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ivann1987 [24]
3 years ago
13

#1: How many valence electrons are in the outermost shell of all halogens?

Chemistry
1 answer:
Kipish [7]3 years ago
3 0
<span>#1: How many valence electrons are in the outermost shell of all halogens?
</span>c
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1. Patient is admitted with neck injury which has resulted in a loss of function in their thyroid.
Vladimir [108]

Answer:

A. (i think)

Explanation:

3 0
3 years ago
What mineral is usually identified by using the acid test?
podryga [215]
Some rocks contain carbonate minerals, and the acid test can be used to help identify them.
5 0
3 years ago
Use the ideal gas law to calculate the pressure in atmospheres of 0.21 mol of helium (He) at 16°C &amp; occupying 2.53 L. You mu
chubhunter [2.5K]

Answer:

The answer to your question is 2.32 atm

Explanation:

Data

P = ?

n = 0.214

V = 2.53 L

T = 61°C

R = 0.082 atm L/mol°K

Formula

PV = nTR

solve for P

P = nRT/V

Process

1.- Calculate the temperature in K

°K = °C + 273

°K = 61 + 273

    = 334

2.- Substitution

P = (0.214 x 0.082 x 334) / 2.53

3.- Simplification

P = 5.86/2.53

4.- Result

P = 2.32 atm

4 0
3 years ago
Hydrogen is 99% 1H, 0.8% 2H, and 0.2% 3H. Calculate its average atomic mass.
AlekseyPX

The average atomic mass of hydrogen (99% H-1, 0.8% H-2, and 0.2% H-3) is 1.012 amu.    

The average atomic mass of hydrogen can be calculated with the following equation:

A = m_{H-1}\%_{H-1} + m_{H-2}\%_{H-2} + m_{H-3}\%_{H-3}

Where:

m_{H-1}: is the mass of protium (H-1) = 1

m_{H-2}: is the <em>mass</em> of deuterium (H-2) = 2

m_{H-3}: is the <em>mass </em>of tritium (H-3) = 3

\%_{H-1}: is the abundance percent of H-1 = 99%

\%_{H-2}: is the <em>abundance percent</em> of H-2 = 0.8%

\%_{H-3}: is the <em>abundance percent</em> of H-3 = 0.2%

The average atomic mass is:

A = 1*99\% + 2*0.8\% + 3*0.2\%

Changing all the <u>percent values</u> into <u>decimal ones</u>, we have:

A = 0.99 + 2*0.008 + 3*0.002 = 1.012

Therefore, the average atomic mass of hydrogen is 1.012 amu.

Learn more about average atomic mass here brainly.com/question/8575403?referrer=searchResults

I hope it helps you!

6 0
2 years ago
Is the following equation balanced? Why or why not?<br> 2H2 +02 → 2H,0
Natasha2012 [34]

Answer:

Yes

Explanation:

It is balanced because On both sides there are 4 hydrogen atoms and 2 oxygen atoms, or in this case, 2 molecular hydrogens and 1 molecular oxygen, which made hydric acid, aka dihydrogen monoxide, or universally, as water.

3 0
3 years ago
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