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Answer:
Q4. 2H₂ + O₂ ⟶ 2H₂O; 5; 2
Q5. 24; 30; H₂; 0; 5
Explanation:
Q4.
The equation for the reaction is
2H₂ + O₂ ⟶ 2H₂O
One O₂ molecule reacts with 2H₂ molecules.
We started with seven oxygen molecules. Five of them reacted, so
Two O₂ molecules did not react.
Q5.
Two water molecules form from two hydrogen molecules.
Two water molecules form from one oxygen molecule
Hydrogen forms fewer water molecules of water, so
Hydrogen is the limiting reactant.
The 24 hydrogen molecules will be completely used up.
The number of hydrogen molecules remaining at the end of the reaction is zero.
They have reacted with 12 O₂ molecules.
The number of O₂ molecules remaining is 17 - 12 = 5
Answer:
Density,
Explanation:
It is given that the density of liquid mercury is 13.6 g/mL. We need to convert the density into lb/in³.
We know that,
2.205 lbs= 1 kg
1 g = 0.0022 lb
1 mL = 0.0610 in³
So, the density of liquid mercury is .
Answer: The statement, carbon has the ability to bond with up to six other atoms is false.
Explanation:
Carbon is a group 14 element and it is a non-metal. The atomic number of carbon is 6 and its electronic distribution is 2, 4.
This means that there are 4 valence electrons present in it. Also, in order to attain stability a carbon atom forms only covalent bonds, that is, it shares its valence electrons with its own atoms or atoms of other elements.
Carbon has the capacity to form single and double bonds.
As valency of carbon is four so it can only combine to 4 other atoms vis single bond and it cannot bond with up to six other atoms.
Carbon shows the property of catenation, that is, it forms covalent bonds with its own atoms in a large number. So, carbon has the ability to bond together to form extensive branched or unbranched "carbon skeletons".
Thus, we can conclude that the statement, carbon has the ability to bond with up to six other atoms is false.