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Scilla [17]
3 years ago
13

The most common element in the atmosphere are

Chemistry
1 answer:
Ivanshal [37]3 years ago
8 0
Nitrogen and oxygen are the most prevalent in the atmosphere.
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What are the four categories commonly used to classify chemicals and chemical agents in the graphic communications industry
Oduvanchick [21]

Answer:

Organic

Plate making

Ink mists

Gas, fumes and dust

Explanation:

the four categories commonly used to classify chemicals and chemical agents in the graphic communications industry are Organic ,Plate making ,Ink mists, Gas, fumes and dust.

Organic refer to those chemicals gotten from living matter and are natural.

Plate making refers to how plates are make and it carry image in the printing process.

Ink mist gotten from ink is use in graphic designs for painting and color indication.

5 0
3 years ago
Write the formula of the conjugate base of the Brønsted-Lowry acic, HF​
alexdok [17]

Answer:

Furthermore, because hydrofluoric acid, HF, loses a proton, H+1, to generate its conjugate in the reaction that is shown above, this reactant can be classified as a Brønsted-Lowry acid, and, consequently, the fluoride ion, F–1, is the conjugate base of this acid.

Explanation:

hope this helps

5 0
3 years ago
Which scientist proposed the model of an atom as a nucleus surrounded by electrons?
bezimeni [28]

The answer is Ernest Rutherford.

3 0
2 years ago
Read 2 more answers
PLEASE HELP WITH THESE TWO QUESTIONS
adelina 88 [10]

1. Q=112.8 kJ

2. Q=5.01 kJ

<h3>Further explanation</h3>

The heat required for phase change :

  • melting/freezing :

Q = mLf

Lf=latent heat of fusion

  • vaporization/condensation

Q = mLv

Lv=latent heat of vaporization

1.

m=50 g=0.05 kg

Lv (water) = 2256 kJ/kg

\tt Q=0.05\times 2256=112.8~kJ

2.

m=15 g=0.015 kg

Lf for water = 334 kj/kg

\tt Q=0.015\times 334=5.01~kJ

3 0
2 years ago
while many microorganisms are harmful there are some that perform an important function. what is one example of suck a microorga
Tresset [83]

Answer:

Yeast

that helps in fermentation

8 0
3 years ago
Read 2 more answers
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