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A sample of a compound is analyzed and found to contain 17.204g K , 7.062g S, and 14.080g O. What is the percent composition of this compound?
How many grams of methane [CH4 (g)] must be combusted to heat 1.19 kg of water from 25*C to 60*C, assuming H2O (l) as a product and 100% efficiency in heat transfer?
The volume of a gas is 2.50 L, measured at 1.00 atm. What is the pressure of the gas in mmHg if the volume is changed to 9.41 L
compute the enthalpy change, (Delta H), for this reaction per mole of A. suppose that the specific heat =[4.18J/(g*Degrees C) and density=1.00(g/mL)?
when rubidium metal is exposed to air one rb atom is combined with two oxygen atoms. if 1.75g of rb is exposed to air
If the solution contains a metal cation such as \rm Ag^+, the flow of electrons will reduce the silver ion, causing solid silver to plate onto the electrode.
A sample of a gas occupies a volume of 1063 mL at 83ºC and 0.22 atm. What would be the new volume if temperature decreases to 34ºC and pressure increases to 1.22 atm
1. a researcher mixed 5.00 ml of 2.03 x 10-1 m feno33 with100.00ml of 2.05 x 10-3 m kscn using 5.0 x 10-1 m hno3
why doen't the mass number decrease? (because there is one less neutron). But the atomic number increases due. What happens to the electrons?
what is the final temperature of the block after the evaporation of the alcohol. Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block
a saturated solution of potassium chloride is prepared in 100.0g of water at 20c. if the solution is heated to 50c how
what mass of H2O is required to form 1.6 l of O2 at a temperature of 273 k and pressure of .936 atm
Find the concentrations of the ions and of acetic acid in a 0.1 M solution of acetic acid at the body (pH of 7.4) H3O+, CH3CO2-1, CH3CO2H.
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