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When 1.75 g of CaCl2 dissolves in 125 g of water in a coffee cup calorimeter, the temperature increases by 2.44 C. What is the heat change per mole of CaCl2 dissolved in water? Assume that all the heat is absorbed by the water. (c = 4.18 J/g C)
Offer a brief explanation of why bandgaps for octet p-block semiconductors (1) decrease with increasing average principal quantum number
Why does the haloform reaction only work for methyl ketones and not for compounds such as 3-pentanone?
How many liters of chlorine gas, measured at STP, would be produced by the electrolysis of molten sodium chloride using a current
Write the chemical equation for all the reactions both SN1 and SN2 involving primary and secondary substrates b) Rank the primary halide in order of increasing reactivity toward SN2
Determine how much heat is formed by this reaction if a typical packet has 250 g of Fe to warm your hands (or feet for up to 4 h) express your answer in kJ?
a basketball is inflated to 9.0 psi (pounds per inch) above atmosphere pressure of 14.7 psi ( a total pressure of 23.7 psi). The diameter of the basketball is 10 inches. What is the pressure of the air in the basketball, expressed in atmospheres?
A researcher found that 11.56 grams of lead sulfide, PbS, were formed when 10.0 grams of lead reacted with 1.56 grams of sulfur, when 10.0 grams of lead reacted with 3.00 grams of sulfur, and when 18.0 grams of lead reacted with 1.56 grams of sulf..
vitamin tablet contains 125 mg of vitamin C (C6H8O6). How many vitamin C molecules are contained in the tablet?
The absence of an alkene C=C IR stretch is definitive evidence that a compound lacks an alkene functional group.
.20g of methyl alcohol, CH3OH, are dissolved in 16.8g of water, H2O. What is the mole fraction of the solute.
A 486 mL sample of water was cooled from 50.0°C to 10.0°C. Assuming a specific heat of 4.184 J/K g and a density of 1.00 g/mL, find the amount of heat transferred from the water to the surroundings.
the slopes corresponding to standard Beer's Law plots were as follows: ?IA = 0.072 ?IB = 0.306 ?IIA = 0.760 ?IIB = 0.036 Using this data, calculate the ratio between the relative concentrations of MR- and HMR in this solution.
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