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Questions in chemistry

[Terjawab] List 5 objects/materials found in the kitchen, bathroom, living room, and classroom. Classify each material as SOLID, LIQUID, or GAS. | Place (Designated area to visit) | Name of Matter | Classification | |---|---|---| | KITCHEN | 1. | | | | 2. | | | | 3. | | | | 4. | | | | 5. | | | BATHROOM | 1. | | | | 2. | | | | 3. | | | | 4. | | | | 5. | | | LIVING ROOM | 1. | | | | 2. | | | | 3. | | | | 4. | | | | 5. | | | CLASSROOM | 1. | | | | 2. | | | | 3. | | | | 4. | | | | 5. | |

[Terjawab] What else is produced during the replacement reaction of silver nitrate and potassium sulfate? [tex]2 AgNO_3+K_2 SO_4 \rightarrow Ag_2 SO_4 +[/tex] A. [tex]KNO _3[/tex] B. [tex]2 KNO _3[/tex] C. [tex]K _2[/tex] D. [tex]2 AgNO _3[/tex]

[Terjawab] Therefore, who can describe the properties of solids, liquids, and gases in terms of shape and volume?

[Terjawab] Select the correct answer from each drop-down menu. What effect does a decrease in the concentration of nitrogen monoxide (NO) gas have on the rate of reaction in this chemical equation? [tex]2 NO(g)+H_2(g) \rightarrow N_2 O(g)+H_2 O(g)[/tex] A decrease in the concentration of nitrogen monoxide [dropdown] between NO and [tex]H _2[/tex] molecules. The rate of the forward reaction then [dropdown].

[Terjawab] Which of the following represents a pair of isotopes? A. $O _2, O _3$ B. ${ }_6^{14} C ,{ }_7^{14} N$ C. all are pairs of isotopes D. ${ }_1^1 H ,{ }_1^2 H$ E. ${ }_{16}^{32} s,{ }_{16}^{32} s^{-2}$

[Terjawab] 4.1 What leads to the formation of new substances during chemical reactions? 4.2 Do you agree with the following statements? Justify your answers. (a) A change can be either physical or chemical but can never be both. (b) All kinds of changes involve chemical reactions.

[Terjawab] Consider the following intermediate chemical equations: [tex] \begin{array}{l} C(s)+\frac{1}{2} O_2(g) \rightarrow CO(g) \\ CO(g)+\frac{1}{2} O_2(g) \rightarrow CO_2(g) \end{array} [/tex] When you form the final chemical equation, what should you do with CO? A. Cancel out CO because it appears as a reactant in one intermediate reaction and a product in the other intermediate reaction. B. Add the two CO molecules together and write them as reactants in the final chemical reaction. C. Write CO only once as a reactant in the final chemical reaction. D. Write CO as a reactant and a product in the final chemical reaction.

[Terjawab] Which molecule is a stereoisomer of trans-2-butene? A. B. C. D.

[Terjawab] Consider the reaction below. [tex]$C_2 H_4(g)+H_2(g) \rightarrow C_2 H_6(g)$[/tex] Which change would likely cause the greatest increase in the rate of the reaction? A. decrease temperature and decrease pressure B. increase temperature and decrease pressure C. decrease temperature and increase pressure D. increase temperature and increase pressure

[Terjawab] The table describes the properties of four compounds. | Property | A | B | C | D | | ----------------------------- | ---- | ------------------ | --- | ---- | | Melting point | High | | Low | High | | Boiling point | High | Low | Low | High | | Does the compound dissolve in water? | Yes | Yes | Yes | Yes | | Can the compound conduct electricity? | Yes | Yes, but poorly. | No | Yes | Which compounds are most likely ionic? A. compounds A and B B. compounds B and C