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Kruka [31]
3 years ago
7

An ionic bond would most likely form between atoms of which of these pairs? A. oxygen and oxygen B. magnesium and oxygen C. magn

esium and magnesium User: What is an ionic bond? A. the attraction positive ions have for free electrons B. the force that holds the valence electrons to the atom C. the attraction and bonding of ions with equal opposite charges D. the bonding of ions to the same element atoms of neutral charge
Chemistry
1 answer:
RoseWind [281]3 years ago
7 0
Qn1)B
qn2)C

This is because a nonmetal(oxygen) and a metal(magnesium) form ionic bond.
An ionic bond is strong electrostatic forces of attraction between positive and negative ions (opposite ions)

exp: Mg2+ + O2- ---> MgO
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14.7 grams of magnesium reacts completely with 9.7 grams of oxygen to form magnesium oxide (MgO). What is the percent compositio
swat32
The answer is 60.3% magnesium, 39.7% oxygen.
Solution:
The chemical equation for the reaction is 2 Mg + O2 → 2 MgO.
Since magnesium reacts completely with oxygen, it is the limiting reactant in the reaction. Hence, we can use the number of moles of magnesium to get the mass of MgO produced:
     moles of magnesium = 14.7g / 24.305g mol-1
                                       = 0.6048 mol

     mass of MgO = 0.6048mol Mg(2 mol MgO/2mol Mg)(40.3044g MgO/1 mol MgO) 
                           = 24.376g MgO

We can now solve for the percentage of magnesium:
     % Mg = (14.7g Mg / 24.376g MgO)*100% = 60.3%

We also use the number of moles of magnesium to get the mass of oxygen consumed in the reaction:
     mass of O2 =  0.6048 mol Mg (1mol O2 / 2mol Mg) (31.998g / 1mol O2) 
                        = 9.676g

The percentage of oxygen is therefore
     % O2 = (9.676g O2 / 24.376g MgO)*100%
               = 39.7%
Notice that we can just subtract the magnesium's percentage from 100% to get 
     % O2 = 100% - 60.3% = 39.7%
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3 years ago
5C + 6O2 = ? What will be the product of molecules formed from this equation?
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Answer:5 moles ofCarbonmonoxide and 3.5 moles of oxygen gas.This in combine to yield carbon dioxide.

Explanation:

5C + 6O2----------5CO + 7/2O2.

When carbon combine with oxygen, carbon monoxide is formed first and it later recombine with oxygen to yield carbon dioxide.

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