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Yuri [45]
2 years ago
5

How many moles are in 20 grams of O₂ gas?

Chemistry
1 answer:
Dima020 [189]2 years ago
4 0
20 g O2 x 1 mol O2/32 g O = 0.625 mol O2
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A diatom is a(n) _______ because it has _______.
4vir4ik [10]
A Diatom is under the phylum of Chrysophyta with the following characteristics:

1) Unicellular but often colonial
2) manufactures the carbohydrate chrysolaminarin
3) has unique double -shells of opaline silica
4) contains chlorophylls a and c

They are abundant in sea and fresh water where they serve as producers.

Diatoms are protists that have glass walls. Just like plants, they carry out cytokinesis. They are photosynthesizers with hard shells of silica. An example of a Diatom is Diatoma. 

Diatoms are divided into two major groups, one with radial symmetry and the other with bilateral symmetry. 

5 0
3 years ago
If the oxidation state of H is +1 and O is -2, what is the oxidation state of C in C2H4O?
Sedbober [7]

Answer:

-1

Explanation:

According to this question, the oxidation state/number of H and O in C2H4O is +1 and -2 respectively.

The oxidation state of carbon in the compound can be calculated thus:

Where;

x represents the oxidation number of C

C2H4O = 0 (net charge)

x(2) + 1(4) - 2 = 0

2x + 4 - 2 = 0

2x + 2 = 0

2x = -2

Divide both sides by 2

x = -1

The oxidation number of C in C2H4O is -1.

8 0
2 years ago
Please help I’ll mark Brainlyist !! (No links)
hjlf

Answer:

A is correct option you can go for it

7 0
2 years ago
Read 2 more answers
<br> Determine the frequency of a green laser with a wavelength of 532nm.
const2013 [10]

Answer:

5.64*10^{14}m

Explanation:

C = Fλ

C: Speed of light = 3*10^8m/s

f: Frequency (Hz)

λ: Wavelength (m)

Rearrange formula for wavelength:

C/F = λ

\frac{3*10^8}{532*10^{-9}} =5.64*10^{14}m

6 0
3 years ago
Air resistance depends upon _____.
Sedaia [141]

Answer:

ye its b

Explanation:

6 0
3 years ago
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