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A 27.21 g sample of a substance is initially at 25.4 °C. After absorbing 2591 J of heat, the temperature of the substance is 199.8 °C. What is the specific heat (c) of the substance?
crystallizes with the body-centered cubic unit cell. Calculate the radius of a sodium atom. and what is the edge length of the cell in picometers?
What is the concentration of [Cl?] in a solution of 10 mL of 12 M HCl when 6 mL of water is added?
Three sparingly soluble salts, MA, MA2, and MA3, all have Ksp = 1.5 x 10-7. Determine which of these three has the highest molar solubility in water? a) MA, b) MA2, c) MA3 ,d) They are all equally insoluble.
Ammonium Nitrate absorbs 3.30 x 10^2 J of heat per gram dissolved in water. In a coffee-cup Calorimeter, 4.40 G NH4NO3 is dissolved in 100 g of water at 21.0 degrees celsius. What is the final temperature of the solution
Explain the characteristics of a single, double, and triple bonds including why they form
Consider a different titrant for this exercise. Suppose Ca(OH)2 were used as the titrant, instead of NaOH. This will make the titrant twice as concentrated in hydroxide ion. The analyte will still be HC2H3O2.
an unknown organic compound has the empirical formula c2h2o. a solution of 3.775 g of the unknown compound dissolved in
Consider the following standard reduction potentials in acid solution: Cr3+ + 3e- ? Cr Eo = -0.74 V, Co2 + 2e- ? Co Eo = -0.28 V, MnO4 + 8H+ + 5e- ? Mn2+ + 4H2 Eo = +1.51 V
Draw all of the Lewis structures of NO2+ which obey the octet rule and use this Lewis structure or these resonance structures to predict how many covalent bonds connect each oxygen atom in the real structure to the central N atom.
A compound contains only carbon, hydrogen, nitrogen and oxygen. Combustion of 0.314 g of the compound produced 0.426 g CO2, and 0.0620 g H2O.
Explain what is meant by a spontaneous process. Is a spontaneous process necessarily a rapid one? Explain, and provide a real reaction as an example to illustrate your answer.
What is the IUPAC name of propyl butly ketone. a. the root name is based on the longest chain which contains the carbonyl carbon b. the oxygen atom is never bonded to the C-1 c. both (a) and (b) d. neither (a) nor (b)
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