Wednesday
September 17, 2014

Posts by mamta


Total # Posts: 7

holy school
H2 S + HNO3 --------> NO + H2 O + S 150 g of hydrogen sulfide are dissolved in 3500 mL of water. a. What is the molarity of the hydrogen sulfide solution? b. How many grams of sulfur can be produced from 50 mL of this solution? c. 22.4 L of nitrogen monoxide gas are ...
March 3, 2013

holy school
NaHCO3 + HCl ----> NaCl + CO2 + H2 O 150 g of sodium bicarbonate are added to 2 L of water. a. What is the molarity of the sodium bicarbonate solution? b. How many moles of hydrogen chloride would be needed to react with a 35 mL sample of the sodium bicarbonate solution? c...
March 3, 2013

holy school
CaCO3 + H2 SO4 ------> CaSO4 + CO2 + H2 O 200 g of calcium carbonate are added to 4 L of water. a. What is the molarity of the calcium carbonate solution? b. How many moles of hydrogen sulfate would be needed to react with a 25 mL sample of the calcium carbonate solution? c...
March 3, 2013

physics
Q- The distance from A to B is l. A plane flies at constant speed v relative to air along straight line from A to B & then from B to A. Calculate total time taken for his round trip, if a wind is flowing in three directions of wind velocity (u)- I)along the line ATO B II)...
July 6, 2011

math
a grocery store stocks 3 brands of yogurt.store sells two containers of brand A yogurt for every one container of brand B or brand C yogurt.if the store sells 100 containers of yogurt a day,how much of each brand of yogurt do they sell?
February 23, 2011

science
how do we determine the identification of an unknown substance using a thermochemical test ??? i mean the procedure
January 9, 2011

science
an experiment to test the effect of zinc tablets on plant growth
October 15, 2009

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