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Mass, volume and density in International System of Units 0001
What are the units of mass and volume in SI? What will be the unit of density in SI?
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Density of a substance 0001
The volume of 200 g of a substance is 10 L, what is its density?
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Mass of reactants in a chemical equation 0001
How many grams of
are needed to react with 120 g of NO, in order to obtain
?
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Atomic number and atomic mass 0001
An element has atomic number 10 and atomic mass 20. How many neutrons does this element have?
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Question about nucleus of the atom 0001
The nucleus of an atom is composed of uncharged particles as well as of the following:
a) Electrons
b) Protons
c) Neutrons
d) Ions