Chemistry

This category encompasses all questions about the composition, structure, properties, and reactions of matter.

Asked in Chemistry, Elements and Compounds, Percentages, Fractions, and Decimal Values

Percent composition is expressed as a percent by?

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Percent composition is usually expressed as a percent by mass, but in the case of gases and vapors, it is often expressed as a percent by volume.
Asked in Science, Chemistry

What are some non-renewable resources that can be found in your home?

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Unfortunately the majority of electricity across the world is made by burning fossil fuels, and these are non-renewable. Your lawnmower or car run on petrol, non-renewable. Coal for the fire.
Asked in Medication and Drugs, Chemistry

What happens when water mixes with alka-seltzer?

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When you mix Alka-Seltzer with water it will fizz for a minute then stop,Hope i answered you're question .
Asked in Chemistry

What is H6O3?

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It's H2O, but there is 3 molecules of it.
Asked in Chemistry

Can you drink boiled sea water?

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Yes. If you have a way to catch the evaporated water since the salt will stay in the water.
Asked in Chemistry, Atoms and Atomic Structure

How many moles of tungsten atoms are in 4.8 x 1025 atoms of tungsten?

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The answer is B, 8.0 x 10^1 There are 6.023 x 10^23 atoms in one mole, of any substance. So simply divide 4.8 x 10^25 by 6.023 x 10^23, to get about 79.69 which if you convert into scientific notation, is about 8.0 x 10^1 the answer for me was A but that's on novanet
Asked in Chemistry, Elements and Compounds

Where does reduction take place in an electrochemical cell?

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In an electrochemicall cell, reduction takes place in the cathode.
Asked in Chemistry, Medical Technologies, Technology

Importance of chemistry in medical technology?

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Chemistry is the building block/foundation of medical technology. The laboratory procedures and analysis should include higher knowledge in chemistry. To make it short, medical technology cannot function without chemistry.
Asked in Science, Chemistry, Periodic Table

What is the fourth element of the periodic table of elements?

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Beryllium (Be) See the Web Links and the Related Questions for more information.
Asked in Math and Arithmetic, Chemistry, Aspirin, Painkillers, Anti-Inflammatories, Elements and Compounds

A 134.50 g sample of aspirin is made up of 6.03 g of hydrogen 80.70 g of carbon and 47.77 g of oxygen What is the percent by mass of each element in aspirin?

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4.5 % hydrogen 60% carbon 35.5% oxygen to find say, the percentage of hydrogen, take the amount of hydrogen(6.03) and divide it by the total amount(134.50) with this new answer (.044832714) move the decimal over twice, and round to the highest tenths place. i hope this helps you.
Asked in Hospitals, Chemistry, Medical Technologies

What are the advantages of clinical thermometers?

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Clinical thermometers, also known as medical thermometers, are used for measuring human body temperature. They have kinks at one end which prevent the fluid from flowing back before the readings have been taken. They offer accurate and easy-to-read recordings, in addition they are easy to clean, to carry around and to store.
Asked in Chemistry, Atoms and Atomic Structure, Chemical Bonding

What is the Lewis structure for SiCl3Br?

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It is tetrahedral, so the Silicon atom is in the center with Bromine and the three Chlorine atoms bonded to it. Silicon has 4 electrons, Bromine has 7, and the three Chlorine together have 21, so altogether there are 32 electrons. This means that the Silicon atom in the center has a single bond to each of the outer atoms, and the bromine and chlorine atoms have 3 electron pairs each in addition to the bond with Silicon.