Which of the following equations represent a physical change? Check all that apply. KBr(s)arrow K^+(aq)+Br^-(aq) H_(2)O(s)arrow H_(2)O(l) 2H_(2)(g)+O_(2)(g)arrow 2H_(2)O(g) None of the above

Bodies of water tend to moderate climate because __ water is always cooler than the nearby landmasses the hydrogen bonding in water causes it to be cohesive All of the listed responses are correct. water has a high heat of vaporization the hydrogen bonding in water gives it a high specific heat IDON'T KNOWYET

Calculate the value of $E^{\circ }$ and $\Delta G^{\circ }$ for the following reaction. $2Fe^{2+}(aq)+Br_{2}(aq)\rightleftharpoons 2Fe^{3+}(aq)+2Br^{-}(aq)$ $K=4.85\times 10^{10}$

Valence bond theory describes covalent bonds as the overlap of half-filled orbitals with electron pairs localized between two bonded atoms uses a combination of atomic orbitals to create molecular orbitals with electrons delocalized throughout the entire molecule creates bonding and anti -bonding interactions based on which orbitals are filled correctly predicts paramagnetism in molecules

Question 22 (8 points) Match each orbital type with the maximum number of orbitals possible: $\square $ porbital $\square $ d orbital $\square $ forbital $\square $ s orbital 1. 1 2. 3 3. 7 4. 5 5. 9

The reaction of 0 .194 g of Zn with HCl(aq) gave 80.3 mL (at $23.4^{\circ }C$ of hydrogen gas collected over water in a gas tube. The water was 18.5 mm higher in the gas tube than it was in the beaker. The barometer reading is 698. mm Hg. Following the steps on pages 1 to 3, complete this table of data. Volume of $H_{2}$ Gas Generated (mL) $\square $

What is the term for the product that results from hydrocarbons that react with other chemicals and sunlight? gaseous emissions photochemical smog carbon monoxide particulate matter

Predict the sign of $\Delta S$ for the following process. $2NO(g)+O_{2}(g)\rightarrow 2NO_{2}(g)$ A. $\lt 0$ B. $\gt 0$ C. $=0$

Calculate the $\Delta H$ for the reaction $NO_{(g)}+O_{(g)}\rightarrow NO_{2(g)}$ Given the following information:Eq $1:NO_{(g)}+O_{3(g)}\rightarrow NO_{2(g)}+O_{2(g)}$ $\Delta H=-198.9kJ/mol$ Eq 2: $O_{3(g)}\rightarrow 3/2O_{2(g)}$ $\Delta H=-142.3kJ/mol$ Eq 3: $O_{2(g)}\rightarrow 2O_{(g)}$ $\Delta H=495.0kJ/mol$

Classify the following chemicals by type of particle: carbon ion non metal atom formula unit molecule

Match each process with whether it is endothermic or exothermic: $\square $ A candle flame 2 $\square $ The freezing of water $\square $ v The combustion of butane $\square $ v Photosynthesis $\square $ pack used for injuries The chemical reaction in a cold $\square $ The vaporization of rubbing alcohol 1. Endothermic 2. Exothermic