Question

Answer pls i will mark you brainlist​

Answer 1

Answer:

The molecular mass of  h_2CO_3h2CO3 is 64 unit.

b) The molecular mass of C_2h_5OHC2h5OH is 50 unit.

c) The molecular mass of h_2SO_4h2SO4 is 98 unit.

Step-by-step explanation:

To find : Calculate the molecular mass of the following ?

Solution :

a) h_2CO_3h2CO3

Atomic mass of hydrogen is 1 carbon is 14 and oxygen is 16.

h_2CO_3=1\times 2+14+16\times 3h2CO3=1×2+14+16×3

h_2CO_3=2+14+48h2CO3=2+14+48

h_2CO_3=64h2CO3=64

The molecular mass of  h_2CO_3h2CO3 is 64 unit.

b) C_2h_5OHC2h5OH

Atomic mass of hydrogen is 1 carbon is 14 and oxygen is 16.

C_2h_5OH=14\times 2+1\times 5+16+1C2h5OH=14×2+1×5+16+1

C_2h_5OH=28+5+16+1C2h5OH=28+5+16+1

C_2h_5OH=50C2h5OH=50

The molecular mass of C_2h_5OHC2h5OH is 50 unit.

c) h_2SO_4h2SO4

Atomic mass of hydrogen is 1 sulphur is 32 and oxygen is 16.

h_2SO_4=1\times 2+32+16\times 4h2SO4=1×2+32+16×4

h_2SO_4=2+32+64h2SO4=2+32+64

h_2SO_4=98h2SO4=98

The molecular mass of h_2SO_4h2SO4 is 98 unit.

Answer 2

(a) mass of H- 1, C-12, O-16

H2CO3

(1x2)+(12x1)+(16x3)

2+12+48

62

(b) mass of C-12, H-1, O-16

C2H5OH

(12x2)+(1x5)+(16x1)+(1x1)

24+5+16+1

46

(c) mass of Mg-24, S-32, O-16

(24x1)+(32x1)+(16x4)

24+32+64

120