If the balanced equation reads:
2N2 + O2 ———> 2N2O
You should have 1.72 moles of N2.
Answer:
D.) the density changed
Explanation:
This would be the answer because it is a specific amount of Nitrogen undergoing a physical change. Since the color and boiling point don't influence a change in volume, those are ruled out. Also, nitrogen's molecular mass never changes, so that would not make sense either. But if the density, which is mass/volume, has changed (more specifically decreases) then it means the volume has increased.
Hope this helps.
When you drop iodine on a leaf you may observe a colour change of orange/brown to a blue/black complex.
This is because in the leaf there are starch molecules that form a blue/black complex with the starch molecules.
hope that helps :)
Answer: 6.0 g of silicon has more atoms
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 
of particles.
To calculate the moles, we use the equation:
a) 
1 mole of Si contains = atoms
0.21 moles of Si contains = 
atoms
b) 
1 mole of Fe contains = atoms
0.11 moles of Fe contains = 
atoms
Thus 6.0 g of silicon has more atoms
