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The compound BeBr2 has a total of how many shared electrons and how many non-bonded electrons?
The average concentration of calcium ion in seawater is 412 mg of calcium ion per kg of seawater. What is the molarity of the calcium ion if the density of the seawater is 1.025 g/mL?
3.5 g of a hydrocarbon fuel is burned in a vessel that contains 250. grams of water initially at 25.00 C. After the combustion,the temperature of the water is 26.55 C.
what mass of solid sodium formate (of mw 68.01) must be added to 105 ml of 0.55 mol/l formic acid(HCOOH) to make a buffer solution having a ph of 3.96? ka=0.00018 for HCOOH
Sulfhydryl groups have the ability to react with the alkylating reagent N-ethylmaleimide (NEM) in chemical modification experiments. When NEM is added to a purified solution of creatine kinase
Extraction procedures have shown that nitrogenase contains an iron-sulfur cluster, Fe4S4, where the atoms of each type are arranged alternatively at the corners of a cube.
Ethylene glycol, antifreeze, has a density of 1.11 g/cm^3.a. What is the mass, in grams, of 410 mL of ethylene glycol?
if the level of solution in the column drops below the level of the resin, channels will be formed in the resin column.How will this influence the efficiency of ion exchange in the column?
What reagent could be used to reduce both the nitro and ketone functional groups in a single reaction?
If the pressure increases to 800. torr, how many moles of gas were added to the container? Assume a constant-volume container.
How many cubic centimeters of an ore containing only 0.22% gold (by mass) must be processed to obtain $100 worth of gold.
When 0.2250 g Mg was heated with 0.5331 g N2 gas, all the Mg was consumed forming 0.3114 g Mg3N2.What mass of N2 is left over ?
What is the pH at the point during a titration when 34 mL of 0.200 M HCl has been added to 33 mL of 0.0500 M NH3 solution? HCl is strong acid, Kb = 1.8 × 10-5 for NH3.
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