Answer:
<h3>The answer is 11 g/cm³</h3>
Explanation:
The density of a substance can be found by using the formula
From the question
mass = 22 g
volume = 2 cm³
We have
We have the final answer as
<h3>11 g/cm³</h3>
Hope this helps you
Student #2: Protons determine the atomic number, and valence electrons show what period the element is in, hope this helps :)
Potassium (K) having 9 valance electrons can donate a single electron to Fluorine and reach the noble state by completing the Octet.
Option D
<u>Explanation:</u>
Octet Rule:
When the atoms of an element hold 8 independent valance electrons in their outermost orbit; the element converts into its noble state where it doesn't need to react or combine to any other element and gets stable. Each element tend to reach such state by either donating or receiving electrons to satisfy the Octet rule.
Here in this case, we can see that its Potassium which can donate a single electron to Fluorine as it has 19 electrons in each of its atoms. If we see its electronic configuration, we will know that the electrons are divided in three orbits having 2, 8 and 9 electrons, respectively.
Now, if a Potassium atom leaves one of its valence electrons out of 9; the count will be reduced to 8 which will make it stable according to the Octet Rule and hence, it forms a noble gas. Thus, it's Potassium which can donate an electron and gets stable.
2 moles of ZnO are produced if 1 mole of Zn and 2 moles of 
is required.
<h3>What are moles?</h3>
A mole is defined as 6.02214076 × 
of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
Balanced equation:
→ 
For 2 moles of Zinc, we need 1 mol of Oxygen to produce 2 moles of Zinc oxide
For 1 mole Zn, we need 2 mol to produce 2 moles ZnO only.
Hence, 2 moles ZnO is produced.
Learn more about moles here:
brainly.com/question/8455949
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Answer:
C
Explanation:
a variable does that dose not depend on that of another
