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o-na [289]
2 years ago
14

How many valence electrons should be used to draw a Lewis structure of methane CH4

Chemistry
1 answer:
olganol [36]2 years ago
8 0

Answer:

8 valence electrons

Explanation:

There are 4 valence electrons in carbon because it is in group 4A of the periodic table. There is 1 valence electron per hydrogen based on its position on the periodic table, but CH4 has 4 hydrogens in it. So 1 times 4 is 4. Add the 4 valence electrons from carbon with the 4 electrons from H4 to get 8.

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What is the mass of 3.8 × 1024 atoms of argon (Ar)?
gulaghasi [49]
40 g Ar.......6.023*10^23 atoms
x g Ar.......3.8*10^24 atoms
x=40*3.8*10^24/(6.023*10^23)=252,365g Ar
6 0
3 years ago
Making solutions is an extremely important component to real-life chemistry. If you make 3.00 L of a solution using 90.0 g of so
kumpel [21]

Answer:

Final concentration of NaOH = 0.75 M

Explanation:

For NaOH :-

Given mass = 90.0 g

Molar mass of NaOH = 39.997 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{90.0\ g}{39.997\ g/mol}

Moles\ of\ NaOH= 2.2502\ mol

Molarity is defined as the number of moles present in one liter of the solution. It is basically the ratio of the moles of the solute to the liters of the solution.

The expression for the molarity, according to its definition is shown below as:

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

Where, Volume must be in Liter.

It is denoted by M.

Given, Volume = 3.00 L

So,

Molarity=\frac{2.2502\ mol}{3.00\ L}=0.75\ M

<u>Final concentration of NaOH = 0.75 M</u>

5 0
3 years ago
How many grams are in 3.8 moles of Li?
Sunny_sXe [5.5K]
In 3.8 moles of li, there are about <span>0.144071459 grams. I assume that you are talking about lithium.</span>
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Who helps recycle nutrients through an ecosystem? A. producers and decomposers B. producers and consumers C. consumers and decom
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D. Producers im sure of it hope im right

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Does the volume change if a ballon is put in a freezer
Lorico [155]
It gets smaller so yes
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3 years ago
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