General Chemistry Answers

an organic compound was analysis and found to contain 5.359 gram of carbon , 0.909 gram of hydrogen and three find the empirical and molecular formula if relative mass is 88

A 5.00 L of a gas is collected at 100. K and then allowed to

expand to 20.0 L. What must the new temperature be in order

to maintain the same pressure (as required by Charles' Law)?

if 0.75 grams of Ca(OH)2 is used in the reaction to determine the following:?

a. number of moles of HCl (MM= 36.46 g/mol) needed to completely react with Ca(OH)2. the molar mass of Ca(OH)2 is 74.10 g/mol.

b. mass of CaCl2 (MM= 110.98 g/mol) formed in the reaction

If it takes 50 mL of 0.5 M KOH solution to completely neutralize 125 mL of nitric acid solution (HNO3), what is the concentration of the nitric acid solution?

The density of ethanol is 0.789 g/ml at 20⁰C. Find the mass of a sample of ethanol that has a volume of 150.0 ml at this temperature

zinc+lead(II)nitrate yield zinc nitrate +lead

Bingo little found a bottle in his lab without a label. A note attached to the bottle said that the contents of the bottle was either an alcohol or an ether(no on knew which). Bingo decided to run a test to determine the compounds empirical formula. He found that when a 6.00g sample was burned in oxygen gas the only products were 13.2g of carbon dioxide and 7.2g of water. Find the empirical formula

Illustrate using a concept map the process on how to compute the molecular formula of a certain substance, given its percentage composition

49.85 grams of solid silver carbonate is dissolved in the calorimeter and the temperature goes from 23.15∘

C to 10.01∘

C g What is the ∆H for the solution process? The heat capacity of calorimeter and its contents is 311 

The Ksp for calcium hydroxide is 5.02 x 10-6 at 25°C. Calculate the concentrations

of calcium ions and hydroxide ions in a saturated aqueous solution of calcium

hydroxide.