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oh    音标拼音: ['o]
int. (表示惊讶,恐怖,赞叹)哦!

OH
n 1: a midwestern state in north central United States in the
Great Lakes region [synonym: {Ohio}, {Buckeye State}, {OH}]

Oh \Oh\ ([=o]), interj. [See {O}, interj.]
An exclamation expressing various emotions, according to the
tone and manner, especially surprise, pain, sorrow, anxiety,
or a wish. See the Note under {O}.
[1913 Webster]


-ol \-ol\ (-[=o]l or -[o^]l) suff. [From alcohol.] (Chem.)
A suffix denoting that the substance in the name of which it
appears belongs to the series of alcohols or hydroxyl
derivatives, as ethanol, carbinol, phenol, glycerol, etc.
Such compounds contain the hydroxy radical ({-OH}).
[1913 Webster PJC]


molecular formula \mo*lec"u*lar form"u*la\, n. (Chem.)
An expression representing the composition of elements in a
chemical substance, commonly consisting of a series of
letters and numbers comprising the atomic symbols of each
element present in a compound followed by the number of atoms
of that element present in one molecule of the substance.
Thus the molecular formula for common alcohol (ethyl alcohol)
is {C2H6O}, meaning that each molecule contains two carbon
atoms, six hydrogen atoms, and one oxygen atom. The molecular
formula may be written to provide some indication of the
actual structure of the molecule, in which case structural
units may be written separately. Thus, ethyl alcohol can also
be written as {CH3.CH2.OH} or {CH3-CH2-OH}, in which the
period or dash between functional groups indicates a single
bond between the principle atoms of each group. This formula
shows that in ethyl alcohol, the carbon of a methyl group
({CH3-}) is attached to the carbon of a methylene group
({-CH2-}), which is attached to the oxygen of a hydroxyl
group ({-OH}). A {structural formula} is a graphical
depiction of the relative positions of atoms in a molecule,
and may be very complicated.
[PJC]


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  • What is the chemical formula for lithium hydroxide? - Socratic
    Lithium is a Group 1 metal and commonly forms a M + ion Hydroxide anion, −OH, has a unit negative charge When they make music together, there is thus 1:1 stoichiometry between ions: Li(s) + H 2O(l) → LiOH (aq) + 1 2 H 2(g) ↑ ⏐ ⏐⏐
  • What is the formula of magnesium hydroxide? | Socratic
    Mg (OH)_2 Now we know that hydroxides are salts of HO^-, and some metal ion Now if the parent metal has an electronic configuration of 2:8:2, then there are 12 electrons, and the atomic number of the metal is equal to 12 We look on the Periodic Table, and we find that Z=12, for "magnesium metal" As a Group 2 metal, magnesium forms a Mg^ (2+) ion, and hence its hydroxide is Mg (OH)_2
  • What is the value of ΔG°cell? - Socratic
    ΔG_text (cell)^@= "-332 kJ·mol"^"-1"" Your standard reduction potentials for each half-reaction are: ulbb ("Standard Reduction Potentials"color (white) (mmmmmll)E
  • In an aqueous solution containing 1. 0 M NH_4Cl (K_a . . . - Socratic
    In an aqueous solution containing 1 0 M NH4Cl (K a = 5 56 × 10−10), what is the solubility of Mg(OH)2? K sp = 5 5 × 10−11
  • What makes for a good leaving group? + Example - Socratic
    A good leaving group has to be able to part with its electrons easily enough, so typically, it must be a strong acid or weak base relative to other substituents on the same molecule It helps to know the pKa of what would be leaving Let's say you had a mechanism where you are trying to do an E2 reaction to make an -OH (hydroxyl) group leave Maybe you have this compound on hand, sec-butanol
  • Question #6b9a2 - Socratic
    In order to answer these questions we first need to know the equation representing this chemical reaction In this case, it is a reaction between HCl and Ca (OH)2: Ca (OH) 2 + HCl → CaCl 2 +H 2 O Let's balance the equation: Ca (OH) 2 + 2 HCl → CaCl 2 + 2 H 2 O a Using the formula n = m M: ⇒ n(Ca (OH)) = 0 75 g 74 10 g mol−1 ⇒ n(Ca (OH)) = 0 01 mol In the balanced chemical equation
  • If 50. 0 milliliters of 3. 0 M H_3PO_4 completely . . . - Socratic
    If 50 0 milliliters of 3 0 M H3PO4 completely neutralized 150 0 milliliters of Mg(OH)2, what was the molarity of the Mg(OH)2 solution?
  • Why does neutralisation of any strong acid in an aqueous . . . - Socratic
    Because its the same reaction A monobasic [monoprotic] acid like HCl has one H atom, which fully dissociates to form a hydrogen ion, H^+ The strong alkali fully dissociates to forman hydroxide ion OH^-, which react to from water This is the ionic equation for neutralisation and occurs for all strong acid strong alkali reactions
  • Molarity question? - Socratic
    Consider the precipitation reaction of CuCl2 with NaOH: CuCl2 (aq) + 2NaOH (aq) -> Cu (OH)2 (s) + 2NaCl (aq) A What is the theoretical yield (in moles) of copper (II) hydroxide when 100mL of 0 125M CuCl2 is combined with 100 mL of 0 230M NaOH? I got 0 0115 mol Cu (OH)2 B What is the concentration (M) of each anion in solution after the reaction is complete? I got 0 125 M for Cl I know that
  • Question #bcaa2 + Example - Socratic
    Or, relative to benzene, the present OH is an electron-donating group, which donates electron density into the aromatic ring, away from the proton That makes the hydroxyl proton more partially positive than in benzene, whose hydrogens are all belonging to the aromatic ring That means it's more acidic, and so phenol is more prone to deprotonation than benzene As a note, the pKa of benzene is





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