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The process shown in the image can best be described as a

rapid chemical reaction where gas is released.

slow chemical reaction where light is being given off.

rapid chemical reaction where heat is suddenly released.

slow chemical reaction where the liquid changes color.

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Which statement can be placed in the blank cell to make the information in the table accurate?

are made of neutral particles

can be crystalline

are made of charged particles

can be amorphous

Which substance most likely has the strongest intermolecular forces?

benzene

acetic acid

chloroform

water

Which model is useful in showing the reactivity of potassium?

Neither model is able to show the reactivity of potassium.

Both models because each shows an electron in the outermost shell.

Model 2 because it shows an electron in the outermost ring.

Model 1 because it shows an electron in the 4s orbital.

In which region are most particles moving the fastest?

Which postulate of the kinetic-molecular theory best describes the event in the diagram?

The average kinetic energy of particles depends only on temperature.

All collisions between particles are perfectly elastic.

Most of the volume of a gas is empty space.

There is no force of attraction or repulsion between gas particles.

Based on the information that is given, which atom in the table has the highest mass?

Which diagram represents a gas that has been ionized?

diagram 1

diagram 2

diagram 3

diagram 4

Elements that have complete valence electron shells are mostly found in the

p block.

d block.

s block.

f block.

Which best describes a compound such as magnesium oxide?

a mixture of two common elements

a mixture of two uncommon substances

a pure substance that is made up of different elements

an impure substance that is made up of two elements

Which statement best compares the energy involved in melting with the energy involved in boiling for a given liquid?

Energy is removed from the particles in each change, but more energy is removed in melting than in boiling because the attractions are weaker.

Energy is removed from the particles in each change, but more energy is removed in boiling than in melting because the attractions are weaker.

Energy is added to the particles in each change, but melting requires more energy than boiling because the attractions must be completely overcome.

Energy is added to the particles in each change, but boiling requires more energy than melting because the attractions must be completely overcome.

A gas in a rigid container at 25 times degree C has a pressure of 0 point 9 6 atm. A change in temperature causes the pressure to increase to 1 point 2 5 atm. What is the new temperature of the gas? Use the fraction with numerator cap p sub 1 and denominator cap t sub 1 is equal to the fraction with numerator cap p sub 2 and denominator cap t sub 2

negative 44 point 2 times degree C

115 times degree C

32 point 6 times degree C

338 times degree C

Consider the word equation. calcium hydroxide plus hydrochloric acid rightarrow calcium chloride plus water Which is the corresponding formula equation?

CaCl sub 2 times l rightarrow Ca times s plus Cl sub 2 times g

Ca OH sub 2 s plus 2 HCl l rightarrow CaCl sub 2 times aq plus 2 cap h sub 2 cap o l

NaOH times aq plus 2 HCl aq rightarrow NaCl times aq plus 2 cap h sub 2 cap o l

CaO times s plus cap h sub 2 cap o l rightarrow Ca OH sub 2 aq

Which statement best explains why the atomic theory developed efficiently?

Scientists ignored all previous knowledge about atoms.

Scientists rarely repeated experiments to make sure the results were correct.

Scientists had used creativity and the scientific method in their investigations.

Scientists had used a philosophical viewpoint as a method of investigation.

Based on the activity series provided, which reactants will form products? cap f is greater than Cl comma Cl is greater than Br comma Br is greater than cap i

Cl sub 2 plus AlF sub 3 rightarrow

CuF sub 2 plus cap i sub 2 rightarrow

CuI sub 2 plus Br sub 2 rightarrow

Br sub 2 plus NaCl rightarrow

Which statement best describes a pair of elements that will form an ionic bond?

Li and cap o : Oxygen easily loses electrons, and lithium gains them.

Ca and Br : Calcium easily loses electrons, and bromine gains them.

cap p and Cl : Phosphorus easily loses electrons, and chlorine gains them.

cap c and cap h : Hydrogen easily loses electrons, and carbon gains them.

Consider the balanced equation. cap n sub 2 cap h sub 4 plus 2 cap h sub 2 cap o sub 2 ce bond right arrow cap n sub 2 plus 4 cap h sub 2 cap o What are the mole ratios of hydrazine open paren cap n sub 2 cap h sub 4 close paren to hydrogen peroxide open paren cap h sub 2 cap o sub 2 close paren and hydrazine to water?

ratio of 1 to 3 and ratio of 1 to 4

ratio of 1 to 3 and ratio of 3 to 5

ratio of 1 to 2 and ratio of 3 to 5

ratio of 1 to 2 and ratio of 1 to 4

The volume of a fixed amount of gas is doubled, and the absolute temperature is doubled. According to the ideal gas law, how has the pressure of the gas changed?

It has stayed the same.

It has increased to two times its original value.

It has decreased to one-half its original value.

It has increased to four times its original value.

Which statement is true about crystal lattice energy?

It is a measure of the strength of the bonds between ions.

It increases as the size of the ions increases.

It is the energy that ions absorb when they form a crystal.

It increases as the charge on the ions decreases.

Two students are given two different size blocks of the same substance and are instructed to determine the properties of the substance. Which statement describes a property that will be the same for both students?

length because it is an extensive property

volume because it is an intensive property

mass because it is an extensive property

boiling point because it is an intensive property

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