Why can't you see some of the reactions? They are producing a gas. They produce water, a soluble salt, an acid or a base. They are being neutralized. They are not reacting.

Discrete energy levels that contain the electrons of an atom are called __ orbital energies energy shells electronegativities ion rings

Find the pOH for the following: 735 L of a solution containing 0.34 moles of nitric acid. (find Molarity first) 4.63 10.67 3.33 2

What are the characteristics of a primary standard? It must be reasonably soluble. It must have a reasonably high molar mass. It must have a reasonably low melting point. It must react rapidly with the substance being standardized in a known stoichiometry. It must react with the substance being standardized in an exothermic reaction.

What temperature (in^circ C) did an ideal gas shift to if it was initially at -10.2^circ C at 4.61 atm and 39.0 L and the pressure was changed to 3.0 atm and the volume changed to 40.78 L? Enter a numeric answer with 1 place after the decimal. Answer square

Commercially pure coppers are __ Select one: a. hard b. very ductile c. strong d. all of the above

49. Us ng the molecular orbital model, write electron configurations for the following diatomic species and calculate the bond orders . Which ones are paramagnetic? a. Li_(2) SHOW ANSWER b. C_(2) SHOW ANSWER C. S_(2)

Please match the following terms with the correct description. Carbonic acid donates mathrm(H)+ ions to a solution & Base Bicarbonate accepts mathrm(H)+ ions from a solution & Acid

Consider the reaction of nitrogen dioxide with chlorine to give nitryl chloride, NO_(2)Cl. The average rate of change of NO_(2) is -5.20times 10^-8M/s What is the average rate of change of nitryl chloride? 2NO_(2)(g)+Cl_(2)(g)arrow 2NO_(2)Cl(g) -1.04times 10^-7M/s 1.04times 10^-7M/s -5.20times 10^-8M/s 5.20times 10^-8M/s

A glass container was initially charged with 3.30 mol of a gas sample at 4.00 atm and 21.7^circ C . Some of the gas was released as the temperature was increased to 30.1^circ C so the final pressure in the container was reduced to 1.25 atm. How many moles of the gas sample are present at the end?

Hot Questions

$2N_{2}O_{5}(aq)\rightarrow 4NO_{2}(aq)+O_{2}(g)$ Which choice represents the relative rate expression between $N_{2}O_{5}$ and $NO_{2}$ ? 1 $Rate=-\frac {1}{2}\frac {\Delta [N_{2}O_{5}]}{\Delta t}=\frac {1}{4}\frac {\Delta [NO_{2}]}{\Delta t}$ 2. $Rate=\frac {\Delta [N_{2}O_{5}]}{\Delta t}=\frac {\Delta [NO_{2}]}{\Delta t}$ 3 $Rate=-\frac {1}{4}\frac {\Delta [N_{2}O_{5}]}{\Delta t}=\frac {1}{2}\frac {\Delta [NO_{2}]}{\Delta t}$ 4 $Rate=2\frac {\Delta [N_{2}O_{5}]}{\Delta t}=4\frac {\Delta [NO_{2}]}{\Delta t}$

At high temperatures bromine molecules can dissociate into bromine atoms. For the reaction $Br_{2}(g)\rightleftharpoons 2Br\cdot (g)$ $K_{p}=2.48\times 10^{-3}$ at $1650^{\circ }C$ A 5.00 L vessel at $1650^{\circ }C$ is filled with $Br_{2}(g)$ at an initial pressure of 6.00 atm and allowed to come to equilibrium. What will be the pressure (in atm) of $Br\cdot (g)$ at equilibrium?

The boiling point of bromine is $59^{\circ }C$ Which of the following best predicts the boiling point of iodine monochloride, a polar compound? Higher than $59^{\circ }C$ because dipole-dipole interactions in iodine monochloride are stronger than dispersion forces in bromine. Lower than $59^{\circ }C$ because ionic bonding in bromine is stronger than covalent bonding in iodine monochloride. Lower than $59^{\circ }C$ because dipole-dipole interactions in iodine monochloride are weaker than in bromine. Higher than $59^{\circ }C$ because ionic bonding in iodine monochloride is stronger than H-bonding in bromine.

Under certain conditions the rate of this reaction is zero order in ammonia with a rate constant of $0.0026M\cdot s^{-1}$ $2NH_{3}(g)\rightarrow N_{2}(g)+3H_{2}(g)$ Suppose a 300. mL flask is charged under these conditions with 450.mmol of ammonia. How much is left 100 s later? You may assume no other reaction is important. Be sure your answer has a unit symbol,if necessary, and round it to the correct number of significant digits. $\square $

Cleaning chemicals are generally not health hazards True False

Identify the molecule or molecules containing polar covalent bonds. HF CsF $Br_{2}$ KH $N_{2}$

A saturated solution holds the maximum amount of solute under the solution conditions. True False

Copper, a good conductor, has __ electron(s) in its valence shell. a. 1 b. 3 c. 4

To identify a chemical's hazards, check its: Smell Color MSDS

A 0.788 mole sample of ideal gas at $12^{\circ }C$ occupies a volume of 4.25 L. What is the pressure of the gas? $\square $