What Is: Chemistry

Units 1 & 2

1

What is this piece of equipment?

Buret

2

When would you use a test tube?

When you need to hold, mix, or heat chemicals during a lab.

3

What are the Alkali metals?

Li, Na, K, Rb, Cs, and Fr

4

Who discovered that electrons form an "electron cloud" around the nucleus in an atom?

Erwin Schrodinger

5

Zebranium consists of 2 isotopes, 90% Zebranium-1 and 10% Zebranium-3. Zebranium-1 has a mass of 56.31g. Zebranium-3 has a mass of 14.89g. What is the average atomic mass?

52.17g

Units 3 & 4

1

What is the range of visible light on the electromagnetic spectrum?

400nm to 700nm

2

Write the full electron configuration of potassium.

1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

3

What element has the highest electronegativity?

Fluorine

4

Is NaCl Polar Covalent, Non-Polar Covalent, or Ionic?

Ionic

5

What is the electronegativity difference between Na and Fe?

0.90

Units 5 & 6

1

What are the 7 diatomic elements?

Hydrogen, Oxygen, Nitrogen, Fluorine, Iodine, Chlorine, and Bromine

2

Balance this equation.

_NaOH+_As --> _Na₃AsO₃+_H₂

6 NaOH+ 2 As --> 2 Na₃AsO₃+ 3 H₂

3

What is the name of this compound, C₉H₁₈?

Cyclononane

4

What are the 5 types of reactions?

Synthesis, Decomposition, Single Replacement, Double Replacement, and Combustion

5

What is the mass of the reactants in this unbalanced chemical equation? Round the answer to 2 places behind the decimal.

Ca(OH)₂ + HCl --> CaCl₂ + H₂O

Ca(OH)₂ = 74.09

HCl = 36.46

Units 7 & 8

1

What is the most inclusive of the 3 acid laws?

Lewis

2

Identify the Acid and the Base in this chemical equation.

H₂SO₄ + 2NaOH --> Na₂SO₄ + H₂O

Acid=H₂SO₄

Base=NaOH

3

What is the dissociation equation of Magnesium Hydroxide?

Mg(OH)₂ --> Mg⁺² + 2 OH^-1

4

Do electrolyte solutions conduct electricity? Explain your answer.

Yes, they do conduct electricity.

5

What is the molarity of an Mg(SO₄)₂ solution prepared by diluting 25.0mL of a 2.31M Mg(SO₄)₂ solution to 270mL?

0.214M

Units 9, 10 & 11

1

A sample of oxygen has a pressure of 300 Torr and a temperature of 103 K. If the original temperature is 56.0 K, what is the original pressure in Torr? Round your answer to 1 place behind the decimal.

P₁ = 163.1

2

What gas law states that the volume is higher when the amount of moles is higher?

Avogadro's

3

What are the endothermic phase changes?

Sublimation, Vaporization, and Melting

4

What is the percent yield formula?

% Yield= (Experimental / Theoretical) x 100

5

What is the heat change of the reaction?

2 ZaWe + GrHm₂ --> 2 ZaHm + GrWe₂

Substance=ΔH_p^o(Kj/mol), ZaWe=30.40

GrHm₂=-21.60, ZaHm=104.3, GrWe₂=231.9

Heat Change = 401.3 KJ