Chemistry Answers

A ten-centimeter thick rectangular metal slab with dimensions one and a half feet by fifteen meters undergoes a three-point bend test. Compute for the flexural strength if the load at fracture is five and sixty-five hundredths kilonewtons.

how could you make a 7.8% aqueous solution of glucose using 5.0g of glucose?

Ø Calculate the entropy change, ΔS^O for the following reactions using tabulated standard entropy values and figure out if the resulting values obtained are consistent with the expected entropy change as predicted qualitatively.

a. thermal decomposition of NaNO₃

2 NaNO₃(s) ---> NaNO₂(s) + O₂(g)

S^O values at 25°C

NaNO₃(s) = 116.5 /mol-K

NaNO₂(s) = 103.8 J/mol-K

O₂(g) = 205 J/mol-K

Which of the following species is the least nucleophilic? Justify

(A) (CH3)3CO- (B) H2O (C) (CH3)3N (D) BF3 (E)CN?

 Which isomer undergoes SN1 reaction most rapidly? Justify.

(A) 1-bromo-1-butene (B) 2-bromo-1-butene

(C) 3-bromo-1-butene (D) 4-bromo-1-butene

What is the mass percentage of 125g of fructose dissolved in 375mL of water?

What is the boiling point and freezing point solution of LiCl?

calculate the grams of solute that must be dissolved in 360 g of water in the preparation of a 15.0% potassium sulfate solution.

the vapor pressure of H2O at 28 degrees Celsius is 28.3mmhg find the vapor pressure of a solution containing 100g of sugar c12H22011 in 500g of H20 at 28 degrees celcius.

A mixture of hydrogen gas and chlorine gas reaction in bright sunlight to give hydrogen chloride.50cm3 of hydrogen gas was mixed with 40 cm3 of chlorine gas in a glass tube.Water was allowed into the tube without any escape of gasses.hydrogen chloride is very soluble in water.It is dissolved leaving other gasses.What is the volume of hydrogen chloride gas formed? What is the composition of the gasses left in the glass container