General Chemistry Answers

A solution of 20.91 % by weight H2SO4 has a specific gravity of 1.150. What is the normality of

this solution? Water is added to dilute this solution to a solution of 3.03% by weight H2SO4

(SG= 1.020). What is the new normality of the resulting solution and how were they mixed?

(Assume 100 mL of the original solution was used.)

The mass percent of water in a hydrate of MnCl2 is 36.41%. What is the

formula of the hydrate?

A 2.815 g sample of CuSO4•XH2O was heated until all of the water was

removed. Calculate the percentage of water of hydration and the formula

of the hydrate if the residue after heating weighed 2.485 g.

Etilen glikol (EG, CH₂OH)₂, merupakan senyawa organik non-volatil yang banyak digunakan sebagai cairan anti-beku pada mesin otomatif untuk menyerap panas yang dihasilkan mesin. Dalam suatu cairan anti-beku diasumsikan hanya terdapat EG sebanyak 35 % (w/w) dalam air. Tekanan uap air murni pada suhu 20 °C adalah 17.5 Torr, massa molar EG = 62.1 g/mol, massa molar air = 18 g/mol.

Fe2O2+2AI->2Fe3+AI2O2

What mass of solid Lanthanum (III) oxalate nonahydrate { La2 ( C2O4 )3 ∙ 9 H2O } can be obtained from 650 mL of 0.0170 M aqueous solution of LaCl3 by adding a stoichiometric amount of sodium oxalate ?

If a plant makes 500g of glucose, how many grams of carbon dioxide did it take in? First, describe the steps you would take.

A student determines the chromium(II) content of a solution by first precipitating it as chromium(II) hydroxide, and then decomposing the hydroxide to chromium(II) oxide by heatingHow grams of chromium()oxide should the student obtain if her solution contains 55.0 of 0.569 M chromium(II) nitrate?

Butane, one of the main components of natural gas, is used for heating and cooking. The combustion process is

C₄H₁₀ + 13O₂    ------>   8CO₂ + 5H₂O

If 20.0 moles of CH₄H₁₀ are reacted, what is the volume of CO₂ (in liters) produced at 22.0^oC and 0.985 atm 

Coal as fired contains 2.5% moisture. On a dry basis the coal analysis is C 80%, H 6%, O 8%, ash 6%. The flue gas analyzes CO2 14.0%, CO 0.4%, O2 5.6%, N2 80.0%. The air used has a dew point of 50°F. The barometer is 29.90 in. Hg. Calculate the dew point of the stack gas.