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A scientist isolates 2.366g of a gas. The sample occupies a volume of 800.0 mL at 78.00 degrees celsius and 103.0 kPa. If the scientist uses the data, what is the calculated molar mass of the gas?
Write a chemical equation representing the second ionization energy for lithium. Use e- as the symbol for an electron.
A piece of iron weighing 85.690 g was burned in air. the mass of the iron oxide produced was 118.350 g. What are the moles of iron in the original sample
What is the pH at the stoichiometric point (end point) for the titration of 50 ml of 0.20 M methyl amine CH3NH2 (aq) with 0.20 M perchloric acid HClO4(aq)? For methyl amine (CH3NH2), Kb = 3.6 x 10^-4.
What mass of water (in grams) is contained in 2.9 L of the vapor above this solution at 55 C. The vapor pressure of pure water at 55 C is 118 torr. (Assume a van't Hoff factor of 1.9 for NaCl.)
A suspension of vanillin (2.5838 g, 16.98 mmol) and sodium hydroxide (0.022 g, 22 mL, 1M) was coolied in an ice-water bath before adding sodium borohydride (0.41s g, 10.89 mmol) while swirling the mixture. After addition of the sodium borohydride ..
Suppose you dope that 1cm3 sample of silicon with 1ppm of phosphorus that will increase the conductivity by a factor of a million. How many milligrams of phosphorus are required
A NMR spectrum shows a singlet at 7.3 ppm, a triplet at 4.3, a triplet at 2.9, and a singlet at 2.0. The relative areas are 5, 2, 2, and 3 respectively. What is the structure of the compound
While a 5.00-g sample of KCl is dissolved in water in a calorimeter that has a total heat capacity of 2.403 kJ•K-1, the temperature decreases by 0.480 K. Compute the molar heat of solution of KCl.
Mixed Aldol Each of the following compounds can be prepared by a mixed aldol condensation reaction. Give the structure of the aldehyde and/or ketone precursors for each aldol product and formulate the reaction.
Consider the following distribution of objects: a 1.00-kg object with its center of gravity at (0, 0) m, a 4.20-kg object at (0, 6.00) m
Calculate the mass of glucose in a 110 sample of a 1.14 M glucose solution.
The empirical formula of a compound is found to be P2O5. Experiments show that the molar mass of the compound is 560g/mol. What is the molecular formula of the compound?
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