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Fantom [35]
3 years ago
13

What is the answer for chemestry when it says 1.204 times 10^24

Chemistry
1 answer:
Sphinxa [80]3 years ago
6 0

Answer: This is called moles

Explanation:  This is described to be the number of molecules, atoms or ions in a substance :)

You might be interested in
B. Why is this number called a "mass” number?
deff fn [24]

<u>Answer:</u>

The mass of the atom depends on the sub atomic particles present in the nucleus of an atom.

That is, the protons and the neutrons.

Electrons are present around the nucleus and the mass is negligible since its mass is very very less.

<em>mass of a proton = 1.673\times10^{-27} kg</em>

<em>mass of a neutron = 1.675 \times 10^{-27} kg</em>

<em>mass of an electron = 9.109 \times 10^{-31} kg</em>

Mass number represents the mass of one particular isotope and it is a whole number for example, _6 C^{13}

Mass number is 13 and atomic number is 6 for the carbon isotope C-13.  

Atomic mass is different from mass number and it is a fraction since it is the average atomic mass of all the isotopes of an atom.

Atomic mass of C is 12.011 amu which we see in the periodic table is the average atomic mass of isotopes C-12, C-13 and C-14.

7 0
3 years ago
What is the mole fraction of NaOH in an aqueous solution that
astraxan [27]

Answer:

The mole fraction of NaOH in an aqueous solution that contain 22.9% NaOH by mass=0.882

Explanation:

We are given that

Aqueous solution that contains 22.9% NaOH by mass means

22.9 g NaOH in 100 g solution.

Mass of NaOH(WB)=22.9 g

Mass of water =100-22.9=77.1

Na=23

O=16

H=1.01

Molar mass of NaOH(MB)=23+16+1.01=40.01

Number of moles =\frac{Given\;mass}{Molar\;mass}

Using the formula

Number of moles of  NaOH(n_B)=\frac{W_B}{M_B}=\frac{22.9}{40.01}

n_B=0.572moles

Molar mass of water=16+2(1.01)=18.02g

Number of moles of water(n_A)=\frac{77.1}{18.02}

n_A=4.279 moles

Now, mole fraction of NaOH

=\frac{n_B}{n_B+n_A}

=\frac{4.279}{0.572+4.279}

=0.882

Hence, the mole fraction of NaOH in an aqueous solution that contain 22.9% NaOH by mass=0.882

4 0
3 years ago
Identify the type of igneous rock that is formed when magma cools above Earth's surface?
mylen [45]

Answer: cools down and keeps going

Explanation:

5 0
3 years ago
When an object falls to the ground, potential energy is most likely transformed into
pentagon [3]

Answer:

kinetic energy

Explanation:

When the object is released, the gravitational potential energy is gradually converted into kinetic energy as it picks up speed.

8 0
3 years ago
What’s the most density thing out of
Oksanka [162]

Answer:

Iron is the densest out of the given options.

Explanation:

Oxygen

1.429 g/L

Water

1000 g/L

Hydrogen Peroxide

1450 g/L

Iron

7874 g/L

Iron Oxide

5240 g/L

7 0
3 years ago
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