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How many atoms are there in 5.10 moles of sulfur (S)? How many moles of calcium (Ca) atoms are there in 77.4 g of Ca? What is the mass in grams of 1.00 × 1012 lead (Pb) atoms? Describe how you would determine the isotopic abundance of an element from its mass spectrum.
What is the term for an attraction between two molecules with temporary dipoles
undergo an isothermal compression until the pressure of the system is four times the original pressure. The process may occur in two ways:
If 12.5 g of CCl3F is enclosed in a 1.1 -,L container, will any liquid be present? What is the mass of the liquid?
A piece of silver with a mass of 418 g has a heat capacity of 99.1 J/Celcius. What is the specific heat of silver
a solution is prepared by mixing 0.0400 mol ch2cl2 and 0.0800 mol of ch2br2 at 25degc. assuming the solution is ideal
Write the reactions for the preparation of the diaonuim salt for the coupling of the salt with the sodium salt of 2-napthol. 2. Write the reaction of the sodium salt of para red when treated with 1 M H2SO4. Why does a precipitate form?
Differentiate between the dfferent bond types of orbital overlap required to obtain a sigma bond and pi bonds
It is filled with helium at 23 oC and 0.991 atm and placed in an oil bath. To what temperature (oC) will the oil bath need to be heated to first open the safety valve?
compounds x and y have the formula c6h12.nbsp both x and y react with one molar equivalent of hydrogen in the presence
The MnO4(-) is often used to analyze for the Fe(2+) content of an aqueous solution via the reaction MnO4(-) + Fe(2+) ---> Fe(3+) + Mn(2+) in acidic solution. What is the ratio of Fe(2+):MnO4(-) in the balanced equation
A 23.7-g sample of ethylene glycol, a car radiator coolant, loses 906 J of heat. What was the initial temperature of the ethylene glycol if the final temperature is 32.5 degrees Celsius (c of ethylene glycol=2.42 J/g*K)
Calculate the pH during the titration of 20.00 mL of 0.1000 M C6H5COOH(aq) with 0.1000 M NaOH(aq) after 19.54 mL of the base have been added. Ka of benzoic acid = 6.5 x 10-5.
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