The answer is C :
It controls the entry and exit of substances.
A metallic bond is a bond between two metals or cations. In metallic bonding, the electrons are shared between the positive ions. The electrons move around between atoms. This is what allows objects with metallic bonds to be malleable and able to conduct electricity.
Answer:
Metals are good conductors of electricity. silver is found in in pure form from the earth. so In the given options all are metals. Among them silver is the best conductor of electricity after second best conductor of electricity is gold.
Explanation:
Answer:
amount of water produced = 31.76 g of water
Explanation:
20 g of ammonia has 
moles of ammonia
and 50 g of Oxygen has 
moles of oxygen .
to find the limiting agent we have to find the mole ratio
mole ratio of ammonia = 
mole ratio of oxygen = 
therefore the limiting reagent is ammonia.
4 moles ammonia gives 6 moles of water
therefore 1 mole of ammonia gives 
moles of water
therefore moles of ammonia gives 
moles of water.
amount of water produced = 1.76 moles of water = 31.76 g of water
