QUESTION 1 Lindane is a toxic insecticide that causes dizziness and diarrhea in

Question

QUESTION 1 Lindane is a toxic insecticide that causes dizziness and diarrhea in humans. Find the empirical formula for lindane given its percent composition: 24.78% C, 2.08% H, and 73.14% Cl. Path: pWords:0 15 points Save Answer QUESTION 2 If 40.0 g of acetylene is allowed to react with 40.0 g of oxygen , how many grams of CO2 are formed? Path: pWords:0 15 points Save Answer QUESTION 3 If a 17.5 mL sample of an acetic acid (CH3CO2H) solution required 29.6 mL of 0.250 M NaOH for neutralization, what is the molarity of the acetic acid? CH3CO2H(aq) + NaOH(aq) NaCH3CO2 + H2O

Explanation / Answer

Answer 1:

The exact question is Lindane is a toxic insecticide that causes dizziness and diarrhea in humans. Find the molecular formula for lindane given its percent composition: 24.78% C, 2.08% H, and 73.14% Cl.

The approximate molar mass is 290 g/mol

Empirical Formula = C12HCl35

Answer 2.

moles C2H2 = 40.0 g / 26.038 g/mol=1.54

moles O2 required = 1.54 x 5 /2 =3.85

actual moles O2 = 40.0 g/ 32 g/mol=1.25 so O2 is the limiting reactant

the ratio between O2 and CO2 is 5 : 4

moles CO2 = 1.25 x 4 /5=1.0

mass CO2 = 1 mol x 44.0 g/mol= 44.0 g

Answer 3.

CH3COH + NaOH ---> CH3COONa + H2O
Na = Nb = 1
Va = 17.5ml; Vb = 29.6ml; Ca =?; Cb = 0.250M
CaVa = CbVb
Ca = CbVb/Va = 0.250 x 29.6/17.5 = 7.4/17.5 = 0.423M
Ca = 0.423M

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