Which pair of formulas represents the same compound? ch3ch2cho; ch3ch2cooh ch3coh(ch32; (ch3 3coh c2h5oh; ch3och3 (ch32co; ch3och3?

The correct answers are and

Explanation:

The formulas having same compound will have same number of individual atoms.

From the given options:

In compound 1:

Number of carbon atoms = 3

Number of hydrogen atoms = 6

Number of oxygen atoms = 1

In compound 2:

Number of carbon atoms = 3

Number of hydrogen atoms = 6

Number of oxygen atoms = 2

As, number of oxygen atoms in both the compounds are not same. Thus, these two do not represent same compounds.

In compound 1:

Number of carbon atoms = 4

Number of hydrogen atoms = 10

Number of oxygen atoms = 1

In compound 2:

Number of carbon atoms = 4

Number of hydrogen atoms = 10

Number of oxygen atoms = 1

Here, all the atoms of every element is same. Thus, these two compounds represent same compound.

In compound 1:

Number of carbon atoms = 2

Number of hydrogen atoms = 6

Number of oxygen atoms = 1

In compound 2:

Number of carbon atoms = 2

Number of hydrogen atoms = 6

Number of oxygen atoms = 1

Here, all the atoms of every element is same. Thus, these two compounds represent same compound.

In compound 1:

Number of carbon atoms = 3

Number of hydrogen atoms = 6

Number of oxygen atoms = 1

In compound 2:

Number of carbon atoms = 2

Number of hydrogen atoms = 6

Number of oxygen atoms = 1

As, number of carbon atoms in both the compounds are not same. Thus, these two do not represent same compounds.

Hence, the pairs which represent same compounds are and

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.

answer7,570,82356 cubic centimeters;