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Pani-rosa [81]
3 years ago
12

Help me pls its chemistry

Chemistry
1 answer:
saul85 [17]3 years ago
8 0

B to C:-

  • The temperature remains constant from B to C in any time interval .
  • Looking at the graph there is BC || x axis.
  • Hence temperature remains unchanged.

E to D:-

  • Here also the temperature remains constant.
  • As we can see ED|| x axis
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Calculate the amount of heat required for the evaporation of 105.0 g of water at 100.0 c
son4ous [18]
To determine the amount of heat needed to evaporate a certain amount of water at its boiling point, we use the equation,

                  H = m(Hv)

where H is the heat, m is the mass (in grams), and Hv is the latent heat of vaporization. Substituting the known values,

                 H = (105 g)(540 cal/g)

                  H = 56700 cal

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Answer: 56.7 kcal
8 0
4 years ago
1) if I have a 30 mole sample of gas at a temperature of 120˚C, and a volume of 300 L. What is the pressure of the gas on the co
vivado [14]

Answer:

P = 3.23 atm

Explanation:

Given data:

Number of moles of gas = 30 mol

Temperature = 120°C

Volume of gas = 300 L

Pressure of gas = ?

Solution:

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

120+273.15 = 393.15 K

P × 300 L = 30 mol × 0.0821 atm.L/mol.K × 393.15 K

P = 968.33 atm. L /300 L

P = 3.23 atm

3 0
3 years ago
In science, observations are objective, but intereroes are subjective. True or False?
Fed [463]

Answer:

the answer is False I hope this helps

8 0
3 years ago
What shows the substance at the highest temperature?
Tcecarenko [31]

Answer:

needs more information

Explanation:

6 0
3 years ago
Read 2 more answers
Which describes the normal boiling point of a substance?
kicyunya [14]

Answer:

I think it's D

Explanation:

I'm so sorry if that's wrong, hope it helps!

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