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TEA [102]
4 years ago
8

Indicate which bottle contains a pure substance or a mixture

Chemistry
1 answer:
VLD [36.1K]4 years ago
5 0
1 pure substance 2 mixture 3 substance 4 substance
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Determine the volume in liters occupied by 0.030 moles of a gas at STP
vitfil [10]

Answer:

.67 L

Explanation:

.030 mol x 22.4 L / 1 mol = .67 L

22.4 was used because that is what 1 mol equals for a gas at stp.

7 0
3 years ago
Read 2 more answers
A gas sample has a pressure of 2.65 atm when the temperature is -18 ∘C. What is the final pressure, in atmospheres, when the tem
DiKsa [7]

Answer:

P₂ = 3.24atm

Explanation:

7 0
3 years ago
When doing medical research with human subjects, which four limitations are unavoidable?
Fofino [41]

Answer:

Answer

The limitations are-

1. Privacy of the individuals involved in the research process.

2. Physical and psychological risks should be minimized

3. The subjects should be chosen equitably

4. Only reasonable exposure to risks is admissible.

Explanation

The privacy of the individuals involved in the research must be taken into consideration. This will ensure safety of patient data and information. The risk of physical and physiological well being of the person must be taken into consideration in such a research. In addition to that, the subject must be made to understand every procedure and the risks involved before testing. Moreover, only minimal exposure to risks is allowed and must have been previously tested in animals to avoid deaths.

8 0
3 years ago
0.0487 mg + 0.05834 mg + 0.00327 mg
ivolga24 [154]
0.11031 mg
I think that is the answer
6 0
3 years ago
Welding is an industrial process that is used to join pieces of metal. A certain mixture of gases used in welding is composed of
GarryVolchara [31]

The given question is incomplete. The complete question is :

Welding is an industrial process that is used to join pieces of metal. A certain mixture of gases used in welding is composed of carbon dioxide and argon. The partial pressure of carbon dioxide is 0.080 atm and the partial pressure of argon is 0.24 atm. What is the total pressure of the mixture.

Answer:  0.32 atm

Explanation:

According to Dalton's law, the total pressure is the sum of individual pressures.

p_{total}=p_{CO_2}+p_{Ar}

Given : p_{total} =total pressure of gases = ?

p_{CO_2} = partial pressure of carbon dioxide = 0.080 atm

p_{Ar} = partial pressure of argon = 0.24 atm    

putting in the values we get:

p_{total}=0.080atm+0.24atm  

p_{total}=0.32atm

Thus the total pressure of the gases is 0.32 atm

8 0
3 years ago
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