General Chemistry Answers

1. Iron reacts with chlorine as follows:

2Fe(s)+ 3Cl2(g) → 2FeCl3(s)

(a) How many moles of iron react with 1.3 mol of chlorine?

prepare 1dm3 of potassium hydroxide solution of concentration 5.6dm-3. Outline how she would prepare this in the laboratory

Find the pH and the pOH of the solution. Show your work and use correct sig. figs.

1. A 0.023 M solution of hydrochloric acid

If you used 10 mL of each solution to make your reaction between Na2CO3 (aq) and Co (NO3)2 (aq), calculate the amount of precipitate, in grams. The concentrations are both 0.1 M.

2C5H11OH+O2 to give CO2 +H2O. How many moles of O2 are needed for combustion of 1 mole of alkanol

What mass of water will change its temperature by 30.0 °C when 800.0 Joules of heat is added to it?  The specific heat of water is 4.18 J/g°c

How much heat is needed to transform 59.9 grams of Ice at-75 C to steam at 100

A balloon has a volume of 13.7 L at 34.0 ºC. What would be the volume of the balloon at –12.0 ºC?

A solution contains 2P.5 g of cholecalciferol which is also known as Vitamin D3 (C27H44O) in 4500 mL of methanol (CH3OH). [ Here P is the last three digits of your Student ID) [Density of methanol at 25 C is 0.792 g/mL]

(a) Calculate the molarity of this solution

(b) Calculate the mole fraction of Vit D3 and methanol

(c) Is above mixture a dilute or concentrated solution? Explain your understanding within 60 words

C6 H12 O6 =C2H6O+CO2 if 938g of fructose was used in the preperation of wine,what is the percent yield if,after the fermentation 327g of ethanol was produced?