Question

calculate the amount of oxygen in 64 gram of oxygen molar mass of that is 16 gram mole -1​

Answer 1

Answer:

4 mole = 4×6.022 × 10²³ = 2.4088 × 10²⁴

Step-by-step explanation

16 gram of oxygen = 1 mole

64 gram of oxygen = 64/16 × 1 = 4 mole

1 mole = 6.022 × 10²³

so 4 mole = 4×6.022 × 10²³ = 2.4088 × 10²⁴

Answer 2

$\large \underline{ \underline{\rm \red{Question}}}{:}$

• calculate the amount of oxygen in 64 gram of oxygen molar mass of that is 16 gram mole -1.

$\large \underline{ \underline{\rm \red{Answer}}}{:}$

Given data:-

• ➠mass of Oxygen = 64 gram
• ➠molar mass of Oxygen = 16 gram/mole

To find:-

• ➠number of moles = ?

Solution:-

☆As we know that,

$\boxed{{ \large \rm \red{number \: of \: mole = \frac{known \: mass \: of \: the \: substance}{molar \: mas} }}}$

☆Substitute the values in the formula,

$\red \dashrightarrow{ \rm{number \: of \: moles = \frac{ \large{64}}{ \large{16}} }} \\ \\ \red \dashrightarrow{ \rm{number \: of \: moles = 4 \: moles}}$

☆As we know that,

${\boxed{ \rm\red{1 \: mole=6.02×10^{23}\:number \: of \: molecules \: atoms \:or \:ions}}}$

☆So,

$\dashrightarrow{\rm{4 \times 6.02×10^{23}}}$

$\dashrightarrow{\rm{2.408×10^{24}}}$

So the amount of Oxygen is 2.408×10²⁴