Chem Test 3

Density

100

What is the equation to find Density?

D= Mass / Volume 

200

It is the density of a chunk of gold that weighs 23.5 grams and occupies a volume of 11 mL

What is 2.136 

300

It is the density of 450 g of zinc and 43.3 mL 

What is 10.3926 g/mL

400

If the Volume of Copper is 3024.0 g and the density is 2.347 g/mL what is the Volume?

 

what is 1288.453 

500

What is the volume of a silver metal that weighs 2500.0 g. The density of the silver is 10.5g/cm³

what is 238cm³

Balancing equations

100

 Fe+ Cl₂→ FeCl₃

2 Fe+3 Cl₂ → 2 FeCl₃

200

C2H₄ + O₂ → CO₂ + H₂O

1 C₂H₄ +3 O₂ → 2 CO₂ +2 H₂O

300

 C₇H₁₆ + O₂ → CO₂ + H₂O

1 C₇H₁₆ +11 O₂ → 7 CO₂ +8 H₂O

400

C₂H₄ + O₂ → CO₂ + H₂O

1 C₂H₄ +3 O₂ → 2 CO₂ +2 H₂O

500

HSiCl₃ + H₂O → H₁₀Si₁₀O₁₅ + HCl

10 HSiCl₃ +15 H₂O → 1 H₁₀Si₁₀O₁₅ +30 HCl

Lewis Dot and more bonding

100

What do we use to make lewis dot diagrams? 

Valence electrons 

200

It is the type of bond formed between Li and Cl.

3.0-1.0=2.0 ionic

300

It is the type of bond formed between C and O.

3.5-2.5=1.0 Polar covalent

400

Please draw the lewis dot diagram for Ne

all 8

500

Please draw a lewis dot diagram for Ca.

two dots

Element Behaviors

100

Electronegativity general increases as we move ... across the periodic table

Left to right. 

200

It is the fourth most abundant element occupying 78% of the earth's atmosphere.

Nitrogen 

300

It is the element that is used to propel rockets in what state? 

liquid oxygen

400

Plays a vital role in every physiological reaction in the body and is the most abundant element in the universe but not the body. it does make up 18% of the body though

what is Carbon?

500

This element makes up 65% of the human body and is considered the most abundant element within the body.

what is oxygen

Types of Bonds

100

It is the key feature of an Ionic bind

electrons are transfered 

200

This type of bond occurs when there is equal sharing (between the two atoms) of the electrons in the bond. Molecules such as Cl2, H2 and F2 are the usual examples.

Nonpolar Covalent

300

It is the information that the type of bond it gives us? 

the strength of the bond, the future behaviors 

400

It is the key feature of a Covalent bond 

electrons are shared

500

It is the type of bond formed from having a change in electronegativity greater than 2.0

1. If the electronegativity difference (usually called ΔEN) is less than 0.5, then the bond is nonpolar covalent.
2. If the ΔEN is between 0.5 and 1.6, the bond is considered polar covalent
3. If the ΔEN is greater than 2.0, then the bond is ionic.