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A 2.45-g sample of strontium completely reacts with oxygen to form 2.89 g of strontium oxide. Use this data to calculate the mass percent composition of strontium in strontium oxide.
Hydrogen gas is collected at 29 c the total pressure of the system is 773 torr. If the vapor pressure of water at 29c is 30 torr what is the partial pressure of the hydrogen gas?
Could you tell me what is the purpose of this reaction (Michael and aldol condensation reactions), and the stepwise mechanism of the reaction.
Calculate the molar concentration of H+ ion of a 1.86×10-1 M solution of the weak acid HClO (make an approximate calculation assuming that initial concentration is equal to the equilibrium
95.0 mL of H_2O is initially at room temperature (22 C). A chilled steel rod at 2 C is placed in the water. If the final temperature of the system is 21.4 C, what is the mass of the steel bar?
Enough of a monoprotic acid is dissolved in water to produce a 1.59 M solution. The pH of the resulting solution is 2.88. Calculate the Ka for the acid. Ka=?
A compound of forumula C14H12 gave a positive Baeyer test and burned with a yellow, sooty flame. Treatment with ozone followed by hydrolysis in the presence of zinc gave formaldehyde as one of the products.
Methyl alcohol (CH3OH) has a density of 0.793 kg/L. What volume of it is needed to add to water to make 5 liters of 0.250 M solution?
Calculate the wavelength in picometer of gamma ray radiation whose frequency is 9.74 × 1019 Hz. Express answer in scientific notation.
find the molecular weight of a gaseous compound if the density is 12.24 g/L, the pressure is 900 torr, and the temperature is 47 degrees celcius.
What is the equilibrium pH of the solution? Solve by graphical method (draw a log C -pH graph and label the pertinent info, show your charge balance for the equation)
Describe 3 types of marine life and how they are affected by the increase of acidity in the oceans.
A normal value for blood cholesterol is 200mg/dl of blood. If a normal adult has a total blood volume of 5 L, how much total cholesterol is present.
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