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4 years ago

A material found in air, water, or soil that is harmful to humans or other organisms

Chemistry

1 answer:

UNO [17]4 years ago

3 0

The answer is pollutant

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13. When a train car traveling at 4 m/s collides with a stationary train car, what happens to the momentum of the first train ca

Solnce55 [7]

Answer:

Momentum of first train car will reduce

Explanation:

When the moving care collides with the stationary car, it will increase the momentum of the stationary car. However, its own momentum will reduce.

It is so because the speed of the first train car will reduce after collision due to loss of energy in the collision while the stationary car may gain some momentum due to rise in velocity from zero (velocity at stationary position).

5 0

3 years ago

Any change that alters a substance without changing it into another substance.

Ber [7]

A physical change.

Physical change = can be reverted + doesn't change substance
Chemical = changes substance

7 0

3 years ago

Students in science are studying solutions and the dissolving rate of solids. One group was given some instant lemonade mix to

UkoKoshka [18]

Answer: A E D C

Explanation:

7 0

3 years ago

Construct a three-step synthesis of 1,2-epoxycyclopentane from cyclopentanol by dragging the appropriate formulas into the bins.

vladimir2022 [97]

Answer:

(1) Bromination, (2) E2 elimination and (3) epoxidation

Explanation:

In the first step, -OH group in cyclopentanol is replaced by more facile leaving group Br by treating cyclopentanol with $PBr_{3}$

In the second step, E2 elimination in presence of strong base e.g. NaOEt/EtOH produce cyclopentene

In the third step, treatment of cyclopentene with mCPBA produces 1,2-epoxycyclopentane

Full reaction scheme has been shown below

8 0

3 years ago

Empirical formula of c3h12o6

morpeh [17]

Answer:

$CH_{4} O_{2}$

Explanation:

The empirical formula is the simplest whole-number ratio of the elements in a compound to one another. To find the empirical formula given a molecular formula, divide all the subscripts by their greatest common factor.

3, 12, and 6 can all be divided by 3, which makes the empirical formula $CH_{4} O_{2}$

5 0

3 years ago