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What is the mass of 3.20 moles of magnesium chloride,MgCl2 ? Express your answer with the appropriate units. mass of MgCl2 =
A Breathalyzer instrument contains two ampules, each of which contains 0.75 mg K2Cr2O7 dissolved in 3 mL of 9 mol L?1 H2SO4(aq). One of the ampules is used as reference. When a person exhales into the tube of the Breathalyzer, the breath is direct..
how much aspirin is recovered? Solubility of aspirin in water at 25oC is one gram of aspirin per 300 milliliters of water.
Which reagent is used in excess? How great is the molar excess (how many times greater)? I'll add the procedure images in the comments
Use the rydberg equation to calculate the wavelength in nm of the photon when an electron in a hydrogen atom undergoes a transition from n=6 to n=2
The Henry's law constant for O2 in water at 25 Celsius is given in Table 14.2. Which of the following is a reasonable constant when the temperature is 50 Celsius? Explain the reason for your choice.
how many milligrams of hydrazoic acid ( ka= 1.9x10^-5) must be in a 5.0-L solution that has a pH of 4.90?
Describe the characteristic IR absorption frequencies in cm -1 that would allow you to distinguish between the following pair of compounds.
When completely filled with water, the beaker and its contents weigh 297.65 g. Use d=100 g/mL as the density of water. What volume does the beaker hold?
Solutions of strontium hydroxide, silver nitrate, hydrogen phosphate, potassium nitrate, and copper (II) sulphate are prepared and placed in separate containers. Consider the reaction of the pairs of these compounds.
Therefore aspartame will have an isoelectric point at a pH between the pKa values of these functional groups. Find the values for these two groups of aspartic acid and calculate a predicted pI value for aspartame.
Classify the solid state of the following substances as ionic crystals, covalent crystals, molecular crystals or metallic crystals: (a) CO2 (b) B12 (c) S8 (d) KBr (e) Mg (f) SiO2 (g) LiCl (h) Cr
Wichita of the following can make a buffer system?
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