18 Questions
What is the Law of Definite Composition also known as?
Law of Multiple Proportions
How is mass defined in chemistry contexts?
Anything that occupies space
What does the Atomic Number of an element represent?
Number of protons in the nucleus
What does the term 'Mole' refer to in chemistry?
A quantity of a given substance with a fixed mass
How is 'Molar Mass' defined in relation to a substance?
The mass of one mole of a substance
What is a 'Compound' defined as in chemistry?
A substance composed of different elements chemically bonded together
What is the term for a substance with a fixed composition?
Pure substance
What is the term for a group of atoms that are chemically bonded together?
Molecule
What is the term for an electrically-charged particle obtained from an atom or chemically bonded group of atoms?
Ion
What is the ratio of the actual yield to the theoretical yield, multiplied by 100%?
Percentage yield
What is the sum of the atomic masses/weights of all the atoms in a molecule?
Molecular weight
What is the formula that uses atomic symbols with numerical subscripts to convey the relative proportions of atoms of the different elements in the substance?
Chemical formula
What is the general formula for an alkene?
R-C=C-R'
What is the name of the functional group R-COOH?
Carboxyl
What is the formula for methyl cyanide?
CH3-CN
What is the symbol of the element with atomic number 11?
Na
What is the formula for Bromoethane?
CH3-CH2Br
What is the name of the element with atomic number 30?
Zn
Test your knowledge on converting heterogeneous matter into homogeneous matter and compounds through physical and chemical means. Learn about molecules, ions, and chemical formulas.
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