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svet-max [94.6K]
2 years ago
11

PLEASE HELP WILL MARK BRAINLEST!!!!

Chemistry
1 answer:
puteri [66]2 years ago
6 0

Answer: c????????

Explanation:

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Determine the molar masses for each of the following elements, compounds, or molecules. Remember to round to the proper amount o
ra1l [238]

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Explanation:

Cu(OH)2 _97.65 g/mol

Na2WO4 _293.82 g/mol

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KMnO4 _158.03 g/mol

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3 0
2 years ago
Read 2 more answers
The fact that same molecules of matter have been around for years is supported by​
Elza [17]

Answer:

The law of definite proportions

Explanation:

The law of definite proportions states that atoms combine in a molecule in a specific molar ratio or specific stoichiometry. For example, it's proved that regardless of the quantity we take, two hydrogen atoms always combine with one oxygen atom to form a water molecule.

Similarly, ionic substances follow the same pattern. Since the net charge of ionic salts should be equal to 0 and each element has a definite number of valence electrons in its shell all the time, the ions combine in a way, so that cations balance the charge of anions.

Essentially, the law of definite proportions is applicable and will be applicable in the future, since we know that each element has a fixed number of valence electrons in its ground state.

6 0
3 years ago
What is the difference in energy between an electron in 1s and an electron in 4s.
Andre45 [30]

Answer:

Explanation:

An electron in 4s is farther away from nucleus and it has higher energy when compared to electron from 1s.

5 0
3 years ago
In which of these cases would it be most useful to use a mole to calculate the number of particles?
Ivan
I believe it would be the last one because you can use the molar mass of HCl to find the number of moles, then use Avogadro’s number to find the number of atoms
Hope this helps!
6 0
3 years ago
1. Which statement describes the earliest model of<br><br> the atom?
zloy xaker [14]

Answer:

A). An atom is an indivisible hard-sphere.

Explanation:

The 'Atomic Theory' of Dalton is characterized as the earliest model(came in 1803) which described the atoms as the indivisible and resistant spheres. He <u>used the example of watermelon to elaborate that the atoms of a specific element share similar characteristics</u> and the atoms of distinct elements differ in their mass as well as their size. Thus, <u>option A</u> is the correct answer.

5 0
3 years ago
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