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We a lot specify distance in terms of time: Chicago is 3 hours away or Bloomington is an hour away. Explain what do we mean by that? Ligt takes 500 seconds to get to earth from the sun. Explain how far is the sun?
If 15.0 mL of 4.5 M NaoH are diluted with water to a volume of 500.0 mL, what is the molarity of the resulting solution? Please include explanation, balanced equation, and calculations.
A 25.5 mL aliquot of HCl (aq) of unknown concentration was titrated with 0.113 M NaOH (aq). It took 51.2 mL of the base to reach the endpoint of the titration. The concentration (M) of the acid was
the reaction: 2C2H6(g) + 7O2(g)-----> 4CO2(g) + 6H2O(g) is exothermic. predict under what conditions of temperature (low, high, all or none) the reaction is expected to be spontaneous
find the amount of caffeine in milligrams that are isolated per gram of tea leaves. each tea bag contains 2.3 grams of
how many grams of mercury (II) oxide are needed to create 28.9 grams of oxygen gas?
zinc metal is amphoteric and will react similarity to aluminum metal dissolving in aqueous strong base. write a
When a solution of hydrogen peroxide is put on a cut, it bubbles, producing water and oxygen gas. If someone puts 0.56 mL of 3.00% hydrogen peroxide solution on a cut, what is the volume in mL of oxygen produced
Diazomethane has the following composition by mass: 28.57% C, 4.80% H, and 66.64% N. The molar mass of diazomethane is 42.04 g/mol. Find the molecular formula of diazomethane and draw its Lewis structure.
A gas occupies a volume of 925mL at 30 degrees celcius and 1.2atm. What volume will it occupy at STP?
In making the 3,5-dinitrobenzoate ester derivative, what compounds could be present besides the ester? Indicate any step in the procedure that is intended to remove a possible impurity.
The heat of vaporization of water is 40.66 kJ/mol. Assuming sweat is 100% water, how much heat is removed from your body through the evaporation of 1.86 g of sweat
Complete and balance the following molecular equations, being careful to apply the solubility rules to the products.
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