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:
A- Speed = distance/time
Explanation:
Would make sense and that's what I remember
Hey I don’t know the answers but try to use the app Socratic or photomath
Its molecular formula : C₆H₁₂O₆
<h3>Further explanation </h3>
The empirical formula(EF) is the smallest comparison of atoms of compound forming elements.
A molecular formula(MF) is a formula that shows the number of atomic elements that make up a compound.
(EF) n = MF
its empirical formula is CH₂O
CH₂O : 12+2+16=30
![\tt [30]n=180\rightarrow n=6\\\\(CH_2O]_6=C_6H_{12}O_6](https://tex.z-dn.net/?f=%5Ctt%20%5B30%5Dn%3D180%5Crightarrow%20n%3D6%5C%5C%5C%5C%28CH_2O%5D_6%3DC_6H_%7B12%7DO_6)
Answer:
a negative charge
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