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A flask contains 0.350 grams of liquid Br( bromine), . calculate the number of (Br)bromine molecules present in the flask
A calorimeter contains 19.0 grams of H2O at the temperature of 14 degree Celsius. When 1.20 grams of a substance is combined, it mixed via the reaction it is given that the substance has molar mass =57.0 temperature of the solution increases to 27.5 degree Celsius. compute the enthalpy change, , for this reaction per mole of substance .the specific heat =density of the resulting solution = those of water [4.18 and 1.00 ]
What mass of Au is produced when 18.6 ampere of current are passed through a gold solution for 29.0 minutes.
Calculate the pH of this solution? if we want to lower the pH by one unit of this solution then How many mL of 0.1 M H 3 PO 4 should be added to this solution?
Evaluate the energy of an electron excited from a hydrogen atom using Bohr's model. Determine the maximum wavelength of energy needed to observe a photoelectric effect for potassium.
Determine how many grams of sodium chloride are required to prepare 250. mL of this solution. (if given the density of the saline solution is 1.0 g/mL)?
Calcium carbonate and sand mixture with weight of 4 grams is reacted with excees of HCl results in the production of carbon dioxide then find out the percent of calcium carbonate in the original mixture?
Name the highly volatile liquid may cause grave danger to The Environmental Health & Safety and Fire Safety professionals at happening scenes as its vapor
Determine the percent yield if a student decomposes H 2 O to Form hydrogen (H) and oxygen(O). If the student starts with 34.7 grams of H2O and collects 20.0 grams of oxygen,
Determine what volume would it occupy at zero degree Celsius temperature at same pressure? Express your Answer in units of mL
A tablet of Vitamin C changed color at 23.7 mLs of Iodine. how do you determine how much vitamin c is in the tablet.
Determine the numbers of oxygen molecules are required for each molecule of C 6 H 12 O 6 glucose that is oxidized if Glucose is oxidized by molecular O 2 to CO 2 and H 2 O?
Determine how many grams of Hydrogen are required to form 14.01grams of Ammonia and calculate how many grams of ammonia could be formed
Determine the molarity of the NaOH(sodium hydroxide) solution. In an acid-base titration, 22.13 mL of a sodium hydroxide solution are required to neutralize 24.65 mL of the potassium hydrogen phthalate solution?
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