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Suppose that the microwave radiation has a wavelength of 12.4 cm. How many photons are required to heat 275 mL of coffee from 25.0 celsius to 62.0 Celsius? Assume that the coffee has the same density, 0.997 g/mL, and specific heat capacity, 4.184 \rm J/(g * K), as water over this temperature range.
Describe an example of the how the structure of DNA or the transfer of genetic information impacted someone's life.
If the pressure is increased to 120 bar, the melting temperature increases to 375.88 K. Calculate DeltaHo fusion and Delta So fusion for this substance
To determine the concentration of a 25.0 mL acetic acid solution (Ka for acetic acid is 1.8 x 10-5), 25.0 mL of 0.200 M NaOH solution is used to reach the endpoint of titration. Calculate the pH of the endpoint.
Phosphorus-32 has a half-life of 14.0 days. Starting with 2.00g of P^32, how many grams will remain after 70.0 days? Express your answer numerically in grams.
If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the structure that could be abbreviated as XY2Z2.
if 69.5 kj of heat is applied to a 1036 g block of metal the temperature of the metal increases by 11.4degc. calculate
The isomerization of cyclopropane to form propene is a first-order reaction. At 760 K, 85% of a sample of cyclopropane changes to propene in 79.0 min. Determine the rate constant for this reaction at 760 K
Briefly explain why hydrogen atoms in methane are all in equivalent positions? B. Briefly explain why there are no structural isomers of propane (c3h8)
A solution containing 3.50 of sodium carbonate is mixed with one containing 5.00 of silver nitrate. How many grams of sodium carbonate are present after reaction?
an ionic compound forms when calcium z 20 reacts withiodine z 53. if a sample of the compound contains 1.4x 1019
The specific heat of iron metal is 0.450 J/g-K. How many J of heat are necessary to raise the temperature of a 1.05-kg block of iron from 25.0 Celcius to 88.5 Celcius
If you predicted that no ionic compound would form from the reaction in part e, what minimum amount of AX(s) lattice energy might lead to compound formation
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