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Explain an electron in a hydrogen atom has undergone a transition from N = 6 to N = 4 energy levels. Find the energy of the photon that is emitted in electron volts.
1. 0.933 eV
2. 0.15 eV
3. 0.26 eV
4. 1.83 eV
5. 0.47 eV
Write a balanced chemical equation for the following reaction in a basic solution. ClO4-(aq) + Cu(s) ---> ClO3- (aq) + Cu(OH)2(s) 4 stars for whoever answers correctly
what is the molarity of a solution of silver perchlorate agclo4 if 3.2 moles of silver perchlorate is dissolved in 1.5
A bottle of wine consists of an 11 weight percent solution of ethanol (C2H5OH) in water. If the bottle of wine is chilled to -20oC, will the solution begin to freeze? Kfp for water is 01.86 oC?m-1
question you have a prepared buffer solution from benzoic acid and its conjugate sodium benzoate. ka 6.3 x 10-5 for
a premature infant is born. she weighs less than normal. her mother has been on a near starvation diet for the last month. the infant's blood glucose at birth and 5 hours later is very low. the problem may have been
Clearly explain, using calculations as necessary, how you would obtain the 5 mL of 1.5M sodium hydroxide that you need
at 25degc k 0.090 for the following reaction.h2og cl2og 2 hoclgcalculate the concentrations of all species at
This strontium isotope is radioactive, with a half-life of 28.1 yr. Calculate how long it will take for 0.890 g of the isotope to be reduced to 0.250 g by decay.
What is the pH of a 0.430 M ammonia solution. What is the percent ionization of ammonia at this concentration
consider the titration of 50.0 ml of 0.217 m hydrazoic acid hn3 ka 2.6 x 10-5 with 0.183 m naoh. calculate the ph of
The reaction 2A + B --> C + D has an activation energy of 80.0 kJ/mol. At 320°C, the rate constant k = 1.80 x 10-2 L mol-1 s-1. What would be the value of k at 450°C?
write a balanced equation for the decomposition reaction described using the smallest possible integer
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