Which substance is most likely to be miscible with water? CS_(2) CF_(4) Br_(2) CHCl_(3) none of the above
Fill in the missing symbol in this nuclear chemical equation. (}_{11)^22Naarrow _(10)^22Ne+square
What is the main characteristic of a strong base? It is completely dissociated in water. C all of the above It will damage your skin. It is corrosive. It readily accepts an acidic proton.
What is the mass in grams of 36.70 moles of KBr?
What is the solubility product expression for Al(OH)_(3) A K_(sp)=[Al^3+][3OH^-] B K_(sp)=3[Al^3+][OH^-]^3 C K_(sp)=[Al^3+][OH^-]^3 D K_(sp)=[Al^3+][3OH^-]^3 E K_(sp)=[Al^3+][OH^-]
Which mixture looks smooth and the same throughout? heterogeneous homogeneous in suspension
Sn or Bi Sn Bi The larger atom cannot be determined based on periodic properties. They are the same size.
Pb or Po Pb Po The larger atom cannot be determined based on periodic properties. They are the same size.
What is the concentration in molarity of an aqueous solution which contains 20.01% by mass acetonitrile (MM=41.05g/mol) ? The density of the solution is 0.8100g/mL
What is the concentration of lithium ions in 0 .450 M Li_(2)SO_(4) ?
How many protons are in an atom of carbon with 7 neutrons? a) 6 b) 7 c) 12.01 d) 13 e) None of the above
How many electrons are in the element potassium with 20 neutrons? a) 19 b) 20 c) 39 d) 39.10 e) None of the above
An erlenmeyer flask has a calibration of 50 mL. To what value can you estimate a measured volume? the nearest 0.01 mL the nearest 1 mL the nearest 0.1 mL the nearest 10 mL
2. Can you determine conclusively that an unknown substance contains only magnetite by using only a magnet? Explain your answer. __
Before you go, which type of molecule would you choose to be the anode in a lithium battery? a) The metal with the most negative potential b) It does not matter since lithium's potential is so negative c) The metal with the most positive potential d) Another lithium compound
$2Fe_{2}O_{3}(s)+3C(s)\rightarrow 4Fe(s)+3CO_{2}(g)$ Calculate the mass of iron produced from the complete reaction of 64.0 grams of iron (III)oxide. 89.5 g Fe 22.48 Fe 11.2 g Fe 44.88 Fe 107 g Fe
QUESTION Q Which of the following is true concerning mass number? ANSWER Using mass number notation, we can identify the number of protons. electrons.and neutrons. Isotopes differ in their numbers of electrons. The mass number is equal to the number of protons. Thus, the mass number of Helium is 2. The mass of electrons contributes significantly to mass number. IDONT KNOWYET
Multiple Choice Question If phenol red is added to a solution with a pH of 9.0, it will appear __ pink-red yellow
What precipitate forms when mixing silver(I)nitrate and sodium chloride? silver(I) chloride sodium nitrate no precipitate forms
Which of these equations correctly expresses the self-ionization of water? $H_{2}O+H_{3}O^{+}\leftrightarrow H_{2}O+OH^{-}$ $H_{2}O+H_{2}O\leftrightarrow 2OH^{-}$ $H_{2}O+H_{2}O\leftrightarrow 2H_{3}O^{-}$ $H_{2}O+H_{2}O\leftrightarrow H_{3}O^{+}+OH^{-}$
