Chemistry Final Review

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Chemistry Final Review


Froggy Jumps Chemistry Final ReviewVersión en línea By mckenzie por mckenzie 1 What is the octet rule? a Atoms have 8 electrons in the valence shell b Atoms need 6 electrons in the valence shell c It doesn’t matter how many electrons 2 What is an ion a Electron b same as a cation c A atom or group of atoms with a positive or negative charge 3 what type of ions do metals form a Cations b Anions c Ionic bond 4 Ionic compounds have: a Brittle structure b High boiling point c Both are right 5 What’s Avogadro’s number a 5.022 x 10^23 b 6.022 x 10^23 c 6.022 x 10^26 6 What type of ions does magnesium form a 2+ cation b 2- anion c 1+ 7 True/False: Ionic compounds conduct electricity when soild a True b False c 8 What type of reaction is: 2K+Cl2 -> 2KCL a single replacement b combustion c Sythesis 9 What is the balanced formula for: aluminum + sulfur → aluminum sulfide? a 2S + 1Al -> Al4S5 b 2Al + 3S → Al₂S₃ c 1AL + S -> Al2S3 10 How many moles are in 23 g of NaCl? a 39.0 moles b 3.9 moles c 0.39 moles 11 Which state of matter has a definite shape and volume? a Solid b Liquid c Gas 12 Which state of matter takes the shape of its container but has a fixed volume? a Solid b Liquid c Gas 13 What happens to the particles in a solid when it melts into a liquid? a They move very fast and spread far apart. b They move slower and spread far apart. c They move faster and spread slightly apart. 14 Why do gases expand to fill their containers? a Because gas particles move freely and are far apart. b Because gas particles move fast and are far apart. c Because gas particles move slow and are close together 15 What happens to the pressure of a gas if you decrease the volume of the container? a Equal volumes of all gase (Avogadro Law) b The pressure increases (Boyle’s Law) c Energy cant be created or destroyed (Conservation of energy law) 16 What’s a chemical reaction? a Change in sate of matter b A process’s where new substances are formed c A mixture of two substances without change 17 What is the role of a solvent in a solution? a It is always a solid in a solution b It is the substance that gets dissolved c What is the role of a solvent in a solution? 18 In a saltwater solution, what is the solute? a Water b Salt c Both 19 Which of the following increases the rate at which a solute dissolves in a solvent? a Decreasing surface area b Lowering the temperature c Stirring the solution 20 What does Boyle’s Law describe? a The relationship between pressure and volume b The relationship between temperature and volume c The relationship between mass and temperature 21 According to Charles’s Law, when the temperature of a gas increases at constant pressure, its volume: a Decrease b Increase c Stays the same 22 Which of the following gas laws involves pressure, volume, and temperature together? a Avogadros number b Daltons Law c Combined gas law 23 A gas has a volume of 4.0 L at a pressure of 2.0 atm. What will the volume be if the pressure is increased to 4.0 atm, assuming temperature stays constant? a 8.0L b 2.0L c 1.0L 24 What is the difference between ionic and covalent bonds? a What is the difference between ionic and covalent bonds? b Ionic bonds transfer electrons; covalent bonds share them c There is no difference 25 What does a Lewis structure show? a Valence electrons and bonding between atoms b The atomic mass of each atom c Only the number of neutrons 26 What is electronegativity? a The number of electrons in an atom b The ability to lose protons c An atom’s ability to attract electrons in a bond 27 What is the molar mass of water (H₂O)?? a 18.02 g/mol b 28.00 g/mol c 10.00 g/mol 28 How many moles are in 36 grams of water (H₂O)? a 2.0 moles b 1.0 mole c 2.00 moles 29 What is the molar mass of CO₂? a 16.00 g/mol b 12.01 g/mol c 44.01 g/mol 30 What does the coefficient in a balanced chemical equation represent? a The number of moles of each substance involved b The number of grams c The number of atoms in a molecule 31 According to Boyle’s Law, what happens to the volume of a gas when pressure increases (at constant temperature)? a Volume increases b Volume decreases c Volume stays the same 32 What is the mathematical formula for Boyle’s Law? a P₁V₁ = P₂V₂ b V₁/T₁ = V₂/T₂ c PV = nRT 33 According to Charles’s Law, how does volume change with increasing temperature (at constant pressure)? a Volume decreases b Volume stays the same c Volume increases 34 What is the formula for Charles’s Law? a P₁/T₁ = P₂/T₂ b V₁/T₁ = V₂/T₂ c P₁V₁ = P₂V₂ 35 In the ideal gas law PV = nRT, what does "n" represent? a Number of liters b Number of atoms c Number of moles 36 Which conditions cause gases to deviate most from ideal behavior? a High pressure and low temperature b Low pressure and high temperature c Room temperature and pressure 37 What units are typically used for pressure in gas law calculations? a Joules b Atmospheres (atm) c Liters per second 38 How many valence electrons does a nitrogen (N) atom have? a 5 b 3 c 7 39 What are valence electrons? a Electrons in the nucleus b Electrons in the innermost shell c Electrons in the outermost energy level 40 How many valence electrons does oxygen (O) have? a 6 b 5 c 1

Chemistry Final Review

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Chemistry Final ReviewVersión en línea

por mckenzie

What is the octet rule?

What is an ion

what type of ions do metals form

Ionic compounds have:

What’s Avogadro’s number

What type of ions does magnesium form

True/False: Ionic compounds conduct electricity when soild

What type of reaction is: 2K+Cl2 -> 2KCL

What is the balanced formula for: aluminum + sulfur → aluminum sulfide?

How many moles are in 23 g of NaCl?

Which state of matter has a definite shape and volume?

Which state of matter takes the shape of its container but has a fixed volume?

What happens to the particles in a solid when it melts into a liquid?

Why do gases expand to fill their containers?

What happens to the pressure of a gas if you decrease the volume of the container?

What’s a chemical reaction?

What is the role of a solvent in a solution?

In a saltwater solution, what is the solute?

Which of the following increases the rate at which a solute dissolves in a solvent?

What does Boyle’s Law describe?

According to Charles’s Law, when the temperature of a gas increases at constant pressure, its volume:

Which of the following gas laws involves pressure, volume, and temperature together?

A gas has a volume of 4.0 L at a pressure of 2.0 atm. What will the volume be if the pressure is increased to 4.0 atm, assuming temperature stays constant?

What is the difference between ionic and covalent bonds?

What does a Lewis structure show?

What is electronegativity?

What is the molar mass of water (H₂O)??

How many moles are in 36 grams of water (H₂O)?

What is the molar mass of CO₂?

What does the coefficient in a balanced chemical equation represent?

According to Boyle’s Law, what happens to the volume of a gas when pressure increases (at constant temperature)?

What is the mathematical formula for Boyle’s Law?

According to Charles’s Law, how does volume change with increasing temperature (at constant pressure)?

What is the formula for Charles’s Law?

In the ideal gas law PV = nRT, what does "n" represent?

Which conditions cause gases to deviate most from ideal behavior?

What units are typically used for pressure in gas law calculations?

How many valence electrons does a nitrogen (N) atom have?

What are valence electrons?

How many valence electrons does oxygen (O) have?