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2 years ago

Chuck wants to know how many electrons in an atom are not paired up. Which model would be best for Chuck to

Chemistry

1 answer:

loris [4]2 years ago

4 0

Answer:

D. an orbital notation of the atom

Explanation:

Orbital notiation uses lines and arrows to show shells, subshells, and orbitals for electrons in an atom. Since it shows arrows being paired up in this diagram it would be the best model for Chuck to use.

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Question 2 (Multiple Choice Worth 2 points)

faust18 [17]

Answer:

$\pi$ r² x h

Explanation:

A can is cylindrical in nature. Using the formula of the volume of the can, we can find this unknown volume.

The volume of cylinder is given as:

Volume of a cylinder = Area x height

Volume of a cylinder = $\pi$ r² x h

Therefore density of the can;

Density = $\frac{mass}{volume}$

6 0

3 years ago

Can you answer all of the questions plz

NARA [144]

No..............................

3 0

3 years ago

Read 2 more answers

If a climate scientist says, "The CO2 concentration in 2018 was 407.4 ppm." What do they mean? *

Alinara [238K]

Answer:

Ppm means the concentration of vapors or gases expressed in parts per million of polluted air.

Explanation:

In Chemistry and Physics, part per million or PPM is a measure that expresses the number of units of a certain existing substance for every million units of the mixture. (Concentration)

In climate the equation is used so:

ppm = parts of polluted air / million parts of air .

ppm = Liters of polluted air / 10∧6 Liters of air.

This is used to find the concentration of gases expressed as parts of gas per million parts of the

polluted air.

In this case, it would be 407.4L of CO2 per 10∧6L of air.

6 0

3 years ago

HELPPPPPP PLZZZZZ! FILE ATTACHED BELOW! ASAP PLZZZ!

baherus [9]

90 would be my guess.

4 0

3 years ago

A gas evolved during the fermentation of alcohol had a volume of 19.4 L at 17 °C and 746 mmHg. How many moles of gas were collec

AlexFokin [52]

Answer:- 0.800 moles of the gas were collected.

Solution:- Volume, temperature and pressure is given for the gas and asks to calculate the moles of the gas.

It is an ideal gas law based problem. Ideal gas law equation is used to solve this. The equation is:

PV=nRT

Since it asks to calculate the moles that is n, so let's rearrange this for n:

$n=\frac{PV}{RT}$

V = 19.4 L

T = 17 + 273 = 290 K

P = 746 mmHg

we need to convert the pressure from mmHg to atm and for this we divide by 760 since, 1 atm = 760 mmHg

$P=746mmHg(\frac{1atm}{760mmHg})$

P = 0.982 atm

R = $0.0821\frac{atm.L}{mol.K}$

Let's plug in the values in the equation to get the moles.

$n=\frac{0.982atm*19.4L}{0.0821\frac{atm.L}{mol.K}*290K}$

n = 0.800 moles

So, 0.800 moles of the gas were collected.

4 0

3 years ago