Unit 3
How many protons neutrons and electrons are in:
79 Au Gold 196.967
Protons: 79
Neutrons: 118
Electrons: 79
1.43 mol Fe to grams
79.9g
What happens to entropy when a substnace goes from solid to gas
Entropy increased
Which formula represents an alkyne?
A) C2H6 B) C3H4 C) C4H8 D) C5H12
C3H4
What decay particle has the highest ppenetrating strength.
Gamma
What happens to electronegativity as atomic number goes up in Alkaline Earth Metals.
Electronegativity goes down.
You perform a chemical reaction and produce 12.6 g of aluminum. How many moles of Al did you make?
0.467 mol of Al
During which phase change does the entropy of a sample of H2O increase?
(1) H2O(g) → H2O(l)
(2) H2O(g) → H2O(s)
(3) H2O(l) → H2O(g)
(4) H2O(l) → H2O(s)
choice 3
What class does the following substance belong? 3-Methylbutanol
Alcohol
What particle has the least mass.
Beta particle
What happens to IE as you go across the Periodic Table from left to right.
IE increases
What is the mass of 2.5 moles of Al2(SO4)3?
855g
What dooes BARF stand for
Broken Absorbed Released Formed
What type of bonding is present in both organic and inorganic molecules?
Covalent Bonding
Alpha Particle
Iodine is 80% 127I, 17% 126I, and 3% 128I. Calculate the average atomic mass of Iodine.
126.86 AMU
Rusting of iron occurs according to the equation: 4Fe + 3O2 → 2Fe2O3
What is the mole ratio of iron to iron(III) oxide in this reaction?
2:1
When the pressure on a reaction of gases is increased, the
rate of the reaction will
What is the name for the reaction that produces ethanol and carbon dioxide?
Does 2 H + 2 H → 4 He + energy show Fission or Fusion
Fusion
The elements on the Periodic Table are arranged in order of increasing.
Atomic Number
Suppose you find 110.0 g of an unknown compound that is 18.8% Na, 29.0% Cl, and 52.2% O. Determine its chemical formula based on its percent composition.
NaClO4
Consider the following equation:
A(g) + B(g) -> C(g)
As the concentration of A increases, the frequency of collisions of A with B will:
Increase
Name three reactions in which water is a product.
condensation polymerization
esterification
combustion
What fraction of Au-198 will remain unchanged after 4 half-life periods
1/16