of S =

The atoms of S = 1

• The atoms of O =

The atoms of O = 4

Thus, the empirical formula for the given compound has been .

brainly.com/question/11588623

Solution 2

Empirical formula = K₂SO₄

The name of the compound is Potassium tetraoxosulfate (vi)

Explanation:

Percentage composition of the elements:

Potassium = 44.82%

Sulfur = 18.39%

Oxygen = 36.79%

Mole ratio of the elements:

Potassium = 44.82/39 =1.15

Sulfur = 18.39/32 = 0.57

Oxygen = 36.79/16 = 2.29

Dividing by the smallest ratio in order to obtain the simplest ratio

Potassium = 1.15/0.57 =2

Sulfur = 0.57/0.57 = 1

Oxygen = 2.29/0.57 = 4

Therefore, the mole ratio of Potassium : Sulfur : Oxygen = 2:1:4

Empirical formula = K₂SO₄

The name of the compound is Potassium tetraoxosulfate (vi)

Question
Which quantity of particles is correctly represented 1 mol of H2?
Solution 1

2647929
842281
748681
586256
406852
368373
348603
324927
199835
130075
112100
106146
77164
23213
22589
19607
17108
13966
10987
3389