4.2 Write the symbols for the following elements: a. oxygen b. lithium c. uranium d. titanium e. hydrogen f. chromium g. tin h. gold

Strong bases dissociate only slightly in water. True False

Which value gives the number of particles in 1 mol of a-subsiance? $6.02\times 10^{21}$ $6.02\times 10^{22}$ $6.02\times 10^{23}$ $6.02\times 10^{24}$

Combustion reactions produce heat and often release carbon dioxide and water when burning hydrocarbons. True False

Which of these drinks contain the most alcohol? A 12 ounce beer A 5 ounce glass of wine They all contain equal amounts of alcohol A 1.5 ounce shot of 80 proof whiskey

Which functional group can accept or release protons $(H^{+})$ depending on pH? carboxylic acid group hydroxyl group amino group phosphate group

Which type of reaction is shown here: $2H_{2}O_{2}\rightarrow 2H_{2}O+O_{2}$ Multiple Choice synthesis reaction decomposition reaction exchange reaction anabolic reaction

Which of the following defines the atomic number of a given element? The number of protons neutrons, and electrons in an atom of a given element The number of protons in the atomic nucleus The number of electrons in an atom of a given element The number of protons and neutrons in the atomic nucleus

Use the balanced equation, $4Al+3O_{2}\rightarrow 2Al_{2}O_{3}$ to answer the following question. How many grams of $O_{2}$ are needed to react completely with 14.3 g of Al? Be sure your answer has the correct number of significant figures. $\square $ g $O_{2}$

Identify the spectator ions for the reaction between calcium nitrate and sodium sulfate The balanced molecular equation is $Ca(NO_{3})_{2}(aq)+Na_{2}SO_{4}(aq)\rightarrow CaSO_{4}(s)+2Na$ NO3 (aq) $Ca^{2+}$ and $NO_{3}^{-}$ $Na^{+}$ and $NO_{3}^{-}$ $Na^{+}$ and $SO_{4}^{2-}$ $Ca^{2+}$ and $SO_{4}^{2-}$

When this equation is balanced, the coefficient in front of $AlCl_{3}$ is __ $\underline {\quad }KCl+\underline {\quad }Al_{2}(SO_{4})_{3}\rightarrow \underline {\quad }K_{2}SO_{4}+\underline {\quad }AlCl_{3}$ 3 1 2 6