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WorksheetsBiology 2nd Semester Review
Total questions: 20
Worksheet time: 20mins
Which of the following is NOT a step in balancing equations ?
1. Counting the atoms on both sides of the equation
2. Evaluate the coefficients
3.Verify the atoms on the products side only
4. Re-write the new equation with coefficients
Which of the following is the correct definition of coefficient?
The number of atoms in a molecule
The number of molecules in a molecule
The number of atoms in present in a chemical equation
The number of molecules present in a chemical equation
A chemical equation is ...
A written description of the number of atoms in a rxn
A written description of the number of molecules in a rxn
A written description of chemical change in a rxn
A written description of a atomic change in rxn
Which side of the equation would be labeled the product side?
The left
The right
The arrow
Neither
Which of the following statements describes a REACTANT and where they are found in the chemical equation?
The chemicals that you begin with, found on the left side of the equation
The chemicals that end with, found on the left side of the equation
The chemicals that you begin with, found on the right side of the equation
The chemicals that you end with, found on the right side of the equation
Which of the following statements describes a PRODUCT and where they are found in a chemical rxn?
The chemical that were produced in the beginning of the reaction on the left side
The chemical that were produced in the end of the reaction on the left side
The chemical that were produced in the beginning of the reaction on the right side
The chemical that were produced in the end of the reaction on the right side
According to the Law of Conservation of Mass, what happens to the wood and oxygen when it is burned?
The wood disappears.
It stays the same chemically.
The atoms in the wood and oxygen rearrange and form smoke and ash.
Nothing.
The law of conservation of mass states that ________
the total mass of reactants is more than the total mass of products
the mass of a chemical reaction is not constant
the mass of a chemical reaction remains constant
the total mass of reactants is less than the total mass of products
MgCl2 --> Mg4+ Cl2
H2 + O2 -> H2O
_2_H2 + _1_O2 -> _2_H2O
Which organelle is the location where protein is made?
Ribosome
Nucleus
Cytoplasm
Nucleotide
