Vocabulary
The energy that is stored in all compounds and potentially released in chemical reactions (answer with the phrase what is in front of the answer.)
What is chemical energy
Matter cannot be created or destroyed describes which law
Law of conservation of matter
What does NaCl represent
Sodium Chloride or table salt
When balancing a chemical equation you count the atoms true or false?
True
A strong chemical bond that is formed when atoms share pairs of electrons
Covalent bond
The process by which one or more substances change to produce one or more different substances (answer with the phrase what is in front of the answer.)
What is a Chemical Reaction
A student mixed baking soda and vinegar to test the law of conservation of mass. The student measured the mass before and after combining the substances. Which statement would they include in their conclusion to show evidence of the law of conservation of mass?
A. The mass of the substance was equal before and after combining the baking soda and vinegar.
B. The mass of the substance after combining was less because gas was formed and has no mass.
C.The substance remained a solid, so it follows the law of conservation of mass.
D.Since a new substance was formed, it does not follow the law of conservation of mass.
A. The mass of the substance was equal before and after combining the baking soda and vinegar.
How many of each atom is in CH4
1 carbon, 4 hydrogen
When balancing a chemical equation do you draw what the atoms look like?
Yes
A shorthand notation that uses chemical symbols and numbers as subscripts to represent the type and number of atoms that are present in the smallest unit of the substance
Chemical Formula
To maintain at a constant overall total (answer with the phrase what is in front of the answer.)
What is Conserve
The mass of all reactants must equal the mass of all products? True or false
True
How many of each atom is in H2O
2 hydrogen, 1 oxygen
The number and type of atoms of reactants is equal to the number and type of atoms of products describes which of the following?
A. Law of conservation of energy
B. Balanced chemical equation
C. Equal mass equation
D. Unbalanced chemical equation
B. Balanced chemical equation
A substance that takes part in and undergoes change during a chemical reaction
Reactant
The mass of all reactants must equal the mass of all products. Matter is neither created nor destroyed. (answer with the phrase what is in front of the answer.)
Law of conservation of matter
The number and type of atoms of reactants is equal to the number and type of atoms of products describes which of the following?
A. Law of conservation of energy
B. Balanced chemical equation
C. Equal mass equation
D. Unbalanced chemical equation
B. Balanced chemical equation
How many of each type of atom are in the formula NH₃?
1 nitrogen, 3 hydrogen
Is this equation balanced H2 + O2 ---> H2O
No
this is the balanced version: 2H2 + O2 → 2H2O
A measure of how much matter is present in a substance
Mass
what is A number written below and to the right of a chemical symbol that shows the number of a specific type of atom present and what is a A number placed in front of a chemical symbol or formula that represents the number of molecules (answer with the phrase what is in front of the answer.)
What is a subscript and what is a coefficient
Matter can be created and destroyed true or false
false
How many of each type of atom are in 4NO₂?
4 nitrogen, 8 oxygen
What are the first three steps when balancing chemical equations ?
1. write out the equation
2. Draw out the molecules
3.write out all the elements in the equation
The smallest particle of an element that maintains the chemical identity of that element
Atom