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200.0 g of Ca(C2H3O2)2 was found in the chemistry laboratory.
Calculate
i. the molecular mass of 1 mole Ca(C2H3O2) 2.
ii. the number of moles of Ca(C2H3O2)2 that exists
iii. the number of Ca(C2H3O2)2 molecules present
iv. the volume at STP if Ca(C2H3O2)2 is converted to gas.
v. the molarity of a solution made by dissolving 200.0 g of
Ca(C2H3O2)2 in 200 ml of water
Calculate the number of atoms of He(g) that are needed to exert a pressure of 4.0 atm in a 15 mL container at a temperature of -23℃
Define a nucleophile and nucleophilicity. How is the nucleophilicity different from the basicity? Explain with the help of an example
Which of the following has the lowest vapor pressure at room temperature and 1 atm pressure?
CH3CH3
CH3OCH3
CH3CH2OH
CH3OH
CH4
What is the buffering region for octanic acid that has pKa = 4.89?
what volume (in mL) of 18.0M H2SO4 is needed to contain 2.45g H2SO4
- what are the possible products formed when 2-methylbutan-2-ol is heated with concentrated H2SO4. why two products are possible Explain.
the reaction of diatomic fluorine gas with compound X yields a single product, compound Y. The mass percent composition of the product, compound Y is 61.7%F2 and 38.3%Cl. What is the probable empirical formula for product Y?
. A 0.01 M HCl solution is diluted with water hundred times. 1. The pH of the solution increases by 2. 2. The pOH of the solution increases by 2. 3. The hydronium ion concentration of the solution decreases from10─2 M to10─4 M. 4. The hydroxide ion concentration of the solution does not change.
The pH of an acid solution is 3. It may be all of the following solutions except. A: 10─3 M HCl solution. B: 10─3 M CH3COOH solution. C: 10─3 M HNO3 solution. D: 10─3 M HBr solution. E: 5 x10─4 M H2SO4 solution.
