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Vinvika [58]
3 years ago
14

Help Please! Fluorine - 19 Atomic number- 9 Atomic mass - 19

Chemistry
1 answer:
PtichkaEL [24]3 years ago
7 0

Answer:

Number of protons is 9

Number of electrons is 9

Number of neutrons is 10

Explanation:

Atomic number refers to the number of protons or electrons in an atom, so the electrons and protons are 9.

Atomic mass is the sum of the number of protons and neutrons.

Therefore, there are 10 neutrons in the atom's nucleus

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2. The volume of a rock is 5 cm' and its mass is 50 g. Find the density.<br> pls help :)
Vladimir [108]

Answer:

<h2>10 g/cm³</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}\\

From the question we have

density =  \frac{50}{5}  = 10 \\

We have the final answer as

<h3>10 g/cm³</h3>

Hope this helps you

5 0
3 years ago
List 5 ways in which gases are helpful to you
Artyom0805 [142]

Here are 5 different types of everyday gases people use.

1. Helium helps us blow up balloons for special occasions.

2. Carbon dioxide gives us carbonated drinks.

3. Oxygen helps us weld materials.

4. Propane helps us start fires, or heats things.

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6 0
4 years ago
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What does an atomic number represent in an atom? number of neutrons number of protons number of electrons number of protons and
mr Goodwill [35]

Answer:

The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

8 0
3 years ago
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Which techniques would be best for separating a
pashok25 [27]

Answer: centrifugation, boiling/heating , and long standing

Explanation:

6 0
3 years ago
A container of gas occupies 3.5 L at 585 mmHg. What would the new pressure be if the volume decreases to 2.0L?
kodGreya [7K]

Answer:

1023.75mmHg

Explanation:

V1 = 3.5L

P1 = 585mmHg

V2 = 2.0L

P2 = ?

To solve this question, we'll require the use of Boyle's law which states that the volume of a fixed mass of gas is inversely proportional to its pressure provided that temperature is kept constant.

Mathematically,

V = kP, k = PV

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P1 × V1 = P2 × V2

Solve for P2,

P2 = (P1 × V1) / V2

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P2 = 2047.5 / 2.0

P2 = 1023.75mmHg

The final pressure of the gas is 1023.75mmHg

5 0
3 years ago
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