How long would it take to count 1 billion tiny objects
How long would it take to count 1 billion tiny, invisible objects from a bottle of these objects if you couldnt even see one with an optical microscope but knew that each one weighed 0.00000001 gram?
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The rate constant for a certain reaction is k= 5.40×10-3 . If the initial reactant concentration was 0.250 , what will the concentration be after 9.00 minutes?
Describe the difference between population standard deviation and sample standard deviation. Describe a scenario in which you would use each.Other than the calculation of statistics, how could an engineer use a spreadsheet application to increase
The water level in a graduated cylinder initially at 221 rises to 271 after a piece of lead is submerged. What is the mass in grams of the lead?
How much heat is required to completely vaporize 2.3g of ice starting at -50oC. (The specific heat of ice is 2.0J/g.oC; the specific heat of water is 4.184J/g.oC; t
Sodium azide (NaN3) is sometimes added to water to kill bacteria. Calculate the concentration of all species in a 0.010 M solution of NaN3. The Ka value for hydrazoic acid (HN3) is 1.9 * 10-5.
The voltage for registering a bit of 1 on Ethernet can be as low as 2.5 volts or event 1 volt.why is this so low when the capacity for transmitting electricity on the copper wire is so high.
An acetic acid/acetate buffer system would be the best choice for experiments at pH = 5.00. What mass of sodium acetate trihydrate (NaCH3CO2•3H2O) and what volume of 6.00 M acetic acid stock solution should be used to prepare 1.50 L of a pH =
Organic reactions can be classified as substitutions, eliminations or additions and the reagents can be classified as electrophiles, nucleophiles or radicals.
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