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Len [333]
2 years ago
12

8. (02.04 MC)

Chemistry
1 answer:
elena55 [62]2 years ago
3 0

Answer:

3p^2

Explanation:

after filling 3s^2 only two electrons  left out of 14 so the next sub shell is 3p therefore ,X represents 3p^2

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If you have one mole of a gas at 3.00 atm in a 3.0 L container what is the temperature of the gas?
vaieri [72.5K]

Answer:

n = 3.0 moles

V = 60.0 L

T = 400 K

From PV = nRT, you can find P

P = nRT/V = (3.0 mol)(0.0821 L-atm/K-mol)(400 K)/60.0L

P = 1.642 atm = 1.6 atm (to 2 significant figures)

Explanation:

6 0
3 years ago
If 44.7 g of KCI (MM = 74.55 g/mol) are added to a 500.0 mL volumetric flask, and water is added to fill the flask, what is the
navik [9.2K]

1.199 M is the concentration of KCI in the resulting solution.

<h3 /><h3>What are moles?</h3>

A mole is defined as 6.02214076 × 10^{23} of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

No.of moles of KCI

Moles = \frac{mass}{molar \;mass}

Moles = \frac{44.7 g}{74.5513 g/mol}

= 0.599 moles

Vol.of the solution,V= 500 ml

= 0.5 liter

Molarity

Molality = \frac{Moles \;solute}{Volume \;of \;solution \;in \;litre}

Molality = \frac{0.599 moles}{0.5 liter}

= 1.199 M

Hence, 1.199 M is the concentration of KCI in the resulting solution.

Learn more about moles here:

brainly.com/question/8455949

#SPJ1

6 0
2 years ago
A scientist is observing a cell in notices the presence of starch what does this tell her about the cell
Harman [31]
The answer would be : 

 It is a plant cell because starch is the energy storing molecule in plant cells.

Hope this helps !

Photon
6 0
3 years ago
Can you plss help me in this question​
Rashid [163]

Answer:

state changes

7 0
3 years ago
The law of conservation of mass states that in a chemical reaction, mass is neither created nor destroyed. that means, the total
g100num [7]
Well all reactions need energy to start it. The light is the energy that the reaction requires to start it. Sunlight also has no mass in the first place so laws of conservation of mass don't apply to it.

5 0
4 years ago
Read 2 more answers
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