Chemical Equations/Reactions
T or F: When balancing equations, you may change subscripts as needed.
False
What type of reaction feels warm to the touch, endo or exothermic?
"Third wheel", a single element replaces an element in a compound.
Single replacement
Is elephant toothpaste exothermic or endothermic?
Exothermic
Identifies a solid state
s
Which is NOT an indicator that a chemical reaction has occurred?
bubbling, color change, odor, phase change
Phase change
What type of reaction feels cold to the touch, endo or exothermic?
Endothermic
One reactant breaks down into 2 or more products
decomposition
What type of reaction is Elephant's Toothpaste?
Combustion, synthesis, decomposition, single rep, double rep?
Decomposition
Identifies a liquid state
l
When balancing chemical equations, what is the number called placed before the substance to change the number of units?
Coefficient
All chemical reactions absorb and _________ energy.
release
More than one reactant combines to form one product.
synthesis
The role of the yeast.
A catalyst, break down the hydrogen peroxide faster.
Identifies a gaseous state
g
According to the law of conservation of mass, in a chemical reaction, how does the mass or the reactants compare to the mass of the products?
Equal/same
A cold pack is an example of an endo or exothermic reaction?
Endothermic
Double replacement
means Yields, separates reactants and products
arrow
Who is the man credited for the Law of Conservation of Mass?
Antione Laviosier
Energy in chemical reactions is utilized in 2 ways: Breaking bonds, and ____________ _________.
Making Bonds.
The products of a combustion reaction are always:
Carbon dioxide and water
The name of the enzyme in our blood and skin cells that breaks down hydrogen peroxide
catalase
identifies a solid dissolved in water
aq