Which reaction is balanced correctly? c + o2 → 2co2 ch4 + 4o2 → co2 + 2h2o c3h8 + 5o2 → 3co2 + 4h2o c6h12o6 + 3o2 → 6co2 + 6h2o

The reaction is balanced correctly

Explanation:

In a balanced reaction, number of all atoms should be same in both side of reaction.

For the reaction, -

Number of C atom in left hand side= Number of C atom in right hand side=3

Number of H atom in left hand side= Number of H atom in right hand side=8

Number of O atom in left hand side= Number of O atom in right hand side=10

So, is balanced reaction.

yes

explanation:

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number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.