Question

answer fast fast is ​

Answer 1

( i ) Mg( HCO₃ )₂

Molar mass of individual elements:-

• Mg = 23 g
• H = 1g
• C = 12 g
• O = 16 g

Now substitute them in the equation to get the molecular formula

⇒ 23 + 2[ 1 + 12 + 3(16) ]

⇒ 23 + 2[ 13 + 48 ]

⇒ 23 + 2[61]

⇒ 23 + 122

⇒ 145 gm

__________________________________

( ii ) K₂Cr₂O₇

Molar mass of individual elements:-

• K = 40g
• Cr = 52 g
• O = 16 g

Now substitute them in the equation to get the molecular formula

⇒ 2(40) + 2(53) + 7(16)

⇒ 80 + 104 + 112

⇒ 296 gm

___________________________________