Concept explainers
(a)
Interpretation:
Whether calcium chloride is a pure substance or not is to be explained.
Concept introduction:
A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.
An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not
(b)
Interpretation:
Whether the octatomic molecule of sulfur is a pure substance or not is to be determined.
Concept introduction:
A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.
An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.
(c)
Interpretation:
Whether baking powder composed of
Concept introduction:
A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.
An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.
(d)
Interpretation:
Whether cytosine, a component of DNA consisting of H, C, N and O atoms bonded in a specific arrangement, is a pure substance or not, is to be determined.
Concept introduction:
A substance composed of only one kind of an element or a compound can be defined as a pure substance. A pure substance has a uniform composition and properties in all the parts. A compound which is chemically pure has a specific melting and boiling point.
An impure substance is a mixture of two or more different elements or compounds or elements and compound. It has no definite composition and properties. The constituents are not chemically bonded to one another.
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CHEMISTRY:MOLECULAR...(LL) W/ALEKS
- Show work with explanation needed. don't give Ai generated solutionarrow_forwardShow work with explanation needed. Don't give Ai generated solutionarrow_forward7. Calculate the following for a 1.50 M Ca(OH)2 solution. a. The concentration of hydroxide, [OH-] b. The concentration of hydronium, [H3O+] c. The pOH d. The pHarrow_forward
- A first order reaction is 46.0% complete at the end of 59.0 minutes. What is the value of k? What is the half-life for this reaction? HOW DO WE GET THERE? The integrated rate law will be used to determine the value of k. In [A] [A]。 = = -kt What is the value of [A] [A]。 when the reaction is 46.0% complete?arrow_forward3. Provide the missing compounds or reagents. 1. H,NNH КОН 4 EN MN. 1. HBUCK = 8 хно Panely prowseful kanti-chuprccant fad, winddively, can lead to the crading of deduc din-willed, tica, The that chemooices in redimi Грин. " like (for alongan Ridovi MN نيا . 2. Cl -BuO 1. NUH 2.A A -BuOK THE CF,00,H Ex 5)arrow_forward2. Write a complete mechanism for the reaction shown below. NaOCH LOCH₁ O₂N NO2 CH₂OH, 20 °C O₂N NO2arrow_forward
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