General Chemistry Answers

Destruction of the ozone layer takes place when its component ozone (O3) is converted into oxygen gas (O2) as shown by the following chemical reaction O3 + O = 2O2

Although degradation of O3 happens naturally, there some man-made substances that cause this process to take place at a rate which is harmful to the environment . One such substance is chlorofluorocarbon or CFC. In the presence of ultraviolet (UV) radiation, a chlorine (Cl) atom from CFC reacts with O3 and converts it to O2 at a faster rate. This is shown by the 2 equations below

Cl + O3 = Cl + O2

ClO + O = Cl + O2

In this process, the chlorine atom acts as _______________________.

Diagram 1 shows the preparation of standard solution of potassium hydroxide, KOH by dissolving 5.6 g of potassium hydroxide in distilled water and making the volume up to 100 cm³.

What is the volume of the standard solution prepared above that should be used if a student wants to prepare 50 cm³ of 0.5 mol dm^-3 potassium hydroxide solution?

If 3.4 moles of sulfur dioxide reacts with excess oxygen gas, how many moles of sulfur trioxide will form?

Calculate the number of moles of ethane (C2H3) needed to produce 10.0g of water.

2 C2H6 + 7 O2 => 4 CO2 + 6 H20

How many grams of chlorine are required to react completely with 5.00 moles of sodium to produce sodium chloride? 2Na + Cl2 => 2NaCl

How many moles of ammonia are produced when 0.60 moles of nitrogen reacts with hydrogen? N2(g) + 3H2(g) => 2NH3(g)

How many moles of chlorine is needed to react with 5 moles of sodium (without any sodium left over)? 2 Na + Cl2 => 2 NaCl

Nitrogen gas reacts with hydrogen gas to produce ammonia (NH3) gas. How many liters of NH3 can be produced at 0.93 atm and 24°C from a 16.0-g sample of nitrogen gas and an excess of hydrogen gas?

N2(g) + 3H2(g) => 2NH3(g)

Dinitrogen oxide, N2O, which is used in dentistry, is an anesthetic also called laughing gas. What pressure, in atmospheres, of 0.350 mole of N2O at the 22°C in a 5.00-L container?

What are the AO's participated for MO of HCl?

2px and 2pz

2pz of Cl and 1s of H

2pz of both Cl and H

None above