4. Which of the following is a chemical change? freezing liquid mercury evaporation of water sublimation of iodine combustion of liquified petroleum gas

A solution contains 0.018 moles each of $I',Br''$ and $Cl^{-}$ When the solution is mixed with 200 mL of $0.24MAgNO_{3},$ how much $AgCl(s)$ precipitates out? $KspAgI=1.5\times 10^{-16}$ $Ksp\quad AgBr=5.0\times 10^{-13}$ $Ksp\quad AgCl=1.6\times 10^{-10}$ 2.6g 3.3 g 0.0 g 1.7 g 5.0 g

What is the empirical formula for a molecule containing $86\% $ C and $14\% $ H? $CH_{2}$ $CH_{8}$ $C_{3}H_{7}$ $C_{7}H_{16}$

Is this an example of an Exothermic or Endothermic situation? lonic bonds Exothermic Endothermic

(48) A gas has a solubility in water at $0^{\circ }C$ of $3.6g/L$ at a pressure of 1.0 atm.What pressure is needed to produce an aqueous solution containing $9.5g/L$ of the same gas at $0^{\circ }C$

2. What is the result of atoms following the octet rule? a. They react and become a new element b. They always have 8 electrons c. They always have 8 valence electrons d. Their stability is increased

When the equations $Na+O_{2}\rightarrow Na_{2}O$ is balanced the coefficient for $O_{2}$ is 1 2 3 4

What is the name of $P_{2}O_{5}$ Diphosphorus pentoxide Phosphorus pentoxide Phosphorus dioxide Diphosphorus oxide

6. A sample of silver has a mass of 10.5g. What is its volume?

The formula for pH is $pH=-log[H^{+}]$ where $[H^{+}]$ is the hydrogen ion concentration. The hydrogen lon concentration, $[H^{+}]$ In a certain brand of fresh-brewed coffee is $[H^{+}]=1.3\times 10^{-5}$ . What is the pH of the product, to the nearest tenth? The pH of the coffee is $\square $ (Round to the nearest tenth as needed.)

Name the following Compounds (use your flow charty - LIOH - AgBr - Clif