Misc.
Define and give an example for both a physical change and a chemical change.
Physical change: Appearance or form changes but the kind of matter in the substance does not.
Chemical change: Formation of breaking of a chemical bond.
___ Li + ___ AlCl3 ---> ___ LiCl + ___ Al
3, 1, 3, 1
How many atoms are in 7.64 moles of Ba?
4.60 x 1024 atoms Ba
Use B2H6 + O2 ---> HBO2 + H2O for the following:
How many moles of H2O are produced from 19.2 g of B2H6?
1.39 mol H2O
True or false? Acid is a proton acceptor.
False!
If this is a chemical equation:
X ---> Y
What is the word for X and Y?
X is the reactant, Y is the product
___ Rb + ___ S8 ---> ___ Rb2S
16, 1, 8
How many moles of H2O are in 8.33 x 1018 molecules of H2O?
1.38 x 105 H2O
Use C3H8 + 5O2 ---> 3CO2 + 4H2O for the following:
How many moles of H2O are formed from 3.85 moles of propane (C3H8)?
15.4 mol H2O
What is the word for when something can act as an acid or a base?
What pH is considered neutral?
8
___ C + ___ SO2 ---> ___ CS2 + ___ CO
5, 2, 1, 4
How many molecules are in 3.72 moles of SO2?
2.24 x 1024 SO2
Use 2H2O2 ---> 2H2O + O2 for the following:
What mass of O2 is produced when 1.840 mol of H2O2 decomposes?
29.44 g O2
True or false? The higher the numbers on the pH scale, the more alkaline.
True!
Draw a Lewis Structure for: CH3NH2
guys i can't insert pictures. just bear with me. i'm sure we'll figure it out... together ❤️
___ FeS2 + ___ O2 ---> ___ Fe2O3 + ___ SO2
4, 11, 2, 8
How many grams is 8.92 x 1024 of Sn?
1.76 x 103 g Sn
Use 3Fe + 4H2O ---> 4H2 + Fe3O4 for the following:
If 625 g of Fe3O2 is produced in the reaction, how many moles of H2 are produced at the same time?
10.8 mol H2
What is the pH of stomach acid?
1-2
What does, "the outermost shell of electrons in an atom, responsible for bonding" describe?
___ C10H22 + ___ O2 ---> ___ CO2 + ___ H2O
2, 31, 20, 22
How many atoms are in 90.42 moles of Cu?
5.44 x 1025 atoms Cu
Use MnO2 + 4HCl ---> MnCl2 + 2H2O + Cl2 for the following:
Calculate the mass of MnO2 needed to produce 25.0 g of Cl2.
30.7 g MnO2
What is the difference of acidity between an acid that has a pH of 3 and one that has a pH of 6?
1000x