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If 26.43 mL of a standard 0.1650 M NaOH solution is required to neutralize 25.23 mL of H2SO4, what is the molarity of the acid solution
You are given solutions of HCl and NaOH and must determine their concentrations. You use 30.6 mL of NaOH to titrate 100. mL of HCl and 18.0 mL of NaOH to titrate 50.0 mL of 0.0796 M H2SO4. Find the
olutions of sucrose (table sugar, C12H22O11) are used in high speed centrifuges to separate the parts of a biological cell. How many liters of 3.53 M sucrose contain 111 g of solute
The molecular formula for a compound is CX4. If 2.819 g of this compound contains 0.102 g of carbon, what is the atomic weight of X
For the reaction [NH3] + [H3O+] draw the conjugate acid and base products of each reaction. Also determine whether the acid-base equilibrium would lie on the left or the right.
Breathing air that contains 4.0% by volume CO2 over time causes rapid breathing, throbbing headache, and nausea, among other symptoms. What is the concentration of CO2 in such air in terms of mol per
Enter the net ionic equation for the reaction of aqueous sodium chloride with aqueous silver nitrate.
What is the net ionic equation of the reaction of FeCl2 with NoOH ? Express your answer as a chemical equation.
What is the freezing point of 0.525 m (molal) aqueous solution of glucose (C6H12O6)? [Data: Kf = -1.86 oC/m for water]
The osmotic pressure of a solution formed by dissolving 85.0 mg of aspirin (C9H8O4) in 0.250 L of water at 25 °C is __________ atm.
The Henry's law constant for N2 in water at 37 °C is 8.2 × 10-7 M/mm Hg. What is the equilibrium concentration of N2 in water when the partial pressure of N2 is 605 mm Hg
13When heated in a flame, sodium atoms emit light with a frequency of 5.09 × 1014 s-1. What is the wavelength of this radiation in nm? [Data: c = 2.998 x 108 m/s ]
A compound containing nitrogen and oxygen is decomposed in the laboratory and produces 1.78 g of nitrogen and 4.05 g of oxygen. Calculate the empirical formula of the compound.
In countries where potassium iodide is added to salt, iodine deficiency or goiter has been almost completely eliminated. The recommended daily allowance (RDA) for iodine is 150 pg/day.
A 2.45-g sample of strontium completely reacts with oxygen to form 2.89 g of strontium oxide. Use this data to calculate the mass percent composition of strontium in strontium oxide.
(a). What is the trend in electronegativity going from left to right in a row of the periodic table? (b) How do electronegativity values generally vary going down a column in the periodic table?
Ascorbic acid has a molar mass of 176.14 g/mol . What is the molecular formula of ascorbic acid
What is the empirical formula of ascorbic acid, given that the pseudoformula is C3.41 H4.53 O3.41
What is the pseudoformula of ascorbic acid, given that ascorbic acid contains 3.41 mol of carbon, 4.53 mol of hydrogen, and 3.41 mol of oxygen
Calculate the number of moles Cl of atoms in 3.61×10^24 formula units of magnesium chloride,MgCl2
The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 355g of pure Cu
Ammonia,NH3 ; ammonium nitrate,NH4NO3 ; and ammonium hydrogen phosphate (NH4)2HPO4, , are all common fertilizers. Rank the compounds in order from largest mass percent of nitrogen to smallest mass p
Ascorbic acid (vitamin C) contains 40.92% carbon, 4.58% hydrogen, and 54.50% oxygen by mass. Assume a 100-g sample of ascorbic acid. How many moles of carbon, hydrogen, and oxygen are present in a 10
Assign each species to the expression that most accurately describes the basic units of that substance.
Classify the substances as atomic elements, molecular elements, molecular compounds, or ionic compounds