Chemistry
Chemistry, 25.12.2019 07:31, bluella

Enrico fermi (1901-1954) was a famous physicist who liked to pose what are now known as fermi problems in which several assumptions are made in order to make a seemingly impossible estimate. probably the most famous example is the estimate of the number of piano tuners in chicago using the approximate population of the city and assumptions about how many households have pianos, how often pianos need tuning, and how many hours a given tuner works in a year. another famous example of a fermi problem is \"caeser\'s last breath\" which estimates that you, right now, are breathing some of the molecules exhaled by julius caesar just before he died. assumptions: 1. the gas molecules from caesar\'s last breath are now evenly dispersed in the atmosphere. 2. the atmosphere is 50 km thick, has an average temperature of 15 �c, and an average pressure of 0.20 atm. 3. the radius of the earth is about 6400 km. 4. the volume of a single human breath is roughly 500 ml.

answer
Answers: 1

Other questions on the subject: Chemistry

image
Chemistry, 22.06.2019 02:20, dgadam7495
Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .
Answers: 1
image
Chemistry, 22.06.2019 07:00, misspicafunpoke
Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane
Answers: 2
image
Chemistry, 22.06.2019 08:00, kleathers97
Nconcentration refers to the molar concentration of an ion in solution. it may be identical to, or greater or less than, the molar concentration of the compound containing the ion that was used to make the solution. for soluble salts, the molarity of a particular ion is equal to the molarity of that compound times the subscript for that ion. for example, 1 m of alcl3 is 1 m in al3+ and 3 m in cl−. 1 m of (nh4)2so4 is 2 m in nh4+ and 1 m in so42−. part a what is the concentration of k+ in 0.15 m of k2s? view available hint(s) nothing m m part b if cacl2 is dissolved in water, what can be said about the concentration of the ca2+ ion? view available hint(s) if is dissolved in water, what can be said about the concentration of the ion? it has the same concentration as the cl− ion. its concentration is half that of the cl− ion. its concentration is twice that of the cl− ion. its concentration is one-third that of the cl− ion. part c a scientist wants to make a solution of tribasic sodium phosphate, na3po4, for a laboratory experiment. how many grams of na3po4 will be needed to produce 550 ml of a solution that has a concentration of na+ ions of 0.700 m ? express your answer numerically in grams. view available hint(s) mass of na3po4 n a 3 p o 4 = nothing g provide feedback
Answers: 3
image
Chemistry, 22.06.2019 09:30, psychocatgirl1
Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone, due to its high light availability and warm water temperature
Answers: 3
Do you know the correct answer?
Enrico fermi (1901-1954) was a famous physicist who liked to pose what are now known as fermi proble...

Questions in other subjects:

Konu
Social Studies, 06.11.2020 22:00