Answer: 72 grams of 
are needed to completely burn 19.7 g 
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number 
of particles.
To calculate the number of moles, we use the equation:
Putting in the values we get:
According to stoichiometry:
1 mole of 
requires 5 moles of oxygen
0.45 moles of require= 
moles of oxygen
Mass of 
72 grams of are needed to completely burn 19.7 g
Answer:
ıt is the projesi where the polen of one flower reaches the sığmaz of another flower.
Since phosphorus is in the 5th group it has the ability to gain or lose electrons
Vanadium
V 1s²2s²2p⁶3s²3p⁶4s²3d³
