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Write a chemical equation for the reaction whose enthalpy change is the standard enthalpy of formation, ?H of, of table sugar, sucrose, C12H22O11 (s).
The saturated vapor pressure of mercury is 0.0020 mmHg at 300 K and the density of air at 300 K is 1.18 g/L. (a) Calculate the concentration of mercury vapor in air in mol/L. (b) What is the number of parts per million (ppm) by mass of mercury in ..
Hydrocyanic acid (HCN) is a weak acid with Ka = 4.9 x 10-10. The pH of a solution that contains equal numbers of moles of HCN and KCN is closest to
Consider the molecule cyclohexane, which contains only hydrogen and carbon atoms. When a sample is burned in oxygen, 4.822 g of CO(2) and 1.650g of H(2)O are obtained. What is its simplest formula?
Celsius is allowed to expand into an evacuated vessel of 2.50 L volume. Does the gas do work? Explain
A mixture of .220 moles CO, .350 moles H2 and .640 moles He has a total pressure of 2.95 atm. What is the pressure of CO
A student in lab has 3.00 g of pure N2 in 0.541 g pure H2. The reaction happens following this equation: N2(g) + 3H2(g) → 2NH3(g) How many grams of NH3 would be produced?
What is the molarity of the Na 2 S 2 O 3 solution if a 0.150 g sample of KIO 3 required 10.7 mL of Na 2 S 2 O 3 solution for its standardization?
If 24g Mg is used the percentage yield is 95% how many gramns of magnesium hydroxide should be recovered? Write balanced equation for reaction.
According to the following reaction, how many grams of sulfurous acid (H2SO3) will be formed upon the complete reaction of 21.5 grams of water with excess sulfur dioxide? sulfur dioxide (g) + water (l) sulfurous acid (H2SO3) (g)
Calculate the mass of nitrogen dissolved at room temperature in an 76.0L home aquarium. Assume a total pressure of 1.0 atm and a mole fraction for nitrogen of 0.78
mixed in water and treated with 53.20 mL of 0.1030 M I2 (253.80amu) according to the equation C6H8O6 (s) + I2 (aq) ----> C6H6O6 (aq) + 2HI (aq)
A piece of sodium metal reacts completely with water as follows. 2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g) The hydrogen gas generated is collected over water
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