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Leviafan [203]
3 years ago
12

In 450 BCE, Greek philosopher Democritus first thought of the existence

Chemistry
1 answer:
trasher [3.6K]3 years ago
3 0

Answer:

A. Invisible

Explanation:

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What best describes the goals of scientific investigation and technological development?
torisob [31]

Answer:

Scientific investigation aims to design and implement an experiment to learn new information, where

development aims to design a product to solve a problem.

Explanation:

8 0
3 years ago
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Xenon forms several compounds with oxygen and fluorine. It is the most reactive non-radioactive noble gas because a. its large r
muminat

Answer:

d. its effective nuclear charge is lower than the other noble gases.

Explanation:

Xenon belongs to group O on the periodic table. Most of the elements here are unreactive.

Due to the large size of Xenon, the outermost electrons have very low effective nuclear charge. Effective nuclear charge is the effect of the positive charges of the nucleus on the electrons in orbits. This effect decreases outward as atomic shell increases.

Xenon has a very large atomic radius and there is weak a nuclear charge on the outermost electrons. The more electronegative elements would be able to attract some of its outermost electrons easily and form chemical bonds with xenon much more readily.

7 0
3 years ago
What is the final concentration (M) of a solution prepared by diluting 50.0 mL of a solution to a volume of
docker41 [41]
0.600
D) 0.600 is the final concentration of the solution of KCl.
V1 = 50.0 mL.
6 0
2 years ago
Carbon-14 undergoes radioactive decay in the reaction above. Determine the type of radiation emitted in this reaction and descri
Drupady [299]

<u>Answer:</u> The beta-particle is being released in the reaction and the nucleus is changing from to nitrogen.

<u>Explanation:</u>

Carbon-14 undergoes a radioactive decay by the process of beta-minus decay.

In beta-minus decay, a neutron gets converted to a proton and an electron.

The equation for the beta-minus decay of carbon-14 follows the reaction:

_6^{14}\textrm{C}\rightarrow _7^{14}\textrm{N}+_{-1}^0\beta

In this reaction beta-particle is being released carrying -1 charge. Another name for this particle is known as electron.

In this decay process, the nucleus is changing from carbon to nitrogen. The property of the nucleus is changing completely as number of protons is getting increased.

4 0
3 years ago
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Can someone answer a and b to the file attached?
iris [78.8K]

Explanation:

The equation of the reaction is given as;

12C + 16 H2 --> 4 C3H8

a. Simplify the equation;

The coefficients are 12, 16 and 4.

4 is a common factor, so divide all through by 4.

12/4 = 3, 16/4 = 4, 4/4 = 1

The equation is given as;

3 C + 4 H2 -->  C3H8

b. If 21 moles of  C3H8 are formed, how many moles of C was needed.

From the reaction;

3 mol C atoms reacts to form 1 mol of  C3H8

x mol would react to form 21 moles of  C3H8

3 = 1

x = 21

x = 21  * 3

x = 63 moles

8 0
3 years ago
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