Concept explainers
The properties of a compound are often different from the properties of the elements, this should be explained using water as an example.
Concept Introduction:: In the physical change, the material or substance will not change its chemical identity only changes its physical state like solid into liquid or liquid into gas. For example, water changes its physical sate when ice melts into water.
In the chemical change, the material or substance will change its chemical identity means there is a new substance formed by the formation heat, energy or gas. For example: hydrogen and oxygen react to form water which is a new substance.
A pure substance is composed of two or more type of matter in definite proportion. For examples; ammonia which is composed by hydrogen and oxygen in definite proportion etc
Homogeneous mixture is a type of solution where its component means solute and solvent are
present as uniform and not visible.
Heterogeneous mixture is the type of mixture where the composition of substance is not uniform and the component of mixture also visible.
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Introductory Chemistry: A Foundation
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- If you take one teaspoon of salt and dissolve it in one cup of water, what would that look like? Sketch in structural formulas of the molecules/ compounds involved.arrow_forward1. What are the differences and similarities between an ionic compound and a molecule? Include examples of each. 2. Circle the ionic compounds: NaOH CaClz 2 MgO HBr CHs 3. Why do some metal ions have variable charges and other metals have fixed charges? Where are the variable charged metals found on the periodic table? 4. Write the individual ions that react to form the following ionic compounds and name the compounds formed. Include charge on each ion. Ion 2CF →FeCl2 Ion Fe Compound Name (Use roman numeral naming transition elements) Iron (1I) Chloride Example: → NazSO4 a. b. → CUSO; с. → NH&Br d. → Cu2S 5. Write the formulas for the following ionic compounds. a. Lithium phosphate b. Titanium (II) sulfide c. Calcium Chloride d. Manganese (IV) sulfate e. Barium nitrate f. Magnesium hydroxidearrow_forwardIdentify the following two compounds as either COVALENT or IONIC: a) tetraphosphorous tetrasulfide b) potassium sulfide Cite ONE example of evidence that the name provides which allows you to classify them in this way. Don't mention the non-metal, metal portion. Look closely at those names. What does tetra mean? use the image attached to help.arrow_forward
- What is atom? molecule? compounds? definition, structure and examples? The structure of atoms?arrow_forwardings ools Molecular compounds are usually composed solely of nonmetals. A binary molecular compound is one in which the compound contains only two elements (regardless of how many atoms are present of each). When naming binary molecular compounds, prefixes are used to specify the number of atoms of each element. Take a moment to review some of the prefixes shown here. Prefix Number mono di nona one three tetra four penta five hexa six hepta seven octa eight nine deca two ten For example, SF6 is named sulfur hexafluoride. Note that the prefix mono is not used in naming the first element. Also note that the second element in the name should end with the suffix ide. ▼ Part A Using the rules for naming molecular compounds described in the introduction, what is the name for the compound PC15? Spell out the full name of the compound. ►View Available Hint(s) Submit Part B Using the rules for naming molecular compounds described in the introduction, what is the name for the compound N₂ CL?…arrow_forwardPhysical properties are: those that a substance displays only through changing its composition. identical for all solid matter. those that a substance displays without changing its composition. those that cause atoms and molecules to change. none of the abovearrow_forward
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