General Chemistry Answers

1.    The vapor pressure of benzene is 100.0 mmHg at 26.1°C. Calculate the vapor pressure of a solution containing 24.6 g of camphor (C10H16O) dissolved in 98.5 g of benzene. (Camphor is a low-volatility solid.)

 A sample of tris(hyroxymethyl)aminomethane (H₂NC(CH₂OH)₃), which is a base, with a mass of 0.5492 g is dissolved in water and used to standardize a solution of hydrobromic acid. An endpoint is reached when 46.21 mL of hydrobromic acid has been added. Determine the molarity (in mol/L) of the hydrobromic acid solution. Report your answer to four significant figures. 

Determine pH: 33.9 mL of 5.88 x 10^-3 M HClO₄ is mixed with 207 mL of 2.17 x 10^-2 M SrO

100cm3 of M sulphuric avid is need to an excess of solid sodium hydrogen trioxocarbonate (IV)

Calculates

1- The mass of sodium tetraoxosulphuric (VI) produce

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Is hydrogen a cation or an anaion

Calculate the volume of 6M HCl solution needed to make 100 mL of 0.1M HCl

solution

2H2O(g) <> 2H2O (g)+ O2 (g)

Consider this reaction:

4 As _(s) + 3 O _{2 (g)} ->2 As ₂ O _{3 (s)}

When 50.0 g of As reacts with 50.0 g of O ₂ ,

a. Which one is the limiting reagent?

b. What mass of product/s is then actually formed?

c. What mass of reactant is left over?

Consider the reaction  PCl_3(g) + Cl_2(g)  ⇋   PCl_5(g)   K_c = 0.040 at 450^oC. If a reaction is initiated with 0.40 mole of Cl₂ and 0.40 mole of PCl₃ in a 2.0 liter container, what is the equilibrium concentration of PCl5 in the same system?