Description : What is the molality of a salt solution prepared by dissolving two moles of salt in 500 grams of water?
Last Answer : ANSWER: 4
Description : What is the molarity of a solution made by dissolving 6 moles of naoh in 3 kg?
Last Answer : Need answer
Description : Moles of solute divided by kilograms of solvent is expression for: w) molarity x) solute-to-solution ratio y) mole percentage z) molality
Last Answer : ANSWER: Z -- MOLALITY
Description : 2.5 liters of a sodium chloride (NaCl) solution contain 5 moles of the solute. What is the molarity? w) 5 molar x) 2 molar y) 2.5 molar z) 12.5 molar
Last Answer : ANSWER: X -- 2 MOLAR
Description : Which of the following concentration expressions is defined as the number of moles of solute per kilogram of solvent: w) molarity x) molality y) normality z) equivalents
Last Answer : ANSWER: X -- MOLALITY
Description : At zero degrees Celsius and one atmosphere (STP), the volume of a gas is 1,000 milliliters. If the temperature is increased to 25 degrees Celsius and the pressure is doubled, what is the new volume of the gas? w) 546 milliliters x) 500 milliliters y) 1,000 milliliters z) 273 milliliters
Last Answer : ANSWER: W -- 546 MILLILITERS
Description : A negative heat of solution indicates that: w) an endothermic dissolving process occurs x) solute solubility increases with rising solution temperature y) solute solubility decreases with rising solution temperature z) super-saturation conditions exist
Last Answer : ANSWER: Y -- SOLUTE SOLUBILITY DECREASES WITH RISING SOLUTION TEMPERATURE
Description : What is the molality of a solution made by dissolving 6 moles of Noah in 3 kg of water?
Last Answer : Feel Free to Answer
Description : Normality is defined as the number of: w) moles of solute per 1000 grams of solvent x) equivalent weights of solute per liter of solution y) kilograms of solute per liter of solution z) moles of solute per 1000 grams of solution
Last Answer : ANSWER: X -- EQUIVALENT WEIGHTS OF SOLUTE PER LITER OF SOLUTION
Description : At one atmosphere, a cylinder with movable piston contains 2,000 milliliters of gas. If the pressure is increased to 5 atmospheres and the temperature remains unchanged, what is the new volume of the gas? w) 10,000 milliliters x) 400 milliliters y) 1,000 milliliters z) 4,000 milliliters
Last Answer : ANSWER: X -- 400 MILLILITERS
Description : The formation of pockets of gas in a liquid is called: w) absorption x) cavitation y) adsorption z) dissolving
Last Answer : ANSWER: X -- CAVITATION
Description : An aqueous solution of sodium chloride is prepared by dissolving 10kg of sodium chloride in 50 kg of water find (i) Weight % (ii) Mole % of solution. [Atomic weight of Na = 23, Cl = 35.5]
Last Answer : Weight of NaCl = 10 kg Weight of H2O = 50 kg Total weight = 60 kg Weight % of NaCl = (10/ 60) * 100 =16.67% Weight % of H2O = (50/ 60) * 100 = 83.33% Molecular weight of NaCl = 58.5 k moles of NaCl ... 100 = 5.79% Mol % of H2O = (moles of H2O / Total moles)*100 = (2.78/ 2.949)*100 = 94.26%
Description : One equivalent of a triprotic acid is the same as: w) one mole of the acid x) one-third mole of the acid y) three moles of the acid z) three equivalents of a diprotic acid
Last Answer : ANSWER: X -- ONE-THIRD MOLE OF THE ACID
Description : An aqueous solution is always a solution in which the: w) solute is water x) solute is a salt y) solvent is a salt z) solvent is water
Last Answer : ANSWER: Z -- SOLVENT IS WATER
Description : What is the molar mass of haemocyanin and the freezing point of the solution when an aqueous solution is prepared by dissolving 1.5 grams of haemocyanin a protein obtained from crabs in 0.25 litres of?
Last Answer : Haemocyanins are a group of proteins.
Description : 20 gram of caustic soda are dissolved in water to prepare 500 ml of solution. Find the normality and molarity of solution.
Last Answer : Basis: 500 ml solution. Weight of solute = 20 gm Molecular weight of NaOH = 40 Gram moles of solute = 20/40 = 0.5 Molarity = Gram moles/ Volume of solution in lit 0.5/0.5 = 1 M Normality = gram equivalent of solute/ volume of solution in lit = 0.5/0.5 = 1N
Description : After dissolving 0.25 kg of salt in 1 kg of water, its volume becomes 1200 cc. What is the concentration of solution ?
Last Answer : We know , 1 cc = 1cm ^ 3 = (10 ^ -6) m ^ 3 Density of salt water = (1 + 0.25) / (1200 × 10 ^ - ৬) = 1.04 kg / (m 3)
Description : The solution made by dissolving Salt (NaOH) in water is called as
Last Answer : Ans. Brine solution
Description : What is the molarity of 10.0 g of KCl in 0.500 L of solution?
Last Answer : The molarity is 0,268.
Description : How many moles of carbon are in 48 grams of carbon w) 4 x) 3 y) 2 z) 1
Last Answer : ANSWER: W -- 4
Description : The percentage degree of hydrolysis of a salt of weak acid (HA) and weak base (BOH) in its 0.1 M solution is found to be `10%.` If the molarity of the
Last Answer : The percentage degree of hydrolysis of a salt of weak acid (HA) and weak base (BOH) in its 0.1 M solution is ... A. `5%` B. `10%` C. `20%` D. none
Description : The number of moles of solute present in 1 kg of a solvent is called its (a) Molality (b) Molarity (c) Normality (d) Formality
Last Answer : Ans:(a)
Description : Molarity is defined as the number of gm moles of solute per __________ of solvent. (A) Litre (B) kg (C) gm (D) c.c
Last Answer : (A) Litre
Description : Foods cooked in salt water compared to unsalted water will: w) cook faster x) boil at a lower temperature y) not be affected in any way z) will cook slower because of the action of the salt
Last Answer : ANSWER: W -- COOK FASTER
Description : Which of the following chemical reactions does not lead to formation of a salt? w) Reaction of salts with acids. x) The reaction of base anhydrides with acid anhydrides. y) Action of water on oxides of nonmetals. z) Reaction of acid with base.
Last Answer : ANSWER: Y -- ACTION OF WATER ON OXIDES OF NONMETALS. (If water reacts with oxides of nonmetals, an acid is formed.)
Description : Acids react with bases to form which of the following? Do they form: w) salt and acidic anhydride x) water and basic anhydride y) basic anhydride and salt z) salt and water
Last Answer : ANSWER: D -- SALT AND WATER
Description : A cobalt chloride solution soaked into a piece of cotton can be used as an indicator for changes in humidity levels. Pink indicates a high-humidity environment and blue a low-humidity environment. What ... the cobalt's waters of hydration. z) This is an illustration of the Schrodinger principle.
Last Answer : ANSWER: Y -- THE LOSS AND READSORPTION OF THE COBALT'S WATERS OF HYDRATION.
Description : A sample of grapefruit juice at 25 degrees Celsius has a hydronium concentration of 1.78 X 10-3 molar. What is the pH of the solution? w) 2.22 x) 2.75 y) 3.25 z) 6.33
Last Answer : ANSWER: X -- 2.75
Description : Which of the following substances is a molecular solid? w) Glass x) Ice y) Silver z) Table Salt
Last Answer : ANSWER: X -- ICE
Description : What is the purpose of the salt bridge in an electrochemical cell? w) It allows ion migration. x) It allows electron flow. y) It prevents ion migration. z) It prevents electron flow.
Last Answer : ANSWER: W -- IT ALLOWS ION MIGRATION
Description : Which of the following metals can be obtained from its ore only by electrolysis of a molten salt ? w) cobalt x) chromium y) copper z) sodium
Last Answer : ANSWER: Z -- SODIUM
Description : What is a typical spacing between atoms in a crystal, e.g., copper or rock salt? w) 0.1 Angstroms x) 2 Angstroms y) 20 Angstroms z) 100 Angstroms
Last Answer : ANSWER: B -- 2 ANGSTROMS
Description : Which of the following substances is an ionic netw solid? w) Diamond x) Table Salt y) Brass z) Dry ice
Last Answer : ANSWER: X -- TABLE SALT
Description : Amphoteric substances: w) act as either bases or acids x) precipatate from aqueous solutions y) salt out of basic solutions z) form emulsions in oils
Last Answer : ANSWER: W -- ACT AS EITHER BASES OR ACIDS
Description : Which is an example of a polymer? w) salt x) oil y) plastic z) glucose
Last Answer : ANSWER: Y -- PLASTIC
Description : An alcohol is related to an ester as a hydroxide compound is related to: w) an acid x) a ketone y) an ether z) a salt
Last Answer : ANSWER: Z -- A SALT
Description : Which of the following is a metallic salt of a fatty acid? Is it: w) soap x) plastic y) rubber z) petroleum
Last Answer : ANSWER: A -- SOAP
Description : How does dissolving a salt molecule in water make its atoms ionize? -Space
Last Answer : When salt is mixed with water, the salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules. Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together.
Description : What is produced by dissolving salt in water ?
Last Answer : When salt is dissolved in water, solution is produced.
Description : When Salt dissolving water physical change or chemical change?
Last Answer : It is a physical change because the chemical composition of saltand water do not change. You can separate the salt and waterphysically by allowing the water to evaporate, which leaves thesalt.
Description : What is molarity solution ?
Last Answer : The number of moles of dissolved solution per liter of a solution is called the molarity of that solution.
Description : Why does molality of a solution remain unchanged with change in temperature while its molarity changes?
Last Answer : Molality of a solution depends on the mass of solvent and man does not vary with change in temp. where as molarity depends on volume of solution and volume change with change in temp.
Description : Is salt the slowest dissolving powder?
Description : In Celsius, the freezing point of a one-molal water solution of sodium phosphate, chemical formula Na3PO4, is expected to be: w) - 0.93 degrees Celsius x) - 1.86 degrees Celsius y) - 7.44 degrees Celsius z) - 3.72 degrees Celsius
Last Answer : ANSWER: C -- (- 7.44 DEGREES CELSIUS)
Description : Ethylene diamine tetraacetoacetate (pron: te-tra-a-see-tow-AS-e-tate) (EDTW) is often used for which of the following: w) Determine hardness of water x) Measure the amount of zinc in a solution. y) A preservative in foods z) All of the above
Last Answer : ANSWER: Z -- ALL OF THE ABOVE
Description : A round viewing window with a 20 centimeter diameter is installed in a tank at the Shedd Aquarium. It is 5 meters below the water surface. The force on the window is approximately: w) 1,500 Newtons x) 10,000 Newtons y) 25,000 Newtons z) 50,000 Newtons
Last Answer : ANSWER: W -- 1,500 NEWTONS
Description : Mayonnaise is: w) an emulsion x) a hydrogenated oil y) a covalent solution z) a coalescent solution
Last Answer : ANSWER: W -- AN EMULSION
Description : The compound which would have the greatest molar effect on the colligative properties of a dilute solution would be: w) CaCl2 x) NaCl y) C6H12O6 z) Benzene
Last Answer : ANSWER: W -- CaCl2