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A sample of an oxide of iron weighing 2.40g was heated in a stream of hydrogen until it was completely converted to the metal, If the metal weighed 1.68g, what is the formula of the iron oxide? (fe =56, O = 16)
The double-replacement reaction below results in the formation of the precipitate lead chloride. Balance the equation and write the net ionic equation.
How many mL Hydrochloric acid of 0.1 M must be added to 100 mL of a 0.2 M solution of tris base to form a buffer ( pH 7.8)?
How many joules of heat are required to heat 167 g of aluminum from 34.0 oC to 66.5oC?
The heat combustion of ch4 is 890.4 the heat capacity of h20 is 75.2. find the volume of methane measured at 298k and .690atm reauired to convert
Determine the room temperature heat capacities at constant pressure for the following materials: aluminum, silver, tungston and 70Cu-30Zn brass
Assume the radius of a neutron to be approximately 1.0; times ;10^{ - 13} {rm cm}, and calculate the density of a neutron. [Hint: For a sphere V = (4/3)pi r^3.]
calculate the molecular weight of phosphorus if 2.3437 grams are dissolved in 50.00 grams of para-dibromobenzene and the solution freezes at 81.35 degrees C.
determine the freezing point of a solution of 60.0g of glucose,C6H12O6,dissolved in 80.0g of water.
Aluminum reacts with excess hydrochloric acid to form aqueous aluminum chloride and 36.8 mL of hydrogen gas over water at 27°C and 764 mmHg. How many grams of aluminum reacted?
A 100ml sample of sodium bromide containde co104.62g of sodium bromide. upon evaporation, 6.280g of reside was obtained. frome this data calculate each of the folowing for the solution
A mixture of 82.49 g of aluminum ( Picture = 26.98 g/mol) and 117.65 g of oxygen ( Picture = 32.00 g/mol) is allowed to react. What mass of aluminum oxide ( Picture = 101.96 g/mol) can be formed?
If 25.00 mL of 0.07976 M benzoic acid is neutralized by 26.48 mL 0.07530 M NaOH, calculate the quantities of benzoic acid and NaOH you would need to prepare the volume of 1:1 buffer.
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