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Worksheets8.P.1.4
Total questions: 10
Worksheet time: 3hrs 30mins
How does a balanced chemical equation relate to the Law of Conservation of Mass?
During a chemical reaction, the total amount of matter stays the same
During a chemical reaction, its added 1 new substances
The amount of matter changes over time
The bigger the number the more amount of matter it has
Is this equation balanced or not?
H2O--->H2+O2
Yes
No
What does the Law of Conservation of Mass State?
Mass can be created
Older rocks at the bottom and new rocks at the top
The law of conservation of mass states that mass can be destroy and created
The law of conservation of mass states that in a chemical reaction mass can't be created nor destroyed
A teacher has 100 g of Reactant X and 150 g of Reactant Y for her class demonstration. After combining the two reactants, how much product should she have?
250g
50g
150g
100g
What is the small number called?
o9
Subscript
reactant
9
CO efficient
Which equation is balanced?
2Al + 6HCl --> 2AlCl3 + 3H2
2Al + 3HCl → 2AlCl + 3H
Al + 2HCl → AlCl + H
4Al + 2HCl → 2AlCl + H2
Which are conserved during a chemical reaction?
molecules and volume
atoms and molecules
mass and atoms
volume and mass
An experiment was conducted to test the law of conservation of mass. At the end of the experiment , only 82% of the mass of the initial reactants was present. The experiment was repeated three times with similar results. Which best explains why some of the group was lost?
The mass turned into a heavier chemical
The mass escaped as a gas.
The mass transformed into a liquid.
e mass remained part of the reactant
Balance the following equation.
4P + ______O2⟶2P2O5
6
2
5
3
The left side of an equation has the.
products
problem
reactants
regent
