A neutral lithium atom has 1 valence electron. A neutral bromine atom has 7 valence electrons. A chemical reaction between the 2
2 answers:
Answer: Option (B) is the correct answer.
Explanation:
Atomic number of lithium is 3 and its electronic distribution is 2, 1.
Atomic number of bromine is 35 and its electronic distribution is 2, 8, 18, 7.
It is known that a neutral atom which accepts electrons acquires a negative charge and a neutral atom that loses electrons will acquire a positive charge.
So, in order to attain stability lithium will lose its 1 valence electron and bromine will accept its 1 electron.
Therefore, lithium will acquire a positive charge and bromine will acquire a negative charge.
Thus, we can conclude that electrical charges would the 2 newly formed ions take on is and
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<u>Answer:</u> The mass of carbon dioxide produced is 26.9 kg
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
.....(1)
Given mass of propane = 9 kg = 9000 g (Conversion factor: 1 kg = 1000 g)
Molar mass of propane = 44.1 g/mol
Putting values in equation 1, we get:
The chemical equation for the combustion of propane follows:
By Stoichiometry of the reaction:
1 mole of propane produces 3 moles of carbon dioxide.
So, 204.08 moles of propane will produce = of carbon dioxide.
Now, calculating the mass of carbon dioxide by using equation 1, we get:
Molar mass of carbon dioxide = 44.01 g/mol
Moles of carbon dioxide = 612.24 moles
Putting values in equation 1, we get:
Hence, the mass of carbon dioxide produced is 26.9 kg
Correct part is C.
Explanation: This question can be easily explained with the help of reactivity series.
The metal which lies below in the reactivity series CANNOT displace the metal which lies above it. Similarly if the metal lies above in the reactivity series, it CAN displace the metal lying low in the series.
In A part, the reaction follows
Here Ca metal lies low in the series than Ba, therefore it cannot displace Ba metal in the reaction.
In B part ,the reaction follows
Here also Sr metal lies low in the series, therefore it cannot displace Ba.
In C part, the reaction follows
Here Na metal lies above in the series than Ba, therefore it can easily displace Ba in the reaction and will lead to form NaCl as a product.
In D part, the reaction follows
Here Mg lies low in the series, therefore it cannot displace Ba in the reaction.
You can use the image attached.
