TTU CHEM 1307 Exam I

Texas Tech University, Prof. Casadonte

H

1 Hydrogen

He

2 Helium

Li

3 Lithium

Be

4 Beryllium

B

5 Boron

C

6 Carbon

N

7 Nitrogen

O

8 Oxygen

F

9 Fluorine

Ne

10 Neon

Na

11 Sodium

Mg

12 Magnesium

Al

13 Aluminum

Si

14 Silicon

P

15 Phosphorous

S

16 Sulfur

Cl

17 Chlorine

Ar

18 Argon

K

19 Potassium

Ca

20 Calcium

Base Unit of Length

meter (m)

Base Unit of Mass

kilogram (kg)

Base Unit of Time

second (s)

Base Unit of Temperature

kelvin (K)

Base Unit of Moles

mole (mol)

Base Unit of Electric Current

ampere (A)

Base Unit of Luminous Intensity

candela (cd)

Deci-

10^-1

Centi-

10^-2

Milli-

10^-3

Micro-

10^-6

Nano-

10^-9

Pico-

10^-12

Femto-

10^-15

Atto-

10^-18

Deca-

10

Hecto

10²

Kilo-

10³

Mega-

10^6

Giga-

10^9

Tera-

10^12

What is the derived unit of energy?

joule (J)

What is the derived unit of force?

Newton (N)

What is the derived unit of power?

watt (W)

What is the derived unit of pressure?

pascal (Pa)

What is the derived unit of electric charge?

coulomb (C)

What is the derived unit of electric potential?

vol (V)

Force=______

ma

Acceleration=______

m/s²

Pressure=______

N/m²

Velocity=______

m/s

What is the pressure exerted by a column of dry air at sea level and 273K called?

14.7lbs/in²=101.325 kPa=______

1 atmosphere (atm)

Density=______

mass/volume

What is the freezing/boiling point of water in °F?

32/212

What is the freezing/boiling point of water in °C?

0/100

What is the freezing/boiling point of water in K?

273.15/373.15

What is the conversion from °C to °F?

F=9/5(C)=32

What term is defined by how close a measurement is to the correct value?

Accuracy

What term is defined by a measurement of how closely at least 2 measurements agree with each other or reproducibility?

Precision

Is volume a fundamental unit?

No

How many inches are in a foot?

12in

How many feet are in a yard?

3ft

How many centimeters are in a meter?

100

How many feet are in a mile?

5280ft

What is the speed of sound?

1000ft/sec

What law is defined by: matter can neither be created nor destroyed, although it can change forms into energy

Conservation of Matter

What law is defined by: in a chemical compound, the proportions by mass of the elements that compose it are fixed, regardless of how it was formed

Definite (Constant) Proportions

What law is defined by: two different compounds each containing the same elements will have mass ratios that are whole number multiples

Multiple Proportions

What law is defined by: the ratio of the volumes of any pair of gases in a gas phase chemical reaction (at the same temp and pressure) is the ratio of simple integers

Combining Volumes

What law is defined by: equal volumes of different gases at the same temp and pressure contain equal numbers of particles

Avogadro’s Hypothesis

What type of mixture has one or more visible boundaries between components?

Heterogeneous

What type of mixture has no visible boundaries between components (components are mixed as individual atoms or ions)?

Homogeneous

What kind of substance is represented by the image?

Pure substance

What kind of substance is represented by the image?

Heterogeneous

What kind of substance is represented by the image?

Homogeneous

What kind of substance is represented by the image?

Pure Compound

What did the Cathode Ray experiment determine?

Charge to mass ratio of electron

What is the Oil Drop experiment determine?

Charge and mass of electron

What did the Plum Pudding experiment determine?

Atom is mostly space and nucleus is dense

Atomic radius=______

100pm

Nucleus=______

0.005pm

1A=100pm=______

0.1nm

What is the number of protons in an atom of an element (neutral atom) called?

Atomic number

What is the total number of protons and neutrons in the nucleus of an atom called?

Mass number

An atom with the same atomic number but different mass number caused by differing numbers of neutrons is called an _______

Isotope

What is the notation in the image called?

Isotope notation

What is 1/12 of the mass of one carbon-12 atom called?

Atomic Mass Unit (amu)

The atomic mass of an element is measured as the ______ ______ of the occurring isotopes

weighted average

1 mole=______

6.02214×10^23

What is the mass of one mole of a substance called?

Molar mass

What are the starting materials in a chemical reaction called?

Reactants

What are the substances which are formed in a chemical reaction called?

Products

The amount of a reactant indicated by a balanced equation is called the ______

Stoichiometric amount

The reactant used up first in a chemical reaction is called the ______

Limiting Reactant

Non-limiting reactants are also known as ______

Excess Reactants

What is the amount of product from the balanced equation called (maximum possible yield)?

Theoretical yield

The ______ of a reaction is the quantity of product that can be obtained from the reaction

yield

What is the actual amount of product obtained in the reaction called?

Actual yield

What is the formula for Percent Yield?

(actual yield/theoretical yield)x100%

The smallest whole number ratio of moles in each substance is called the ______

Empirical formula