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