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mash [69]
3 years ago
9

A number of valence electrons can be determined by looking at the... *

Chemistry
1 answer:
inessss [21]3 years ago
8 0

Answer:

The main group number for an element can be found from its column on the periodic table.

Explanation:

For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in group 6 and has 6 valence electrons.

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3 years ago
Which plant has a longer orbit. Jupiter or Saturn​
romanna [79]

Answer:

Saturn

Explanation:

One whole orbit is a year on earth. Well it takes Saturn 10,759 days to make one whole orbit. It takes Jupiter 4,333 days to make a whole orbit.

7 0
3 years ago
Mass in grams of 4.26 mol Si
Whitepunk [10]

Answer:

119.28g

Explanation:

Data obtained from the question include:

Number of mole of Si = 4.26 mol

Molar Mass of Si = 28g/mol

Mass of Si =?

Number of mole = Mass /Molar Mass

Mass = number of mole x molar Mass

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6 0
4 years ago
Read 2 more answers
Write the equilibrium constant expression Kc for the following reaction.2H20(g) ---------> O2(g) + 2H2(g) <---------Do not
Komok [63]

Answer:

K_c\text{ = }\frac{[O_2][H_2]\placeholder{⬚}^2}{[H_2O]\placeholder{⬚}^2}

Explanation:

Here, we want to write the equilibrium constant expression

To write this, we raise the concentrations of the reactants and products to the coefficient before them. These concentrations are represented by square brackets in which the chemical formula of the compound is placed

We place the representation of the products over that of the reactants

We have the expression written as follows:

K_c\text{ =  }\frac{[H_2]\placeholder{⬚}^2[O_2]}{[H_2O]\placeholder{⬚}^2}

7 0
1 year ago
Can all hydrocarbons react with oxygen and give carbon dioxide and oxygen
NemiM [27]

Answer:

Hydrocarbon fuels burn when they react with oxygen in the air. As all hydrocarbons only contain the elements carbon and hydrogen, the only products will be oxides of these elements. So as long as enough oxygen is present for complete combustion, the two products formed will be carbon dioxide (CO 2) and water (H 2O).

8 0
3 years ago
Read 2 more answers
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