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yanalaym [24]
3 years ago
13

Which statement best describes electrons?(1) They are positive subatomic particles and are found in the nucleus.(2) They are pos

itive subatomic particles and are found surroundingthe nucleus.(3) They are negative subatomic particles and are found in thenucleus.(4) They are negative subatomic particles and are found surrounding the nucleus.
Chemistry
1 answer:
Anton [14]3 years ago
6 0
The answer should be (4) they are negative subatomic particles and are found surrounding the nucleus. The nucleus is formed by neutrons and protons. Neutrons are neutral and protons are positive.
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3 points
vfiekz [6]

Answer:

density=6.74g/ml

:320g÷47.5ml

d=6.74g/ml

thank you

<em><u>I </u></em><em><u>hope</u></em><em><u> </u></em><em><u>this </u></em><em><u>is </u></em><em><u>helpful</u></em>

8 0
3 years ago
The monomer of poly(vinyl chloride) has the formula C2H3Cl. If there are 1,565 repeat units in a single chain of the polymer, wh
monitta

Answer:

\large \boxed{9.780 \times 10^{4}\text{ u}}

Explanation:

The molecular mass of a monomer unit is:

C₂H₃Cl = 2×12.01 + 3×1.008 + 35.45 = 24.02 + 3.024 + 35.45 = 62.494 u

For 1565 units,

\text{Molecular mass} = \text{1565 units} \times \dfrac{\text{62.494 u}}{\text{1 unit }} = \mathbf{9.780 \times 10^{4}}\textbf{ u}\\\\\text{The molecular mass of the chain is $\large \boxed{\mathbf{9.780 \times 10^{4}}\textbf{ u}}$}

8 0
3 years ago
Yosemite Falls, in California, has a total height of 73,000cm. What is the height in meters?
Flauer [41]

Answer:

Height in meters = 73000 ÷ 100

(1m =100cm)

= 730m

Hope it helps.

5 0
3 years ago
Read 2 more answers
How many grams of KClO3 are needed to make 30.0 g of KCI?
lawyer [7]

Answer:

2KClO3 ==> 2 KCl + 3O2

393g O2 x 1 mole/32 g = 12.28 moles O2

moles KClO3 needed = 12.28 mol O2 x 2 mol KClO3/3mol O2 = 8.19 mol

grams KClO3 = 8.19 moles x 123g/mol = 1007g

Explanation:

6 0
2 years ago
According to the big bang theory, which statement is accurate about how the universe came to be?
Vlad1618 [11]

stars and galaxies were formed

4 0
2 years ago
Read 2 more answers
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