Chemistry Lab (FINAL REVIEW)

The number 1.987 x 10^6 in normal decimal notation is ____________.

1,987,000

Automotive batteries generally are filled with sulfuric acid. If a battery has a volume of 1.86 L and contains 3.42 x 10^3 grams of sulfuric acid, what is the density of sulfuric acid in g/mL

1.84 g/mL

A rubber band is found to weigh 0.0978 g. What is the total mass of 106 such identical rubber band? Express the answer to the correct number of significant figures

10.4g

What is the correct exponential term for the following mathmatical operation? 10^8 + 10^3/ 10^4 X 10^5

10^-4

What volume of a solution with a density of 13.9 g/mL is needed to provide 155 grams of solution?

11.2 mL

If object A weighs 24 grams and has a volume of 3 mL and object B weigh 14 grams and has a volume of 7 mL _____________.

A is four times as dense as B

Which one of the following compound names is paired with an incorrect formula?

Potassium Carbonate - KHCO3

Which statement best describes a sample of gas

a gas has a definite volume, but its shape is determined by its container

Which device below is the most accurate for measuring volume?

a graduated pipet calibrated in 0.1 millileter units

Which of the following is a property of both solids and liquids

definite volume

What is the correct name for Cl2 O7?

dichlorine heptoxide

Name of N2O5

dinitrogen pentoxide

Name for N2 O4

dinitrogen tetraoxide

Which of the following is a physical change

filtering muddy water

In which of the following pairs are both chemical properties

flammable, reacts with acid

Elements in group VA of the periodic table ____________.

form ions with a charge of 3-

In order to form an octect, an atom of selenium will:

gain 2 electrons

Which of the following statements concerning the "significance" of zeros in recorded measurement is incorrect?

trailing and leading zeros are not always significant

The molecular geometry of a Cl2 CO molecule is ____________.

trigonal planar

A lab technician was assigned the task of determining the density of a sample of blood plasma. The technician performed three replicate measurements of the density of the sample and reported the following results: 0.810g/ml, 1.375g/ml, 2.046g/ml The actual density of blood plasma is 1.027g/ml in evaluating the technician's job performance in terms of accuracy and precision, it can be said the the technician ___________.

was neither accurate nor precise

(7.0 x 10^-6) x (3.00 x10^4)=

.21 or 2.1 x 10^-1

The number 0.090804, when rounded off to 4 sigfig would appear as ___________.

0.09080

How many significant figures are found in 300 grams

1

The correct answer for the calculations 126 x 1.364 / 135 x 0.8951 where 126 and 135 are counted numbers and 1.364 and 0.8951 are measured numbers is __________.

1.422

How many of the following numbers has 4 significant figures? 19.00 0.00006 1.609x10^8 13,600

2

The total number of shared electron pairs in the molecule H2S is ____________.

2

(8.00 x 10^6)/(4.00 x 10^4)

2.00 x 10^2

Indicate the total number of electrons which would be shown as "dots" in a correctly written Lewis dot structure for OF2.

20

Calculate the total number of electrons in the Lewis structure for the C2 H3 O2- ion

24

What mass in grams of a 5.00% by mass sugar water solution is needed to supply 12.5 g of sugar

250 g

How many grams of alcohol are present in 2 bottles (992 g total mass of mixture) of an alcohol?water mixture of that is 25.6% alcohol by mass

254 g alcohol

The total number of valence electrons in a molecule of SOF2 is ____________.

26

Do the following calculation. How many significant figures are justified for the answer? 6.02 + 5.119 + 0.04218

3

How many significant figures are found in 0.0207 pounds

3

How many significant figures are found in 66,900,000 miles

3

In which one of the following numbers are none of the zeros significant?

3100

How many significant figures are found in 20.10 liters

4

In a laboratory class with 80 students 50% of the students are male, and 10% of the male students are left handed. How many students in the laboratory are male students that are left handed

4 students

(2.00 x 10^2) x (2.00x 10^-4)=

4.00 x 10^-2

Perform the following mathematical operation. Express your answer to the proper number of significant figures [(2.1 x 10^6) x (8.49 x 10^-11) x (6.983 x 103)]/[4 x 10^14) x (7.02 x 10^9)]

4.56 x 10^10-

A calculator answer obtained from multiplying 21.08 x 1.9634 is 41.388472. The answer to the correct number of significant figures is ________.

41.39

Do the following calculation and express the answer using the correct scientific notation: (6.00x10^23)(3.00)/284

6.34 x 10^21

86.40/12.095=

7.143

Calculate the total number of electrons in the Lewis structure for the PH4+ ion

8

The number 9080000 written in scientific notation to the correct number of significant figures is ____________.

9.08 x 10^6

What is the mass 36.0 mL of liquid if density is 2.70 g/mL?

97.2 g

Which of the following ions is incorrectly named?

Ag+ Silver(I) ion

Chemical formula for Ag+ and CO3^2-

Ag2(Co3)

Chemical formula for arsenic tribromide

AsBr3

Chemical formula for As and Cl2

AsCl2

Which of the following compounds contains both ionic and molecular bond?

Barium acetate

Which of the following pairs is incorrectly matched?

CH4 polar covalent

What is the correct formula for the compound that forms when calcium and sulfur react?

CaS

Name for CaBr2

Calcium bromide

What is the formula for the ionic compound which forms when Co+3 combines with SO4 2-?

Co2 (So4)3

Which if the following names is paired with an incorrect formula?

Copper(II) oxide - Cu2 O

Which of the following pairs will form ionic bonds?

Cs, Br

Chemical formula for Cs and P4

Cs4 P4

Chemical formula for copper(II) sulfate

CuSO4

The "octet rule" relates to the number eight because ____________.

Electron arrangements involving 8 valence electrons are extremely stable

Which of the following is a nonpolar molecule containing polar bonds?

F-Be-F

Chemical formula for OH- and Fe+3

Fe(OH)3

Density is an easy way to distinguish between gold (density: approx. 19 g/cm^3) fools gold (density: approx. 4.5 g/cm^3) sand (density: approx. 2.5 g/cm^3) If a large golden rock has a mass of 252 g and a volume of 56 cm^3 which type of mineral is it?

Fools gold

Chemical formula for hyrdogen selenide

H2 Se

Chemical formula for phosphorous acid

H3 PO3

Which of the following is an acid?

H3 PO4

Which of the following molecules contains a covalent triple bond?

HCN

What is the correct formula of iodic acid?

HIO3

Chemical formula for nitrous acid

HNO2

Name for H2 SO3

Hydrogen sulfite

Which of the following contain three significant figures? I. 326.0 II. 0.00310 III. 46,900 IV. 1.070 V. 0.020

II. 0.00310 and III. 46,900

Which of the following can be classified as a mixture and not as a pure substance I. oxygen II. antifreeze III. distilled water IV. human blood V. brass alloy

II. antifreeze IV. human blood V. brass alloy

Which answer includes all of the following that are chemical changes I. The cutting of an iron bar into smaller pieces II. The solidification of mercury by cooling III. The dropping of iron into hydrochloric acid, producing hydrogen gas IV. The mixing of water and drinking alcohol V. the fermentation of grape juice

III. The dropping of iron into hydrochloric acid, producing hydrogen gas V. the fermentation of grape juice

is Al2(SO4)3 molecular or ionic

Ionic

is Ti2 O3 molecular or ionic

Ionic

Which if the following atoms can form an ion that has the same charge as the ammonium ion?

K (Potassium)

In which of the following sequences of fixed-charge ion are all of the ionic charges correct?

Li+, S2-, Ba2+

What compound has the -ite suffix in its name?

Li2 SO3

Chemical formula for magnesium acetate

Mg(C2 H3 O2)2

is HC2 H3 O2 molecular or ionic

Molecular

is HCN molecular or ionic

Molecular

is N4 S4 molecular or ionic

Molecular

Which of the following molecules is polar?

NCl3

Chemical formula for Ni+2 C2 H3 O2-

Ni(C2 H3 O2)2

Which of the following statements is true 1. 0.0206 2. 81.30 3. 29007 4. 123,000 5. 906.0 6. 300

Number with one significant figure is 6

Chemical formula for O2 and F2

OF2

Which atom is the most electronegative?

P

Which one of the following set contains species that are all isoelectronic?

P-3, S-2, Ar

A bond where the electrons are shared unequally is called ____________.

Polar covalent

Which atom is the least electronegative?

Rb

The chemical formula for heptasulfur dioxide is ____________.

S7 O2

Name for Ag2 SO4

Silver sulfate

Which of the following pairs has an errors in the formula or in the name?

SrCl ---> strontium chloride

What is the mass of gold (density= 19.3 g/cm^3) occupies the same volume as 80.0g of lithium (density= 0.534 g/cm^3)

Step 1: V= 80/0.534= 150cm^3 Step 2: M=19.3 cm^3 x 0.534 cm^3 M=2.89 x 10^3 g

Which of the following is an inexact number?

This card measures 3.1 inches x 4.2 inches

Chemical formula for zinc and sulfur

ZnS

Ionic compounds often contain____________.

both metallic and nonmetallic elements

Name of CaSo4

calcium sulfate

Name of Cr(OH)3

chromium (III) hydroxide

Which of the following is an element

copper

Which of the following is a compound

copper (II) oxide

Name for HI (g)

hydrogen iodide

What is the chemical name of Pb3(PO4)4?

lead(IV) phosphate

What is the molecular geometry of CO2?

linear

In the process of forming sodium nitrate, Na3 N, each sodium atom____________ electron(s) and each nitride atom____________ electron(s)

loses one; gains three

Name of Mg3N2

magnesium nitride

The Roman numeral (II) in the name nickel(II) fluoride indicates that____________.

nickle has a 2+ charge

Which of the following is an example of a heterogeneous mixture?

oil and vinegar

which of the following statements does not describe a physical property

sparks are created when sodium metal is added to water