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Get college assignment help at uniessay writers A gas expands and does P-V work on the surroundings equal to 285 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system?

By dividing MM of molecular formula by MM of empirical formula,

By dividing MM of molecular formula by MM of empirical formula, one can determine multiple by which all subscripts in empirical formula must be multiplied to obtain molecular formula. Test Yourself: (Problem 3.107) Lysine, an essential amino acid in the human body, contains C, H, O, and N. In one experiment, the complete combustion of 2.175 g of lysine gave 3.94 g CO2 and 1.89 g H2O. In a separate experiment, 1.873 g of lysine gave 0.436 g NH3. What is the empirical formula of lysine? If the approximate MM of lysine is 150 g/mol, what is the molecular formula?

What is the wavelength of radiation of frequency 4.80 × 10^13

What is the wavelength of radiation of frequency 4.80 × 10^13 s^−1?

How many valence electrons are shown in th Lewis Structure of

How many valence electrons are shown in th Lewis Structure of perchlorate ion,ClO4?

What is the minimum mass of each reactant necessary to produce

What is the minimum mass of each reactant necessary to produce 200 g of sulfuric acid in nthe following reaction? 2 SO2 O2 2 H2O yield 2 H2SO4

A sample of neon effuses from a container in 77 seconds.

A sample of neon effuses from a container in 77 seconds. The same amount of an unknown noble gas requires 157 seconds. identify the gas

Calculate the mass of water produced when 2.75 of butane reacts

Calculate the mass of water produced when 2.75 of butane reacts with excess oxygen

Part B.1. The hydrated salt is overheated and the anhydrous salt

Part B.1. The hydrated salt is overheated and the anhydrous salt thermally decomposes, one product being gas. Will the reported percent water in the hydrated salt be reported too high, too low, or be unaffected? Explain.

copper dissolved in nitric acid producing copper nitrate. after reaction with

copper dissolved in nitric acid producing copper nitrate. after reaction with sodium hydroxide and heating, copper nitrate changed to copper oxide. calculate the percent yield of this process if 1.075 g of copper produced 1.075 g of copper oxide.

A gas expands and does P-V work on the surroundings equal

A gas expands and does P-V work on the surroundings equal to 315 J. At the same time, it absorbs 153 J of heat from the surroundings. Calculate the change in energy of the gas.

A gas originally at 27 degrees celsius and 1.00 atm pressure

Get college assignment help at uniessay writers A gas originally at 27 degrees celsius and 1.00 atm pressure in a 3.9 L flask is cooled at constant pressure until the temperature is 11 degrees celsius. The new volume of the gas is __________ L.

what is the net equation representing a solution Na2O mixed with

what is the net equation representing a solution Na2O mixed with a solution CuBr2?

An aerosol spray can of deodorant with a volume of 350

An aerosol spray can of deodorant with a volume of 350 mL contains 3.0 g of propane gas C3H8 as propellant.

how many electrons are lost or gained in forming each ion

how many electrons are lost or gained in forming each ion Ba2 As3- Cu2

What is the pH of 0.3 M ammonia if the Ka

What is the pH of 0.3 M ammonia if the Ka for its conjugate acid, ammonium chloride, is 5.5 × 10^−10. 1. 11.4 2. 4.3 3. 0.002 4. 8.7 5. 2.6

What is the pH of a 0.3 M solution of pyridinium

What is the pH of a 0.3 M solution of pyridinium chloride (C5H5NHCl)? Kb for pyridine (C5H5N) is 1.5 × 10^−9. Show all works 1. 2.849 2. 3.219 3. 9.327 4. 2.609 5. 2.979 6. 2.699 7. 5.176 8. 8.824 9. 7.000 10. 4.673

if 6.42 g of water is produced, how many grams of

if 6.42 g of water is produced, how many grams of oxygen gas reacted

A student placed 10.0 g of glucose (rm C_6H_{12}O_6) in a

A student placed 10.0 g of glucose (rm C_6H_{12}O_6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-rm mL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 35.0-rm mL sample of this glucose solution was diluted to 0.500 rm L. How many grams of glucose are in 100. rm mL of the final solution?

The specific heat of aluminum is 0.902 J at 25C. How

The specific heat of aluminum is 0.902 J at 25C. How much heat, in kJ, does it take to raise the temperature of a 12.0 g chunk of aluminum from 15.5C to 35.5C?

how many grams of KClO3 are needed to form 6.13g O2?

how many grams of KClO3 are needed to form 6.13g O2?

An unknown mass of each of the following substances, initially at

An unknown mass of each of the following substances, initially at 2.0, absorbs 1970 of heat. The final temperature is recorded as indicated. Find the mass of each substance. Pyrex glass (55.6 C’) what is its weight? sand (62.0′) what is its weight? ethanol(44.2′) what is its weight? water(32.2′) what is its weight?

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