Chemistry study guide for test 8

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What is the ending for the names of all binary compounds, both ionic and molecular

-ide

How many moles are present in 21.2 g hydrochloric acid

0.582 mol

How many single covalent bonds can halogens have

1

How many molecules are in 2.10 mol CO2

1.26 x 10^24 molecules

Which is the correct molar mass for the compound iron 2 sulfate

151.85g/mol

Which is the percent composition of phosphorus in zinc phosphate

16.1%

How many grams of phosphorus are in 500 grams of calcium phosphide

170.1 grams

How many valence electrons does helium Atom have

2

What is the charge on a strontium Ion

2+

What is the percent composition of chromium in BaCrO4

20.5%

What is the mass of 2.25 moles of sulfuric acid

220g

How many hydrogen atoms are in 5 molecules of isopropyl alcohol, C3H7O

35

A sample of Magnese two chloride has a mass of 19.8 g before heating and 12.6 g after heating until all the water is driven out. Based on this information how many water molecules are attached to each molecule of Magnis two chloride

4

How many atoms are in 0.075 mol of titanium

4.5 x 10^22

Which is the molar mass of the element calcium

40.078 g/mol

Which is The mass of eight moles of sodium chloride

468 grams

How many valence electrons are in an atom of phosphorus

5

What is the mass in grams of 5.90 mol C8H18

673 g

What is the molar mass of calcium hydroxide

74.092 g/mol

Which is the percent composition of bromine in the compound sodium bromide

77.7%

How many moles of tungsten atoms are in 4.8 x 10^25

8.0 x 10^1 moles

What is the percent composition of carbon in heptane C7H16

84%

What is the molar mass of (NH4)2CO3

96g

And ionic bond is a bond between

A cation and an anion

An -ate or -ite at the end of a compound name usually indicates that the compound contains

A polyatomic anion

What is the formula unit of aluminum oxide

Al2O3

Which two are isotopes of one another

Atoms 1 and 4

Which is not a diatomic molecule

Boron

The name of a hydrate is calcium chloride dihydrate. What is the formula

CaCl2.2H2O

How are chemical formulas of binary ionic compounds generally written

Cation on the left anion on the right

A molecule with a single covalent bond is

Cl2

What is the correct name for the compound CoCl2

Cobalt (II)chloride

Which of the following is the correct name for N2O5

Dinitrogen pentoxide

A depiction of valence electrons around the symbol of an element

Electron dot structure

What does an -ite or -ate ending in a polytomic ion mean

Oxygen is in the formula

Which of the following compounds contains the lead (II) ion

PbO

Which term is described as the percent by mass of any element in a conpound

Percent composition

Which element has a molar mass of 30.974 g/mol

Phosphorus

In naming a binary molecular compound, the number of atoms of each element present in the molecule is indicated by

Prefixes

Which has a charge of +1

Proton

When naming a transition metal ion that can have more than one common ionic charge, the numerical value of the charge is indicated by a

Roman numeral Following the name

Select the correct formula for sulfur hexafluride

SF6

Which of the following formulas represents a molecular compound

SO2

A compound held together by ionic bonds is called a

Salt

Which type of bond has one pair of electrons shared between atoms

Single covalent

In which of the following is the name and formula given correctly

Stannic fluoride SnF4

What is shown by the structural formula of a molecule or polyatomic ion

The arrangement of bonded atoms

Which elements can form diatomic molecules joined by a single covalent bond

Hydrogen and the halogens only

Which is the correct name for the hydrate whose composition is shown

Iron (III) phosphate tetrahydrate

How does calcium obey the octet rule when reacting to form compounds

It gives up electrons

Which element, when combined with fluorine, would mostly likely form an ionic compund

Lithium

The mass of a mole of NaCl is the

Molar mass

Avogadro's number of representative particles is equal to one

Mole

What SI unit is used to measure the number of representatives particles in a substance

Mole

What is the SI base unit used to measure the amount of a substance

Mole

What is the formula for sodium sulfate

Na2SO4

What is the formula unit of sodium nitride

Na3N

Which of these elements does not exist as a diatomic molecule

Ne

What is the correct name for the N3- ion

Nitride ion

Which of the following is the name given to the pairs of valence electrons that do not participate in bonding in diatomic oxygen molecules

Non bonding pair/unshared

Which of the following correctly shows a prefix used in naming binary molecular compounds with its corresponding number

Nona- 9

Which of the following diatomic molecules is joined by double covalent bond

O2

Atoms react so as to acquire the stable electron structure of noble gas

Octet rule

What is true about the molar mass of chlorine gas

The molar mass is 71.0 g

What is the correct name for Sn3(PO4)2

Tin (II)phosphate

Which set of chemical name and chemical formula for the same compound is correct

Tin (IV) bromide SnBr4

Molecular compounds are usually

Two or more nonmetallic elements

An electron in the highest occupied energy level of an atom

Valence electron

What is the name given to the electrons in the highest occupied energy level of an Atom

Valence electrons


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