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The most common experimental technique to perform elemental analysis is combustion analysis, where a sample is burned in a large excess of oxygen and the combustion products are trapped in a variety of ways. A 99.99% pure,0.4949g sample containing only carbon, hydrogen, and nitrogen is subjected to combustion analysis, resulting in the formation of 1.386g CO2,0.2817g H2O, and0.1877g NO. What is the empirical formula of the sample?
A can of diet soda floats when placed in a bucket of water. A can of regular soda sinks in the same bucket.Fill in diet soda, regular soda, or water for the following,
A compound made up of only phosphorus and chlorine contains 77.45% chlorine by weight. What is the electron domain geometry of the central atom of this substance?
a 200-ml volume of naoh solution was addedto 400ml of a 2.00 m hno2 solution. the ph of themixed solution was 1.5 units
If a sample of pure silver (Ag) contains 3.35 x 1022 atoms of silver, how many moles of silver are in the sample?
Place the subsequent elements in order of decreasing atomic size largest to smallest: lead, phosphorus, oxygen, cesium, barium, and silicon
Draw molecular structure of the following compounds. Identify the : paraffins, olefins, alkynes, naphthenes,and aromatics.
Question- The higher the concentration acid and conjugate base in a buffer, the smaller the pH change when acid or base is added. Determine whether the above statement is true or false by performing the following calculations
Problem- A gas is collected over water at 320C. At this temperature, water has a vapor pressure of 36 Torr. If the volume of 3.50 moles of the gas is 1.18 L, what is the total pressure
A sample of a complex salt, with ideal composition Ni(NH3)6(NO3)2, was analyzed for nickel by dissolution in slightly acidic solution and precipitation as the dimethylglyoximate, Ni(DMG)2.
A 5.00mL sample of sulfuric acid is titrated with 0.1198M aqueous sodium hydroxide. If 33.93mL of the basis required to reach the end point of the titration
Hemoglobin has a positive charge of +5 and a radius of 3.55 nm in water. How far will the protein travel in one hour in an electrophoresis gel at 25C when a field of 1.0 V cm^-1 is applied if the viscosity of the gel is 0.891 cP
Draw structural formulas for propanal and propanone. From these formulas, do you think that aldehydes and ketones are isomeric with each other. Show evidence and substantiate your answer by testing with a four carbon aldehyde and ketone.
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