Complete the following: ich of these compounds is a strong electrolyte? (a) H20
ID: 704897 • Letter: C
Question
Complete the following: ich of these compounds is a strong electrolyte? (a) H20 (b) CH COOH (c)Ne d) NaC (e) CsHi20 2. Whi ich of these compounds is a weak electrolyte? aOH (d) HNO3 (e) HCI (b) CH3COOH (c) He 3. Which of these compounds is a nonelectrolyte? (b) C H OH ()HF ( Ba(OH2 (e) CH COOH 4. Which of the following compounds is insoluble? (a) NaCI (b) KI (c) MgCO d LiBr(e) KNO 5. Which of the following compounds is soluble? (a) Hg22 (b) CaCOs (c) BaS04 d) CuS (e) KPO 6. Which of the following is a homogeneous mixture? (a) Oil and water (b) Sand and iron filings (c) copper (d) glass 7. What is the mass of 0.368 moles of NO2? 8. What is the molar mass of ethane (CaHo)? 9. The formula for nitric acid is: (a) HSO (b) HNO (e) HCI d) HCO (e) No,Explanation / Answer
1) d. NaCl it is a salt
2) b. CH3COOH ( this is a weak acid dissociate partially) ( He is not an electrolyte)
3) b Ethanol( CH3CH2COOH)
4) c. MgCO3 ( the reason lies in the solubility constant.very poor value)
5) e. K3PO4
6) Glass ( uniform mixture rest are the heterogeneous type not stable)
7) 0.368 mole x mass of no2 = 0.368 mol x 46.0055 g/mol = 16.93 g
8) molar mass of ethane C2H6 =
Chemical formula of Ethane (C2H6):
Mass of Carbon = 12 grams
Mass of Hydrogen = 1 grams
Molar mass of Ethane =
= (mass of Carbon * number of Carbon atoms) + (mass of Hydrogen * number of Hydrogen atoms)
= (12*2) + (6*1)
= 24 + 6
= 30 grams
9) b ) HNO3