In the reaction 2_(2)S+O_(2)arrow 2+2_(2)O the oxidation number of sulfur changes from -2 to 0 0 to -2 +2 to 0 0 to +2

Question 16 (1 point) Determine the oxidation state of P in PO_(3)^3- +3 +6 +2 0 -3

Question 14 (1 point) The molar solubility of Zns is 1.6times 10^-12 M in pure water.Calculate the K_(sp) for ZnS. 8.0times 10^-13 3.2times 10^-12 1.6times 10^-35 2.6times 10^-24 6.80times 10^-5

Question 3 (Mandatory) (1 point) Which of the following characteristics of water molecules is primarily responsible for the unique life-supporting properties of water? A) They are held together by ionic bonds. B) They are constantly in motion. C) They are polar and form hydrogen bonds. D) They contain carbon atoms.

Question 11 (1 point) What is the pH of a buffer that is 0.451 M HF and 0.118 M LIF?The K_(a) for HF is 35 times 10^-4 Your Answer: square

Which element has five valence electrons? Si Se s I Sb

Which of these atoms has the lowest electronegativity value? CI F Be Ca C

Which compound is most likely to exhibit covalent bonding? Fe_(2)S_(3) MgO CsBr Cl_(2)O Cu(OH)_(2)

What is the molecular geometry of the chlorite ion, ClO_(2)^- linear ) bent trigonal bipyramidal tetrahedral trigonal pyramidal

Convert the following to atm (atmospheres): 1. 340 torr 2. 30.53 psi 3. 540 mm Hg 4. 210 kPa

Hot Questions

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? $H_{2}O+H_{3}O^{+}\leftrightarrow H_{2}O+OH^{-}$ $H_{2}O+H_{2}O\leftrightarrow 2OH^{-}$ $H_{2}O+H_{2}O\leftrightarrow 2H_{3}O^{-}$ $H_{2}O+H_{2}O\leftrightarrow H_{3}O^{+}+OH^{-}$