Which combination ot elements forms crystalline solids that will dissolve in wat
ID: 999920 • Letter: W
Question
Which combination ot elements forms crystalline solids that will dissolve in water, producing a solution of ions that conduct an electric current? metal and metal and nonmetal and nonmetal All of the above are correct. A chemical equation is balanced by changing (the) subscripts. superscripts. coefficients. any of the above as necessary to achieve a balance. Since wood is composed of carbohydrates, you should expect what gases to exhaust from a fireplace when complete combustion takes place? carbon dioxide, carbon monoxide, and pollutants carbon dioxide and water vapor carbon monoxide and smoke It depends on the type of wood being burned.Explanation / Answer
Answer 5.
Correct option is b. metal and nonmetal
Combination of metal and non metal elements forms crystalline solids that dissolve in water giving ions which conduct electricity. For ex. NaCl. Na is metal and Cl is non metal. NaCl dissolves in water giving Na+ ions and Cl- ions.
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Answer 6.
Correct option is c. –ide
Suffix –ide is used for naming inorganic compounds made up of only two different elements. For ex. KCl-potassium chloride; NaCl – sodium chloride
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Answer 7.
Correct option is b. water
Molecular formula of water is H2O ie. Dihydrogen monoxide.
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Answer 8.
Correct option is c. coefficients.
Only coefficients are changed to balance chemical equation. Changing subscript or superscript will result in change in chemical entity, hence it will not help in balancing equation.
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Answer 9.
Correct option is b. carbon dioxide and water vapor.
Carbohydrate consists of carbon, hydrogen and oxygen. Therfore, complete combustion of carbohydrate will result in formation of CO2 and H2O vapors.
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