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Explain what is the molecular formula of the substance whose molecular mass is 78.12 and whose empirical formula mis CH.
The normal boiling point for acetone is 56.5°C. At an elevation of 5300 ft the atmospheric pressure is 630. torr.
Compounds E and F give a precipitate while treated with ammoniacal silver nitrate compound D gives no reaction. Compound D and E show an absorption maximum near 230 nm. Compound F demonstrates no absorption maximum beyond 200 nm. Offer structures ..
whats the difference between physicalchemical change and physicalchemical property? how is energy involved in chemical
Calculate the pH of this solution. When 0.20 mol of H+ ions is added to the solution what is the pH (assuming volume change is negligible)
At high temperatures phosgene (COCl2) decomposes to give carbon monoxide CO and Cl2. In a typical experiment, 0.631 g of COCl2 is injected into a flask of volume 472 cc.
The active site of an enzyme is a small portion of the enzyme molecule. What is the function of the rest of the large molecule
When making an alcoholic beverage, such as beer and wine, Brix is a measurement used to assess the amount of sugar present in the fermentation matrix or grape juice.
When 26 mL of a 155 mL stock solution containing 2.1 M AlCl3 is diluted to 76 mL, what is the concentration of Cl- in the new solution
A 0.160-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium. Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
a 1.5-kg copper block is given an initial speed of 4.0 ms on a rough horizontal surface. because of friction the block
At equilibrium, it is found that .25 moles of COCl2 remain. What is the equilibrium concentration of CO?
Predict whether a precipitation reaction will occur when aqueous solutions of the following substances are mixed:
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