What is the mass in grams of a sample of water when the temperature drops from \( 75.00^{\circ} \mathrm{C} \) to \( 56.00^{\circ} \mathrm{C} \) and 800.0 J of energy are lost? - Enter the answer with four significant figures. - Use \( 4.184 \frac{\mathrm{~J}}{\mathrm{~g}^{\circ} \mathrm{C}} \) for the specific heat of water. Provide your answer below:

Question 5 What is the pH of a solution, having the \( \mathrm{H}_{3} \mathrm{O}^{+} \)concentration of \( 7.06 \mathrm{e}-9 \mathrm{M} \) ? Add your answer

Este documento contiene entradas de lápiz, formas e imágenes que no son legibles en la vista para dispositi... \begin{tabular}{|l|l|l|l} 1. \( 2 p \) CONVERSIONES: Un hospital compra un frasco de alcohol isopropílico de 650 ml a \( \mathrm{S} / 0,60 \) para desinfección. Si la densidad del \\ alcohol es \( 0,75 \mathrm{~g} / \mathrm{cm}^{3} \) a temperatura ambiente, ¿cuál es el precio del alcohol por kilogramo? Equivalencia: \( 10^{3} \mathrm{~g}=1 \mathrm{~kg} \)\end{tabular}

Homework Questions Content Question 1 Using principles of molecular orbital theory, how many unpaired electrons are in each of the following molecules? NO \( { }^{+} \)Blank 1 NO Blank 2 BC Blank 3 BeC Blank 4

The pH value is an expression of the molarity of \( \mathrm{H}_{3} \mathrm{O}^{+} \)ions in solution. This concentration has strong impact on chemical reactions. The molarity is very small value, and therefore awkward to use. The pH scale simplifies this concentration making communication easier and faster. Demonstrate the relationship between pH and \( \mathrm{H}_{3} \mathrm{O}^{+} \)molarity, using the formula, \( \mathrm{pH}=-\log \left(\mathrm{H}_{3} \mathrm{O}^{+}\right) \) where () indicates concentration in molarity of a substance. What is the pH of a solution, having the \( \mathrm{H}_{3} \mathrm{O}^{+} \)concentration of 0.000491 M ? Add your answer

Extremes of pH can damage human tissues. Reflux is simply the effect of stomach acid damaging the esophagus. Several strong acids and bases can be found around the home. Lye is strong base used for a variety of purposes around a house. Lye can also damage tissues. What effect does lye have on pH ? A. Decrease pH B It does not change pH (C) Increase pH