conservation of mass - SC9 Flashcards
1
Q
Explain the law of conservation of mass in a closed system (also known as the law of conservation of mass)
A
the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction
2
Q
Explain the law of conservation of mass in a non-enclosed system
A
If a gas escapes, the total mass will look as if it has decreased. If a gas is gained, the total mass will look as if it has increased. However, the total mass stays the same if the mass of the gas is included.
3
Q
how can mass of a reactant be deduced from the mass of the product?
A
product mass - any other additional masses in reactants = desired answer
4
Q
what unit is used for the concentration of a solution?
A
gdm-3
