Chemistry Questions & Answers

2. Complete las siguientes ecuaciones a. Metano + cloro \( \frac{\text { luz }}{\text { b. Acido Butanoico }+\mathrm{HNO} 3} \mathrm{OHNO2} \) ? c. Pentanol + O2 (exceso) ?

In Exercises \( 13-16 \), use the following information. Negative ions, designated by the notation \( \left[\mathrm{OH}^{-}\right] \), are always present in any acid or base. The concentration, \( \left[\mathrm{OH}^{-}\right] \), of these ions is related to \( \left[\mathrm{H}^{+}\right] \)by the equation \( \left[\mathrm{OH}^{-}\right] \cdot\left[\mathrm{H}^{+}\right]=10^{-14} \) moles per liter. Find the concentrations of \( \left[\mathrm{OH}^{-}\right] \)and \( \left[\mathrm{H}^{+}\right] \)in moles per liter for the substances with the following pH values. 13. \( \mathrm{pH}=6 \) 14. \( \mathrm{pH}=8 \) 15. \( \mathrm{pH}=9.5 \)

11. \( \left[\mathrm{H}^{+}\right]=2.3 \times 10^{-5} \)

\( H _ { 2 } SO _ { 4 } + NaOH \xrightarrow [ I ] { \rightarrow } Na _ { 2 } SO _ { 4 } + H _ { 2 } O \)

Calculate the pH at \( 25^{\circ} \mathrm{C} \) of a 0.52 M solution of anilinium chloride \( \left(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{3} \mathrm{Cl}\right) \). Note that aniline \( \left(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}\right) \) is a weak base with a \( p K_{b} \) of 4.87 . Round your answer to 1 decimal place.

Question 1 Which of the following is the correct Lewis Dot Structure for \( \mathrm{SCl}_{4} \) ? ..

(1) Se inicia con una sin. de 100 Molar y se realizan 3 diluciones seriadas cada una con un f.o. 1/10. Cuäl sera la [Ifinal?

How do you determine the correct coefficients to balance a chemical equation? \[ \text { Reply I Like I Mark as Unread } \]

What initial volume of a \( 15 \%(\mathrm{~m} / \mathrm{v}) \) mannose solution is needed to prepare 125 mL of a \( 3.0 \% \) \( (\mathrm{~m} / \mathrm{v}) \) mannose solution?

(c) Metals have a metallic bond. (1) Describe metallic bonding in sodium metal.