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hjlf
3 years ago
6

Which of the following substances found in tobacco smoke stimulates the brain? A. acetone B. toluene C. nicotine D. ammonia Plea

se select the best answer from the choices provided. A B C D
Chemistry
2 answers:
Vaselesa [24]3 years ago
7 0

The answer is C. Nicotine is the substance found in tobacco smoke that stimulates the brain.

bekas [8.4K]3 years ago
3 0

Answer:

C. nicotine

Explanation:

Nicotine is a derivative of tobacco, it can be found in smoke and stimulates the brain. It is produced by burning cigarettes and is the main cause of the dependence that the smoker presents. This is because, when you take a cigarette, nicotine reaches the brain in about 9 seconds and acts on the central nervous system, causing a pleasant feeling of well-being. However, this sensation is transient and the more one smokes the more the body adapts to the drug and the addiction increases, requiring more doses of nicotine in the body, ie increasing the amount of cigarettes consumed.

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A gas occupies a volume of 180 mL at 35oC and 740 mmHg. What is the volume of the gas at STP?
Tasya [4]

Answer:

there you go

Explanation:

6 0
3 years ago
A sample of ammonia gas at 75°c and 445 mm hg has a volume of 16.0 l. what volume will it occupy if the pressure rises to 1225 m
ioda
In this kind of exercises, you should  use the "ideal gas" rules: PV = nRT
P should be in Pascal: 
445mmHg = 59328Pa
1225mmHg = 163319Pa

V should be in cubic meter:
16L = 0.016 m3

R = \frac{PV}{nT} = constant
\frac{P1 V1}{n T} = \frac{P2 V2}{n T}
==> P1 * V1 = P2 * V2
V2 = \frac{P1 V1}{P2} = \frac{445 0.016}{1225}
V2 = 0.00581 m3 = 5.81 L


7 0
3 years ago
A 47.0 mL aliquot of a 0.400 M stock solution must be diluted to 0.100 M. Assuming the volumes are additive, how much water shou
mel-nik [20]

Answer:

The answer is 0.188L

Explanation:

I did the problem on paper and put the answer on the pictures. I'm sorry if I didn't explain it well but I hope I helped.

5 0
3 years ago
Some carpets have thin copper wires running through them. The student is less
Luba_88 [7]

Answer:

See below.

Explanation:

Because copper is a very good conductor of electricity so it will likely conduct any electricity away from the person.

8 0
3 years ago
Read 2 more answers
What are the steps to measure the density of a solid?
JulsSmile [24]

Answer:

Look below

Explanation:

The formula for density is:

Density=\frac{mass}{volume}

Therefore in order to find the density of a solid, you must find the mass and the volume first.

To find the mass, you can use a scale.

To find the volume, you can use the water displacement method. For example, if you fill the water of a graduated cylinder to 10 mL, and then you put a rock inside, and it rises to 15 mL, then the volume (of the rock) is 15mL-10mL=5mL.

4 0
2 years ago
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