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DiKsa [7]
4 years ago
14

What is a pure substance? What is it made up of?

Chemistry
1 answer:
goblinko [34]4 years ago
6 0
Pure substances are substances that are made up of only one kind of particles and has a fixed or constant structure. They are classified as elements
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The electron configuration can be also be represented by writing the symbol for the occupied subshell and adding a superscript t
hichkok12 [17]

Answer: The electron configuration of carbon atom is written as 1s²,2s², 2p².

Explanation:

The electronic configuration of an atom is defined as the arrangement of electrons into the shells or orbit of an atom. The constituents of an atom are proton, neutron and electron. the nucleus of an atom, where most of its mass are concentrated, consists of neutrons and protons fused together. Electrons occupy the shells surrounding the nucleus. The shells are lettered K, L, M, N and so on. Numerically, K shell is numbered 1, L is 2 and so on. These numbers also correspond with the increase in the energy level. All the electrons in K shell for instance belong to the first energy level and they have equal energy.

There is a limit to the number of electrons that can be found in a shell. This can be obtained by a formula 2n² where "n" is the energy level number of the shell.

K: 2n² = 2 × 1² = 2

L: 2n² = 2× 2² = 8

These shells are further subdivided into subshells. There are 4 subshells, s, p, d, and f. Each subshell can hold a different number of electrons.

This electron configuration of carbon can be written as 1s² 2s² 2p² where 1s, 2s, and 2p are the occupied subshells, and the superscript "2" is the number of electrons in each of these subshells.

4 0
3 years ago
In France, grapes are 1.75 Euros per kilogram. What is the cost of grapes in dollars per pound if the exchange rate is 1.36 doll
Jet001 [13]

You want to convert Euros / kg to Dollars / pound

 

So you'll have to multiply the price (Euros / kg) by the exchange rate (Dollars / Euro) to get a number that has units of Dollars / kg.

 

Euros     Dollars       Dollars

-------  x ---------   =  --------

 kg         Euro             kg

 

Then you have to multiply the number of kg in a pound (which has units of kg / pound) to get a number in units of Dollars / pound.  This number is 2.2.

 

Dollars       kg              Dollars

--------  x --------   =      --------

  kg        pound           pound

 

So the answer would be 1.75 * 1.36 / 2.2 = 1.08 dollars / pound.

3 0
3 years ago
Explain how to get the mole of any compound
Evgesh-ka [11]

Answer:

Explanation

To get a mole of a compound just add up the molar mass

For example:  O2

1 mole of oxygen is 16g

1 mole of O2= 32g

You can find the molar mass of each individual element on the periodic table of elements

3 0
3 years ago
Suppose you are investigating how the amount of exercise a hamster gets affects how long the hamster lives. In order to control
ozzi
Hello, to answer your question fully.

<span>D. Make all the hamsters run on a hamster wheel for the same amount of time.

 Because your doing the experiment on exercise not anything else 
 so keeping charts in a notebook and set a time on how long they were on it and how long you want them to be on it. 
   
                Signed by, Virtuoso Sargedog</span>

4 0
3 years ago
Read 2 more answers
What is true of an Arrhenius acid?
expeople1 [14]
<span>B, An Arrhenius acid donates H+ ions.</span>
5 0
3 years ago
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