How many oxygen atoms are found in a 33 g sample of manganese(III)nitrite? A. 2.06times 10^23 0 atoms 8 7 25 N Mn 16.00 14.01 54.94 B. 4.57times 10^23 0 atoms C. 5.10times 10^23 0 atoms D. 6.18times 10^23 O atoms E. . 7.42times 10^23 0 atoms

How many moles of sodium atoms are there in 4.4 grams of sodium carbonate? A. \$2.5\times 10^{22}\$ moles \begin{array}{|c|c|c|} \hline 6\ &\ 8\ &\ 11\ \\ C\ &\ 0\ &\ Ns\ \\ 12.01\ &\ 16.00\ &\ 23.00\ \\ \hline \end{array} B. \$5.0\times 10^{22}\$ moles C. 0.04 moles D. 0.08 moles E. 0.12 moles

Question 8 of 10 Why do metals conduct electricity? A. All covalent bonds conduct electricity. B. Metals never give up electrons. C. A lattice of ions allows valence electrons to move easily. D. The electrons in metals are inside the nuclei of the atoms.

A gas occupies 667.9 mL at a temperature of $26.4^{\circ }C$ What is the volume of gas at $122.87^{\circ }C$ assuming pressure did not change? Give your answer in L to the hundredths place. Do not put units in the answer space.

Consider the following compounds. Which is insoluble? $VI_{2}$ $HgBr_{2}$ ONaBr NaCl All of these None of these

Which of these reactions forms a precipitate as a product? $AlPO_{4}+3LiBr\rightarrow ??$ $FeCl_{2}+BeS\rightarrow ??$ $NaOH+NH_{4}ClO_{3}\rightarrow ??$ $K_{2}CO_{3}+2CsCH_{3}COO\rightarrow ??$

When $CuCl_{2}$ reacts with $NaNO_{3}$ , NaCl and $Cu(NO_{3})_{2}$ are produced as shown in the following balanced chemical equation. $CuCl_{2}+2NaNO_{3}\rightarrow 2NaCl+Cu(NO_{3})_{2}$ Suppose 19.35 g $CuCl_{2}$ reacts with 20.31 $NaNO_{3}$ Determine how many moles of $Cu(NO_{3})_{2}$ will be produced if 19.35 g $CuCl_{2}$ reacts with excess $NaNO_{3}$ The molar mass of $CuCl_{2}$ is $134.45g/mol$

6.2 g of an ionic compound is dissolved in a coffee-cup calorimeter containing 100.0 g of water at $16.2^{\circ }C$ The temperature of water increased to $19.5^{\circ }C$ What is the $\Delta H$ of the dissolution process in $kJ/mol$ of compound)? Assume that the specific heat of the solution is same as specific heat of water $(4.184$ $J/g^{\circ }C)$ The molar mass of the ionic compound is $72.1g/mol$

Which of the following is a proper use for a calorimeter? Multiple Choice measuring heat of combustion measuring temperature of a mixture measuring the amount of oxygen consumed in a combustion reaction measuring entropy of a reaction

Drag the tiles to the boxes to complete the pairs. Match the elements to their periodic table groups based on their uses or properties. \begin{array}{|c|c|} \hline\ Element\ is\ used\ as\ a\ disinfectant\ &\ \begin{array}{l}\ Element\ important\ for\ the\ proper\ \\ functioning\ of\ the\ human\ body. \end{array} \\ \hline Element always stored under oil. & \begin{array}{l}\ Compounds\ of\ this\ element\ are\ \\ used\ in\ manufacturing\ of\ paints. \end{array} \\ \hline group 3-12 & \\ \hline group 1 & \\ \hline group 17 & \\ \hline group 2 & \\ \hline \end{array}

Determine whether the sign of \$\Delta E\$ is positive or negative for each system. Drag the items into the appropriate bins. View Available Hint(s) \begin{array}{|l|l|l|} \hline\ \begin{array}{l}\ A\ draft\ is\ Paglimes\ \\ Bible\ for\ the\ \\ Reaganic \end{array} & \begin{array}{l}\ A\ detail\ and\ acid\ chemical\ mixture\ \\ is\ warmed\ with\ a\ hot\ plate.\ \\ (System:\ reaction\ mixture) \end{array} & \begin{array}{l}\ Ice\ in\ a\ glass\ of\ water\ melts,\ \\ cooling\ the\ water\ around\ it.\ \\ (System:\ melting\ ice) \end{array} \\ \hline Positive & & Negative \\ \hline \end{array}