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Each substance on the left side of the arrow in a chemical equation is a _______________?
reactant
Who established that the total mass of the products is always equal to the total mass of the reactants?
Antoine Lavoisier
A molecule with a positive and a negative area is _________.
polar
Each substance to the right of the arrow in a chemical equation is a __________.
product
According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare with the mass of the reactants? (Why must they be balanced)
The masses are equal
Increasing the surface area of a solid _____.
has no effect on the speed of dissolving
Adding more solute to a solvent _______.
raises the boiling point
Balance the equation
____ P4 + ____ Br2 =>____ PBr3
1 P4 + 6 Br2 => 4 PBr3
In a solution, the substance that is being dissolved is the ________.
solute
A dilute solution has _______ of solute in the solvent.
small amount
What kind of reaction is a change in which one or more substances are converted into new substances?
Chemical Change
Numbers to the left of formulas for reactants are called _______.
coefficients
Water is sometimes referred to as the universal solvent because _________.
it is polar
A(n) ___________ is a mixture that has the same composition, color, and density throughout.
solution
In a soda pop, the solvent would be the _________.
water
A chemical reaction in which the energy released is primarily in the form of heat is ____________
exothermic
What will speed up the dissolving of a solid solute in water?
stirring the solution
If energy in the form of heat is required for a chemical reaction to take place, the reaction is ___________
endothermic
A(n) _______ chemical equation has the same number of atoms of each element on both sides of the equation
balanced
A solution that contains all the solute it can at a given temperature is called __________.
saturated
The solubility of a gas in a liquid occurs faster if the liquid is _______.
cooled
Which of the following types of solutes dissolves well in water? (like dissolves like)
polar molecules
An alloy is an example of a ________ solution
solid
The physical property where a solvent is able to dissolve a solute is __________.
solubility
According to the law of conservation of mass, if two atoms of hydrogen are used as a reactant, how many atoms of hydrogen must be part of the product?
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