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KatRina [158]
2 years ago
15

What is the change on the subatomic particles represented in Figure 4-3? Assuming all the particles in the nucleus are visible,

what are the atomic and mass numbers of the atom shown?

Chemistry
2 answers:
Temka [501]2 years ago
8 0

Explanation:

Atomic number means the number of protons an atom holds. Whereas mass number equals (number of protons + number of neutrons).

The given figure shows that there are 9 neutrons and 8 protons.

Therefore,

 mass number of the atom = number of protons + number of neutrons

                             = 8 + 9

                             = 17

Hence, mass number of the atom is 17 and atomic number of the atom is 8.

drek231 [11]2 years ago
4 0
I'm assuming you mean the charge on the subatomic particles shown
Protons have a positive charge
Neutrons have a negative charge
There are 8 protons shown and 9 neutrons
Atomic number is the number of neutrons so 8, and mass number is number of neutrons+number of protons because they each have a mass of 1. so 8+9=17
Atomic number = 8
Mass number = 17
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Describe two situations in which you observed or performed an energy transformation. For each situation, name the starting form
Inessa05 [86]

Answer:

The Sun transforms nuclear energy into heat and light energy.

Our bodies converting chemical energy in our food into mechanical energy for us to be able to move.

An electric fan transforming electrical energy into kinetic energy.

8 0
3 years ago
The low-grade iron ore taconite, which contains Fe3O4, is concentrated and made into pellets for processing. If one ton of tacon
xenn [34]

<u>Answer:</u> The percent composition of Fe_3O_4 in taconite is 37.6 %.

<u>Explanation:</u>

We are given:

Mass of taconite pellets = 1 ton = 907185 g      (Conversion factor: 1 ton = 907185 g)

Mass of iron produced = 545 lb = 247212 g    (Conversion factor:  1 lb = 453.6 g )

We know that:

Molar mass of iron = 55.85 g/mol

Molar mass of Fe_3O_4 = 231.53 g/mol

1 mole of Fe_3O_4 contains 3 moles of iron atom and 4 moles of oxygen atom

(3 × 55.85) = 167.55 g of iron is produced from 231.53 grams of Fe_3O_4

So, 247212 grams of iron will be produced from = \frac{231.53}{167.55}\times 247212=341611.43g of Fe_3O_4

To calculate the percentage of Fe_3O_4 in taconite, we use the equation:

\%\text{ composition of }Fe_3O_4=\frac{\text{Mass of }Fe_3O_4}{\text{Mass of taconite}}\times 100

Mass of taconite = 907185 g

Mass of Fe_3O_4 = 341611.43 g

Putting values in above equation, we get:

\%\text{ composition of }Fe_3O_4=\frac{341611.43g}{907185g}\times 100=37.6\%

Hence, the percent composition of Fe_3O_4 in taconite is 37.6 %.

8 0
3 years ago
Light travels in _______.
Thepotemich [5.8K]
Should be C. I think
7 0
2 years ago
Thousand of molecules are called​
kozerog [31]

Answer:

monomers

Explanation:

Thousands of molecules are called monomers

6 0
3 years ago
Express the following numbers as decimals: (a) 1.52 x 10^-2, (b) 7.78 x 10^-8, (c) 1 x 10^-6, (d) 1.6001 x 10^3.
Alchen [17]

Answer :

(a) 0.0152

(b) 0.0000000778

(c) 0.000001

(d) 1600.1

Explanation :

Scientific notation : It is the representation of expressing the numbers that are too big or too small and are represented in the decimal form with one digit before the decimal point times 10 raise to the power.

For example :

5000 is written as 5.0\times 10^3

889.9 is written as 8.899\times 10^{-2}

In this examples, 5000 and 889.9 are written in the standard notation and 5.0\times 10^3  and 8.899\times 10^{-2}  are written in the scientific notation.

(a) 1.52\times 10^{-2}

The standard notation is, 0.0152

(b) 7.78\times 10^{-8}

The standard notation is, 0.0000000778

(c) 1\times 10^{-6}

The standard notation is, 0.000001

(d) 1.6001\times 10^{3}

The standard notation is, 1600.1

5 0
3 years ago
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