Answer : The volume of 
is 14.784 L.
Solution : Given,
Mass of Aluminium = 6 g
Molar mass of Aluminium = 27 g/mole
First we have to calculate the moles of aluminium.
Moles of Al = 
The given balanced reaction is,
From the reaction, we conclude that
2 moles of Al react with the 6 moles of
0.22 moles of Al react with 
of
At STP, 1 mole contains 22.4 L volume
As, 1 mole of contains 22.4 L volume of
0.66 moles of contains 
volume of
Therefore, the volume of is 14.784 L.
One kilogram is the answer
Explanation:
No of molecules=0.500×6.023×10²³=3.011×10²³ molecules
When you add or change the subscript, you are changng the number of atoms in the substance.
C, because the nervous system takes in information through our senses, processes the information and triggers reactions, such as making your muscles move or causing you to feel pain. For example, if you touch a hot plate, you reflexively pull back your hand and your nerves simultaneously send pain signals to your brain.
