General Chemistry Answers

How many moles of NH,CI must be added to 1.5L of 0.2M solution of NH, to form a buffer whose P

is 9.00 ?(Kb = 1.8 × 105)

Percent Yield question:

Glucose into ethanol and carbon dioxide is given:

C6H12O6 -> C2H5OH + CO2

If 24g of ethanol (c2h5oh) was recovered from the conversion of 50g of glucose (c6h12o6)..

1.) What is the percent yield?

A quarter has a mass of 5.63g. What is its mass in kilograms? In

milligrams?

Calculate the total mass, in grams of precipitate produced when 10.0 ml of 2.50 M SrS (aq) reacts completely with ZnSO4 (aq).

what is the chemical reaction employed in albumin determination?

Estimate a retardation factor for the transport of dissolved chloroform (CHCl3) under the following conditions:

a. In the saturated zone, where n = 0.3, foc = 1%, and soil bulk density =2.1 g/cm3

f N₂O (laughing gas) and 5.40g water are obtained from heating 36.4g of NH₄NO₃, what is the mass percent yield water? Hint: work out the stoichiometry of the reaction first

A mixture of calcium chloride and magnesium chloride weighing 2.000g was mixed with sulfuric acid until no more calcium sulfate precipitated. The precipitate after drying and weighing had a mass of 0.736g.

a) Find the moles of calcium ion.

Find the mass, in grams, of 1.00×1023 molecule of N2

Determine the volume in liters occupied by 14 g of nitrogen gas at STP