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Arturiano [62]
3 years ago
11

Given the atomic

Chemistry
2 answers:
e-lub [12.9K]3 years ago
8 0
<h3>Answer: Choice A) fluorine</h3>

Explanation:

The notation ^{19}_9X refers to some element X that has 9 protons and 19 protons and neutrons (so that means 19-9 = 10 neutrons). The element that has 9 protons is fluorine (symbol F on the periodic table)

This means ^{19}_9X would update to ^{19}_9F

Ivan3 years ago
6 0

Answer:

a

Explanation:

its electron arrangements is 9

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A solution is considered neutral if its pH is _________ 7.
liraira [26]
When the solution has a ph equal to 7
7 0
3 years ago
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Choose the aqueous solution that has the highest boiling point. These are all solutions of nonvolatile solutes and you should as
FrozenT [24]

Answer:

0.100 M AlCl₃

Explanation:

The variation of boiling point by the addition of a nonvolatile solute is called ebullioscopy, and the temperature variation is calculated by:

ΔT = W.i

Where W = nsolute/msolvent, and i is the Van't Hoff factor. Because all the substances have the same molarity, n is equal for all of them.

i = final particles/initial particles

C₆H₁₂O₆ don't dissociate, so final particles = initial particles => i = 1;

AlCl₃ dissociates at Al⁺³ and 3Cl⁻, so has 4 final particles and 1 initial particle, i = 4/1 = 4;

NaCl dissociates at Na⁺ and Cl⁻ so has 2 final particles and 1 initial particle, i = 2/1 = 2;

MgCl₂ dissociates at Mg⁺² and 2Cl⁻, so has 3 final particles and 1 initial particle, i = 3/1 = 3.

So, the solution with AlCl₃ will have the highest ΔT, and because of that the highest boiling point.

8 0
3 years ago
Dwayne filled a small balloon with air at 298.5 K. He put the balloon into a bucket of water, and the water level in the bucket
Tcecarenko [31]

Answer : The volume of the balloon will be, 0.494 liters

Solution :

Charles' Law : It is defined as the volume of the gas is directly proportional to the temperature of the gas at constant pressure and number of moles.

V\propto T

or,

\frac{V_1}{T_1}=\frac{V_2}{T_2}

where,

V_1 = initial volume of gas = ?

V_2 = final volume of gas = 0.54 L

T_1 = initial temperature of gas = 273.15 K

T_2 = final temperature of gas = 298.5 K

Now put all the given values in the above equation, we get the initial volume of balloon.

\frac{V_1}{273.15K}=\frac{0.54L}{298.5K}

V_1=0.494L

Therefore, the volume of the balloon will be, 0.494 liters

5 0
3 years ago
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How many atoms of aluminum are produced from 239.0 grams of iron? Give your answer in Scientific Notation.
Furkat [3]

Answer:

I dont know

Explanation:

I have it for a science final

4 0
3 years ago
How do you determine the theoretical number of electrons in an energy level?
Makovka662 [10]
I'm pretty sure the formula is 2n(/\) 2
3 0
3 years ago
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