Intro. to Chemistry - Final
A slice of turkey bacon contains 1350 kJ of food energy. How much energy, in Calories, does this slice of bacon contain? Note: (1 kcal = 4.184 kJ) and (1 Cal = 1 kcal)
323 Calories
This element is a key ingredient used in industrial degreaser, non-stick surfaces (e.g. Teflon) and toothpaste. This element contains 19 electrons and 19 protons. What is this element?
Potassium, K
What is the correct chemical name of the air-pollutant, SO3
Sulfur Trioxide
A key element used in the production of gun powder is a yellow solid and it has 6 valence electrons and 16 protons. What is this element?
Sulfur, S
Which of the following is the correct combination of the polymers' (i) name and (ii) its acronym and (iii) recycling number. - (i) low density polyethylene, (ii) HDPE, (iii) [2] - (i) polyvinyl chloride, (ii) PVC, (iii) [3] - (i) polyethylene terepththalate, (ii) PVC, (iii) [4] - (i) high density polyethylene, (ii) LDPE, (iii) [4]
(i) polyvinyl chloride, (ii) PVC, (iii) [3]
How many moles of barium sulfate (x-ray contrast) must be added to 0.150 liters of water in order to make a 1.75 M solution of barium sulfate?
0.263 mol
The carcinogenic covalent chemical compound (CCl4; carbon tetrachloride) was used in industrial cleaning agents, refrigerants, fire extinguishers, and old lava lamps. Balance the carbon tetrachloride reaction shown below. ___CCl4 (g) ---> ___C (s) + ___Cl2 (g)
1, 1, 2
In the earth's atmosphere, nitrogen dioxide can react with water to form nitric acid as shown below. Balance this atmospheric synthesis of nitric acid? ___ H2O (g) + ___ NO2 (g) ---> ___ NO (g) + ___ HNO3 (aq)
1, 3, 1, 2
Termites possess enzymes that allow them to break down cellulose into glucose, C6H12O6, and metabolize the glucose into carbon dioxide and methane. Balance the second part of this chemical equation (shown below). ___C6H12O6 (aq) ---> ___CH4 (g) + ___CO2 (g)
1, 3, 3
Calculate the heat energy released, in calories (cal), by the combustion of 17.5 moles of hydrogen. 2 H2 (g) + O2 (g) --> 2 H2O (g) + 498 kJ Note: c = νλ E = hν (when c = 3.00 x 108 m/s) (when h = 6.626 x 10-34 J.s) 1 nm = 1 x 10-9 nm 1 calorie = 4.184 J, 1 Calorie = 4184 J, 1000 cal = 1 kcal 1 mole = 6.022 x 1023 1 amu = 1.66 x 10-24 g
1.04 x 10^6 cal
The average thickness of a $50 bill is 0.0001092 meter. Which of the following correctly represents this thickness measurement? - 10920 m - 1.092 x 10^4 m - 10.92 m - 1.092 x 10^-4 m
1.092 x 10^-4 m
Average human blood can contain approximately up to 115000 ppm sodium chloride. Convert this calue into parts per hundred (pph or %)?
1.15%
If one breath of air contains 1.0 x 10^16 molecules, and the concentration of ozone is 570 ppm. How many oxygen atoms from ozone are present in each breath?
1.71 x 10^13 oxygen atoms per breath
A slice of bacon contains 415 Calories of food energy. How many kJ of energy does this slice of bacon contain? Note: (1 kcal = 4.184 kJ) and (1 Cal = 1 kcal)
1.74 x 10^3 kJ
It was determined that a slice of chocolate oreo mudslide cheesecake from a famous restaurant contained 4,560,560 J of energy. How many Calories (food) does the slice of chocolate oreo mudslide cheesecake contain? Note: c = νλ E = hν (when c = 3.00 x 108 m/s) (when h = 6.626 x 10-34 J.s) 1 nm = 1 x 10-9 nm 1 calorie = 4.184 J, 1 Calorie = 4184 J, 1000 cal = 1 kcal 1 mole = 6.022 x 1023 1 amu = 1.66 x 10-24 g
1090 Calories
Strontium fluoride is a common anti-reflective coating found on glass lenses. Calculate the molar mass of strontium fluoride.
125.6 g/mol
An intravenous bag was found to contain 2059 micrograms (mcg) of sodium chloride dissolved in 1.50 L of water? What is the sodium chloride concentration (ppb) in the bag?
1370 ppb
With a half-life of 432 yyears, the radioactive Americium-241 (241/95 Am) isotope was a common component for home smoke detectors. How many neutrons does the 241 Am isotope possess?
146
Bananas contain a naturally radioactive due to the presence of potassium-40 (40^K). How many ___ protons, ___ neutrons and ___ electrons does the 40^K isotope have?
19, 21, 19
Sodium ascorbate, NaC6H7O6, is often added to bacon, to accelerate curing and stabilize the colour of the meat. What is the molecular weight (i.e. molar mass) of sodium ascorbate?
198 g/mol
Name the three functional groups in acetylsalicylic acid (aspirin) shown bellow:
1=benzene ring, 2=carboxylic acid, 3=ester
Guanine is a component found in DNA and it forms the nucleotide guanidine. What are the names of the functional groups labeled 1) and 2) in the picture shown below? 1.) O 2.) NH2
1=ketone, 2=amine
Which chemical reaction below is an example of a complete combustion reaction? - H2O (l) ---> H+ (aq) + OH- (aq) - 2 KClO3 (s) ---> 2 KCl (s) + 3 O2 (g) - 2 CH3OH (l) + 3 O2 (g) ---> 2 CO2 (g) + 4 H2O (g) - MgCl2 (s) + 3 O2 (g) ---> Mg(ClO3)2 (aq)
2 CH3OH (l) + 3 O2 (g) ---> 2 CO2 (g) + 4 H2O (g)
Which reaction shown below is an example of an oxidation reaction? - K+(aq) + 2e- --> K (s) - F2(g) + 2e- --> 2 F-(aq) - 2 Cl- (aq) --> Cl2 (g) + 2e- - Mg2+(aq) + 2e- --> 2 Mg (s)
2 Cl- (aq) --> Cl2 (g) + 2e-
Which chemical reaction below is an example of a decomposition reaction? - H+ (aq) + OH- (aq) ---> H2O (l) - 2 CH3OH (l) + 3 O2 (g) ---> 2 CO2 (g) + 4 H2O (g) - 2 NaClO3 (s) ---> 2 NaCl (s) + 3 O2 (g) - MgCl2 (s) + 3 O2 (g) ---> Mg(ClO3)2 (aq)
2 NaClO3 (s) ---> 2 NaCl (s) + 3 O2 (g)
Some airports in the world use back scatter x-ray scanners that require large amounts of energy. What is the energy, in Joules, of this x-ray radiation generated at a frequency of 3.20 x 1025 Hz? Note: c = νλ E = hν (when c = 3.00 x 108 m/s) (when h = 6.626 x 10-34 J.s) 1 nm = 1 x 10-9 nm 1 calorie = 4.184 J, 1 Calorie = 4184 J, 1000 cal = 1 kcal 1 mole = 6.022 x 1023 1 amu = 1.66 x 10-24 g
2.12 x 10^-8 J
A slice of cheesecake was found to contain 585,000 calories of food energy. How many kJ of energy does this slice of cheese cake contain? Note: c = νλ E = hν (when c = 3.00 x 108 m/s) (when h = 6.626 x 10-34 J.s) 1 nm = 1 x 10-9 nm 1 calorie = 4.184 J, 1 Calorie = 4184 J, 1000 cal = 1 kcal 1 mole = 6.022 x 1023 1 amu = 1.66 x 10-24 g
2.45 x 10^3 kJ
The Bluetooth 4.1 antenna for the Apple Airpods® broadcasts with a wavelength of 1.207 x 10-1 m. Calculate the frequency utilised by the Airpods®. c = νλ E = hν (when c = 3.00 x 108 m/s) (when h = 6.626 x 10-34 J.s) 1 nm = 1 x 10-9 m
2.485 x 10^9 (1/s)
The Gold Institute dictates that gold leaf thickness should be 0.02541 micrometer (or 0.02541 um). Which of the following correctly represents this number in scientific notation? - 2.541 x 10^-8 m - 2.541 x 10^-6 m - 0.2541 x 10^-5 m - 2.541 x 10^-5 m
2.541 x 10^-8 m
Patients with chronic obstructive pulmonary disease (COPD) should avoid short term exposure to air containing more than 20000 ppm of ozone. Which statement below is correct? - 20000 ppm is equal to 1 billion parts of ozone per 200 particles - 20000 ppm is equal to 20000 ozone molecules per 1 hundred particles - 20000 ppm is equal to 20000 ozone molecules per 1 million particles - 20000 ppm is equal to 20000 ozone molecules per 1 billion particles
20000 ppm is equal to 20000 ozone molecules per 1 million particles
How many molecules of CO2 are present in 0.5 moles of CO2? Note: c = νλ E = hν (when c = 3.00 x 108 m/s) (when h = 6.626 x 10-34 J.s) 1 nm = 1 x 10-9 nm 1 calorie = 4.184 J, 1 Calorie = 4184 J, 1000 cal = 1 kcal 1 mole = 6.022 x 1023 1 amu = 1.66 x 10-24 g
3 x 10^23 molecules of CO2
The complete combustion of ethanol in E10 gasoline with oxygen produces water and carbon dioxide. Balance the chemical equation shown below? ___O2 (g) + ___C2H6O (l) ---> ___H2O (l) + ___CO2 (g)
3, 1, 3, 2
Pure aluminum metal is very reactive. It can be used for construction and automotive parts because it forms a protective coating of aluminium oxide. Balance the following chemical reaction for the formation of this protective coating: ___O2 (g) + ___Al (s) ---> ___Al2O3 (s)
3, 4, 2
Ethanethiol smells like rotten eggs and is added to liquid petroleum gas (LPG) to help warn of gas leaks. Calculate the bond energy required to break the bonds ethanethiol (CH3CH2SH).
3055 kJ/mol
Calculate the volume of air in liters that you might inhale (and exhale) in an 8.0 hour working day. Assume that each breath has a volume of about 0.50 L, and that you are breathing 15 times a minute? - 1.067 L - 60 L - 1265 L - 3600 L
3600 L
One type of vitamin D has the chemical formula C28H44O. What is the molar mass of this Vitamin D?
397 g/mol
Which chemical reaction below is balanced? - S2 (s) + 2 O2 (g) ---> SO3 (g) - 4 Al (s) + 3 O2 (g) ---> 2 Al2O3 (s) - CH4 (g) + O2 (g) ---> CO2 (g) + 2 H2O (g) - 2 H2O2 (l) ---> 2 H2O (l) + 2 O2 (g)
4 Al (s) + 3 O2 (g) ---> 2 Al2O3 (s)
Nano-particle sized silver atoms are used in anti-microbial bandages and odor-free clothing. A neutral silver-109 (109/47 Ag) atom has ____ protons and ____ neutrons.
47 protons, 62 neutrons
How many moles of water are produced from the complete combustion of 16 moles of C2H5OH? C2H5OH (l) + 3 O2 (g) → 3 H2O (g) + 2 CO2 (g) Note: c = νλ E = hν (when c = 3.00 x 108 m/s) (when h = 6.626 x 10-34 J.s) 1 nm = 1 x 10-9 nm 1 calorie = 4.184 J, 1 Calorie = 4184 J, 1000 cal = 1 kcal 1 mole = 6.022 x 1023 1 amu = 1.66 x 10-24 g
48 moles
The experimental compressed fuel tank of an hydrogen powered vehicle was found to be the equivalent of 470 litres (or 124 gallons - US liquid) of hydrogen or 21.0 moles of hydrogen. Calculate the energy content of the full tank, in kJ, if hydrogen has an energy value of 249 kJ/mol.
5.2 x1 0^3 kJ
A cell phone microprocessor was found to use 3.5 x 1016 atoms of gold (Au) for its printed circuit board. How many atoms of gold does the microprocessor contain? Note: c = νλ E = hν (when c = 3.00 x 108 m/s) (when h = 6.626 x 10-34 J.s) 1 nm = 1 x 10-9 nm 1 calorie = 4.184 J, 1 Calorie = 4184 J, 1000 cal = 1 kcal 1 mole = 6.022 x 1023 1 amu = 1.66 x 10-24 g
5.8 x 10^-8 moles of gold
Calculate the concentration, in molarity (M), of a sodium fluoride mouthwash made by dissolving 0.047 moles of sodium fluoride in 0.80 L of water?
5.9 x 10^-2 mol/L
A 1.48 g sample of diesel was found to contain 875 milligrams of carbon disulfide? What is the concentration of carbon disulfide, in parts per million (ppm), of this diesel fuel?
5.91 x 10^5 ppm
In a tropical rain forest, the water vapor concentration may reach 5.0%. Express this in ppm?
50,000 ppm
The Fukushima nuclear reactor incident produced large quantities of radioactive iodine isotopes. Unfortunately this isotope accumulates in human thyroid gland. How many ___ protons, ___ neutrons, and ___ electrons does the Iodine-131 (131/53 I) isotope have?
53, 78, 53
How many molecules of carbon dioxide are present in 44.01 g of carbon dioxide? Note: c = νλ E = hν (when c = 3.00 x 108 m/s) (when h = 6.626 x 10-34 J.s) 1 nm = 1 x 10-9 nm 1 calorie = 4.184 J, 1 Calorie = 4184 J, 1000 cal = 1 kcal 1 mole = 6.022 x 1023 1 amu = 1.66 x 10-24 g
6.022 x 10^23 molecules of carbon dioxide
Magnesium fluoride is a common anti-reflective coating found on glass lenses. Calculate the molecular weight of magnesium fluoride.
62.31 g/mol
The bond breaking process (total energy of the reactants) was found to be +782 kJ and the bond making process (total energy of the products) was found to be -115 kJ. Calculate the overall (net) energy of this chemical reaction.
667 kJ
Over a 1 hour workout, a Crossfit athlete was measured to exhale a total volume of 46840 L of air at a rate of 115 breaths a minute. Calculate the volume of each breath taken by this athlete?
7 L/breath
Radioactive carbon dating measures the quantities of radioactive 14^C isotope present in fossils. How many neutrons are present in the 14^C isotope?
8
What is the correct mass percentage content of carbon in the fuel octane, C8H18?
84 %
The concentration of dinitrogen monoxide (N2O) in the atmosphere is 45 parts per billion (ppb). If there are 2 x 10^22 molecules of air in a breath, how many molecules of dinitrogen monoxide are there in each breath?
9 x 10^14 N2O molecules/breath
X-ray scanners are often used at airports. What is the wavelength of an x-ray with a frequency of 3.2 x 1013 Hz? Note: c = νλ E = hν (when c = 3.00 x 108 m/s) (when h = 6.626 x 10-34 J.s) 1 nm = 1 x 10-9 nm 1 calorie = 4.184 J, 1 Calorie = 4184 J, 1000 cal = 1 kcal 1 mole = 6.022 x 1023 1 amu = 1.66 x 10-24 g
9.4 x 10^-6 m
The longest fingernails in the world belong to Shridhar Chillal, India. His combined nails were measured at 9.096 x 10^2 centimeters, almost the same length as a London bus. Which answer shown below is correctly represents this length to 1 significant figure? - 900 cm - 910 cm - 909 cm - 909.6 cm
910 cm
The average human circulatory system is 9.663 x 10^7 meters in length. Which of the following correctly represents the original length, to 3 significant figures? - 96600000 m - 96600 m - 0.000000966 m - 0.00000097 m
96600000 m
What is the mass (in grams) of 1 mole of sulfuric acid (H2SO4)? Note: c = νλ E = hν (when c = 3.00 x 108 m/s) (when h = 6.626 x 10-34 J.s) 1 nm = 1 x 10-9 nm 1 calorie = 4.184 J, 1 Calorie = 4184 J, 1000 cal = 1 kcal 1 mole = 6.022 x 1023 1 amu = 1.66 x 10-24 g
98.09 g
Which of the following is the correct Lewis structure for a oxygen atom?
:O: "
Choose the molecule below that does not obey the Lewis structure guidelines?
:O: = :O: - Three lines in between both Oxygens
Which statement is true? - A catalyst increases the rate of a chemical reaction. - A catalyst increases the time necessary for a chemical reaction to occur. - A catalyst does not alter the time necessary for a chemical reaction to occur. - A catalyst decreases the rate of a chemical reaction.
A catalyst increases the rate of a chemical reaction.
Which schematic diagram best describes a polymer?
A chain: *----*----*----*----*
Which of the following is regarded as an indication of a chemical reaction? - change in temperature - change in colour - production of a gas - all of the above
All of the above
Cell phones contain a radio-frequency filter made from the crystalline neutral ionic compound, AlN. What is the correct chemical name of the neutral ionic compound AlN?
Aluminium Nitride
This element is utilized by the aircraft, automobile, packing, and construction industries. Household items (kitchen utencils, baseball bats, watches, etc.) also find use for this element. It has an Atomic number of 13 and three outer (or valence) electrons. What is this element?
Aluminium, Al
Which of the following is true? - An endothermic reaction absorbs heat energy from the surroundings. - An exothermic reaction absorbs heat energy from the surroundings. - Burning wood is an example of an endothermic reaction. - Temperature does not indicate the direction of heat flow.
An endothermic reaction absorbs heat energy from the surroundings.
Which bond shown below is the least polar? - Ge-O - As-Te - N-Se - Si-Br
As-Te
Which molecule below has a trigonal planar electron geometry? - BF3 - nitrogen molecule - CH4 - carbon dioxide
BF3
Which molecule below has a trigonal planar electron geometry? - carbon dioxide - nitrogen molecule - BF3 - CH4
BF3
Welding rods and fluxes are commonly coated with a chemical compound that contains a combination of flurine and element "X" (which can be found in Row 6 and contains 56 protons). What is the identity of element "X"?
Barium, Ba
Beryllium and nitrogen are combined to produce a material suitable for high temperature materials designed to reflect heat such as crucibles, furnaces, kilns, incinerators, and nuclear reactors. What is the chemical name and chemical formula of this neural ionic compound?
Beryllium Nitride, Be3N2
This non-magnetic element is used to make tools for MRI machines at hospitals. It has two outer (or valence) electrons and an atomic number of 4. What is this element?
Beryllium, Be
This element is a key ingredient in Pyrex glass, nuclear reactors, some soaps and disinfectants. this element is found in Group 3A, Row 2 of the Periodic table. What is the element?
Boron, B
Which one of the following is an allotrope of carbon? - ozone - C60 (aka Buckminster Fullerene ball) - carbon monoxide - carbon dioxide
C60 (aka Buckminster Fullerene ball)
To keep packaged beef looking red and fresh, a mixture of carbon dioxide and carbon monoxide gas is sometimes added during packaging. What is the chemical formula of carbon dioxide, formed by the combustion of carbon based fuels with oxygen?
CO2
Widely used to fumigate grains and fresh fruit storage bins, the compound CS2 is also classified as an air-pollutant. What is the correct chemical name of CS2?
Carbon Disulfide
Which one of the following is an allotrope of carbon? - carbon dioxide - carbon monoxide - diamond - ozone
Diamond
A student calculates the energy of a reaction and plots an energy diagram (shown below). Was the chemical reaction exothermic or endothermic? Ex. Reactants (low), Products (high)
Endothermic
Which statement is false? - Energy is the capacity to do work. - Water boils at 373 K. - Kinetic energy is transferred from hotter objects to cooler objects. - Energy transfers from cold to warm objects.
Energy transfers from cold to warm objects.
Which Lewis structure correctly represents the chemical compound H2O?
H --- :O: ---H
Which chemical compound (below) contains the strongest covalent bond?
H --- C (3 lines) C --- H
Plants are utilise the covalent compound dihydrogen monoxide during photosynthesis. Which of the following is the correct chemical formula for this chemical compound? - H2O3 - H2O2 - HO2 - H2O
H2O
Which molecule is classified as a heteronuclear molecule? - O3 - N2 - Cl2 - H2S
H2S
In acid-base chemistry H+ is often used to represent which polyatomic ion shown below?
H3O ---> Diagram: H --- :O+ --- H | H
Complete the chemical equation below showing the release of one hydrogen ion from a molecule of carbonic acid in water: H2CO3 (g) + H2O(l) --> _________ + _________
H3O+ (aq) + HCO3- (aq)
Which of the following can be classified as a acidic solution in acid-base chemistry? - pumpkin spice latte - NaOH (aq) - NaCl (aq) - H3PO4 (aq)
H3PO4 (aq)
Which of the following is classified as an element? - sodium chloride - maple bacon donut - helium - deodorant
Helium
Which of the following is considered to be part of the octet guidelines for drawing Lewis Structures?
Hydrogen atoms cannot be a central atom because it can only form one bond to another atom.
An essential part of water, this element contains zero neutrons, one proton and one valence (aka. outer) electron. What is this element?
Hydrogen, H
According to the Emergency Response Guide (ERG) #144; the chemical compound iodine pentafluoride is a gas at 9 degrees C, is an oxidizer, is corrosive to tissue, toxic if inhaled and is extremely reactive to water. The safety data sheets (SDS), from the manufacturer of this chemical compound, suggests the use of a positive pressure self-contained breathing apparatus (SCBA). What is the correct chemical formula of iodine pentafluoride?
IF5
Why is Thursday May 14, 2020 at 9:30am an important date and time for our Chemistry Lecture Course?
It's the date of our Chemistry Final Exam.
This element used widely in alloy wheels and can be found in spinach and walnuts. What is the name and symbol of this element that contains 12 protons and 2 valence electrons?
Magnesium, Mg
Optical lenses are often coated with magnesium fluoride as an anti-glare coating. What is the chemical formula of the chemical compound magnesium fluoride?
MgF2
Which (half-cell) reaction shown below is an example of a reduction? - 2 Cl- (aq) --> Cl2 (aq) + 2e- - Ni (s) + 2e- --> Ni^2+ (aq) - 4 S^2-(aq) --> S4(s) + 2e- - Fe (s) --> Fe^2+(aq) + 2e-
Ni (s) + 2e- --> Ni^2+ (aq)
Which among those shown below is the largest fraction of inhaled air? - argon - CO2 - nitrogen - oxygen
Nitrogen
What are the spectator ions in the acid-base neutralization reaction between beryllium hydroxide and sulfuric acid is shown below? H2SO4 (aq) + Be(OH)2 (aq) --> Be(SO4) (aq) + 2 H2O (l)
OH- (aq) and H+ (aq) ions
One of the more expensive elements that can be purchased commercially contains 46 protons and is valued at approximately $1800 per ounce. It is used in jewelry and catalytic converters. What is this element?
Palladium
Which statement is true? - Compared to nitrogen molecules, water has a high boiling point due to the absence of hydrogen bonding and bacon. - Water is a non-polar molecule due to the presence of hydrogen bonding. - Polar water molecules will dissolve polar and ionic chemical compounds. - Ice floats due to the intermolecular ionic bonds between water molecules and bacon.
Polar water molecules will dissolve polar and ionic chemical compounds.
Which correctly describes a polymer? - Polymers are large molecules made up of long chains of bacon covalently bonded together. - Polymers are large molecules made up of long chains of atoms covalently bonded together. - Polymers are large molecules made up of long chains of atoms ionically bonded together. - Polymers are large molecules made up of long chains of atoms that are not bonded together.
Polymers are large molecules made up of long chains of atoms covalently bonded together.
The processed food industry use KCl in lower sodium chloride foods (e.g. Heart Healthy foods). What is the chemical name for KCl?
Potassium Chloride
Which ionic compound, shown below, is insoluble in pure water? - Li2CO3 - SrCl2 - Na2CO3 - SrSO4
SrSO4
Which of the following is classified as an element? - dihydrogen monoxide - sulfur - bacon flavored soda - caffeine
Sulfur
Which chemical compound, shown below, has an angular (or bent) molecular geometry and a trigonal planar electron geometry? - nitrate polyatomic ion (NO3)- - sulfur dioxide - water - methane (CH4)
Sulfur Dioxide
Which statement is false? - The rate of a chemical reaction can be increased by the addition of a catalyst. - The rate of a chemical reaction can be increased by increasing the surface area of the reactants. - The rate of a chemical reaction can be increased by increasing the temperature of the chemical reaction. - The rate of the chemical can not be increased of decreased.
The rate of the chemical can not be increased of decreased.
Which statement about the waves in the electromagnetic spectrum is true?
The wavelength of the radiation is inversely proportional to frequency.
Which statement about the waves in the electromagnetic spectrum is true? - The wavelength of the radiation is inversely proportional to frequency. - The lower the energy of the wave the higher its frequency. - The higher the energy of the wave, the longer its wavelength. - The longer the wavelength of the wave, the higher its frequency.
The wavelength of the radiation is inversely proportional to frequency.
Why can both carbon dioxide and water be considered as greenhouse gases?
Their shape allows them to stretch and bend when they absorb infrared radiation.
Choose the correct statement regarding the shaded boxes shown on the Periodic Table on the right? - They are Group 2A - They are Group 5A - They are Group 7A - They are Group 8A (Noble gases)
They are Group 2A
Which statement is true? - Non-polar vegetable oil will dissolve polar water. - Water has a high boiling point due to the presence of hydrogen bonding. - Water is a non-polar molecule due to hydrogen bonding. - Ice floats on water due to the ionic bonds between water molecules.
Water has a high boiling point due to the presence of hydrogen bonding.
Which is statement is true? - Dr Mijares has run out of corny but sometimes funny cat pictures. - Water is an essential greenhouse gas in the Earth's atmosphere. - Bacon soda is a healthy alternative to water. - Justin Bieber's new album is classified as a greenhouse gas.
Water is an essential greenhouse gas in the Earth's atmosphere.
Which is statement is true? - Justin Bieber's new album is classified as a greenhouse gas. - Baconnaise a is a healthy alternative to mayonnaise. - Water is an essential greenhouse gas in the Earth's atmosphere. - Dr Mijares has run out of corny but sometimes funny cat pictures.
Water is an essential greenhouse gas in the Earth's atmosphere.
Which part of the electromagnetic spectrum listed below contains the highest amount of energy?
X-rays
Which of the following is the most acidic solution? pH = -log([H+]) pOH = -log ([OH-]) - [H+] = 5.00 x 10^-2 M - [H+] = 1.00 x 10^-7 M - [H+] = 6.31 x 10^-10 M - [H+] = 1.00 x 10^-4 M
[H+] = 5.00 x 10^-2 M
According to electronegativity values, which molecule contains the most polar bond? - ammonia (NH3) - GeSe - carbon tetrachloride - carbon disulfide (CS2
ammonia (NH3)
According to electronegativity values, which molecule contains the most polar bond? - carbon disulfide (CS2) - carbon tetrachloride - GeSe - ammonia (NH3)
ammonia (NH3)
(NH4)2CO3 is a weak base, also known as baker's ammonia and was an old fashioned leavening agent. It is also the active ingredient in smelling salts. What is the chemical name of (NH4)2CO3?
ammonium carbonate
An unlabeled bottle of liquid was found in the kitchen. After it was tested, it showed a pOH of 11.5. This solution can be labeled as _______?
an acidic solution
Which of the following can be referred to as a mixture? - oxygen - carbon monoxide - lithium - bacon seaweed/nori
bacon seaweed/nori
Arrange these colors from the visible spectrum in order of decreasing energy, Green , Blue, Red, and Yellow?
blue, green, yellow, red
Which chemical compound, shown below, contains the strongest covalent bond? - nitrogen dioxide - CH4 - carbon monoxide - CH2IBr
carbon monoxide
Arrange these types of radiation in order of decreasing energy: x-rays, infrared radiation, radio waves, visible light.
microwave, visible light, UV, x-rays (lowest) --> --> (highest)
Which molecule shown below, due to its shape, is not classified as a greenhouse gas? - bacon - methane (CH4) - oxygen (molecular) - water
oxygen (molecular)
Humans do not have acid in their blood so the acidity of human blood cannot not be measured directly as pH. Instead we measure the bicarbonate concentration in human blood (aka an [OH-] value). A patients blood was found to contain an [OH-] value of 4.46 x 10-8 M. What is the pH value of this patients blood? pH = -log([H+]) pOH = -log ([OH-])
pH 6.65
Which ionic compound, shown below, is soluble in pure water? - strontium carbonate - potassium carbonate - calcium carbonate - beryllium carbonate
potassium carbonate
If one breath of air contains 2.0 x 10^22 molecules, and the concentration of ozone is 0.12 ppm. How many ozone molecules are present in each breath?
2.4 x 10^15 O3 molecules per breath
If one breath of air contains 1.0 x 10^16 molecules, and the concentration of ozone is 570 ppm. How many molecules of oxygen from ozone are present in each breath?
5.7 x 10^12 ozone molecule per breath
Arrange these colors from the visible spectrum in order of increasing energy, green, blue, yellow and red
red, yellow, green, blue