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One mole of any substance contains 6.022 x 1023 atoms/molecules. Number of molecules of H2S04 present in 100 mL of 0.02 M H2S04 solution is __________(a)12.044 x 1020 molecules (b) 6.022 x 1023 molecules (c) 1 x 1023 molecules (d) 12.044 x 1023 molecules" "

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To find the number of molecules of H2SO4H2SO4 present in 100 mL of a 0.02 M H2SO4H2SO4 solution, we need to first calculate the number of moles of H2SO4H2SO4 present in the solution using the given concentration. Given: Concentration of H2SO4H2SO4 solution = 0.02 M Volume of H2SO4H2SO4 solution =...
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To find the number of molecules of H2SO4H2SO4 present in 100 mL of a 0.02 M H2SO4H2SO4 solution, we need to first calculate the number of moles of H2SO4H2SO4 present in the solution using the given concentration.

Given:

  • Concentration of H2SO4H2SO4 solution = 0.02 M
  • Volume of H2SO4H2SO4 solution = 100 mL = 0.1 L

Using the formula for molarity, M=molesvolume (in L)M=volume (in L)moles, we can rearrange it to find the number of moles:

moles=M×volume (in L)moles=M×volume (in L)

moles=0.02 mol/L×0.1 Lmoles=0.02mol/L×0.1L

moles=0.002 molmoles=0.002mol

Now, to find the number of molecules, we'll use Avogadro's number, 6.022×10236.022×1023 molecules/mol:

Number of molecules=moles×Avogadro’s numberNumber of molecules=moles×Avogadro’s number

Number of molecules=0.002 mol×6.022×1023 molecules/molNumber of molecules=0.002mol×6.022×1023molecules/mol

Number of molecules=1.2044×1021 moleculesNumber of molecules=1.2044×1021molecules

So, the correct answer is:

(a) 1.2044×10211.2044×1021 molecules

 
 
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