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kirill115 [55]
3 years ago
10

1. Which term best describes ultraviolet radiation?

Chemistry
1 answer:
natali 33 [55]3 years ago
7 0
The answer is invisible I think, don't hate if I'm wrong
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Science begins with an observation, true or false?
JulijaS [17]

Answer:

true!

Explanation:

if youre going by the scientific method, observations are mainly first. then questions, research, etc

7 0
3 years ago
Which of the following is a physical property of water?
Snezhnost [94]
BOTH OF THE ABOVE ANSWERS ARE CORRECT
7 0
3 years ago
7. Which of the following is a chemical property?
Goryan [66]

Answer:

It ability to react with oxygen.

Explanation:

Freezing point and hardness can be altered. Physical properties can also be reversed. Chemical properties on the other hand cannot. The product after reaction with an element never changes.

8 0
4 years ago
The element chlorine has an atomic weight of 35.5 and consists of two stable isotopes chlorine-35 and chlorine-37. The isotope c
mylen [45]

Answer:

The answer is 37amu

Explanation:

We are given:

Chlorine-35: atomic mass  =35 amu  and percent abundance  =75.5% ≡ 0.755

Chlorine-37: atomic mass  = x amu  and percent abundance  =24.5% ≡ 0.25

From table, relative atomic mass of Chlorine is 35.5

⇒(0.755 × 35) + (24.5 × x) = 35.5

26.402 + 24.5x = 35.5

∴ x = 9.075 ÷ 24.5 = 0.37 ≡ 37.

∴ mass of Chlorine 37 = 37amu

6 0
3 years ago
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Pleaseeee help me solve this answer
Zarrin [17]

Answer:

A open system

I think plz tell me if i'm wrong

Explanation:

3 0
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