Chemistry Ch. 3 & 4

A patient has a temp of 38.5 C. What is the temp in degrees F? 70.5 F 311 F 126.9 F 101.3 F 11.7 F

101.3 F

how many protons is in an isotope of sodium with a mass number of 25

11

3.25 kcal is the same amount of energy as 3.25 J 0.777 J 777 13600 J 13.6

13600 J

Consider an isotope of sodium with a mass number of 25. The number of neutrons in this isotope of sodium is

14

A layer of copper on a pan has a mass of 135 g. How much heat, in kilojoules will raise the temp of copper from 26 C to 328 C if the specific heat of copper is 0.385 J/g C?

15.7 kJ

650. J is the same amount as 155 cal 2720 cal 650. cal 1550 cal 2.72 cal

155 cal

What is the electron arrangement for aluminum?

2,8,3

What is the electron arrangement for potassium (atomic number 19)?

2,8,8,1

If the temp is -55 F what is the corresponding temp on the Kelvin scale? 225 K 218 K 55 K 273 K 328 K

225 K

A serving of fish contains 50 g protein and 4 g of fat. If protein has a caloric value of 4 kcal/g and fat has 9 kcal/g, how many are in the serving? 2 significant figures 240 kcal 54kcal 470 kcal 220 kcal 490 kcal

240 kcal

One cup of kidney beans contains 15 g of protein, 1 g of fat, and 42 g of carbs. How many kilocalories, to two significant figures, does this sample contain? 60. kcal 88 kcal 230 kcal 240 kcal 520 kcal

240 kcal

How many valence electrons are in the electrons dot symbols for the elements in group 3A (13)

3

The number of electrons in the outer energy level of a neutral atom of boron (atomic number 5) is

3

consider a neutral atom with 30 protons and 34 neutrons. The number of electrons in this atom is

30

On a hot day, the thermometer read 95 F. What is the temp in C? 77 C 113 C 35 C 63 C 178 C

35 C

A cheeseburger from a fast food restaurant contains 19 g of fat, 20 g of carbs, and 28 g of protein. How many kcal of energy does the cheeseburger contain? 70 kcal 360 kcal 17 kcal 630 kcal 280 kcal

360 kcal

A temp of 41 degrees F is the same as 5 C 310 C -9 C 16 C 42 C

5

The correct numbers of protons, neutrons, and electrons in a neutral atom of 118/50 Sn

50 protons, 68 neutrons, 50 electrons

Consider a neutral atom with 30 protons and 34 neutrons. The mass number for

64

If the temp is 20 degrees C, what is the corresponding temp on Fahrenheit scale? -22 F 68 F 43 F 239 F 94 F

68 F

The temp of liquid nitrogen is -196 C. What is the corresponding reading on the Kelvin scale? 77 K -127 K -91 K 48 K 146 K

77 K

A potato contains 20g of carbohydrate. If carbohydrate has a caloric value of 4 kcal/g, how many are obtained from the carbohydrate in the potato? 5 kcal 20 kcal 40 kcal 60 kcal 80 kcal

80 kcal

Which element would have physical and chemical properties similar to chlorine?

Br

A compound only contains one type of atom

False

A liquid has its own volume and shape

False

Air is a heterogeneous mixture

False

Condensation occurs when a liquid is converted to a solid

False

Ice melting is a chemical change

False

The heat of fusion is greater that the heat of vaporization

False

iron

Fe

Air is an example of

a homogenous mixture

Coins in a piggy bank are an example of a compound heterogeneous mixture element homogeneous mixture none

heterogeneous mixture

Which of the following is a homogenous mixture noodle soup water sugar tea carbon

tea

silver

Ag

aluminum

Al

gold

Au

mercury

Hg

potassium

K

sodium

Na

Which of the following is a property of a solid? A) It takes the shape of the container B) It fills the volume of the container C) The particles move at a rapid rate D) The interactions between its particles are very week E) The particles have fixed positions and are very close together

The particles have fixed positions and are very close together

The number of dots in the electron dot symbol of carbon is

four

As a solid melts, its temp does not change

True

As a solid melts, temp does not change

True

Water vapor is a gas

True

When a liquid is boiling, its temp does not change

True

When a liquid is boiling, the temp does not change

True

iron rusting is a chemical change

True

in an atom, the nucleus contains

all the protons and neutrons

The elements lithium, sodium, and potassium

are in the same group

The elements sodium, magnesium, and silicon

are in the same period of elements

Which of the following elements is a noble gas? oxygen chlorine bromine argon nitrogen

argon

The smallest particle of an element that retains the characteristics of the element

atom

Iron rusting is an example of

chemical change

Helium is a (an) compound heterogeneous mixture element homogeneous mixture electron

compound

The solid state of matter has a

constant shape and volume

Which of the following is a physical property of both liquids and gases? a. has its own shape b. has a definite volume c. has strong interactions between its particles d. has randomly arranged particles e. has large spaces between molecules

d. has randomly arranged particles

The ionization energy of atoms

decreases going down within a group

Gold in a ring is a compound heterogenous mixture element homogenous mixture none

element

The primary substances of which all other things are composed are

elements

The phrase "ability to do work" is a definition of specific heat energy calorie heating cooling

energy

The formation of a gas resulting from the escape of high-energy particles from the surface of a liquid is known as

evaporation

When a liquid boils, the process by which the molecules leave its surface is called

evaporation

One gram of fat has less energy than one gram of protein

false

Water freezes at 100 C

false

Valence electrons are electrons located

in the outermost energy level of an atom

The atomic size of atoms

increases going down within a group and decreases going across a period

The number of valence electrons found in an atom of a Group A element is equal to

it's group number

The energy of motion is referred to as work freezing specific heat potential energy kinetic energy

kinetic energy

Which of the following elements is a nonmetal? nitrogen sodium iron silver calcium

nitrogen

Which of the following is a heterogeneous mixture? noodle soup water sugar tea carbon

noodle soup

Which of the following properties describes a liquid?

particles are close together and move randomly

The change of state from solid to gas is termed

sumblimation

Liquid water changing to ice is an example of a

physical change

The energy stored in chemical bonds is specific heat kinetic energy potential energy work a calorie

potential energy

An example of kinetic energy is a coiled spring running water a tree natural gas chemical energy

running water

What element has the electron arrangement 2,8,4?

silicon

The physical state(s) present when a substance is melting is (are)

solid & liquid

In which of the following would the particles move most rapidly? ice at -20 degrees C water at 20 degrees C steam at 110 degrees C boiling water ice at 0 degrees C

steam at 110°C

Which of the following is a metal nitrogen fluorine argon strontium phophorus

strontium

When a solid is converted directly to a gas, the change of state is called

sublimation

Absolute zero is the freezing point of water using the Celsius scale the boiling point of liquid nitrogen the temperature on the kelvin scale the coldest temp possible the freezing point of liquid nitrogen

the coldest temp possible

Ionization energy is the energy an ion acquires from an electron the energy needed to remove the least tightly bound electron highest for metal in Group 1A(1) higher for potassium than for lithium none of the above

the energy needed to remove the least tightly bound electron

Isotopes are atoms of the same element that have

the same atomic number but different number's of neutrons

Which of the following is an element? tin water salt sugar iced tea

tin

As heat is removed from a solid, its temp decreases

true

Black coffee is a homogenous mixture

true

Carbs and proteins have the same caloric value per gram

true

The temp at which water melts and freezes is the same

true

In a gas, the distance between the particles is

very large relative to the size of the molecules

Which of the following is not an element? tin water gold silver carbon

water

Which of the following is an example of potential energy? chewing food water stored in a reservoir burning wood a fan blade turning riding an exercise bike

water stored in a reservoir