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Elemental analysis of a compound containing H, B and O gave 1.3% H and 27.5% B. The molecular weight of the compound is 157.3. What is the molecular formula of the compound? a. H3B5O6 b. H2B4O7 c. H2B5O9 d. H2B4O8
how many grams of sodium formate nacho2 must be added to 750.0ml of .250 m of formic acid hcho2 to obtain a buffer with
Which statement is true for the cell as it discharges?
We had to do an experiment that depolymerized PET into terephthalic acid and ethylene glycol using 1-pentanol and KOH. One of the post-lab questions is as follows:
For a given reaction, the reaction forms predominantly products at equilibrium (i.e. it essentially goes to completion). Which of the following represents a reasonable value for K
a student makes 215 ml of a 3.15m solution of na2so4. he then forgets to seal it and some water evaporates overnight.
the hydrated salt is overheated and the anhydrous salt thermally decomposes one product being a gas. will the reported
Estimate the solubility of silver iodide in pure water at 25 degrees Celsius (a) in moles per liter and (b) in grams per liter.
Why is the reaction of the dissolving ammonium nitrate (NH4NO3) in water spontaneous even though the dissolution is endothermic
A solution of water and a nonvolatile, nonionizing compound is placed in a tube with a semipermeable membrane on one side. the tube is placed in a beaker of pure water. What initial net effect will occur?
How would the ground-state energy levels of X and H compare and would the energy of an electron in the n = 2 level of H be higher or lower than that of an electron in the n = 2 level of X? Explain your answer.
a solution of i2 was standardized with ascorbic acid. using a 0.100 g sample of pure ascorbic acid 25.32 ml of i2 were
Draw Fischer projections for the two D-aldoheptoses whose stereochemistry at C3, C4, C5, and C6 is the same as that of D-idose at C2, C3, C4, and C5
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