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Calan B
What is the boiling point of a 3.74 m solution of potassium perchlorate (KClO4)?
Assume that the solvent is water, which has a Kb of 0.51ºC/m and a boiling point of 100.0ºC.
A. 101.2ºC
B. 3.8ºC
C. 103.8ºC
D. 107.6ºC
E. 111.4ºC
1 AnswerChemistry1 decade agoWhich of the following statements about boiling points are true?
A. The boiling point of a solution made by dissolving 10 g of C2H6O2 in 0.30 kg of water is higher than the boiling point of a solution of 10 g of NaCl in 0.30 kg of water.
B. The boiling point of 0.1 m NaF(aq) is lower than the boiling point of 0.1 m methanol(aq).
C. The boiling point of 2 m KF in water is 102.4ºC.
D. The boiling point of 1 m aqueous KNO3 is higher than the boiling point of 1 m aqueous Ba(NO3)2.
E. The boiling point of a 0.5 m aqueous solution of LiOH is the same as the boiling point of a 0.5 m aqueous solution of LiCl.
There may be more than one answer^
1 AnswerChemistry1 decade agoWhat is the boiling point of a solution of 235.0 g of C2H6O2 in 450 g C2H5OH?
Kb for C2H5OH is 1.19ºC/m and the boiling point of C2H5OH is 78ºC.
1 AnswerChemistry1 decade agoRank these aqueous solutions in order of increasing freezing point(lowest to highest)?)?
1 m KCl
1.5 m CaCl2
3 m glycerol
2 m NH4NO3
0.5 m Na2CO3
1 AnswerChemistry1 decade agoWhich of the following statements is (are) true?
A. The vapor pressure of 0.10 m NaCl is higher than the vapor pressure of 0.05 m MgCl2, assuming the solvent in each case is water.
B. Sea water has a lower vapor pressure than distilled water.
C. The vapor pressure of 1 m NaCl is higher than the vapor pressure of 0.5 m KNO3, assuming that the solvent in each case is water.
D. The vapor pressure of 1 m sucrose (C12H22O11) is higher than the vapor pressure of 1 m NaCl where the solvent is water.
E. The vapor pressure of CO2 is lower than the vapor pressure of water.
More than one answer may be true^
2 AnswersChemistry1 decade agoWhat is the boiling point of a 2.86 m solution of ammonium nitrate (NH4NO3)?
Assume that the solvent is water, which has a Kb of 0.51ºC/m and a boiling point of 100.0ºC.
A. 101.2ºC
B. 102.9ºC
C. 2.9ºC
D. 113.1ºC
E. 105.8ºC
1 AnswerChemistry1 decade agoLiquids are like gases in that they:?
A. take the shape of their container.
B. are colorless, odorless, and tasteless.
C. expand greatly when they are heated.
D. always mix with other liquids.
E. completely fill a container.
4 AnswersChemistry1 decade agoWhich of the following is not an example of a gas at room temperature?
A. Water vapor
B. Sulfur dioxide
C. Argon
D. Fluorine
E. Carbon
1 AnswerChemistry1 decade agoThe air in a laboratory was measured with a barometer to be 7.40 x 102 mm Hg.?
What is the laboratory air pressure in atm?
1 AnswerChemistry1 decade agoIf calcium metal is exposed to chlorine gas a reaction occurs. What will be the product(s) of this reaction?
A. Ca2 + Cl
B. CaCl2
C. Ca2Cl
D. CaCl
E. Ca + Cl2
4 AnswersChemistry1 decade agoWhich of these statements is TRUE about bases?
A. Bases have a slippery feel on the skin.
B. Bases produce H+ ions in solution.
C. Bases are proton acceptors in reactions.
D. Bases tend to taste sour.
E. Bases react with metals to form hydrogen gas.
Their may be more than 1 answer^
3 AnswersChemistry1 decade agoWhy are Arrhenius acids strong electrolytes?
A. Because they are proton donors and react with bases.
B. Because they dissociate completely in water to produce H+ ions in solution.
C. Because they will not conduct electricity in solution.
D. Because they are the product of a neutralization reaction with an acid and base.
E. Because they react with water to form different products.
4 AnswersChemistry1 decade agowhich of the following statements about ion formation is correct?
A. A Group 6A element gains two electrons.
B. A Group 7A element loses one electron.
C. A Group 2A element loses two electrons.
D. A Group 1A element gains one electron.
E. A Group 3A element loses three electrons.
More than 1 answer may be chosen
4 AnswersChemistry1 decade agoWhen a ____________is heated, it loses water and becomes anhydrous.?
What goes in the blank?
3 AnswersChemistry1 decade agoWhat is the empirical formula for calcium nitrate?
A. Ca(NO3)2
B. Ca3(NO3)2
C. Ca(NO2)2
D. CaNO6
E. Ca2(NO3)
5 AnswersChemistry1 decade agoWhich of these is an example of an oxyanion?
A. Oxide
B. Cyanide
C. Ammonium
D. Peroxide
E. Sulfate
3 AnswersChemistry1 decade agoWhat would be the empirical formula for glucose (C6H12O6)?
CHOOSE ONE OF THE FOLLOWING ANSWERS
A. C3H6O3
B. CH2O
C. CHO
D. C6H12O6
E. C3H2O3
3 AnswersChemistry1 decade agoWhat is the name of the compound N3S?
CHOOSE 1 OF THE FOLLOWING ANSWERS:
A. Trinitrogen monosulfide
B. Nitrogen trisulfide
C. Nitrogen sulfide
D. Nitrogen (III) sulfide
E. Nitrogen sulfur
2 AnswersChemistry1 decade agoWhat is the correct name of the compound CuSO4 • 5H2O ?
Choose one of the following answers
A. Copper (II) sulfate decahydrate
B. Copper (II) sulfate
C. Copper (II) sulfate pentahydrate
D. Copper (II) sulfite pentahydrate
E. Copper (II) sulfur tetraoxide pentahydrate
4 AnswersChemistry1 decade agoWhat ions will the following elements form?
Put the letters in the correct blanks
A. Lithium
B. Gallium
C. Magnesium
D. Oxygen
E. Phosphorous
3+ = __
1+ = __
3- = __
2- = __
2+ = __
2 AnswersChemistry1 decade ago