Chem 1 - Ramachandran - P.S.C. - Summer 2016 (quiz 1, quiz 2, test 1, [nomenclature special cations, polyatomic Anions, monatomic cations/anions])
What is the fahrenheit to celsius formula
(°F - 32) x 5/9 = °C
¹⁵N³⁻ - A =
15
A combination of sand, salt, and water is an example of a ________.
heterogeneous mixture
The elements in groups IA, VIIA, and VIIIA are called _____, respectively
, , and
¹⁵N³⁻ - number of electrons?
10
¹⁹⁷Au - number of neutrons?
118
²⁰²₈₀Hg²⁺ - number of neutrons?
122
The formula weight of (NH₄)₂SO₄, rounded to the nearest integer, is
132
________ significant figures should be retained in the result of the following calculation. (11.13-2.6) x 10⁴ / (103.5+16.9)10⁻⁶ 1 2 3 4 5
2
The correct answer (reported to the proper number of significant figures) to the following is ________. 6.3 × 3.25 = ________ 20.475 20. 21 20.48 20.5
20.
²⁰²₈₀Hg²⁺ - A =
202
Of the following, ________ is the largest mass. [Use Table 1.5 in the text book] 2.5 × 1015 pg 2.5 × 1010 ng 2.5 × 10-2 mg 25 kg 2.5 × 109 fg
25 kg
The number with the most significant zeros is ________. 0.00002510 0.02500001 2.501 × 10-7 2.5100000 250000001
250000001
Which of the following is (are) the lowest temperature? The freezing point of water 280 K 30 °F 5 °C A and D
30 °F
the formula weight of lead nitrate (Pb(NO₃)₂) is 331.2; its molar mass is _____g
331.2
3.337 g/cm3 = ________ kg/m3 333.7 3337 0.3337 3.337 × 10-9 3.337 × 10-5
3337
⁸⁰₃₅BR - Z =
35
⁸⁰₃₅BR - number of electrons?
35
What is the formula weight of CO²
44.0 C = 12.0 O = 16.0 x 2
¹⁵N³⁻ - number of neutrons?
8
²⁰²₈₀Hg²⁺ - Z =
80
²⁰²₈₀Hg²⁺ - number of protons?
80
⁸⁰₃₅BR - A =
80
Acceleration due to gravity of a free-falling object is 9.8 m/s2. Express this in millimeters/millisecond². 9.8 × 10-6 9.8 × 10-9 9.8 × 106 9.8 × 10-3 9.8 × 103
9.8 × 10-3
What is group IA known as
alkili metals
Which states of matter are significantly compressible?
gases only
What is group VIIIA known as
noble gasses
Of the following on ______ is an extensive property frezing point boiling point density temperature volume
volume
Of the following, only ________ is an extensive property. boiling point volume temperature density freezing point
volume
What is the celsius to fahrenheit formula
°C x 9/5 + 32 = °F
Which is an isotope of Carbon C ¹²C CO
¹²C
"Absolute zero" refers to ________. 273.15 °C 0° Celsius 0 Kelvin °C + 9/5(°F - 32) 0° Fahrenheit
0 Kelvin
1 kilogram = ________ milligrams 1,000,000 1,000 10,000 1 × 10-6 none of the above
1,000,000
Which is a molecular compound CaS CO₂
CO₂
Of the reactions below which is a decomposition reaction 2N₂ + 3H₂ → 2NH₃ Cd(NO₃)₂ + Na₂S → CdS + 2NaNO₃ 2Mg + O₂ → 2MgO CaCo₃ → CO₂ + CaO 2CH₄ + 4O₂ → 2CO₂ + 4H₂O
CaCo₃ → CO₂ + CaO
Which is an ionic compound CaS CO₂
CaS
What is the chemical name for Ca₃(₂PO₄)
Calcium phosphate
Which is a monatomic cation O²⁻ Ca²⁺
Ca²⁺
What is the chemical name for Cu(NO₃)₂
Copper nitrate or Cupric nitrate
What is the chemical formula for Copper (II) nitrate (cupric nitrate)
Cu(NO₃)₂
What is the chemical name for HBrO₄
Perbromic acid
The correct result (indicating the proper number of significant figures) of the following addition is ________. 12 1.2 0.12 + 0.012 13 13.3 13.33 13.332 none of the above
13
¹⁹⁷Au - A =
197
There are ________ significant figures in the answer to the following computation: (29.2-20.0)(1.79x10⁵)/1.39 1 2 3 4 5
2
⁸⁰₃₅BR - number of protons?
35
Round the number 3456.5 to two significant figures. 3400.0 3400 3500 3000.0 3000
3500
What is the molar mass of CO₂
44.0g/mol
⁸⁰₃₅BR - number of neutrons?
45
¹⁵N³⁻ - Z =
7
¹⁵N³⁻ - number of protons?
7
A wooden object has a mass of 10.782 g and occupies a volume of 13.72 mL. What is the density of the object determined to an appropriate number of significant figures? 8 × 10-1 g/mL 7.9 × 10-1 g/mL 7.86 × 10-1 g/mL 7.859 × 10-1 g/mL 7.8586 × 10-1 g/mL
7.859 × 10-1 g/mL
The density of a gold nugget is 19.3 g/cm3. If the volume of the gold nugget is 0.00369 L, the mass of the nugget is ________ g. 19.3 0.191 5.23 71.2 none of the above
71.2
²⁰²₈₀Hg²⁺ - number of electrons?
78
¹⁹⁷Au - Z=
79
¹⁹⁷Au - number of electrons?
79
¹⁹⁷Au - number of protons?
79
What is an elemental substance
A substance made of just one element. (the molecular formula is just the element's name. ex: Au)
Define: Oxyanion
An anion that contains oxygen
Define "Z"
Atomic mass
What defines an element's spot in the periodic table
Atomic number
What is the chemical formula for calcium phosphate
Ca₃(₂PO₄)
True or False: F⁻ is an oxyanion
False
True or False: Steam fogging up a bathroom mirror is a physical change called evaporation
False condensation
True or False: Milligram (mg) is the S.I. unit for a substance
False grams (g)
True or False: Leading zeros in a number are always significant
False never
What is the chemical formula for ferrous sulfate
FeSO₄
What is the chemical formula for perbromic acid
HBrO₄
Define "A"
Mass number
The charge on an electron was determined in the
Millikan oil drop experiment
What is the formula for nitrogen dioxide
NO₂
What is the formula for a hydroxide ion
OH⁻
Which is a monatomic anion O²⁻ Ca²⁺
O²⁻
What is the chemical formula for tetraphosphorous decasulfide
P₄S₁₀
What is the chemical name for P₄S₁₀
Tetraphosphorous decasulfide
Define Atomic mass
The number of protons and neutrons in an atom
Define atomic number
The number of protons in an atom
The empirical formula always indicates _____
The smallest whole number ratio of different atoms in a compound
True or False: 10 moles of gold will contain 6.022x10²⁴ gold atoms
True
True or False: The atomic weight of lead is equal to the formula weight of Pb
True
True or False: The molar mass of ¹²C is exactly 12
True
True or False: The plumb pudding model was proposed by J.J. Thompson
True
True or False: ammonium ion is a polyatomic cation
True
True or False: compounds are electrically neutral
True
What is another name for mass number
atomic mass
Isotopes are atoms that have the same _____ but differing _____ atomic masses, charges atomic numbers, mass numbers charges, atomic masses mass numbers, charges mass numbers, atomic numbers
atomic numbers, mass numbers
For which of the following can the composition vary? element pure substance homogeneous mixture heterogeneous mixture both homogeneous and heterogeneous mixtures
both homogeneous and heterogeneous mixtures
Of the following the smallest and lightest subatomic particle is the nucleus α-particle neutron electron proton
electron
What is the chemical name for FeSO₄
ferrous sulfate
Which is a heterogeous mixture granite sugar solution
granite
What is group VII known as
halogens
A small amount of salt dissolved in water is an example of a ________.
homogeneous mixture
Accuracy refers to ________. how close a measured number is to infinity how close a measured number is to zero how close a measured number is to the calculated value how close a measured number is to the true value how close a measured number is to other measured numbers
how close a measured number is to the true value
Gases and liquids share the property of ________.
indefinite shape (no shape of their own)
Which one of the following is not an intensive property? mass melting point boiling point density temperature
mass
What is another name for atomic mass
mass number
What is the chemical name for NO₂
nitrogen dioxide
All atoms in a given element have the same
number of protons
Which is a homogenous mixture granite sugar solution
sugar solution
Of the following, only ________ is a chemical reaction. dissolving sugar in water crushing of stone melting of lead tarnishing of silver dropping a penny into a glass of water
tarnishing of silver
In the following list, only ________ is not an example of a chemical reaction. the rusting of iron dissolution of a penny in nitric acid the formation of polyethylene from ethylene a burning candle the condensation of water vapor
the condensation of water vapor
