In this reaction what is the correct coefficient for sodium chloride? pb(no3)2 ? nacl → pbcl2 ? nano3
2 answers:
Answer:
2
Explanation:
The unbalanced reaction is shown below as:-
On the left hand side,
There is 1 lead atom and 2 nitrogen atoms and 6 oxygen atoms and 1 sodium atom and 1 chlorine atom
On the right hand side,
There is 1 lead atom and 2 chlorine atoms and 3 oxygen atoms and 1 sodium atom
Thus,
Right side, must be multiplied by 2 so to balance nitrogen and oxygen.
Left side, is multiplied by 2 so to balance the whole reaction.
Thus, the balanced reaction is:-
<u>Coefficient of the sodium chloride in the balanced equation - 2</u>
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Answer:
The pair of arrows which represents the relationship of speeds of the two cars is;
The second option as shown in the attached drawing
Explanation:
The given parameters are;
The reading on the speedometer of one car = 20 m/s
The reading on the speedometer of the other car = 72 km/h = 20 m/s
The blue arrow = 20 m/s
Therefore, given that the speeds of both cars are equal (20 m/s = 72 km/h = 20 m/s), the pair of arrows that represent the relationship of speeds of the two cars is two equal length blue arrows which is the second option
The attached diagram showing the pair of arrows that represents the relationship of speeds of the two cars is drawn using Microsoft Visio.
