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san4es73 [151]
3 years ago
6

If you have 3.0 liters of an unknown gas, at standard temperature and pressure conditions, then you can calculate what about tha

t gas?
mass

density

moles of representative particles

mass and moles of representative particles
Chemistry
2 answers:
Ivenika [448]3 years ago
5 0
Density I'm pretty sure
EastWind [94]3 years ago
4 0

Hello!

<u><em>Answer: second option b density.</em></u>

____________________________________________________________

Explanation:

↓↓↓↓↓↓↓↓↓

Density is the amount of mass in a given volume. Density is the ratio of mass to volume. It's a derived unit of measure. It's equal to mass divided by the volume. It's measured in units such as grams per cubic centimeter and grams per milliliter.

Density formula:

↓↓↓↓↓↓↓↓

D=\frac{M}{V}

________________________________________________________________

Hope this helps!

Thank you for posting your question at here on brainly.

Have a great day!

-Charlie

_______________________________________________________________

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Purification of copper can be achieved by electrorefining copper from an impure copper anode onto a pure copper cathode in an el
Likurg_2 [28]

Answer: 281 hours

Explanation:-

1 electron carry charge=1.6\times 10^{-19}C

1 mole of electrons contain=6.023\times 10^{23} electrons

Thus  1 mole of electrons carry charge=\frac{1.6\times 10^{-19}}{1}\times 6.023\times 10^{23}=96500C

Cu^{2+}+2e^-\rightarrow Cu

96500\times 2=193000Coloumb of electricity deposits 1 mole or 63.5 g of copper

0.0635 kg of copper is deposited by 193000 Coloumb

11.5 kg of copper is deposited by=\frac{193000}{0.0635}\times 11.5=34952756 Coloumb

Q=I\times t

where Q= quantity of electricity in coloumbs  = 34952756 C

I = current in amperes = 34.5 A

t= time in seconds = ?

34952756 C=34.5A\times t

t=1013123sec=281hours

Thus it will take 281 hours to plate 11.5 kg of copper onto the cathode if the current passed through the cell is held constant at 34.5 A.

8 0
3 years ago
I Will Mark Brainiest I Will Give 100 POINTS
LUCKY_DIMON [66]

Answer:

it is a or d

Explanation:

3 0
2 years ago
How do you answer this? does anyone know the equation you use?​
bonufazy [111]

number 18 is 40.3kj/mol

6 0
3 years ago
hich of the followings decrease the affinity of adult Hb with O2? A. 2,3 BPG B. hydrogen ion C. CO2 D. Ferrous ion
Ivahew [28]

Answer:

A. 2,3 BPG

Explanation:

2,3-bisphosphoglycerate (BPG), otherwise known as 2,3-DPG, enables the transition of hemoglobin from a very high-oxygen-affinity state to a reduced-oxygen-affinity state.

Tissues hemoglobin oxygen affinity is reduced by numerous physiological factors including.

1. Temperature Increased,

2. Carbon dioxide,

3. Acid and

4. 2,3-Bisphosphoglycerate (2,3-BPG)

all of which can contribute to decrease the oxygen affinity of hemoglobin which favours unloading and increased oxygen availability to our body cells.

3 0
3 years ago
what is the concentration (molarity) of a solution where 149g of kcl is dissolved in enough water to get a total volume of the s
Anit [1.1K]
Molar mass KCl = 74.55 g/mol

Number of moles:

mass KC / molar mass

149 / 74.55 => 1.998 moles 

Volume in liters: 500 mL / 1000 => 0.5 L 

Therefore:

M = moles / volume

M = 1.998 / 0.5

M = 3.996 mol/L⁻¹
4 0
3 years ago
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