Convert the following measurement. 4.9times 10^-7(mol)/(gcdot cm^2)=square (mol)/(kgcdot m^2)
Pure silver has a density of 10.53g/cm^3 What is the mass of a piece of silver that has a volume of 17.04cm^3 multicolumn(6)(|c|)( g ) Basic & Funcs & Trig & & & & square & x^square & x_(square) & sqrt(} & sqrt[n]{ ) & uparrow & downarrow
What is the mass in grams of 5.7times 10^25 formula units of aluminium sulfate? square
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)
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
