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Subcategories of science of matter and energy:
Total questions: 73521
How do you determine the shape of a molecule?Popularity: 51
What is the atomic number of oxygen?
Popularity: 51
How do you calculate the molecular weight of a compound?
Popularity: 50
How do you solve stoichiometry problems?
Popularity: 50
Do all explosions produce carbon dioxide?
Popularity: 50
Although Dalton's atomic theory was rejected at first he used his theory to do what that soon resulted in his theory being accepted by scientists?
Popularity: 49
What is the structural formula of periodic acid?
Popularity: 49
What is the atomic number of vanadium?
Popularity: 49
Who are some Filipino scientists?
Popularity: 48
Who are some famous foreign scientists and what are their contributions to the fields of science?
Popularity: 48
How is bio fuel prepared?
Popularity: 48
What is the freezing temperature of wine?
Popularity: 48
What is the freezing temperature of alcohol?
Popularity: 48
What is the charge and location and mass of a proton and a neutron and an electron in the atom?
Popularity: 48
Why is water a special substance in the metric system?
Popularity: 48
Where does arsenic come from?
Popularity: 47
What are the electron configurations of all the elements?
Popularity: 46
What is the atomic number of hydrogen?
Popularity: 46
What are the major groups of organic compounds?
Popularity: 45
What is the structure of hex-1-yn-4-one?
Popularity: 45
Which of the following contains a positive charge hydrogen-ions hydroxide-ions electrons or neutrons?
Popularity: 45
What is the density of water at different temperatures?
Popularity: 45
What are some examples of chemical and physical changes?
Popularity: 44
What is the temperature difference between a yellow flame and a blue flame?
Popularity: 43
Why do the alkali metals react more violently as you go down the column in the periodic table?
Popularity: 42
What is a neutron?
Popularity: 41
Do white candles burn faster then colored candles?
Popularity: 41
What is naptha?
Popularity: 40
Is it possible that Carbon carbon can form four multiple bonds like Carbon Carbon tripple bond C-C double bond etc?
Popularity: 40
How do you determine the oxidation number of an atom?
Popularity: 40
What is the annual capacity in ECU of the ASHTA Chemicals Ashtabula Ohio chlor-alkali plant?
Popularity: 40
What are the effects of chocolate melting?
Popularity: 39
How did Dmitri Mendeleev create the periodic table of elements?
Popularity: 39
Why do Mentos and Diet Coke explode?
Popularity: 39
Why should safety precautions be observed in the laboratory?
Popularity: 38
How do you find the pH of a weak acid solution?
Popularity: 38
How long have people been using solar energy?
Popularity: 38
How much does a gallon of lead weigh?
Popularity: 38
What are three aqueous bases and three aqueous acids ranked from the strongest to the weakest?
Popularity: 38
What is muriatic acid?
Popularity: 38
Will sulfuric acid or hydrochloric acid corrode steel?
Popularity: 37
What is the atomic weight of all the elements?
Popularity: 37
What is a bunsen burner and its parts and how is it used?
Popularity: 37
Is rubbing alcohol an ionic or molecular compound?
Popularity: 37
How does lithium serve as an ionization suppressant in flame photometry?
Popularity: 37
What is density?
Popularity: 37
What is the barometric pressure at different altitudes?
Popularity: 36
Lattice parameter of metal A and B are 2 and 4 what will be lattice parameter of alloy AB A20B and A50B?
Popularity: 36
Why is heptane a liquid at room temperature?
Popularity: 36
What do members of the same group or column in the periodic table all have in common?
Popularity: 36
Why are calcium carbonate and carbon dioxide and carbon monoxide considered inorganic compounds?
Popularity: 36
Does hot water freeze faster than cold water?
Popularity: 36
Can scientists hatch a dinosaur egg?
Popularity: 35
What are some examples of alloys?
Popularity: 35
What is fermentation?
Popularity: 35
What is an inorganic compound?
Popularity: 35
Which flame is best for laboratory procedures blue flame or yellow flame?
Popularity: 35
How does chemistry affect our daily lives?
Popularity: 35
How do you prepare a solution of a specific concentration by dissolving a solid in a liquid?
Popularity: 35
How do you solve freezing point depression problems?
Popularity: 35
What is a physical change?
Popularity: 35
What is natural gas?
Popularity: 35
What percent of abundance of tin is in the earth's crust?
Popularity: 35
What is the chemical formula of vinegar?
Popularity: 35
How did Antoine Lavoisier formulated the law of conservation of mass?
Popularity: 34
What are the seperate component formulas in petroleum and if these essential chemicals of petroleum were mixed would an alternative fuel result?
Popularity: 34
What is the periodic table?
Popularity: 34
What are the chemical and physical properties of plastic?
Popularity: 34
Where can you find some examples of chemistry experiments?
Popularity: 33
What is the difference between an inorganic compound and an organic compound?
Popularity: 33
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