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Questions in chemistry

[Terjawab] Which state of matter has no definite shape or volume and expands to fill its container completely? A. solid B. liquid C. gas

[Terjawab] Give the definition of heat of neutralization.

[Terjawab] The initial pH of distilled water is close to 1 (highly acidic). True or False

[Terjawab] Who is responsible for providing and maintaining Safety Data Sheets, or SDSs, for all hazardous chemicals in your workplace? A. Your supervisor B. Your employer C. The chemical supplier D. All of the above

[Terjawab] 3. Write an equation for the neutralization of HBr by KOH. $HBr(aq)+KOH(aq) \rightarrow KBr(aq)+H_2 O(1)$ 4. What is the function of an indicator in a titration?

[Terjawab] Which of the Lewis electron dot representations is correct for the cyanide ion, CN⁻¹? [C=N]⁻¹ [C≡N]⁻¹

[Terjawab] Which of the Lewis electron dot representations is correct for perchlorate, [tex]$ClO _4^{-}$[/tex]?

[Terjawab] A chemist fills a reaction vessel with 0.536 g aluminum hydroxide $\left( Al ( OH )_3\right)$ solid, 0.337 M aluminum $\left( Al ^{3+}\right)$ aqueous solution, and 0.196 M hydroxide $\left( OH ^{-}\right)$aqueous solution at a temperature of $25.0^{\circ} C$. Under these conditions, calculate the reaction free energy $\Delta G$ for the following chemical reaction: $Al(OH)_3(s) \rightharpoonup Al^{3+}(aq)+3 OH^{-}(aq)$ Use the thermodynamic information in the ALEKS Data tab. Round your answer to the nearest kilojoule.

[Terjawab] Which property do metalloids share with nonmetals? A. Both are gases at room temperature. B. Both can react to form acidic compounds. C. Both are very poor electrical conductors. D. Both can be pounded into thin sheets.

[Terjawab] Complete the table below by writing the symbols for the cation and anion that make up each ionic compound. The first row has been completed for you. | Ionic compound | cation | anion | | -------------- | ------ | ----- | | NaCl | $Na { }^{+}$ | $Cl ^{-}$ | | $V _2( SO _4)_3$ | | | | $VF _2$ | | | | $Fe ( NO _3)_3$ | | | | $NH _4 I$ | | |