The pHofa fruit juice is 5.6.Find the hydronium ion concentration, [H_(3)O^+] of the juice. Uso the formula pH=-log[H_(3)O^+] The hydronium ion concentration [H_(3)O^+] is approximately square moles per liter. (Use scientific notation. Use the multiplication symbol in the math palette as needed. Round to the nearest tenth as needed.)

What is the molecular formula of a molecule that has an empirical formula of CH_(2)O and a molar mass of 120.12g/mol

State the number of valence electrons for each of the following elements. Sn square

What is the term for a pure substance that cannot be broken down any further by ordinary chemical reaction? homogeneous mixture element compound heterogeneous mixture none of the above

Which of the following groups of elements has the highest ionization energy? Group VIIA/17 Group VIIIA/18 Group IIB/12 Group IA/1 Group IIA/2

What is the current official name for element 108? hassium bohrium seaborgium dubnium none of the above

Which of the following is an example of a chemical change? charring sugar cooking a steak baking a pie boiling an egg all of the above

Which of the following is an example of a physical property? physical state melting point color crystalline form all of the above

What is the term for the weighted average mass of all the naturally occurring isotopes of an element? atomic mass atomic notation mass number atomic number none of the above

Which of the following is an inactive ingredient used as an occlusive skin protectant? Glycerin Lecithin Petrolatum Dimethicone

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 $