Unit 1
What are the properties of nonmetals on the periodic table?
they form chemical compounds by making covalent and ionic bonds.
What is avogadro's number
6.023 × 1023
One way to determine the limiting reactent is to compare the mole ratio of the amount of reactants used
what are the 5 types of reactions
combination, decomposition, single-replacement, double-replacement, and combustion.
each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.
whats the difference between and physical and a chemical change?
physical: form changes
chemical: new substance is formed
3.59 mol of Fe2O3, how many grams of SO3 can we get
862.4gSO3
how many molecules are there in 4.00 moles of glucose (C6 H12 O6)
2.41*10^24
what are the 4 state symbols and what do they stand for
s: solid
l: liquid
g: gas
aq: dissolves in water
define electronegativity
the tendency of an atom to attract shared electrons to itself.
what is the Law of conservation of mass?
that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.
How many grams of CO2 are produced if 2.09 mol of HCl
46.0 g of CO2
How many moles in 28 grams of CO2
0.64 moles CO2
__Fe+__O2->__Fe2O3
what is needed to balance this equation?
4 Fe+3 O2 −−→ 2 Fe2O3
name the shape of this molecule.
PCl3
trigonal pyramid
what is the atomic mass of Oxygen
16
find the percent composition of copper (II) hydroxide
CU:65.1
O:32.8
H:2.1
If 29.8 grams of tin (IV) carbonate are actually formed when this reaction goes to completion, what is the percent yield?
85%
__C4H6O3+__H2O-->C2H4O2
1 C4H6O3 +1 H2O −−> 2 C2H4O2
What happens to electrons in covalent compounds?
they share the electrons.
state the difference between heterogeneous and homogeneous
a pure substance or a homogeneous mixture consists of a single phase. A heterogeneous mixture consists of two or more phases.
whats the difference between Empirical formula vs. molecular formula
Empirical formulas show the simplest whole-number ratio of atoms in a compound, molecular formulas show the number of each type of atom in a molecule.
How many grams of sodium chloride are required to make 0.32 moles of chlorine?
2 NaCl → 2 Na + Cl2
37g
It is used to determine the products of single displacement reactions, whereby metal A will replace another metal B in a solution if A is higher in the series.
when is a compound Ionic and when is it Covalent.
Ionic:When a metal is combined with one or more nonmetals, the compound is usually ionic.
Covalent:Covalent compounds are formed when two nonmetals react with each other.