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Chemistry

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Benny Wuckert

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Cards in this guide (14)
What is solubiuty

Solubility is the property of a solid, liquid, or gaseous chemical substance called solute to dissolve in a solid, liquid, or gaseous solvent to form a homogeneous solution of the solute in the solvent.

What is the mass percent of NaCl when 6.5g of NaCl dissolves with 250g of water

This concentration of NaCl is 2,6 g NaCl/100 mL solution.

Why are clothes made out of a mixture of synthetic fibers and natural fibers more popular than those made purely out of synthetic fibers

Natural fibres are good to wear and comfortable. But their cost is high. Synthetic Fibres are cheap but sometimes uncomfortable. Manufacturers mix synthetic fibres with natural fibres so that cloth they make get the characteristics of both synthetic and natural fibres. They become comfortable to wear and cheap in price..................................................

What are the causes of radioactive decay

An unstable nucleus, which can be caused by:

  • excess of neutrons
  • shortage of neutrons
  • metastable excited state of nucleus
What is the simple formula for sucrose

Sucrose is an organic compound commonly known as table sugar, cane sugar or beet sugar. Its chemical formula is C12H22O11.

When uranium -238 decays to form thorium-234 the uranium nucleus emitts

Uranium 238 is aan alpha particles emitter: halflife 4,468.109 years, energy 4,270 MeV.

What does solubillity mean

Solubility indicates how completely a substance dissolves into another substance.

What is the process when plants change light energy into chemical energy

Photosynthesis is the process by which plants change light into chemical energy.

What is produced when hydrogen reacts with water

There is no reaction.

How to make nuclear bomb-

To make a nuclear bomb, you need the fissionable material such as a Plutonium239 isotope, an explosive to start the nuclear chain reaction, a detonator, and a pusher.

What describes esters

Esters are compounds that form when organic acids react with alcohols.

How can saturated and unsaturated hydrocarbons be differentiated on the basis of combustion

Saturated hydrocarbons sometimes burn with smoky flame upon combustion while unsaturated hydrocarbons always burn with non-smoky or blue flame. This is on account of the reason that for the same number of carbon atoms in their molecular formula, saturated hydrocarbons have more number of hydrogen atoms as compared to unsaturated hydrocarbons.

What polysaccharide is found in plant cells and cannot be digested by humans

Mostly it is the cellulose. It cannot be digested

If a radioactive sample has decayed until only one eighth of the original sample remains unchanged how many half-lives have elapsed

3

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