Question

find the gram molecular weight of Hcl, NaoH, Na2co3, and H2so4​

Answer 1

Question:

Find the molecular weight of

a) HCl

b) NaOH

c) Na₂CO₃

d) H₂SO₄

Subject:

Chemistry

Topic:

Finding the molecular weight of the given compound

Solution:

To find the molecular weight of

a) HCl

$\boxed{ \begin{minipage}{10cm} Atomic Weights:\\\\\\Atomic Weight of Hydrogen= 1\\\\Atomic Weight of Chlorine= 16 \\\\\\Number of Atoms present:\\\\\\Number of Hydrogen atoms present = 1\\\\Number of Chlorine atoms present = 1\\\\\\Molecular Weight of HCl =\\\\\\H = 1\times1=1\\\\Cl=1\times35.5=35.5\\\\\\ Molecular Weight of HCl = 1+35.5= \: 36.5amu \end{minipage} }$

b) NaOH

$\boxed{ \begin{minipage}{10cm} Atomic Weights:\\\\\\Atomic Weight of Sodium= 23\\\\Atomic Weight of Oxygen= 16 \\\\Atomic Weight of Hydrogen= 1\\\\\\Number of Atoms present:\\\\\\Number of Sodium atoms present = 1\\\\Number of Oxygen atoms present = 1\\\\Number of Hydrogen atoms present = 1\\\\Molecular Weight of NaOH=\\\\\\Na = 1\times23=23\\\\O=1\times16=16\\\\ H= 1\times 1=1\\\\\\ Molecular Weight of NaOH= 23+16+1= \: 40amu \end{minipage} }$

c) Na₂CO₃

$\boxed{ \begin{minipage}{10cm} Atomic Weights:\\\\\\Atomic Weight of Sodium = 23\\\\Atomic Weight of Carbon = 12\\\\Atomic Weight of Oxygen = 16\\\\\\Number of Atoms present :\\\\\\Number of Sodium Atoms present in Na_2CO_3= 2\\\\ Number of Carbon Atoms present in Na_2CO_3=1\\\\ Number of Oxygen Atoms present in Na_2CO_3=3\\\\\\ Molecular Weight of Na_2CO_3=\\\\\\ Na = 2\times 23=23\\\\ C=1\times12=12\\\\ O=3\times16=48\\\\\\ Molecular Weight of Na_2CO_3= 46+12+48=106.amu.\end{minipage} }$

d) H₂SO₄

$\boxed{ \begin{minipage}{10cm} Atomic Weights:\\\\\\Atomic Weight of Hydrogen = 1\\\\Atomic Weight of Sulphur= 23\\\\Atomic Weight of Oxygen = 16\\\\\\Number of Atoms present :\\\\\\Number of Hydrogen Atoms present in H_2SO_4= 2\\\\ Number of Sulphur Atoms present in H_2SO_4=1\\\\ Number of Oxygen Atoms present in H_2SO_4=4\\\\\\ Molecular Weight of H_2SO_4=\\\\\\ H = 2\times 2=2\\\\ S=1\times32=32\\\\ O=4\times16=64\\\\\\ Molecular Weight of H_2SO_4= 2+32+64=98.amu.\end{minipage} }$

Answer:

The Molecular Weight of  HCl is  36.5 amu

The Molecular Weight of  NaOH is 40 amu

The Molecular Weight of  Na₂CO₃ is 106 amu

The Molecular Weight of  H₂SO₄ is 98a mu

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