Chemistry

Chemistry, 11.07.2019 03:30, kenzi352

Lars observes a substances to be solid and to float in water at room temperature 23 based on the given properties, which substances is the most likely identity of this sample

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Chemistry, 26.06.2019 01:00, small77

Lars observes a substance to be a solid and to float in water at room temperature (23°c). based on the given properties, which substance is the most likely identity of this sample? substance melting point (°c) boiling point (°c) density at room temperature (g/cm3) carbon tetrachloride -22.9 76.7 1.59 cetyl alcohol 49.3 344 0.811 dichlorobenzene 53.5 174 1.25 sulfur hexafluoride -64 -50.8 0.00617 a. carbon tetrachloride b. cetyl alcohol c. dichlorobenzene d. sulfur hexafluoride

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Chemistry, 29.06.2019 19:30, joejoefofana

Pure sodium metal explodes when it makes contact with water, and chlorine, in its natural state, is a deadly, poisonous gas. when these two chemicals combine, they form a harmless, white powder known as sodium chloride or table salt. which of the following statements does this information support? a. when substances are chemically combined, the properties of the new substances that are formed are often different from the properties of the original substances. b. heat must be added in order to change the chemical properties of substances. c. when substances are chemically combined, the properties of the new substances that are formed are the same as the properties of the original substances. d. the properties of substances change during chemical reactions but then later go back to their original condition.

Answers: 1

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Chemistry, 23.07.2019 19:00, J3ak06

Scientists at a food manufacturing company compare the properties of substances for use in flavoring frozen yogurt. they prepare this list of questions to test the substances. i. which substances are solids at room temperature? ii. which substances have the most pleasing taste? iii. which substances most quickly dissolve in water? iv. which substances would best flavor the frozen yogurt? which of the following questions can be answered through science? (2 points) questions ii and iii only questions ii and iv only questions i and iii only questions i and ii only

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Chemistry, 17.10.2019 04:30, jnsoccerboy3121

The element sodium (na) is a soft solid that will react explosively with water. the element chlorine (cl) is a toxic gas. when these two elements combine, they produce a stable, crystalline solid known commonly as table salt (nacl). how would you explain this? select one: when substances combine to form new substances, the properties of the reactants are preserved. when substances combine to form new substances, the properties of the resulting substances will be different than those of the reactants. sodium and chlorine become different elements during the reaction. the properties of each of the two original elements are combined to give salt its properties.

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