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A solution is prepared by mixing 35.00 ml of 0.061 M Zn(NO3)2(aq) with 20.00 ml of KOH(aq) with 20.00 ml KOH(aq) with a pH of 9.00.
a) will zinc hydroxide precipitate (Ksp zn(oh)2=4.0*10-17)
b) calculate the molar solubility of zinc hydroxide in 0.050 M MgCl2.
A sample of a gas occupies 1470 mL at 60.7?C and 740 torr. What volume would it occupy at the same pressure and 450?C.
A 40.2 L volume of methane gas is heated from 25°C to 86°C at constant pressure. What is the final volume of the gas?
To prevent tank rupture during deep-space travel, an engineering team is studying the effect of temperature on gases confined to small volumes. What is the pressure of 3.20mol of gas measured at 251 degrees Celcius in a 1.75-L container assuming r..
A coffee-cup calorimeter contains 140.0 g of water at 25.2 *C. A 122.0 g block of copper metal is heated to 100.4 *C by putting it in a beaker of boiling water.
The value of nD20 for a mixture can be approximatedas the weighted average of the refractive indices ofthe individual components. For a heptane/alpha-pinene mixture nD20 (mixture)=VheptanenD20 (heptane) + VpinenenD20 (pinene)
A compound consist of 40.00% carbon, 6.71% hydrogen and 53.29% oxygen and has a molecular mass of 180+- 1g/mole. Determine the empirical and molecular formulas of the compound.
Consider the bonding and bond order in H2 +, H2, He2 +, and He2 to explain the bondlengths of 106 pm, 74 pm, 108 pm, ~6000 pm, respectively.
In an equation for neutralization reaction that forms an aqueous solution of calcuim nitrate, the reactantsmight be
She pours a 50.0 mL sample of water at 345 K into the calorimeter containing a 50.0 mL sample of water at 298 K. She carefully records the final temperature of the water as 317 K. What is the value of Ccal for the calorimeter?
A mixture of 4.0 mol of H2 and 2.0 mol of O2 is placed in a sealed evacuated container made of a perfect insulating material at 27C. The mixture is ignited with a spark and it reacts to form liquid water. Find the temperature of the water.
The Ksp of barium carbonate (BaCO3) is 5.0*10^-9 at 25.0 C. If a 20.0 mL sample of 0.1 M Ba(NO3)2 is added to 50.0 mL of 0.1 M Na2CO3.
how much heat in kilojoules is evolved or absorbed in the reaction of 275.0 rm g of calcium oxide with enough carbon to
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