Q.1.
Since gasses weigh nothing, when they are produced in a reaction they do not have to be accounted for.
Q.2.
The coefficient in 3His
Q.3.
A precipitate is a
Q.4.
If reaction starts withof reactants it should produce
Q.5.
In a reaction A + B ----> C, reactant A hasand product C has 9g. How many grams does reactant B should have?
Q.6.
What will weigh more when a chemical change is complete? The reactants before the chemical reaction, or the product after the reaction is complete?
Q.7.
A decomposition reaction has
Q.8.
Measure of the amount of matter
Q.9.
In a reaction A + B ----> AB, reactant A hasand product AB has 10g. How many grams does reactant B should have?
Q.10.
2NH4OH----------> 4H+ NO2 is a
Q.11.
O3 ---> O + O2
Q.12.
P4 + 3 O2 ---> 2 P2O3
Q.13.
Which are the reactants in the following reaction?2Mg + O2 ---> 2MgO
Q.14.
The number of atoms of N (nitrogen) in 3N2O5 is
Q.15.
Jamie weighs a glass of water and observes its weight to beounces. Jamie then adds 6 ice cubes to the glass of water. Each ice cube weighs one ounce. After all of the ice cubes have melted, what will be theapproximate weight of the glass of water?
Q.16.
For an object to remain at rest, which of the following must be true?
Q.17.
If you increase the force on an object, its acceleration?
Q.18.
2Li + O2 ------> Liis a
Q.19.
C4H+ 3O2 ---------> 4CO+ 3His a
Q.20.
The number in front of a compound or element is a