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Gemiola [76]
3 years ago
15

Calculate the density of CO2 in g/cm3 at room temperature(25 degrees Celsuis) and pressure(1 atm) assuming it acts as an ideal g

as
Chemistry
1 answer:
Readme [11.4K]3 years ago
8 0

Answer:

density=1.8x10^{-3}g/mL

Explanation:

Hello,

Considering the ideal equation of state:

PV=nRT

The moles are defined in terms of mass as follows:

n=\frac{m}{M}

Whereas M the gas' molar mass, thus:

PV=\frac{mRT}{M}

Now, since the density is defined as the quotient between the mass and the volume, we get:

P=\frac{m}{V} \frac{RT}{M}

Solving for m/V:

density= m/V=\frac{PM}{RT}

Thus, the result is given by:

density=\frac{(1atm)(44g/mol)}{[0.082atm*L/(mol*K)]*298.15K} \\density=1.8g/L=1.8x10^{-3}g/mL

Best regards.

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5 0
2 years ago
The nutrition label on the back of a package of hotdogs (purchased within the US) indicates that one hotdog contains 100 calorie
Olenka [21]

Answer:

C. 100

Explanation:

Biochemical researches and studies have found out that an average health hotdog has a calorie of between 100 and 150 which is usually dependent on the additives.

Since the nutrition label on the back of a package of hotdogs (purchased within the US) indicates that one hotdog contains 100 calories then it truly contains such amount of calories. The standard number of calories present in a hotdog is independent of the amount eaten by individuals.

5 0
3 years ago
The H⁺ concentration in an aqueous solution at 25 °C is 9.1 × 10⁻⁴. What is [OH⁻]?
Vinvika [58]

Steps:-

  • First we calculate pH then pOH then [OH-]

\\ \tt\rightarrowtail pH=-log[H^+]

\\ \tt\rightarrowtail pH=-log[9.1\times 10^{-4}]

\\ \tt\rightarrowtail pH=-log9.1-log10^{-4})

\\ \tt\rightarrowtail pH=0.95+4

\\ \tt\rightarrowtail pH=4.95

Now

\\ \tt\rightarrowtail pH+pOH=14

\\ \tt\rightarrowtail pOH=14-4.95

\\ \tt\rightarrowtail pOH=9.05

So

\\ \tt\rightarrowtail -log[OH^-]=9.05

\\ \tt\rightarrowtail log[OH^-]=-9.05

\\ \tt\rightarrowtail OH^-=10^{-9.05}

\\ \tt\rightarrowtail OH^-=8.91\times 10^{-4}

5 0
2 years ago
What is the advantage of seeds that can be spread over a wide area?
Tema [17]

Answer:

I'm fairly sure it's D

Explanation:

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6 0
3 years ago
The temperature of a sample of water changes from 10°C to 20°C when the water absorbs 100 calories of heat. What is the mass of
Vlad1618 [11]

Answer:

10 g

Explanation:

Right from the start, just by inspecting the values given, you can say that the answer will be  

10 g

.

Now, here's what that is the case.

As you know, a substance's specific heat tells you how much heat is needed to increase the temperature of  

1 g

of that substance by  

1

∘

C

.

Water has a specific heat of approximately  

4.18

J

g

∘

C

. This tells you that in order to increase the temperature of  

1 g

of water by  

1

∘

C

, you need to provide  

4.18 J

of heat.

Now, how much heat would be required to increase the temperature of  

1 g

of water by  

10

∘

C

?

Well, you'd need  

4.18 J

to increase it by  

1

∘

C

, another  

4.18 J

to increase it by another  

1

∘

C

, and so on. This means that you'd need

4.18 J

×

10

=

41.8 J

to increase the temperature of  

1 g

of water by  

10

∘

C

.

Now look at the value given to you. If you need  

41.8 J

to increase the temperature of  

1 g

of water by  

10

∘

C

, what mass of water would require  

10

times as much heat to increase its temperature by  

10

∘

C

?

1 g

×

10

=

10 g

And that's your answer.

Mathematically, you can calculate this by using the equation

q

=

m

⋅

c

⋅

Δ

T

 

, where

q

- heat absorbed/lost

m

- the mass of the sample

c

- the specific heat of the substance

Δ

T

- the change in temperature, defined as final temperature minus initial temperature

Plug in your values to get

418

J

=

m

⋅

4.18

J

g

∘

C

⋅

(

20

−

10

)

∘

C

m

=

418

4.18

⋅

10

=

10 g

5 0
2 years ago
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