exam1_review

exam1_review - In which of the following does nitrogen have...

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In which of the following does nitrogen have an oxidation state of +4? a) HNO 3 b) NO 2 c) N 2 O d) NH 4 Cl e) NaNO 2 Ans: b Which of the following reactions does not involve oxidation-reduction? a) CH 4 + 3O 2 2H 2 O + CO 2 b) Zn + 2HCl ZnCl 2 + H 2 c) 2Na + 2H 2 O 2NaOH + H 2 d) MnO 2 + 4HCl Cl 2 + 2H 2 O + MnCl 2 e) All are oxidation-reduction reactions. Ans: e With what volume of 5.00 M HF will 3.95 g of calcium hydroxide react completely, according to the following reaction? 2 2 2 2HF + Ca(OH) CaF + 2H O a) 10.7 mL b) 107 mL c) 533 mL d) 21.3 mL e) 46.9 mL Ans: d Sulfamic acid, HSO 3 NH 2 (molar mass = 97.1 g/mol), is a strong monoprotic acid that can be used to standardize a strong base: 3 2 2 2 2 HSO NH ( ) + KOH( ) KSO NH ( ) + H O( ) aq aq aq l A 0.177-g sample of HSO 3 NH 2 required 19.4 mL of an aqueous solution of KOH for a complete reaction. What is the molarity of the KOH solution? a)
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This document was uploaded on 10/30/2011 for the course CHEM 1307 at Texas Tech.

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exam1_review - In which of the following does nitrogen have...

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