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  • Question #ccabf - Socratic
    Because N aOH → N a+ + OH − and N i2+ + 2OH −→N i(OH)2 Total Mols of N aOH: 60mL ⋅ 0 45M ol L = 27mM ol of N aOH (dont forget the m for milli=one thousandth) This will produce 27 2 = 13 5mM ol of N i(OH)2 Now you multiply this by the molecular mass number to get the weight in milligrams (divide by 1000 to get the grams) Nickel (II)hydroxide may be formed without or (more likely
  • Question #8b520 - Socratic
    On reaction with nitrous acid, the ethanamine can be converted to alcohol and further on oxidation it gives ethanoic acid 🔴Ethanamine reacted with nitrous acid HNO2 (prepared from HCl+NaNO2) which gives ethanol and on further oxidation of ethanol gives ethanoic acid i e ⭐ "CH"_3"CH"_2"NH"_2 HNO2 ———> "CH"_3"CH"_2"OH" KMnO4 H+ —————> "CH"_3"COOH" 🔷 Alcohols on
  • Question #c0883 - Socratic
    "Oh! Now I remember where I put my wallet " "Oh" here is the interjection among your examples An interjection is a word or expression that utters on its own and expresses a spontaneous feeling or reaction These includes exclamations (ouch!, wow!), curses (damn!), greetings (hey, bye), response particles (okay, oh!, huh?), and hesitation markers (uh, er, um)
  • Question #a797d - Socratic
    B = +3 Recall; "OH" = -1 Hence; [B (OH)4]^- B + (-1)4 = -1 B + (-4) = -1 B - 4 = -1 B = - 1 + 4 B = +3
  • Question #93f99 - Socratic
    The molarity of the acid is 1 434 Start with the equation: 2HNO_ (3 (aq))+Ca (OH)_ (2 (aq))rarrCa (NO_3)_ (2 (aq))+2H_2O_ ( (l)) This tells us that 2 moles of HNO_3
  • Question #13e07 - Socratic
    $40 Cost after 10% discount = $36 So, 90% cost = $36 Therefore, 100% cost (that is no discount or off deal) = 36 90 xx100 = $40
  • Question #8e005 - Socratic
    2m^2n^2 sin^2 theta, where theta = angle between vecm and vec n If vecm and vec n are unit vectors, m and n are 1 and this becomes 2sin^2theta Assuming that the expression is |vecmXvecn|^2+|vecnXvecm|^2, it is 2m^2n^2 sin^2 theta, where theta = angle between vecm and vec n =2sin^2theta, for unit vectors, having m and n as 1, I have used vecmXvecn=-vecnXvecm and vecm X vec n = mn sin theta
  • Question #82a0c - Socratic
    Ionic solids are brittle because strong electrostatic attractions hold the cations and anions in definite positions in a crystal lattice > These attractions must be overcome to move the ions When the lattice structure shifts because of a sharp blow, ions of the same charge come closer together This causes strong electrostatic repulsions The like charged ions separate from each other, and
  • Question #321de - Socratic
    e^sinx(cos^2x)-e^sinx(sinx) We know that the first derivative is e^sinx(cosx) To get the second derivative we apply the product rule: Where f'(g)+g'(f) Let's say that f is our e^sinx and g is cosx We take the derivative of f and multiply it by g and add the derivative of g multiplied by f e^sinx(cosx)(cosx)+(-sinx)(e^sinx) Simplify: e^sinx(cos^2x)-e^sinx(sinx)
  • Question #23604 - Socratic
    g (x)=12x^2-24x+16 >"the quadratic in "color (blue)"standard form" is •color (white) (x)f (x)=ax^2+bx+c color (white) (x);a!=0 "expand " (x-1)^2" using FOIL" rArrf





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