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1) the parabola y=ax^2 + bx + c has its vertex at (2, 1) and passes through the point (0 ,0). find a, b and c. 2) x^2 + 10x - 17 = P( x - 2)^2 + Q(2x - 3) + R i have found P=1, Q=7 and R=2 Now how do i express x^2 + 10x - 17 in the form P( x - 2)^2 + Q(2x - 3) + R ??

1) what are the advantages of refluxing? 2) a compound consists of carbon, oxygen and hydrogen only. the percentage composition by mass of these elelments in the compund is: C ( 54.5%), H (9.2%), O ( 36.3%) a) Determind the empirical formula of the compound b) if the molecular weight...

thx for help~~ i got one more question to ask..... 1. Write equations for the reactions taking place when carbon dioxide is dissolve in aqueous sodium hydroxide solution.

Q1. arrange the following gas mixtures in order of their tendency for CO2(g) to dissolve in aqueous solution ( percentages given are mole %) 1) 90% Ar, 10% CO2 2) 80% Ar, 10% CO2, 10% NH3 3) 80% Ar, 10% CO2, 10% Cl2 Write equaions for any chemical reactions occurring in aqueous solution on...

Q1.Arrange the following aqueous systems in order of their ability to dissolve CO2. Assume that, prior to exposure to 10% CO2 in Ar, they have been allowed to equilibrate with air: 1) distilled water 2) 1 M HCl solution 3) 1 M sodium hydroxide solution Q2 Explain why we can dissolbe more...

Outline an experimental method for determing the acid content in aspirin ( acetylsalicylic acid) given that it is a monoprotic acid anyone can do this Q ??

it is desired to determine the concentration of hydrochloric acid in a brick-cleaning solution. samples(each25mL) of the acid solution are to be titrated with a standard sodium carbonatesolution. 1) describe how to prepare 500mLof 0.500 mol L solution of sodium carbonate from pure dosium...