chemistry quiz 1
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| how do you find the average atomic mass? 62.9396 69.17% and 64.9278 and 30.83% | show 🗑
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| show | mass (Kg), length (m), time (s), temperature(K), amount(mol), luminousinty (Cd), electric current (amp)
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| show | 85 kg
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| show | mass X acceleration of gravity
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| show | matter
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| the only fundamental unit with prefix is the ________ | show 🗑
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| 10^9 | show 🗑
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| show | Tetra (T)
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| show | micro
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| show | nano
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| 10^-12 | show 🗑
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| show | deciliter
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| show | phemto
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| show | ato
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| show | guaco
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| show | units
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| show | precise
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| all non-zero digits are _____________ | show 🗑
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| show | significant
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| show | not significant
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| show | significant
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| trailing zeros before the decimal place are ____________ | show 🗑
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| what are exact numbers? | show 🗑
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| show | least
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| show | round to the number with the least amount of decimal places
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| what is temperature? | show 🗑
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| All matter can be classified as either a _______ or a _______ ________. Mixtures can be further classified as _______or _______. Pure substances can be further classified as ________ or __________. | show 🗑
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| Mixtures can be separated into their component parts through_______ means, whereas pure chemical substances require________ or_________ reactions to separate them | show 🗑
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| show | 108 Kg
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| show | law of conservation of mass
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| show | 1950 g
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| show | law of definite proportions
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| look at dalton's atomic theory question 7 chapter 1 hw | show 🗑
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| show | rearrange; identities
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| show | 3.20 grams
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| The_______ ______ (__) is the number of protons in the nucleus of an atom of an element.It is used to distinguish different elements from one another. | show 🗑
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| The _____ ______ (__) is the sum of the number of protons and neutrons in the nucleus of an atom of an element. Atoms that have the same atomic number but different these are called ________. | show 🗑
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| when writing out the chemical symbol, the _____ number goes on top and the ______ goes on the bottom, to the left of the chemical symbols | show 🗑
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| show | atom;
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| The building blocks for atoms have been discovered to be three different kinds of subatomic particles: what are they?. Different_________ of these subatomic particles lead to the formation of atoms of different elements, charges, and mass | show 🗑
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| show | 2; 8
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| So what keeps these positively charged protons from repulsing each other since like charges are known to repel from one another? | show 🗑
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| show | strong nuclear force
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| show | Since the atomic mass of chlorine, 35.45 amu, is closer to 35 than it is to 37, 35Cl must be the most abundant isotope.
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| show |
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| show | take the percentages of the elements in the compound and average them together. do this for each of the 4 possible combinations of the compound and see which is the largest to smallest number
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| show | 68.926 amu
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| How many milliliters of liquid does the smaller graduated cylinder contain? question 2 chapter 2 hw | show 🗑
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| An__________ property is independent of the amount of the sample. An__________ property varies with the amount of the sample. | show 🗑
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| show | intensive; extensive
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| color, density, and temperature are _________ properties | show 🗑
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| show | extensive
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| show | 2.3 kg
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| You wash dishes for a chemistry laboratory to make extra money for laundry. You earn 12 dollars/hour, and each shift lasts 75 minutes. Your laundry requires 12 quarters/load. How many shifts must you work if you wish to wash 10 loads of laundry? | show 🗑
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| show | 15
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| You earn 12 dollars/hour, and each shift lasts 75 minutes. Your laundry requires 12 quarters/load. How many loads of laundry will each shift pay for if the cost per load rises to 16 quarters? | show 🗑
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| A bakery measured the mass of a whole cake as 0.870 kg. A customer bought one slice of the cake and measured the mass of the slice as 0.1151 kg. What is the mass of the remaining cake, without the one slice? | show 🗑
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| show | 2.01 g/cm^3
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| show | 16
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| Compute 1240.64/12.5. Round the answer appropriately. | show 🗑
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| Compute 9.3456+2140.56. Round the answer appropriately. | show 🗑
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| Compute 4.659×104−2.14×104. Round the answer appropriately. | show 🗑
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| In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 36.0 mi/gal , how many liters of gasoline would you need to buy to complete a 142-km trip in Europe? Use the following conversions: 1km=0.6214mi and 1gal=3.78L. | show 🗑
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| While in Europe, if you drive 103 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 32.0 mi/gal ? Assume that 1euro=1.26dollars. | show 🗑
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| show | 33.5 km/h
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| show | .560 kg
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| 4.3×10−6 is between which two numbers? | show 🗑
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| problems 11 and 12 - unit conversion | show 🗑
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| show | 5 mL
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| reddish brown in color - extensive or intensive? | show 🗑
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| begins to melt at 1083.4 degrees Celsius - extensive or intensive? | show 🗑
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| has a density of 8.96 g/ml - extensive or intensive? | show 🗑
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| show | extensive
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| has a mass of 50.89 g - extensive or intensive? | show 🗑
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| You are given a sample resembling copper. Which of the following properties could be used to help determine whether the sample is really copper? check all that apply. a. density of sample b. melting pt of sample c. volume of sample | show 🗑
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| show | intensive
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| show | extensive; intensive
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| After________ or ___________, the answer cannot have more significant figures than any of the original numbers. | show 🗑
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| show | addition or subtraction
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| show | fewest
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| show | fewest
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| density= | show 🗑
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| show | temperature;
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| why shouldn't density be confused with weight? | show 🗑
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| Since density can be seen as a simple ratio of mass per unit of volume, changing either parameter alone causes density to _______ or __________ | show 🗑
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| show | increases
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| increasing the mass while keeping the volume constante _________ density | show 🗑
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| show | decreases
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| show | decreasees
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| dividing the mass and volume by the same factor _________ density | show 🗑
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| multiplying the mass and volume by the same factor _________ density | show 🗑
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| show | 3.37 x 10^4 g
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| A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 3.9 cm . Its mass is 1.2 kg . Calculate the density of the metal. | show 🗑
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| show | 1 g/ mL
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| show | 4.49 g/cm^3
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| show | m= 22.55 g
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| Acetone (nail polish remover) has a density of 0.7857 g/cm3. What is the volume, in milliliters, of 6.60 g of acetone? | show 🗑
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| The average normal human body temperature is 98.6 ∘F.; What is normal body temperature in degrees Celsius? | show 🗑
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| The average normal human body temperature is 98.6 ∘F. What is normal body temperature in kelvins? | show 🗑
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| show | one celsius degree and one kelvin degree is the same; then smaller one fahrenheight degree
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| show | 4.1 x 10^14 g/cm^3
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| show | 240 km
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| show | .231 mol (13)C
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| Based on your answer in Part A, calculate the number of atoms in this amount of 13C? | show 🗑
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| Based on your answer in Part B, how many electrons are in this amount of 13C? | show 🗑
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| Based on your answer in Part B, how many neutrons are in this amount of 13C? | show 🗑
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| show | SiO(2)
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| show | 5.42x10^22
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| Rolls of aluminum foil are 306 mm wide and 0.020 mm thick. What maximum length of aluminum foil can be made from 0.98 kg of aluminum?( d(aluminum)=2.70 g/cm3) | show 🗑
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| A pure titanium cube has an edge length of 2.71 in. How many titanium atoms does it contain? Titanium has a density of 4.50g/cm3. | show 🗑
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| show | particles; photons; waves
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| show | c=wavelength x frequency
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| show | 3.00×10^8
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| show | E=h x v
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| Note that frequency has units of________ _________ (s−1), which are more commonly expressed as _________). | show 🗑
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| show | wavelength; meters
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| Every wave also has a _____________, which is the number of wavelengths that pass a certain point during a given period of time. | show 🗑
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| Frequency, given the symbol ν (lowercase Greek "nu"), is usually measured in _______ __________). __________, another unit of frequency, is equivalent to that measurement. | show 🗑
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| show | speed; m/s); constant
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| show | electromagnetic radiation
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| _________rays have the greatest energy, whereas________ waves have the least energy | show 🗑
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| energy is measured in _________ | show 🗑
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| show | wave
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| show | packets; atoms
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| The phenomenon known as_________ radiation is the temperature-dependent emission of EM radiation | show 🗑
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| look at #3 blackbody radiation on homework ch 3 | show 🗑
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| show | 400 and 750
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| Even though the other regions are not visible, they all play very important roles in our lives, such as their use in wireless communication, cooking, medicine, etc. T | show 🗑
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| Light and the colors of light are how our eyes perceive those_________ of EM radiation | show 🗑
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| show | energy
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| show | Power; power density
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Created by:
jackjack109