CHEMISTRY HIGH SCHOOL

Tobacco's main ingredient is nicotine,alcohol,tar,cigarettes?

Answers

Answer 1
Answer: The correct answer is nicotine. It is the main ingredient in a tobacco. Nicotine is an addictive substance thus overuse of the substance will lead to addiction. It acts as a stimulant and a depressant. Tobacco can be dried for smoking and can also be consumed directly.
Answer 2
Answer:

they are correct, because i had gotten it correct on my test but they are also correct because what they have shown for proof is correct. I had to do research about this in the past, everything they say is 100% correct, and trustworthy.

Hence, the correct answer is nicotine.

Related Questions

According to the Arrhenius theory, when a basedissolves in water it produces (1) CO3 2– as the only negative ion in solution (2) OH– as the only negative ion in solution (3) NH4 + as the only positive ion in solution (4) H+ as the only positive ion in solution
Match each energy source with its description.1. most common renewable energy source 2. depends on time of day and time of year 3. most polluting energy source 4. liquid formed from remains of plants and animals 5. renewable source formed from organic material hydropower coal solar biomass oil
How many joules are needed to warm 45.0 grams of water from 30.0 degrees C to 75.0 degrees C?
Classify each of the following as a suspension, solution, or colloid.
A(n) _____ reaction is a self-sustaining series of chemical reactions in which the product of one reaction are the reactsnts in the next reaction.* not a multiple choice *

49 After decaying for 48 hours, l/16 of the original mass of a radioisotope sample remains unchanged. What is the half-life of this radioisotope?(1) 3.0 h (3) 12 h(2) 9.6 h (4) 24 h

Answers

Answer:

The half life of the radioisotope is 12 hours.

Explanation:

Initial mass of the radioisotope = x

Final mass of  the radioisotope = (1)/(16)* x = 0.0625x

Half life of the radioisotope =t_{(1)/(2)}

Age of the radioisotope = t = 48 hours

Formula used :

N=N_o* e^(-\lambda t)\n\n\lambda =\frac{0.693}{t_{(1)/(2)}}

where,

N_o = initial mass of isotope

N = mass of the parent isotope left after the time, (t)

t_{(1)/(2)} = half life of the isotope

\lambda = rate constant

N=N_o* e^{-((0.693)/(t_(1/2)))* t}

Now put all the given values in this formula, we get

0.0625x=x* e^{-((0.693)/(t_(1/2)))* 48 h}

\ln(0.0625) * (1)/((-0.693* 48 h))=(1)/(t_(1/2))

t_(1/2) = 11.99 hours = 12 hours

The half life of the radioisotope is 12 hours.
1/16 left would imply 4 half lives have passed (1/2 left = 1, 1/4 left = 2, 1/8 left = 3, 1/16 left = 4). So 4 half lives passed in 48 hours, meaning dividing 48 by 4 will give you the length of 1 half life. Which in this case is 12 hours.

How many grams of acetylene react if 1.10 mol of CO2 are produced?

Answers

 Combustion of acetylene :

molar mass acetylene ( C₂H₂ ) = 26.0 g/mol and CO₂ = 44.0 g/mol

2 C₂H₂ + 5 O₂ ---> 4 CO₂ + 2 H₂O

2 moles C₂H₂ --------> 4 moles CO₂
? moles C₂H₂ --------> 1.10 moles CO₂

moles C₂H₂ = 1.10 * 2  / 4

moles C₂H₂ = 0.55 moles of C₂H₂

Mass acetylene:

m = n * mm

m = 0.55 * 26.0

m = 14.3 g

hope this helps!

Which participates in chemical reactions?electrons
protons
neutrons
gamma rays

Answers

I think the correct answer is electrons. All chemical reactions are dependent on the transfer of electrons. Other subatomic particles are located in the innermost portion of an atom and are bonded strongly with each other.

Answer: Option (a) is the correct answer.

Explanation:

A chemical reaction is the reaction that involves gain and loss of electrons due to which there is formation of new compounds or products.

Foe example, HCl + NaOH \rightarrow NaCl + H_(2)O

That is, in chemical reactions change in oxidation state of reactants occur.

Hence, we can conclude that out of the given options electrons participates in chemical reactions.

Describe 3 ways abrasion occurs in nature

Answers

There are three ways of abrasion occurs in nature; the wind, waves, and gravity. Abrasion is the mechanical process of wearing away of a rock surface and the movement of the particles while transporting through the wind, waves, and gravity.

2. 7.5 g of potassium react with water to produce potassium hydroxide and hydrogen gas. Calculate the mass of potassium hydroxide produced. (8 points)

Answers

Answer:

10.7 g of KOH

Explanation:

First of all, we determine the reaction:

2K (s) + 2H₂O(l) → H₂(g) + 2KOH(aq)

We convert the mass of K, to moles → 7.5 g . mol/39.1 g = 0.192 moles

Ratio is 2:2, so the moles I have of K must produce the same moles of KOH. In this case, the produces moles of KOH are 0.192 moles.

We convert the moles to mass, to finish the answer:

0.192 mol . 56.1g /1mol = 10.7 g of KOH

Which of the following would not necessarily indicate a chemical reaction?change in temperature
chemical precipitation of a solid
production of a gas
change in volume

Answers

Answer: Option (d) is the correct answer.

Explanation:

A change that does not cause any difference in chemical composition of a substance are known as physical change.

For example, shape, size, mass, volume, density, etc of a substance are all physical changes.

And, a change that causes changes in chemical composition of a substance is known as chemical change.

For example, precipitation, reactivity, toxicity etc are chemical change.

Therefore, change in temperature, chemical precipitation of a solid, production of a gas are all indications of a chemical change.

Thus, we can conclude that change in volume  would not necessarily indicate a chemical reaction.

Final answer:

Of the options provided, a change in volume would not necessarily indicate a chemical reaction. It could also be a sign of a physical change, such as a change in state.

Explanation:

The question is asking which of the listed factors would not necessarily indicate that a chemical reaction has taken place. From the options provided, a change in volume is not necessarily indicative of a chemical reaction. Other signs (like change in temperature, chemical precipitation of a solid, or production of a gas) are often valid signs of a chemical reaction, however, just a volume change could also be a sign of a physical change, such as a change in state from solid to liquid, or liquid to gas.

For example, when ice melts to water, or water evaporates to steam, it experiences a change in volume. This does not involve the forming or breaking of chemical bonds, thus it's not a chemical reaction, but a physical change.

Learn more about Chemical Reaction here:

brainly.com/question/34137415

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