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Use the following information to identify the diatomic molecule A and the compound B, then answer the following questions.
An empty glass container has a mass of 658.572 g. It has the mass of 659.452 g after it has been filled with nitrogen gas at a pressure of 790. torr and a temperature of 15.0 degrees C. When the container is evacuated and refilled with the diatomic molecule A at a pressure of 745 torr and a tempurature of 26.0 deg C, it has a mass of 660.590 g.
Compound B is a gaseous organic compound that consists of 85.6% carbon and 14.4% hydrogen by mass. Exactly 18.384 g of the compound is placed in a stainless steel vessle (10.68 L) with 4.63 mol of oxygen gas at 22.0 deg C. The total pressure in the vessel is 11.98 atm.
a) What is the diatomic molecule A?
b) What is compound B?
c) A and B react quantitatively in a 1:1 molar ratio to form one mole of the single product, gas X. Write a balanced equation to determine the molecular formula of gas X.
d) How many grams of gas X will be produced if 10.0 L or A and 8.60 L of B (each at STP) are reacted by opening a stopcock connecting the two samples?
e) What will be the total pressure in the sysem?
Naturally occurring element X exists in three isotopic forms: X-28 (27.977 amu, 92.21% abundance), X-29 (28.976 amu, 4.70% abundance), and X-30 (29.974 amu, 3.09% abundance). Calculate the atomic weight of X.
What is the fraction of NTA present after HT2- has been brought to equilibrium with solid PbCO3 at pH 7.00, in a medium in which [HCO3-] = 1.00E-3 M?
Three resonance structures of the following cation are possible. One resonance form is given below, but it is incomplete. Complete the given structure by adding non-bonding electrons and formal charges where necessary
Explain why recrystallization, as a general technique, is usually effective at removing a few percent of impurity, even though the solubility (g/mL) of the impurity might be similar to that of the main component.
A solution is prepared by dissolving 297 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
Consider the following thermochemical equations : 8Mg(s) + Mg(NO3)2(s) ? Mg3N2(s) + 6MgO(s) ?H°rxn = -3884 kJ Mg3N2(s) ? 3Mg(s) + N2(g) ?H°rxn = +463 kJ 2MgO(s) ? 2Mg(s) + O2(g) ?H°rxn = +1203 kJ Use the above equations to calculate the ?H°f (in k..
A certain weak base, which we will represent by the symbol B, has a basicity constant Kb = 3.7 x 10^-4 at 25 *C. The pH of a solution in which [B] = [BH^+] is
calculate the concentration of calcium ion (in mg/L -1) in the water (25C). What assumptions are made in carrying out the calculation?
What is the concentration of each ion in a solution formed by mixing 44.0 mL of 0.100 M Na2SO4 and 25.0 mL of 0.150 M KCl?
A mixture is prepared from 15.0 l of ammonia and 15.0 l chlorine measured at the same conditions these compounds react according to the following equation 2NH3+3Cl2---> N2+6HCl When the reaction is completed what is the volume of each gas
A 275-g sample of nickel at 100.0C is placed in 100.0 mL of water at 22.0C. What is the final temperature of the water.
Consider the effects of local environment on the acidity of the following amino acid residues within a protein. in each case, state whether the side chain pka of the underlined residue will increase, decrease, or remain the same. then briefly stat..
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