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Answer :
Molar mass:
HF = 1 + 19 = 20.0 g/mol
Number of moles :
124 / 20.0 => 6.2 moles
Volume = 2.4 L
M = n / V
M = 6.2 / 2.4
M = 2.6 M
Answer A
hope this helps!
HF = 1 + 19 = 20.0 g/mol
Number of moles :
124 / 20.0 => 6.2 moles
Volume = 2.4 L
M = n / V
M = 6.2 / 2.4
M = 2.6 M
Answer A
hope this helps!
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The Answer is A as you said:
Molarity = [tex] \frac{no. of moles}{volume} [/tex]
moles of HF = [tex] \frac{mass}{molar mass} [/tex]
= [tex] \frac{124}{(1 + 19)} [/tex]
= 6.2 mol
∴ molarity of HF = [tex] \frac{6.2 mol}{2.4 dm^{3} } [/tex]
= 2.58 M
≈ 2.6 M
Molarity = [tex] \frac{no. of moles}{volume} [/tex]
moles of HF = [tex] \frac{mass}{molar mass} [/tex]
= [tex] \frac{124}{(1 + 19)} [/tex]
= 6.2 mol
∴ molarity of HF = [tex] \frac{6.2 mol}{2.4 dm^{3} } [/tex]
= 2.58 M
≈ 2.6 M
