2022 Copy of Copy of Chemistry Final Exam

when we graph data which variable goes on the x axis

• dependent
• independent

Which describes the octet rule?

• atoms want 10 electrons total
• atoms want 8 valence electrons
• atoms want 8 inner electrons
• atoms want 0 valence electrons

The element in the red column all have

• 2 valence electrons and a +2 charge when loosing electrons
• 1 valence electrons and a +1 charge when loosing electrons
• 7 valence electrons and a -1 charge when gaining electrons
• 8 valence electrons and 0 charge because they neither gain or loose electrons

Because Calcium is in the same family as Magnesium they will behave similarly because they have the same

• # of protons
• # of valence electrons
• # of neutrons
• This is false they have nothing in common

The element in the yellow column all have

• 2 valence electrons and a +2 charge when loosing electrons
• 1 valence electrons and a +1 charge when loosing electrons
• 7 valence electrons and a -1 charge when gaining electrons
• 8 valence electrons and 0 charge because they neither gain or loose electrons

Which group has the independent variable in it that you are testing?

• Control group
• Experimental group

What variables can affect how a gas behaves?

• Temperature
• Pressure
• Volume
• All 3 affect gases

What is the relationship in this graph

• as the temperature increases the solubility also increases
• as the temperature increases the time also increases
• as time increases the solubility also increases
• as time decreases the solubility decreases

How many moles are present in 5 grams of NaCl record your answer to 2 decimal places

This is identified as the reactant that determines the maximum amount of product that can be formed

• Excess reactant
• limiting reactant
• percent composition
• empirical formula