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Do you have a question about how to do something? Looking for a handy guide? This Topic is for people to find "How To" guides to solve their problems, and for people who like to write guides and help others solve their more complex problems.

25,034 Questions

How to prepare Alzaj oil?

Alzaj oil is Sulphuric Acid

It was first discovered by the muslim chemist, Jaber bin Hayyan. He extracted it from green Zaj "iron (II) sulphate".

Sulphuric acid is hard to make at home!

The easiest way I can think of is to concentrate battery acid by evaporating the water. If you do this, be extremely cautious and do so at your own risk! Also make sure you are outdoors and use a glass container"

I'm sure that you could find other methods online that are probably safer and not as crude. Just look for sulphuric acid preparation.

Also I'm sure that it's commercially available

How to find acceleration without using force?

You can use the basic definition of acceleration, as a change of speed. In other words, measure the velocity at some moment, and at a later moment. Then divide the change of velocity by the time.

How to Derive newtons first law from second law?

The derivation is as follows:

Consider an isolated system of two bodies A and B. An isolated system is such that no force acts on the system.

This is the Newton's third law of motion for a body exerting some force on another.

Hope it is clear!

Best wishes!!

How to convert 7.5 kilo Newton to kilogram?

To convert kilonewtons to kilograms, you need to divide by the acceleration due to gravity. The acceleration due to gravity is typically taken as 9.81 m/s^2. So, to convert 7.5 kilonewtons to kilograms, you would divide 7.5 by 9.81 to get approximately 0.765 kg.

How to change 10 cubic into 10 inches?

we cannot convert cubic in inches because inch is unit of length and only cubic is unit of nothing.

If we use cubic with units of length e.g cubic meter, cubic feet etc, then it becomes unit of volume.

Even then we can not convert each because these are unit of two different quantities.( as we cannot change kg into meter)

How to identify hydrochloric acid?

Hydrochloric acid is a clear, colorless liquid with a strong, pungent odor. It is also highly corrosive and can cause burns upon contact with skin. You can identify hydrochloric acid by its distinctive smell and its ability to dissolve certain metals like zinc and magnesium.

How to isolate staphylococcus aureus from freshmeat?

You could run the meat through a blender, strain out the juice, filter that with something along the lines of a 2 um filter then plate 100 ul aliquots on mannitol salt agar plates, incubate at 37C for 24 hours.

If there is growth you have a Staphylococcus, if the media turns yellow you have a S. aureus.

(That's how I'd approach it without looking anything up specifically in a food microbiology reference.)

How to test oxygen?

What do you mean? To test for oxygen being produced, light a splint, blow it out then put it over the object you beleve is producing oxygen and if the splint re-lights oxygen is being produced.

How to find out your PIN for chemical bank ATM card?

You can check out the letters you received from the bank to try to find out the PIN number of the ATM card (And that is only if you haven't changed it already). If this doesn't help, call up customer care and identify yourself and then request for a new ATM PIN. They will send you a new PIN within the next few days.

How to convert ohm to degree Celsius?

It is not true that resistance has nothing to do with temperature. Electronic thermometers actually measure a resistance and convert it into a temperature. The temperature that the probe is measuring affects the particular metal (or metals, in the case of thermocouples) and the resistance of that metal varies accordingly. It's actually pretty simple chemistry. Anyone trying to do this conversion should be able to find a chart, specific to the type of probe.

Post related questions if you're having trouble with this last step.

(Replaced: You cant ! An ohm is a measurement of reistance - nothing to do with temperature !)

How to conserve biomass?

You can help save natural resources and conserve them by many different ways. One of them is to recycle. Another one is to turn off the water while brushing your teeth or putting soap on your hands. You can also plants trees, which will also save natural resources.

Natural resources can be conserved by the wise and judicious use of them without wasting them or replacing them whenever possible. They should be utilized without causing any ecological imbalance in nature.

How to cure uric acid for lifetime?

To whom it may concern: It's my pleasure to join this web coz i feel that my health needs will be properly answered. I am pretty sure that by joining here could be of great help to me and to my health as a whole.. I have uric acid and i want this be cured as early as possible. I am also experiencing a hard bowel movement. In this this connection, please provide me the necessary tips for the above mentioned. Thanks a lot and more power. Very truly yours, Mary

How to calculate equivalent weight of phosphorus pentoxide?

The equivalent weight of phosphorus pentoxide can be calculated by dividing its molecular weight by the number of equivalents of the component of interest it provides. Phosphorus pentoxide (P2O5) has a molecular weight of 141.94 g/mol and provides 2 equivalents of phosphorus (P). Therefore, the equivalent weight of phosphorus pentoxide is 70.97 g/mol.

HOW TO PASS THROUGH SOLIDS?

it is physically impossible to pass through a solid object

answ2. But heat may pas through a solid, as may sound waves.

HOW TO GO THROUGH OBJECTS SOLIDS?

To move through objects or solids, it is necessary to either use tools or equipment designed for penetration, such as a drill, saw, or cutter. It's important to ensure proper safety measures are taken to avoid injury or damage. Additionally, obtaining permission if the object is not yours is essential.

How to prepare 1m hcl from 35 percent hcl?

To prepare 1M HCl solution from 35% HCl solution, you would need to dilute the 35% HCl with water. Use the formula C1V1 = C2V2, where C1 is the initial concentration, V1 is the volume of the initial solution, C2 is the final concentration (1M), and V2 is the final volume (1 liter in this case). Calculate the volume of 35% HCl needed to achieve a 1M solution, then add water to make up the total volume to 1 liter.

How to clean a burette before fill it with hydrochloric acid?

To clean a burette before filling it with hydrochloric acid, rinse it thoroughly with distilled water to remove any impurities or residues. Follow this by rinsing with a small amount of the acid itself, disposing of it properly. Repeat this rinsing process until the burette is clean and ready for use.

How to make a time machine?

You really can't. Although if it were possible to travel 99.9 percent the speed of light, you can be suspended in time while the world around you changes. Try searching "time dilation" in google to further your inquiry.

How to prepare nitrate test solution using diphenylamine in sulphuric acid?

To prepare a nitrate test solution using diphenylamine in sulfuric acid, you can mix diphenylamine with concentrated sulfuric acid in a specific ratio. Typically, a 0.1% diphenylamine solution in concentrated sulfuric acid is used for nitrate testing. Follow safety precautions when working with concentrated sulfuric acid as it is corrosive.

How to make an egg drop project without a parachute or commercial packing materials that can survive a two story drop?

One method is to use a news paper and string, one string side on the egg and then a string to the center of paper then do the same thing for the other sides and you will have a shield. Another method is to use a long cardboard tube weighted at the bottom loosely packed with compressible material such as Easter egg basket grass, over cooked macaroni - it is important the pointed end of the egg face down and the top of the tube is finished with a compressible ball to absorb the drop to the side at the end of the fall.

How to Differentiation between Platinum and palladium ore?

Platinum ore typically has a silver-white color and is denser than palladium ore. A chemical test using aqua regia can help differentiate between the two ores, as platinum is more resistant to being dissolved by aqua regia compared to palladium. Additionally, the presence of other minerals in the ore can also help determine whether it is platinum or palladium.

How to calculate unit weight of the structural steel?

If it section is a rolled like beam,channel,square,angles&flat.

weight=Length x unit weight

unit weight of this section is=123kg/m^3

If it is plate or sheet

weight=Length x width x thickness x 7.85(sp.gravity of steel)

How to prepare phosphate buffer pH 5.8?

To prepare a phosphate buffer solution at pH 5.8, mix the appropriate amounts of monosodium phosphate (NaH2PO4) and disodium phosphate (Na2HPO4) in water. The exact ratio will depend on the desired buffer capacity. Adjust the pH by adding small amounts of acid or base as needed, and then confirm the pH using a pH meter.

How to balance Pb plus pbo2 plus h2so4 H2O plus pbso4?

To balance the chemical equation Pb + PbO2 + H2SO4 → H2O + PbSO4, start by balancing the Pb atoms on the left side by adding a coefficient of 2 in front of Pb on the left side. Then balance the SO4 atoms by adding a coefficient of 4 in front of H2SO4. The balanced equation is 2Pb + PbO2 + 4H2SO4 → 2H2O + 2PbSO4.

How to prepare 0.2N HCl solution?

0.2 N HCl solution means 0.2 equivalents of HCl dissolved in 1 litre of water.

Normality = Molarity x n-factor

=> Molarity =Normality/n-factor=0.2/1=0.2 M

0.2 moles should be present in 1 litre of solution.

0.2moles =0.2 x 36.5 = 7.3 grams of HCl

=>Dissolve 7.3 grams of HCl in 1 litre if water to get a 0.2N solution.