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Mekhanik [1.2K]
3 years ago
10

List 10 examples of substances that are beneficial in small quantities but poisonous in large doses

Chemistry
2 answers:
Inga [223]3 years ago
8 0

Answer:

Explanation:

Poisons are substances that can be deadly. They are chemicals that are either produced naturally or are manufactured. It also depends on a number of things – most importantly the amount of the substance absorbed, ingested or inhaled. Below are examples of substances which are beneficial in small quantities but poisonous in large doses.

1. Oxygen: Too much oxygen (vital for life) results in cell damage and can lead to death (oxygen toxicity).

2. Common Salt: Ingestion of common salt (sodium chloride) is essential for human health in small doses but may be harmful in large doses. It can cause high blood pressure and can lead to strokes or cardiovascular disease.

3. Paracetamol: Paracetamol is commonly used for pain relief and to reduce fever in small doses, but in larger doses, it causes liver damage and can lead to death.

4. Alcohol: Alcohol is a psychoactive drug that has a depressant effect. It is often consumed because of its calming effects, and it can make people feel more sociable. In large doses, alcohol is harmful and can cause acute alcohol poisoning.

5. Polyphenols present in plants we eat are toxic in large amounts, but in small amounts, they are beneficial.

6. Fertilizers: In agriculture, fertilizers are use to increase crop production but in large quantities can cause damage to crops.

7. Pesticides: Pesticides are use to control pest that hinder plants growths but in large doses can cause damage to plants.

Some toxins and toxic substances in small doses can be beneficial. Toxins often occur naturally in food, but in small doses, they are fine and even beneficial. Certain toxins in small doses are used as medications to heal us when we are sick. Other toxic substances are used as:

8. Sweeteners

9. Preservatives

10. Dyes and cleaning agents

Sveta_85 [38]3 years ago
5 0
Answer:

Following Ten compounds are benificial in small quantity but poisonous at higher concentration.

                         1) Iron

                         2) Oxygen

                         3) Vitamin A

                         4) Vitamin D

                         5) Table Salt

                         6) Ethanol 

                         7) Amygdalin (found in apple)

                         8) Solanin (found in potato)

                         9) Formaldehyde (found in pears)

                         10) Cucurbitacin E (found in Cucumber)
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Which equation is NOT balanced?
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Answer:

C

Explanation

On the reactants side there is 4 Hydrogen atoms in total and two oxygen atoms on the left however on the right there is two hydrogen atoms and one oxygen atom. Leaving this equation unbalanced

3 0
3 years ago
Naturally occurring silicon has an atomic mass of 28.086 and consists of three isotopes. The major isotope is 28Si, natural abun
Elden [556K]

Answer:

29Si has a natural abundance of 4.68%.

30Si has a relative atomic mass of 29.99288 and a natural abundance of 3.09%.

Explanation:

The atomic mass of silicon is given by:

Si=Si²⁸×A₁+Si²⁹×A₂+Si³⁰×A₃

Where:

Si: atomic mass of silicon (28.086)

Si²⁸: relative atomic mass of 28Si (27.97693)

A₁: natural abundance of 28Si (92.23%)

Si²⁹: relative atomic mass of 29Si (28.97649)

A₂: natural abundance of 29Si

Si³⁰: relative atomic mass of 30Si

A₃: natural abundance of 30Si

We also know that 30Si natural abundance is in the ratio of 0.6592 to that of 29Si.

We have to set up a system of three equations in three unknowns:

Si=Si²⁸×A₁+Si²⁹×A₂+Si³⁰×A₃

A₃=0.6592×A₂

A₁+A₂+A₃=1

First, we find substitute the value of A₃ in the third equation and solv teh value of A₂:

A₁+A₂+0.6592×A₂=1

A₁+1.6592×A₂=1

1.6592×A₂=1-A₁

A₂=\frac{1-A₁}{1.6592}=\frac{1-0.9223}{1.6592}=0.0468

Then, we find the value of A₃:

A₃=0.6592×A₂

A₃=0.6592×0.0468=0.0309

Finally, we find the value of Si³⁰ in the first equation:

Si=Si²⁸×A₁+Si²⁹×A₂+Si³⁰×A₃

28.086=27.97693×0.9223+28.97649×0.0468+Si³⁰×0.0309

28.086=27.15922+Si³⁰×0.0309

28.086-27.15922=Si³⁰×0.0309

\frac{0.92678}{0.0309}=Si³⁰

Si³⁰=29.99288

8 0
3 years ago
What is the mass number of oxygen atom with 7 neutrons?
kirill [66]
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7 0
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What is the atomic number of the atom in the diagram above please ?
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Answer:

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Explanation:

The atomic number is the number of protons in an atom. Protons are the positively charged particles in the nucleus. The number of protons define the identity of an element. An element with 5 protons is Boron, no matter how many neutrons may be present.

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