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Afina-wow [57]
3 years ago
9

What does the subscript 2 indicate in the formula O2? Oxygen transferred 2 electrons to form the bond. Each oxygen atom is shari

ng two electrons. There are two atoms in the molecule. There are two valence electrons in the molecule.
Chemistry
2 answers:
xxMikexx [17]3 years ago
5 0

Answer:

C) There are two atoms in the molecule.

Explanation:

In convention (accepted style) of writing out chemical equations and formular, it is understood that the subscript after an element tells us the number of atoms of said element.

For example, in the compound below, we can tell that;

H₂CO₃

There are 2 hydrogen atoms, 1 carbon atom and 3 Oxygen atoms.

We apply same principle to O2 and we now know the number 2 signifies the number of atoms present in the molecule.

Applying elimination on the other options, we have;

A) This option is not correct because electrons transferred or gained are represented by a charge which is the superscript after the element. E.g O²⁻

B) This option is wrong because sharing of electrons are not represented in the formular of a molecule or compound.

D) Valance electrons are usually represented by oxidation number. So this is wrong too.

Tom [10]3 years ago
3 0

Answer:There are two atoms in the molecule.

Explanation: All gases are diatomic i.e they are covalently bonded to another atom of the same element in order to attain stability. O atom is usually unstable because of it's incompletely filled outermost shell.

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How many moles of nitrogen are present at STP if the volume is 846L
Artyom0805 [142]
A mole of any gas occupied 22.4 L at STP. So, the number of moles of nitrogen gas at STP in 846 L would be 846/22.4 = 37.8 moles of nitrogen gas.

Alternatively, you can go the long route and use the ideal gas law to solve for the number of moles of nitrogen given STP conditions (273 K and 1.00 atm). From PV = nRT, we can get n = PV/RT. Plugging in our values, and using 0.08206 L•atm/K•mol as our gas constant, R, we get n = (1.00)(846)/(0.08206)(273) = 37.8 moles, which confirms our answer.
3 0
3 years ago
For the following reaction, find the value of Q and predict the direction of change, given that a 1L flask initially contains 2
Tresset [83]

Answer:

C) Q < K, reaction will make more products

Explanation:

  • 1/8 S8(s)  + 3 F2(g)  ↔  SF6(g)

∴ Kc = 0.425 = [ SF6 ] / [ F2 ]³

∴ Q = [ SF6 ] / [ F2 ]³

∴ [ SF6 ] = 2 mol/L

∴ [ F2 ] = 2 mol/L

⇒ Q = ( 2 ) / ( 2³)

⇒ Q = 0.25

⇒ Q < K, reaction will make more products

 

5 0
3 years ago
Describe how the properties of elements in the same group differ to the properties of elements in the same period
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Answer:

(a) (i) All the elements of a group have similar chemical properties because they have same no. of valence electrons in their outermost shell. (ii) All the elements of a period have different chemical properties because they have different no. of valence electrons in their atoms.

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3 years ago
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Answer:

Inferring is when a scientist uses reasoning to explain or interpret the things they observe

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Answer:

A

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