Chemistry High School

How many moles of Na2SO4 are present in 426.12 grams of Na2SO4? (5 points)

Group of answer choices

2

3

5

6

Answers

Answer 1

Answer: It’s 2.9 moles

Explanation:

Answer 2

Answer:

b) 3

Explanation:

i got it right

Related Questions

What happens to the average kinetic energy at a constant temperature? *

1.it increases
2.it decreases
3.it stays the same
4.it disappears

Answers

The answer is A, it increases.


As the temperature increases, the average kinetic energy increases as does the velocity of the gas particles hitting the walls of the container. The force exerted by the particles per unit of area on the container is the pressure, so as the temperature increases the pressure must also increase.

What unit is used to measure weight?

Answers

newtons
The unit of measurement for weight is that of force, which in the International System of Units (SI) is the newton. For example, an object with a mass of one kilogram has a weight of about 9.8 newtons on the surface of the Earth, and about one-sixth as much on the Moon.

Answer:

The unit is: Newton.

Hope it helps:D

Triphosphorous hexoxide formula

Answers

Answer:

P3O6

Explanation:

Tri=3 Hex=6

Scott and his classmates were looking at an animal cell under a microscope. They are trying to locate the cell's DNA, which is found in its chromosomes. Where should Scott look to find the chromosomes?

In the mitochondria

In the cell nucleus

In the cytoplasm

In the cell vacuole

Answers

Chromosomes are thread-like structures located inside the nucleus of animal and plant cells.

which model of the atom is most accurate?

Answers

Answer:

it's the electron cloud model

A mole of Br2 and a mole of CH2Br2
Select one:

A. have a mass of 1g each

B. contain the same number of molecules

C. contain one molecule each

D. have the same mass

Answers

The answer is A it should be anyway

The term mole is defined as the amount of substance of a system which contains as many elementary entities. A mole of Br₂ and a mole of CH₂Br₂ have a mass of 1g each. Therefore, option A is correct.

What do you mean by mole ?

The term mole is defined as the amount of substance of a system which contains as many elementary entities.

1 mole is equal to 6.023 × 10 ²³ molecules.

One mole of any substance is equal to 6.023 × 10²³ units of that substance such as atoms, molecules, or ions. The number 6.023 × 10²³ is called as Avogadro's number or Avogadro's constant.

The mole concept can be used to convert between mass and number of particles.

A mole of Br₂ and a mole of CH₂Br₂ have a mass of 1g each. Because one mole of substance is equal to 6.023 × 10 ²³ molecules.

Thus, option A is correct.

To learn more about the mole, follow the link;

https://brainly.com/question/26416088

#SPJ5

How many moles of NaCl are in 2.35 liters of a 4.67 M solution?

Answers

There are 10.97 moles of NaCl in 2.35 liters of a 4.67 M solution.

HOW TO CALCULATE NUMBER OF MOLES:The number of moles of a substance can be calculated by multiplying the molarity by the volume. That is;

no. of moles = volume × molarity

According to this question, there are 2.35 liters of a 4.67 M solution. The number of moles is calculated as follows:

no of moles = 2.35L × 4.67M

no of moles = 10.97mol

Therefore, there are 10.97 moles of NaCl in 2.35 liters of a 4.67 M solution.

Learn more about no. of moles at: https://brainly.com/question/14919968

What would be the mass of 3 moles of water molecules?
a
54 grams
b 40 grams
C
30 grams
d 20 grams

Answers

Answer:

[tex]\boxed {\boxed {\sf A. \ 54 \ grams }}[/tex]

Explanation:

To convert from moles to grams, we must use the molar mass.

Recall that water's molecular formula is H₂O. It contains hydrogen and oxygen. Look up the two elements masses on the Periodic Table.

Hydrogen (H): 1.008 g/mol Oxygen (O): 15.999 g/mol

Now, use these masses to find water's mass. The subscript of 2 tells us there are 2 atoms of hydrogen, so we multiply hydrogen's mass by 2 and add oxygen's.

H₂O= 2(1.008 g/mol) + 15.999 g/mol = 18.015 g/mol

Use the molar mass as a ratio.

[tex]\frac{18.015 \ g \ H_2 O}{ 1 \ mol \ H_2 O}[/tex]

Multiply by the given number of moles.

[tex]3 \ mol \ H_2O*\frac{18.015 \ g \ H_2 O}{ 1 \ mol \ H_2 O}[/tex]

The moles of water will cancel.

[tex]3 *\frac{18.015 \ g \ H_2 O}{ 1 }[/tex]

[tex]3 *{18.015 \ g \ H_2 O}[/tex]

[tex]54.045 \ g \ H_2O[/tex]

Round to the nearest whole number. The 0 in the tenth place tells us to leave the number as is.

[tex]54 \ g \ H_2O[/tex]

There are about 54 grams of water in 3 moles.

Answer:

54 grams

Explanation:

First step is to find what one mole of water is in grams.

Water is H2O so that means we have two moles of Hydrogen.

H - 2 grams (on periodic table)

We have one mole of Oxygen.

O - 16 grams (on periodic table)

Add 2 and 16 to get 18 total grams in one molecule of H2O

Now multiply 3 times 18 to know how many grams in 3 moles of H2O

You end with

3x18=54 grams

How did modern scientists experiment with Van Gogh's paints to determine their chemical reactions?
1. They used X-ray analysis.
2. They used litmus testing.
3. They burned the paint to examine what elements were left after the chromium was burned off.
4. They studied the density of modern yellow paint to that of 100-year-old paint.

Answers

Answer:

I think the answer is A - they used X-ray analysis.

Explanation:

Answer:They used X-ray analysis

Explanation:

It’s in the text


PLS HELPPPPPPPPPPPPP

Answers

Answer:

3. Structural features

The answer is the third sentence.
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