What mass (in g) of magnesium nitrate, Mg(NO3)2, are required to produce 250.0 mL of a 0.0750 M solution?
(A) 0.0188 g (B) 0.0445 g (C) 1.61 g (D) 2.79 g Solution: Molarity = moles of solute/liters of solution M = 0.0750M V= 250.0ml(...
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Complete Guide to Solutions: Molarity, Molality, % by Mass, Colligative Properties.
Solution is a homogeneous mixture (uniform composition) Solute = what gets dissolved (Example: NaCl) Solvent = what the solute dissolves...
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A solution of NaCl in water has a concentration of 20.5% by mass. What is the molal concentration of the solution?
The formula for molality is molality =moles of solute/kg of solvent We need to assume something since we are only given %. We can assume...
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Complete Guide to Kinetics: Rate Law, Integral Rate Laws, Elementary Reactions.
Table of Contents: Rate Law introduction How to determine the rate law from experimental data How to determine the rate law constant (k)...
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Which substance has ionic bonds?
Which substance has ionic bonds? A) CH4 B) O2 C) H2O D) MgO Solution: A substance that has a metal and a nonmetal is ionic and has an...
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Which type of electromagnetic radiation would have the highest energy
Which type of electromagnetic radiation would have the highest energy? A) ultraviolet radiation B) blue light C) infrared radiation D)...
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The grain size of a piece of very fine sand is 0.0025 inches. What is the correct way to write the number in scientific notation?A) 2.5 × 10–3B) 2.5 × 10–2C)2.5 × 103 D)2.5×102
The grain size of a piece of very fine sand is 0.0025 inches. What is the correct way to write the number in scientific notation? A) 2.5...
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In total, each carbon atom can make how many bonds to other atoms?
In total, each carbon atom can make how many bonds to other atoms? A)2 B)3 C)4 D)5 E)6 Solution: Carbon has four valence electrons...
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Which of the following ions would be unlikely to exist, based on the octet rule? A) S2-B) Mg+C) N3-D) K+ E) F-
Which of the following ions would be unlikely to exist, based on the octet rule? A) S^2- B) Mg+ C) N^3- D) K+ E) F- Solution: An octet...
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Which two elements when combined will form nonpolar covalent bonds
Which two elements when combined will form nonpolar covalent bonds? A) oxygen and sodium B) oxygen and carbon C) nitrogen and oxygen D)...
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