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4 years ago

Describe an object that is transparent. What quality makes it transparent?

Chemistry

1 answer:

lapo4ka [179]4 years ago

4 0

Answer: Water

Explanation: Water is an example of transparent because light can pass through it. Air is also an example.

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Hydrocarbons that contoins least double bond are

Helen [10]

Answer:

Chemistry has taught that ;

Unsaturated hydrocarbon molecules that contain one or more double bonds are called alkenes.

Alkynes are unsaturated hydrocarbons due to the fact that some of the carbons are connected to fewer than four neighbouring atoms.

Note : Alkenes contain at least one double bond, while alkynes contain at least one triple bond.

Explanation:

3 0

3 years ago

I was born in ……… west. complete this sentense with article

Xelga [282]

Answer:

Article is

I was born in the  west .

4 0

3 years ago

a radioisotope has a half life of three hours how much of a 120g sample remains after 9 hours. what will the g amount be after 3

aksik [14]

$\huge\boxed{♔︎Answer♔︎}$

60g after 3 hours, 30g after 6 hours and 15g after 9 hours

Explanation:

Weight of the radioactive sample = 120g

half life time period = 3 hours

(a) The weight of sample after 3 hours

$\textsf{ No. of half lives} = \sf \cancel\frac{3}{3} = 1$

The fraction of sample left

$\sf { \frac{1}{2} }^{1} = \frac{1}{2}$

Mass of the sample left

$\sf \frac{1}{2} \times 120 = \cancel\frac{120}{2} = 60g$

60g of sample is left after 3 hours

(b) The weight of sample after 6 hours

$\textsf{ No. of half lives} = \sf \cancel\frac{6}{3} = 2$

The fraction of the sample left

$\sf { \frac{1}{2} }^{2} = \frac{1}{2} \times \frac{1}{2} = \frac{1}{4}$

Mass of the sample left

$\sf \frac{1}{4} \times 120 = \cancel\frac{120}{4} = 30g$

30g of sample is left after 6 hours

$\textsf {No. of half lives} = \sf \cancel\frac{9}{3} = 3$

The fraction of sample left

$\sf { \frac{1}{2} }^{3} = \frac{1}{2} \times \frac{1}{2} \times \frac{1}{2} = \frac{1}{8}$

Mass of sample left

$\sf \frac{1}{8} \times 120 = \cancel \frac{120}{8} = 15g$

15g of sample is left after 9 hours.

3 0

2 years ago

In a first–order reaction (A → B and rate = k [A]), tripling the concentration of A will have what effect on the reaction rate?

drek231 [11]

Your answer is b just got done doing mine .

3 0

3 years ago

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Who discovered electrons using Crookes tube?

andrey2020 [161]

Answer:

William Crookes????????????????

4 0

3 years ago

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