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
