Concept explainers
(a)
Interpretation:
The formula of compound in which the combining ratios are as follows:
Sodium: hydrogen: carbon: oxygen, 1:1:1:3.
Concept Introduction:
The substance having similar atom is called an element. When two or more elements combined together chemically they form a pure substance called a compound. But in case of mixture, it is formed when two substances joined together without any
(b)
Interpretation:
The formula of compound in which the combining ratios are as follows:
Carbon: hydrogen: oxygen, 2:6:1.
Concept Introduction:
The substance having similar atom is called an element. When two or more elements combined together chemically they form a pure substance called a compound. But in case of mixture, it is formed when two substances joined together without any chemical bonding. Example of compound is H2 O, and example of element is N, example of mixture is mixture of sand and sugar.
(c)
Interpretation:
The formula of compound in which the combining ratios are as follows:
Potassium: manganese: Oxygen, 1:1:4.
Concept Introduction:
The substance having similar atom is called an element. When two or more elements combined together chemically they form a pure substance called a compound. But in case of mixture, it is formed when two substances joined together without any chemical bonding. Example of compound is H2 O, and example of element is N, example of mixture is mixture of sand and sugar.
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Chapter 2 Solutions
Introduction to General, Organic and Biochemistry
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- Answer true or false. (a) Mendeleyev discovered that when elements are arranged in order of increasing atomic weight, certain sets of properties recur periodically.(b) Main-group elements are those in the columns 3A to 8A of the Periodic Table.(c) Nonmet.als are found at the top of the Periodic Table, metalloids in the middle, and metals at the bottom.(d) Among the US known elements,there are approximately equal numbers of metals and non metals.(e) A horizontal row in the Periodic Table is called a group.(f) The Group LA elements are called the "alkali metals"(g) The alkali metals react with water to give hydrogen gas and a metalhydroxide, MOH, where "M' is the metal."(h) The halogens are Group 7A elements.(i) The boiling points of noble gases (Group SA elements) increase goingfrom top to bottom of the column.arrow_forwardWrite the symbol for each of the following ions. (Enter your answer in the form A X q± Z .) (a) the ion with a 3+ charge, 28 electrons, and a mass number of 69 (b) the ion with 36 electrons, 35 protons, and 44 neutrons (c) the ion with 91 electrons, 148 neutrons, and a 4+ charge (d) the ion with a 2+ charge, atomic number 40, and mass number 90arrow_forwardWrite the formulas of the following compounds:(a) chlorine dioxide(b) dinitrogen tetraoxide(c) potassium phosphide(d) silver(I) sulfide(e) aluminum nitride(f) silicon dioxidearrow_forward
- v. Answer true or false. (a) Mendeleev discovered that, when elements are arranged in order of increasing atomic weight, certain sets of properties recur periodically. (b) Main-group elements are those in the columns 3A to 8A of the Periodic Table. (e) Nonmetals are found at the top of the Periodic Table, metalloids in the middle, and metals at the bottom. (d) Among the 116 known elements, there are approximately equal numbers of metals and nonmetals. (e) A horizontal row in the Periodic Table is called a group. () The Group 1A elements are called the "alkali metals." (g) The alkali metals react with water to give hydrogen gas and a metal hydroxide, MOH, where “M" is the metal. (h) The halogens are Group 7A elements. (1) The boiling points of noble gases (Group 8A elements) increase in going from top to bottom of the column.arrow_forwardWrite the formulas for the following compounds:(a) phosphorus pentachloride(b) dinitrogen monoxide(c) iodine heptafluoride(d) carbon tetrachloridearrow_forwardThe seven most abundant ions in seawater make up morethan 99% by mass of the dissolved compounds. They are listedin units of mg ion/kg seawater: chloride 18,980; sodium 10,560;sulfate 2650; magnesium 1270; calcium 400; potassium 380;hydrogen carbonate 140.(a) What is the mass % of each ion in seawater?(b) What percent of the total mass of ions is sodium ion?(c) How does the total mass % of alkaline earth metal ions com-pare with the total mass % of alkali metal ions?(d) Which makes up the larger mass fraction of dissolved com-ponents, anions or cations?arrow_forward
- 11. Write the symbol for each of the following ions: (a) the ion with a 1+ charge, atomic number 55, and mass number 133 (b) the ion with 54 electrons, 53 protons, and 74 neutrons (c) the ion with atomic number 15, mass number 31, and a 3- charge (d) the ion with 24 electrons, 30 neutrons, and a 3+ chargearrow_forward(a) Atoms are very small compared to objects on the macroscopic scale. The radius of a vanadium atom is 131 pm. What is this value in meters and in centimeters? cm (b) The mass of a single vanadium atom is 8.46×10-23 g. Suppose enough V atoms were lined up like beads on a string to span a distance of 44.7 cm ( 18 atoms inches). How many atoms would be required? What mass in grams of V would be used? Could you weigh out this amount of vanadium using a typical laboratory balance? (c) Taking the density of vanadium metal to be 6.08 g/cm³, calculate the mass of metal needed to form a piece of V wire with the same length as the distance in b, but with a diameter of 1.00 mm. Hint: The volume of a cylinder is T times its radius squared times its height. (V = T r² h) How many vanadium atoms does this represent? atomsarrow_forwardAn ion composed of which of these particles would havea mass of approximately 16 amu and a charge of 2-?(a) 8 protons and 8 electrons(b) 8 protons, 8 neutrons, and 10 electrons(c) 8 protons, 8 neutrons, and 8 electrons(d) 8 protons, 8 neutrons, and 6 electronsarrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning