What are all metric measurements composed of? - ANSWER-Metric
prefix and a basic unit of measure
What is the most commonly used temperature scale in the scientific
community? - ANSWER-Celsius or centigrade
The nucleus of an atom contains or is made up of: - ANSWER-protons
and neutrons
What is an atom that has a positive charge? - ANSWER-Cathode
In the periodic table, what are the rows called? - ANSWER-Periods
What is the Atomic number? - ANSWER-number of protons
What is the atomic mass? - ANSWER-Average mass of that elements
isotopes
Chemical equations are written in which matter? - ANSWER-
Reactants → Products
What is the charge on potassium in the compound KCl - ANSWER-+1 A
catalyst is a substance that accelerates a reaction by
,which of the following? - ANSWER-Finding an alternate pathway for a
reaction that requires less energy.
Percent concentration of a solution is expressed: - ANSWER-parts per
100 parts
What will 1 Liter of a 1 molar solution of any element contain: -
ANSWER-The atomic mass in grams of that element
Chemical bonding is the bonding of what: - ANSWER-One atom to
another atom
What is ionic bond - ANSWER-it does not share electrons
The reaction 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O has a ration of 2 parts
ethane and 7 parts oxygen. How many parts of Ethane will be needed
to react with 21 parts of oxygen? - ANSWER-6 parts of ethane
What is the concentration of 58.6 grams of NaCl in 2 Liters of solution.
Atomic weights are Na = 23g/mol, Cl = 35.5g/mol - ANSWER-0.5 mol
NaCl
In a redox reaction which describes reduction? - ANSWER-It is the
gain of electrons
What are acids? - ANSWER-Hydrogen donors
,scientific notation - ANSWER-the scientific system of writing numbers
What are the three parts to scientific notation? –
ANSWER-Mathematical sign (+ or -) significand
exponential (logarithm)
What does the mathematical sign of scientific notation indicate? -
ANSWER-number is positive (+) or negative (-)
What is the significand? - ANSWER-the base value of the number or
the value of the number when all the values of 10 are removed
What is the exponential? - ANSWER-a multiplier of the significand:
If positive factors of 10
If negative factors of 1/10
-9.0462 x 10^5, what is the mathematical sign? - ANSWER-negative (-)
-9.0462 x 10^5, what is significand? - ANSWER-9.0462
-9.0462 x 10^5, what is the exponent? - ANSWER-10^5
What are the basic measurements of the metric system? –
ANSWER-grams (g) liters (L)
meters (m)
, What are grams used to measure? - ANSWER-weight / mass
What are liters used to measure? - ANSWER-volume
What are meters used to measure? - ANSWER-distance
What does the prefix Tera mean? - ANSWER-trillion; 10^12
What does the prefix Giga mean? - ANSWER-billion; 10^9
What does the prefix Mega mean? - ANSWER-million; 10^6
What does the prefix kilo mean? - ANSWER-thousand; 10^3
What does the prefix hecto mean? - ANSWER-hundred; 10^2
What does the prefix deka mean? - ANSWER-ten; 10^1
What does the prefix deci mean? - ANSWER-one tenth of; 10^-1
What does the prefix centi mean? - ANSWER-one hundredth; 10^-2
What does the prefix milli mean? - ANSWER-one thousandth; 10^-3
What does the prefix micro mean? - ANSWER-one millionth; 10^-6
What does the prefix nano mean? - ANSWER-one billionth; 10^-9
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