Question

20.0% by mass NH3(aq) has a density of 0.8951 g/mL. What is the molar concentration of this solution?

Answer #1

A 25.1 molal concentration of ammonia (NH3) in water has a
density of 0.982 g/ml. What are the mass percent, molarity and mole
concentration of ammonia in this solution.

A 20.0 wt% solution of CaCl2 (110.98 g/mol) has a density of
1.185 g/mL. What is the mass (in milligrams) of a 19.9-mL solution
of 20.0 wt% CaCl2?What is the mass (in grams) of CaCl2 in 419.4 mL
of a 20.0 wt% solution of CaCl2? What is the formal concentration
of CaCl2 (in molarity) of the 419.4-mL CaCl2 solution described in
the previous question?

A solution of H2SO4(aq) with a molal concentration of 6.25 m has
a density of 1.300 g/mL. What is the molar concentration of this
solution?

A solution of H2SO4(aq) with a molal concentration of 6.80 m has
a density of 1.318 g/mL. What is the molar concentration of this
solution?

An aqueous solution is 5.50% by mass
ammonia, NH3, and has
a density of 0.975 g/mL.
The molality of ammonia in the solution is _______
m

A.) A solution of H2SO4(aq) with a molal concentration of 3.58 m
has a density of 1.200 g/mL. What is the molar concentration of
this solution?
B.) What is the mole fraction of solute in a 3.79 m aqueous
solution?
C.) An aqueous sodium acetate, NaC2H3O2, solution is made by
dissolving 0.155 moles of NaC2H3O2 in 0.650 kg of water. Calculate
the molality of the solution.

Concentrated KOH is 45.0% KOH by mass and has a density of 1.45
g/mL. What is the molar concentration of concentrated potassium
hydroxide?

Concentrated hydrochloric acid is 37.0% HCl by mass and has a
density of 1.18 g/mL. What is the molar concentration of
concentrated hydrochloric acid?

A solution has a density of 1.023 g/mL and a concentration of
0.8000 g/L. What is the concentration in parts per million?

The density of the sample is 0.9977 g/mL, and the molar mass of
calcium carbonate is 100.0 g/mol.
Calculate the mass of calcium carbonate present in a 50.00 mL
sample of an aqueous calcium carbonate standard, assuming the
standard is known to have a hardness of 75.0 ppm. If this wsa
titrated with a 0.00501 M EDTA, what volume of EDTA solution would
be needed to reach the endpoint?
(using the given density of this problem is throwing me off...

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