Chemical Weapons Search Results

How To: Use & understand chemical equilibrium in chemistry

This is a video tutorial in the Education category where you are going to learn how to use and understand chemical equilibrium in Chemistry. This video answers a question about the contact process. This is a process by which sulphuric acid is made where they take sulphur, react it with oxygen to make sulphur dioxide and react it with more oxygen to make sulphur trioxide. The equation here is 2SO2 + O2 will give us 2SO3. This reaction is exothermic, that means it will give out energy in the fo...

How To: Make your own natural window cleaner

If you use Windex or any other window cleaning product, you may be exposing yourself, or others, to harmful chemicals. Many cleaning products that are sold in supermarkets, contain harmful chemicals that are not good and certainly not good for the environment.

How To: Find percent by mass & percent composition

In chemistry you come across problems which ask you to find the percent by mass and percent composition of each element in a chemical compound. To do this the first step is to compute the molar mass. Use the periodic table to look up the mass of individual atoms and multiply it by the number of atoms to find the mass of that element. Now add up all the masses to arrive at the molar mass of the compound. Now to find the percent composition of an element divide the total mass of each element by...

How To: Dispose of leftover lawn chemicals

In this video from nmsuaces we get a lesson in how to dispose of leftover lawn chemicals. Many gardeners want to know what to do with leftover materials and how to get rid of it safely. You should not store it. Once mixed up, use it all. Make your mix so you don't have to have a surplus that day. If you have a surplus, you need to spray it in an area that is labeled to be used. After you are finished rinse the container at least 3 rinses. The rinse water must then be sprayed out in the area w...

How To: Balance a chemical equation with ease

Learn how to balance the three different types of chemical equations in simple steps. First take an equation, write down its reactants and products and write down the names of all elements. Now write down how many of each element are present in the equation. Now check which element does not match, in this case the Oxygen doesn't match. Now multiply the element or compound starting at two but now hydrogen doesn't match. Try to match them by multiplying the coefficients but now sulfur doesn't m...

How To: Use gravimetric analysis to analyze sulfuric acid

This video is based on a chemistry experiment. This video is going to explain to us how to use gravimetric analysis in order to analyze sulfuric acid. This experiment should not be done for those who do not have a fundamental knowledge of chemical compounds, reactions and chemical safety. He explains first what he is about to do before he does it. Sulfuric acid is acidic and can be toxic if ingested or in contact with the eyes. Take extreme care with this experiment.

How To: Make Your Own Homemade Glow Sticks

Glow sticks, a popular favor at parties and outdoor events, and a must-have on Halloween, can be traced back to the United States Navy in the mid-1960s. The military desired improved visibility during night operations, and glow sticks, with their small-size portability and lack of batteries, were a perfect tactical solution.

Walkthrough Left 4 Dead 2: C5, The Parish - Bridge

This is the end of L4D2. Your last campaign. Your last chapter. See the best part: Campaign 5: The Parish - Bridge. Stock up on items and heal up. Climb the ladder and you should find some more medkits and weapons to take. Open the door and head outside. Use the radio on the ground to hear your situation explained to you. You will have to lower the drawbridge and get to the rescue chopper on the other end. If you complete the bridge sequence in under 3 minutes, you will unlock the "Bridge Ove...

Walkthrough Left 4 Dead 2: C5, The Parish - Waterfront

This last campaign is the hardest one. In the first part of campaign five, try not to drown and watch this L4D2 walkthrough for some tips on Campaign 5: The Parish - Waterfront. You are dropped off on the waterfront and told to make your way to the bridge. Pick up weapons and medpacks and head up the staircase. Go through the gate and clear a path to the Waterfront Market directly in front of you. There should be an open door for you to walk into. You may encounter a SWAT zombie at this point...

Walkthrough Left 4 Dead 2: C4, Hard Rain - Sugar Mill

Learn your way around the saccharine and bloody land of the sugar mill in L4D2. See the whole gameplay for Campaign 4: Hard Rain - Sugarmill. Stock up on weapons and head down the stairs to open the door of the safehouse. Clear out any zombies on the street and go across through the open window into the sugar mill. Once in the building, head to the left. There should be an open door leading back outside. For more info, watch the whole gameplay.

Walkthrough Assassin's Creed 2: Mission 58

Cheaters Never Prosper: But they do get quite a reputation. This is a simple mission. You need to just fight off the opponents that come at you using your bare hands. Even though you've no weapon equipped, you can still use the typical counter ability. Though you won't always KO an opponent with the first counter, repeatedly make use of the technique and you'll eventually drop the opponent.