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2 years ago

Which term best describes a unit of carbon dioxide?

Chemistry

1 answer:

Lelechka [254]2 years ago

7 0

Answer:

Molecule.

Explanation:

carbon and fluorine. Based on the bonding, a unit of carbon dioxideis described as a molecule.

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How many covalent bonds are in a nitrogen molecule?

makvit [3.9K]

3 covalent bonds (there are 2 electrons in the first orbital and 5 in the second. You still have room for three more)

7 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

Miss White wants to make a (decidedly not poisoned) apple pie. The recipe she is

Rina8888 [55]

So you have to multiply 786,3 times 0.98 to get the mass the mass is 770.57 if u round its 770.6 or 771

5 0

3 years ago

A sample of nitrogen occupies 10.0 liters at 25°C and 98.7 kPa. What would be the volume at 20°C and 102.7 kPa?

krek1111 [17]

To solve the problem, we assume the sample to be ideal. Then, we use the ideal gas equation which is expressed as PV = nRT. From the first condition of the nitrogen gas sample, we calculate the number of moles.

n = PV / RT
n = (98.7x 10^3 Pa x 0.01 m^3) / (8.314 Pa m^3/ mol K) x 298.15 K
n = 0.40 mol N2

At the second condition, the number of moles stays the same however pressure and temperature was changed. So, the new volume is calculated as follows:

V = nRT / P
V = 0.40 x 8.314 x 293.15 / 102.7 x 10^3
V = 9.49 x 10^-3 m^3 or 9.49 L

7 0

3 years ago

A screw decreases the amount of work done.<br><br> True<br> False

victus00 [196]

Answer:

tru

Explanation:

4 0

3 years ago

Read 2 more answers