Pb or Po Pb Po The larger atom cannot be determined based on periodic properties. They are the same size.

How many moles are there in 3.50 g of ethanol, $CH_{3}CH_{2}OH$ 161 mol 0.00621 mol 13.1 mol 0.0761 mol

The addition of an acid to water increases the $[H_{3}O^{+}]$ of the solution and increases the solution pH. True or False True False

Which one of the following is most soluble in hexane $(C_{6}H_{14})$ $CH_{3}CH_{2}OH$ $CH_{3}CH_{2}CH_{2}CH_{2}CH_{2}OH$ $CH_{3}CH_{2}CH_{2}CH_{2}OH$ $CH_{3}CH_{2}CH_{2}OH$ $CH_{3}OH$

A graduated cylinder is filled with water to the 25.0 mL mark. After 27.5 g of titanium dioxide $(TiO_{2})$ is added, the volume is 31.5 mL. Calculate the density of the $TiO_{2}$ to the correct number of significant figures. $0.873g/cm^{3}$ $0.87g/cm^{3}$ $4.2g/cm^{3}$ $4.23g/cm^{3}$ $3.1g/cm^{3}$

How many mmHg are in 1.6320 atm? 12.241 mmHg 165.36 mmHg 465.69 mmHg 1.240.3 mmHg

The chemical formula for chlorous acid is __ $HClO_{3}(aq)$ $HClO_{6}(aq)$ $HClO(aq)$ $HClO_{2}(aq)$

What is the conjugate base of the hydronium ion. $H_{3}O^{+}$ i Multiple Choice $OH^{-}$ $H_{2}O^{-}$ $H_{2}O$ $H_{3}O^{+}$ has no conjugate base.

Identify the group or period that begins with the element Be. period 1 group 3A period 2 group 1A period 3 group 2A

d Choose the mass interpretation for this equation. $2\times 34.1gH_{2}S+4\times 32.0gO_{2}\rightarrow 2\times 64.1gSO_{2}+3\times 18.0gH_{2}O$ $3\times 34.1gH_{2}S+4\times 32.0gO_{2}\rightarrow 3\times 64.1gSO_{2}+3\times 18.0gH_{2}O$ $2\times 34.1gH_{2}S+3\times 32.0gO_{2}\rightarrow 2\times 64.1gSO_{2}+2\times 18.0gH_{2}O$ $3\times 34.1gH_{2}S+2\times 32.0gO_{2}\rightarrow 3\times 64.1gSO_{2}+3\times 18.0gH_{2}O$

Given the Haber reaction at equilibrium: $N_{2}(g)+3H_{2}(g)\rightleftharpoons 2NH_{3}(g)+heat$ Which stress on the system at equilibrium favors the production of $NH_{3}(g)$ A. decreasing the concentration of $H_{2}(g)$ B. increasing the concentration of $H_{2}(g)$ C. increasing the pressure on the system D. increasing the temperature of the system