chemical reactions
What is the reactant and where is it located in the equation?
What is the reactant is found in the original part of the equation found on the left side.
What is the force that holds atoms in a compounds together?
What is a chemical bond
Balance the following Equation:
_____KClO3 ---> KCl + ______O2
2KClO3 ---> 2KCl + 3O2
When trying to balance an equation what is the only thing you can change?
What is the product of the chemical equation and where is it located?
What is the product is the new substance found on the right side of the equation
If 18 grams of reactant "A" react with 13 grams of reactant "B", What is the total mass of these products?
What is 31 grams
Balance the following equation:
____C3H8 + _____O2 ---> ____CO2 + ____H2O
1C3H8 + 5O2 ---> 3CO2 + 4H2O
In a chemical formula if you don't see a subscript how many atoms can you assume it has?
what is 1
Identify the reactants and the products in the following: H2 + NaCl ---> H2Na + Cl + S
What is Reactants: H, Na, Cl Products: H, Na, Cl, S
Explain the difference between exothermic and endothermic reactions.
What is Exothermic release energy, usually as heat, while Endothermic absorb energy from their surroundings.
Balance the following equation:
____P + _____O2 --->_____P2O5
4P + 5O2 ---> 2P2O5
What is the third step of balancing a chemical equation?
The third step is to adjust the coefficient of each molecule to balance out equally.
What does the law of conservation of mass states?
what is the law of conservation of mass states that matter during a chemical change can neither be created nor destroyed.
What are the four indications of a chemical change?
what is color change, precipitate, a gas is formed, energy is released as heat or light.
Balance the following equation:
___NaBr + ____CaF2 ---> ____NaF + ____CaBr2
2NaBr + 1CaF2 ---> 2NaF + 1CaBr2
Why do we balance chemical equations?
What is to make sure the law of conservation of mass is true