Get college assignment help at uniessay writers What is the density of NH3 at 800 torr and 25 degrees celsius? What is the density of NH3 at 800 torr and 25 degrees celsius?
Avogadro’s number is big. If you had that number in dollars, you could spend it at 1 billion (109) per second for your entire life (≈75 years), what approximate percentage of your original money would you have left?
How much work is done (in kilojoules), if 87.0 of ethylene and 130 of are allowed to react at atmospheric pressure and the volume change is -69.5 ?
Automobile batteries use 3.0 M H2SO4 (battery acid) as an electrolyte. How much 1.45 M NaOH will be needed to neutralize 215 mL of battery acid? H2SO4(aq) 2NaOH(aq) –> 2H2O(l) Na2SO4(aq)
helium is collected over water at 25C and 1atm total pressure. what total volume of gas must be collected to obtain .586g of helium? (at 25C the vapor pressure of water is 23.8toor.)
A volume of 90.0 mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4)What was the molarity of the KOH solution if 22.2 mL of 1.50 M H2SO4 was needed? is 2KOH(aq) H2SO4(aq )——>K2SO4(aq) 2H_2O(l) Express the molar concentration numerically.
What is the [H3O ] in a buffer that consist of .30 M HCOOH and .20 M HCOONa? Ka= 1.7 x 10^-4
briefly explain how the following procedural errors would affect the calculated mass percent of NaHCO3 in an NAHCO3-NaCl a student, rushing to complete the mixture analysis, continued to strongly heat her sample after it melted.
Consider the nitryl cation, NO2 . Write all possible Lewis structures for this ion. Draw the molecule by placing atoms on the grid and connecting them with bonds. Show the formal charges of all atoms in the correct structure. Include all lone pairs of electrons.
Calculate the molality of an aqueous solution of NaNO3 that has a boiling point of 102.5°C? For water, Kb = 0.52°C/m. Boiling point of water is 100.0°C.
Get college assignment help at uniessay writers In accordance with the solubility rules, which of the following will occur when solutions containing about 0.1 g of Pb(NO3)2(aq) and KI(aq) /100 mL are mixed?
a constant volume vessel contains 12.5g of a gas at 21 degrees C. If the pressure of the gas is to remain constant as the temperature is raised to 210 degrees C, how many grams of gas must be released
A piece of metal of mass 18 g at 117◦C is placed in a calorimeter containing 48.2 g of water at 21◦C. The final temperature of the mixture is 85.4◦C. What is the specific heat capacity of the metal? Assume that there is no energy lost to the surroundings.
When 0.91 g. of sugar (C12H22O11; mol. wt. 342 g./mole) was burned in a bomb calorimeter in an excess of oxygen, complete conversion to CO2 and H2O was obtained and the temperature of the calorimeter rose by 3.5oC. If the heat capacity of the calorimeter is 4250 J K-1, what is the molar enthalpy of combustion of sugar?
please solve for the question “004” in the attached file
please solve for the question “005” in the attached file
Q009 – please solve for the attached question.
what is the empirical formula of a compound that contains 30.4% nitrogen and 69.6% oxygen by mass?
Will a precipitate form when 1.00 L of 0.150M iron(II) chloride solution is mixed with 2.00 L of 0.0333M sodium hydroxide solution? Explain your reasoning and show your calculations.
A gas is enclosed in a 10.0 L tank at 1200 mmHg pressure. Which of the following is a reasonable value for the pressure when the gas is pumped into a 5.00 L vessel?
tin layer chromatography
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