1. Which of the following is an electrolyte? a. AgCl b. C&H120; c. Cu(OH)2 d. Mg
ID: 546944 • Letter: 1
Question
1. Which of the following is an electrolyte? a. AgCl b. C&H120; c. Cu(OH)2 d. MgBr2 2. Which of the following is a weak base? a. H2CO3 b. HCI c. Ca(OH)2 d. NH3 3. What is the mass of 0.535 mol of nitrogen dioxide? a. 16.1 g b. 24.6 g c. 30.0 g d. 46.0 g 4. What is the name of HNO (aq)? a. hydro nitric acid b. nitric acid c. nitrous acid d. nitronium acid 5. Which of the following is insoluble in water? a. (NH4)2COs b. AgBr c. CuSO d. KI True or False (0) (2 pts each) 6. Reduction is the gain of electrons. 7. The excess reactant is completely used up in a reaction. 8. A reaction occurs when gasoline boils because a gas is formed. 9. Bicarbonates react with acids to produce hydrogen gas. 10. All metals react with acid. 11. Electrolyte solutions will conduct electricity 12. If blue litmus paper turns red, a solution is basic. 13. HC2H302 is a strong electrolyte. 14. Acids produce hydroxide ions in water. 15. Spectator ions precipitate out of solution.Explanation / Answer
1) MgBr2 is an electrolyte. Because it is ionic compound. AgCl and Cu(OH)2 are precipitates and C6H12O6 isa covalent compound.
The answer is D.
2) H2CO3 is a weak acid. HCl is a strong acid. Ca(OH)2 and NH3 are bases
The answer is A.
3) molar mass of NO2 = 46 gram/mole
number of moles of NO2 = 0.535mole
number of moles = mass/molar mass
mass = number of moles x molar mass
Mass = 0.535x46= 24.61 grams = 24.6 grams
The answer is B
4) The name of HNO2 is nitrous acid
The answer is C.
5).AgBr is insoluble in water.
The answer is B
6) TRue
7)False. Only limiting reagent is completely involved in the reaction
8)False
9)False. it gives CO2
10)false
11)True
12)false . it is acid
13)false because it is a weak acid
14)false . acid produces H+ ion in water
15)false.
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