06/06/19
What is the name of this molecule?
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06/06/19
Use the following data to answer Mass of crucible=24.77g Mass crucible and tungsten=28.45g Mass crucible and tungsten oxide product=29.29g
A) Determine the empirical formula of the tungsten oxide productB)Determine the % tungsten in the tungsten oxide productC)Determine the % error given a literature value of 79.3% tungsten in the...
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06/06/19
Nicotine, a compound that contains carbon, hydrogen, and nirtogen is found to contain 74.02% carbon, 8.700% hyrdogen and 17.28% nitrogen
A) Determine the empirical formula of nicotineB)The molecular mass of nicotine is 161 emu. Determine the molecular formula.
06/04/19
How many mL of 0.100 M NaOH are needed to titrate 20.0 mL of 0.300 M HNO3
please help with this question
06/03/19
How many grams formed in following chemical reaction?
According to the following reaction, how many grams of barium chloride will be formed upon the complete reaction of 22.5 grams of barium hydroxide with excess hydrochloric acid?
06/02/19
Use Hess’ Law and equations 1, 2, and 3 to find ΔH for the formation of methane from chloroform CHCl3(l) + 3HCl(g) → CH4(g) + 3Cl2(g)
(1) ½H2(g) + ½Cl2(g) → HCl(g) ΔH° = -92.3 kJ (2) C(s) + 2H2(g) → CH4(g) ΔH° = -74.8 kJ (3) C(s) + ½H2(g) + 3/2 Cl2(g) → CHCl3(l) ΔH° = -134.5 kJ
06/02/19
Q. How many moles of LiOH are in 60.2 mL of 0.427 M LiOH?
What would be the set up/formulate this problem in order to solve it correctly?
06/02/19
Two quick Chemistry questions. Thanks !
Salicyclic acid + acetic anhydrade ---> acetyl salicyclic acid + acetic acid
In the above reaction, if 2.0 g of salicylic acid and 3.0 g of acetic anhydride were used. What is the limiting...
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06/02/19
Question looking for hydronium ion concentration?
The [H3O+] concentration of a solution of 1.93 mol/L benzoic acid in water is a.bcdef? mol/LGiven Ka for Benzoic acid = 6.3 × 10^–5
06/02/19
what is the two sig figs
How much pressure would a 50. N force exert on a 20. ft2 area?Report your answer with two significant figures.
05/30/19
Chemistry ideal gas law
A has sample with a mass of 0.250 g is collected at 150.0 °C and 720. mm Hg. The volume is 85.0 mL. What is the molar mass of the gas? Could you identify this gas simply using a periodic table? Why...
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05/29/19
Chemistry reaction
If 10.0 g of hydrogen and 75.0 g of oxygen are exploded together in a reaction tube, how much water is produced? What other gas is found in the reaction tube( besides water vapor) after the...
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05/29/19
Chemistry Question
A Container is filled with oxygen gas. The gas is at a temperature of 25.0 celcius, a pressure of 101.3 kpa and has a volume of 1.90 liters. What will happen to the temperature if the container is...
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05/29/19
Jon was expecting to make 112.3 grams of cobalt nitrate, but he only got 92.7 grams from his reaction. What was his percent yield?
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05/25/19
Stoichiometry problems
H2SO4 + 2NaOH -> Na2SO4 + 2H2Oa) what mass of H2SO4 would be required to react with 1.50 moles of NaHOb) if 60.0g of H2SO4 reacts with sodium hydroxide, what mass of water is produced
05/23/19
At STP, a flask contains 755 grams of ammonia. What is the volume of the flask?
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