This 10-question practice test deals with finding the molecular formula of chemical compounds. Then calculate the ratios of different types of atoms.
Naming Worksheets Naming Compounds Worksheet Chemistry Lessons Chemistry Worksheets
Well start from the very beginning as these chemical names and formulas are a great way to start learning chemistry.
. C hem gu id e q u e s tio n s NAMING ORGANIC COMPOUNDS. Binary Molecular Compounds Binary molecular compounds consist of two nonmetals. The number 6 refers to the atomic number c.
These questions cover all the compounds on this pageIf you are doing this sensibly you will only be looking at one or two types of compounds at a time. Ionic or Covalent Compound Name 21 CdBr 2 22 CrCr 2O 7 3 23 SBr 2 24 NH 4 2CrO 4 25 CuO 26 Pt 3PO 3 4 27 AlClO 4 3 28. Calculate the empirical formula of a compound that is 856 C and 144 H by mass.
Name of Ionic Compound. C is the elemental form of carbon. The molecular weight is 2282 gmol.
The formula is known to contain the NH 4 grouping. A molecular orbital MO. 849 Hg and the remainder Cl with a molecular weight of 4722 gmol.
How many protons and neutrons are in the second isotope. The units for molar mass are therefore gramsmole. 1226 N 354 H 281 S and 561 O.
Chemical Formula Type of Compound. Percent Composition and Molecular Formula Worksheet Key 1. The molecular mass or molecular weight of a compound measured in atomic mass units amu is obtained by adding up the atomic masses of all of the atoms present within a unit of the substance.
Fe is the elemental form of iron. A periodic table will be required to complete this test. Worksheet 13 - Molecular Shapes The shapes of molecules can be predicted from their Lewis structures by using the VSEPR Valence Shell Electron Pair Repulsion model which states that electron pairs around a central atoms will assume a geometry that keeps them as far apart from each other as possible.
Here are three isotopes of an element. Answers appear after the final question. Solutions for the Naming Ionic Compounds Practice Worksheet 1 ammonium chloride 2 iron III nitrate 3 titanium III bromide 4 copper I phosphide 5 tin IV selenide 6 gallium arsenide 7 lead IV sulfate 8 beryllium bicarbonate 9 manganese III sulfite 10 aluminum cyanide 11 CrPO 4 2 12 VCO 3 2 13 SnNO 2 2 14 Co 2 O 3.
A compound is a substance that has two or more chemical elements whose atoms are bonded together. The numbers 12 13 and 14 refer to the mass number d. Ionic Compound Examples.
Calculating Empirical Molecular Formulas 1. In other words it tells you the number of grams per mole of a compound. How many protons and neutrons are in the first isotope.
This is an unusual property for a chemical compound. Use this naming ionic compounds worksheet answers provided to quickly learn important chemical names and formulas. The empirical formula mass for this compound is approximately 30 amu the sum of 12 amu for one C atom 2 amu for two H atoms and 16 amu for one O atom.
Write your formula accordingly. Molecular acids cations and anions. Whats the empirical formula of a molecule containing 655 carbon 55 hydrogen and 290 oxygen.
The prefixes in the name of a binary molecular compound show the number of atoms of each element in a molecule of the compound. Isotope Practice Worksheet 1. Nomenclature a collection of rules for naming things is important in science and in many other situationsThis module describes an approach that is used to name simple ionic and molecular compounds such as NaCl CaCO 3 and N 2 O 4The simplest of these are binary compounds those containing only two elements but we will also consider how to name ionic compounds containing.
If the molar mass of the compound in problem 1 is 110 gramsmole whats the molecular formula. Where electrons are most likely to be found specific energy and general shape in a molecule Additive combination bonding MO is lower in energy Subtractive combination antibonding MO is higher energy 111 Describing Chemical Bonds. The molar mass of a compound tells you the mass of 1 mole of that substance.
Simple Binary Ionic Compounds Please complete the following table. For ionic compounds the term formula mass or formula weight is used instead since there arent really any molecules present. What is the longest chain incorporating both carbons of the double bond.
In addition to table salt NaCl there are many common ionic compounds encountered in everyday life. Formula of Ionic Compound s 2. There are 4 exercises to practice plus complete instructions in the 5 page packet.
Give the IUPAC name for this compound. Computing Molecular Mass for a Covalent Compound Ibuprofen C 13 H 18 O 2 is a covalent compound and the active ingredient in several popular nonprescription pain medications such as Advil and MotrinWhat is the molecular mass amu for this compound. Mole of a compound contains Avogadros number 6022 x 1023 of molecules molecular compound or formula units ionic compound.
The molecular formula of a compound is a representation of the number and type of elements present in one molecular unit of the compound. Solution Molecules of this compound are comprised of 13 carbon atoms 18 hydrogen atoms and 2 oxygen atoms. 253 recall that a hydrocarbon is a compoundmolecule consisting of hydrogen and carbon only.
You will receive your score and answers at. Molecular geometry studies the three-dimensional shapes. How many substituents are on this chain.
The numbers related to the prefixes are used as subscripts when writing formulas of binary molecular compounds. If the compounds molecular mass is determined to be 180 amu this indicates that molecules of this compound contain six times the number of atoms represented in the empirical formula. 254 recall the general formula of the alkanes and the molecular formula structural formula and state at room temperature and pressure of methane ethane propane and butane.
The empirical formula for the compound having the formula H2C2O4 is A C2H2 B CO2H C COH D C2O4H2 E COH2 2. These types of compounds have different properties and different chemical makeups but they are the categories that describe the potentially millions of different chemical compounds. Then use the correct naming rules to write the correct names for each compound.
FeC13 is a compound formed from the elements iron and chlorine Reviewing the Model 1. 6 12C 6 13C 6 14C a. To find the empirical formula analyze samples to identify the percent composition.
Review the definitions for an element and a compound. This is illustrated by the drawings below. How many carbon atoms are in the longest chain ignoring the double bond.
C12 is the elemental form of chlorine. Determine the molecular formula for each compound whose percentage composition is shown below. C 3 H 3 O mass 55 gmole 2.
Molecules are also referred to as molecular compounds. Ionic Covalent Compound Naming First identify whether these compounds are ionic or covalent. What is the molecular formula of this compound.
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