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grigory [225]
2 years ago
14

How many molecules of dinitrogen pentoxide are in 0.27 moles of dinitrogenpentoxide?​

Chemistry
1 answer:
ludmilkaskok [199]2 years ago
4 0

Answer:

1.6 × 10²³ molecules of N2O5

Explanation:

To find the amount of molecules from the amount of moles of a substance we simply multiply the amount of moles by Avagadro's number.

0.27mol × 6.02×10²³ = 1.6 × 10²³ molecules of N2O5

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I'm stuck on this assignment, +20 PTS and BRAINLIEST for step by step:
dolphi86 [110]

Answer:

2. 2.74 L

3. 488 K

4. 7.47 L

5. 38.6 L

6. 2.85 mol

7. 319 K

8. 3.43 kPa

Explanation:

Generally speaking, you want to convert units to SI units, but in this case, we are working with ratios.  This makes up for using the units that wouldn't appropriate elsewhere.

2.  Use the equation P₁V₁ = P₂V₂.  Solve for V₂.  

(3.05 L)(870 kPa) = (969 kPa)(V₂)  

V₂ = 2.74 L.  

3.  Use the equation V₁/T₁ = V₂/T₂. Solve for T₂.  

(3.32 L)/(360 K) = (4.50 L)/(T₂)  

T₂ = 488 K.

4.  Do the same as above, but for V₂.  

(5.10 L)/(-56°C) = V₂/(-82°C)  

V₂ = 7.47 L

5.  Use the equation V₁/n₁ = V₂/n₂.  Solve for V₂.  

(37.2 L)/(0.750 mol) = (V₂)/(0.778 mol)  

V₂ = 38.6 L

6.  Do the same as above, but for n₂.

(86.0 L)/(2.65 mol) = (92.5 L)(n₂)  

n₂ = 2.85 mol

7.  Use the equation P₁/T₁ = P₂/T₂.  Solve for T₂.  

(3.00 atm)/(390 K) = (2.45 atm)/(T₂)  

T₂ = 319 K

8.  Do the same as above, but for P₂.  

In this specific case, however you will need to convert units.  Since both temperatures don't have the same sign, the ratio won't come out right.  Convert to Kelvin.  Add 273.15 to the temperature in Celsius to convert to Kelvin -12.3°C = 260.85 K  25°C = 298.15 K.

(3.00 kPa)/(260.85 K) = P₂/(298.15 K)

P₂ = 3.43 kPa

There is a lot in here... If you are confused about something, let me know!

6 0
3 years ago
Fill a glass jar with water. Put the jar in a place where it will not be moved. Gently put 2 drops of food coloring into the wat
aleksandrvk [35]

Answer:

A. Whatever is in the water, it moves. Even if a block is placed in there, it would move by sinking to the bottom. If a plastic bag was placed in there, it wouldn't sink but move a little.

4 0
3 years ago
Read 2 more answers
During which step in the pcr cycle do primers form bonds with a single-stranded template?.
shutvik [7]
Answer: The first steps

Explanation: science
5 0
2 years ago
In which situation has the independent variable for the experiment been changed?
ki77a [65]
Idk cause I’m not completely sure I apologize
7 0
2 years ago
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Can anyone help with this? please
Sloan [31]

Answer:

Volume of solution = 80.5 mL

Explanation:

Given data:

Molarity  of solution = 4.50 mol/L

Mass of ethanol = 16.7 g

Volume of solution = ?

Solution:

Volume will be calculated from molarity formula.

Molarity  = number of moles / volume in L

Number of moles:

Number of moles = mass/molar mass

Number of moles = 16.7 g/ 46.07 g/mol

Number of moles = 0.3625 mol

Volume of solution:

Molarity  = number of moles / volume in L

4.50 mol/L = 0.3625 mol / volume in L

Volume in L =  0.3625 mol /4.50 mol/L

Volume in L = 0.0805 L

Volume in mL:

0.0805 L ×1000 mL/1 L

80.5 mL

3 0
2 years ago
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