Zn(OH)_(2) has a K_(sp) of 4.5times 10^-17 If you have a solution of Zn(OH)_(2) that has a hydroxide ion concentration equal to 4.6times 10^-6M what is the solution? unsaturated supersaturated No answer text provided. saturated
Write the full electron configuration for P^3- E full electron configuration: square What is the atomic symbol for the noble gas that also has this electron configuration? atomic symbol: square
Which of the following represents a chemical change? Rocks being smoothed by rapid water movement The pink color of a rose Decomposition of stone due to acid rain
Write net ionic equation for the reaction between nitric acid and calcium hydroxide. Express your answer as a chemical equation Identify all of the phases in your answer. square A chemical reaction does not occur for this question.
Consider the reaction N_(2)(g)+3H_(2)(g)arrow 2NH_(3)(g) If the concentration of the product NH_(3) decreased, which way would the chemical system shift? Left Right It would not shift.
A chemical system is in equilibrium when free energy exists at __ the highest possible value the lowest possible value equal proportions
A flexible container holding 1.25 moles of a gas contracts from 25.0 L to 10.0 L when some gas is removed.The pressure and temperature remain the same throughout. How many moles of gas are in the contracted container? n_(2)=[?] mol
What characterizes a strong acid or base? ionic bonding presence of a hydroxide or hydrogen ion complete ionization in water polar covalent bonding
What is pH? the positive logarithm of the hydroxide ion concentration the positive logarithm of the hydrogen ion concentration the negative logarithm of the hydrogen ion concentration the negative logarithm of the hydroxide ion concentration
Which of the following is a property of an acid? sour taste strong color unreactive nonelectrolyte
22. When sugar is mixed with water equilibrium is reached when molecules of sugar stop moving the dissolved sugar molecules are evenly distributed throughout the
For which of the properties would aluminum have a greater value than gallium? 1. Atomic radius 2. Ionic radius 3. Electronegativity 4. Ionization energy
1A. Which of the following is most likely a significant cause of the general trend indicated by the graph? A. Reduction of ozone concentration in the upper atmosphere B. Reduction in size of polar ice caps C. Increase in energy output of the sun D. Increase in evaporation of ocean water E. Increase in consumption of fossil fuels 1B. Based on the results of the graph, which oceanic changes will be observed? A. pH will decrease, but the ocean will remain basic B. pH will increase and the ocean will become more basic C. pH will decrease and the ocean will become acidic D. pH will not significantly change 2A. When "strong," these dissociate completely in solution. A. Acid B. Base C. Both 2B. Is a proton-donor when dissolved in solution. A. Acid B. Base C. Both 2C. A solution with a pH greater than 7, up to 14. A. Acid B. Base C. Both 2D. A solution that contains more hydronium ions $(H3O+)$ than hydroxide ions $(OH-).$ A. Acid B. Base C. Both
Question 7 Match the definition with the correct term about the atom in relation to the periodic table. number of protons in the nucleus of an $\square $ atom [Choose] [Choose] total number of protons and neutrons in mass number the nucleus of an atom atomic mass atomic number $\square $ weighted, average mass of all isotopes of a naturally occurring element 1 pts
Properly identify the following ions (some answers will be used twice and some answers will not be used at all) magnesium $\square $ phosphate $\square $ ammonium $\square $ chloride $\square $ iron (III) $\square $ perchlorate $\square $
have gone into the field to take water samples from lakes in your town. note the following observations: Lake A contained many fish swimming in its waters. Lake B had very few fish swimming in its waters, and a few dead fish floating on the water. u return to your lab and take pH readings for each mple. Think about how acids and bases would affect the water quality in the two lakes. Which set of pH data would you expect to see based on your observations? Lake A: $pH=4.5$ Lake B: $pH=7.5$ Lake A: $pH=8.3$ Lake B: $pH=3.7$ Lake A: $pH=6.6$ Lake B: $pH=6.8$ Lake A: $pH=10.2$ Lake B: $pH=1.7$
A buffer consists of a weak acid and its conjugate hase in the same solution. Match the weak acid-conjugate base pairs that could be used to make a buffer. (Carvat does not show subscripts HCOOH $\square $ [Choose] $HC2H3O2$ $\square $ : HCN [Choose] H2O $NaCOOH$ $NaC2H3O2$ $NaOH$ $HCl$ $HaCN$ Question 9 aspts
${}_{2}^{4}He$ How many protons does He have? a b b C 2 d 6
Student B: At the beginning of the reaction the rate of the forward reaction was higher than the rate of the reverse reaction: ammonia and water were turning into ammonium hydroxide. But now, the rate of the reverse reaction is higher. Which student has the most accurate answer? Choose 1 answer: A Student A B Student B C Both students' answers are correct.
The number of atoms in a mole of something remains the same, but the mass of a mole depends on how many atoms you have the average atomic mass of the elements
