Anybody's Guess
In an endothermic reaction equation is the energy with the reactants or the products?
Reactants + energy= products or
reactants= products + energy
Reactants + energy= products
What substances are present after a chemical reaction takes place?
Products
2Na + Cl2-----> 2NaCl
What type of reaction is this
Synthesis
Bromine, Br, forms a binary compound with Aluminum, Al. What is the name of this compound?
Aluminum Bromide
What is a catalyst?
A substance that speeds up a reacion
Energy can be destroyed. True or false
False. Energy is conserved
tell me the generic formula for a synthesis reaction
A + B---> AB
What does the name chromium (II) indicate a compound contains
Chromium ions with a 2+ charge
Where is energy stored in a compound
Bonds
What is Avogadro's number?
6.02 x 1023 particles
What does the prefixs in the both words of Dinitrogen trioxide indicate?
a molecule of dinitrogen trioxide with 2 nitrogen atoms and 3 oxygen atoms
What happens to reactants in a chemical reaction to form new products
Bonds are broken in reactants and new bonds are formed in the products
2H2O + 572 kJ ----> 2H2 + O2
Does this represent an endothermic or exothermic reaction?
Endothermic
Magnesium, Mg, and chlorine, Cl, form a binary compound with a ration of 1:2 ratio of magnesium to chlorine. What is the ofrmuls for magnesium chloride?
MgCl2
What element is needed in order for combustion to occur?
What is Oxygen?
2H2O2---->2H2O + O2
What type of reaction is thisDecomposition
2K + 2H2O----> H2 + 2KOH
What type of reaction is this
Single replacement
2 Fe + 3 Cl2 ---> 2 FeCl3
If 2 moles of iron are used in this synthesis equation, how many moles of ferric chloride FeCl3 are formed?
2
The chemical formula for dichlorine heptoxide is Cl2O7. That shows that the compound contains seven ions ______ for every two________ ions.
oxygen, chlorine
Energy is measure in what unit
Joules, large amounts energy measured in kJ (kilojoules)
Pb(NO3)2 + 2Kl----> PbI2 + 2KNO3
What type of reaction is this?
Double replacement
2H2 + O2----> 2H2O
What type of reaction is this
Combustion
What is it called when electricity takes H2O and splits it into the gas H2 and O2
Water electrolysis
HBr and NaOH are added together. At the end of the reaction NaBr is dissolved in water to make a solution. What are the reactants?
HBr and NaOH
C3H8 + 5O2 -----> 3CO2 + 4H2O +2100kJ
Is this an exothermic or endothermic reaction
Exothermic