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answered Dec 17, 2018
Solution : Average high temperature $=\large\frac{76+80+1}{3}$$=75.67^{\circ}F$Average low temperatu...
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answered Dec 14, 2018
Solution : $\large\frac{x+x+2+x+4+x+6}{4}$$=40$=> $4x+12=160$=>$4x= 160-12=148$=> $4x=148$=...
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answered Dec 13, 2018
Solution : 25 minutes $=\large\frac{25}{60}$ hours =$\large\frac{5}{12}$$hr$30 minutes $=\large\frac...
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answered Dec 13, 2018
Solution : $\large\frac{x+y+z}{3}$$=9$$x+y+z=27$given $x+y=20$$20+z=27$$z=27-20=7$
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answered Dec 13, 2018
Solution : NaOH of sodium Hydroxide as it is an alkali or a base. Only bases when tested on a pH sca...
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answered Dec 13, 2018
Solution :$MgCl_2$ is the product formed when magnesium oxide reacts with hydrochloric acid and wate...
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answered Dec 13, 2018
Solution : calcium hydroxide is commonly referred as slaked lime.
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answered Dec 12, 2018
Solution : It has a H+ concentration of $10^{-4}$. The value of negative exponent$^{-4}$ gives pH va...
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answered Dec 12, 2018
Solution : since HCl is a base it turns red litmus to blue.
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answered Dec 12, 2018
Solution : $ CuSO_4.5H_20$ is a hydrated salt. An example of acid salt is $NaHCO_3$.
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answered Dec 12, 2018
Solution : Explanation: Concentration of an acid depends upon the water content whereas the strength...
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answered Dec 12, 2018
Solution : Acids have a pH range less than 7, Water is the only solvent that has a pH of 7 (neutral)...
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answered Dec 12, 2018
Solution : Table salt is the only substance listed that has ions when dissolved in its water solutio...
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answered Dec 12, 2018
Solution : The point in a titration when the "unknown" solution has been neutralized-in the case of ...
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answered Dec 12, 2018
Solution : A buffer solution resists the changes in pH.
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answered Dec 12, 2018
Solution :By definition, a Bronsted-Lowry acid is a proton donor.
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answered Dec 12, 2018
Solution : Because the pH is defined as the negative of the log of the $H^{+}$ concentration, it is ...
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answered Dec 12, 2018
Solution : The pH scale is 0 to 14; the numbers below 7 are acid and those above 7 are increasingly...
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answered Dec 12, 2018
Solution : $H_2SO_4$ is a strong acid because it is highly ionized.
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answered Dec 12, 2018
Solution :The hydronium ion is written as $H_3O^{+}$
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answered Dec 12, 2018
Solution : Potassium Hydroxide, commonly called caustic potash with formula KOH, is a caustic compou...
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answered Dec 12, 2018
Solution : Soda lime, solid is generally a white to grayish white coloured solid. It is the mixture ...
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answered Dec 12, 2018
Solution : Methyl orange is a pH indicator frequently used in titration because of its clear and dis...
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answered Dec 12, 2018
Solution :The word acid from the Latin words acidus or acere, which mean "sour", since one of the ch...
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answered Dec 11, 2018
Solution :At the boiling point of a liquid its vapour pressure becomes equal to the atmospheric pres...
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answered Dec 11, 2018
Solution :The value of $K_w$ increases with rise in temperature because dissociation of water is end...
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answered Dec 11, 2018
Solution : Equal amounts of reactants are poured into a suitable container. Given sufficient time, t...
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answered Dec 11, 2018
SolutionAglO≡Ag++IO−" role="presentation" style="position: relative;">AglO≡
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answered Dec 11, 2018
Solution :$P^H= 3 means [H^+]=10^{-3}M$100 ml juice contanis $10^{-3}\;mole \;H^{+}$ ions$\qquad= 10...
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answered Dec 10, 2018
$2Co_2(g)+O_2 \to 2CO_2(g)$ $\Delta H =-560\;kJ$ $\Delta H= \Delta V+W$ $-560= \Delta V+P \Delta ...
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answered Dec 10, 2018
Solution : The equilibrium constant $(K_c)$ for the give reaction is :$K_c=\large\frac{[SO_3]^2}{[SO...
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answered Dec 10, 2018
Solution : Given that initial temperature, $T_1 = 298\; K $ Final temperature, $T_2 ...
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answered Dec 10, 2018
Solution : Eq.of.thin $\large\frac{i.t}{96500}$ $\large\frac{22.2}{E}=\frac{2 \times 5 \times 60 \...
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answered Nov 30, 2018
Solution :$P^H$ of $0.1\;M$ Solution of weak acid is 3. The value of ionisation constant $Ka$ of aci...
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answered Nov 28, 2018
Solution :Relation between $K_{eq}$ and $E_{cell}$$E_{cell}= \large\frac{2.303}{nF}$$\log K_{eq}$$E_...
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answered Nov 28, 2018
Solution : Atom A is shared by 8 corners 1atoms of C is shared by 4 unit cellsAtom B is present at c...
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answered Nov 28, 2018
Solution : Atom A is shaded by 8 corners 1atoms of C is shared by 4 unit cellsAtom B is present at c...
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answered Nov 28, 2018
Solution : No of moles of products =1No of moles of reactants = $1 \large\frac{1}{2}$Given that $\De...
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answered Nov 28, 2018
Solution : $CH_3COOH +NaOH \to CH_3COONa+H_2O$$pH=pK_a+\log \large\frac{1/3}{2/3}$-------(1)at 2/3 n...
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answered Nov 28, 2018
Solution : 14 g of carbon - 14 atom contains $=6.023 \times 10^{23} \;atom$1 g of carbon - 14 atom c...
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answered Nov 28, 2018
Solution : $2Na_2S_2O_3 + I_2 \to Na_2S_4O_6+2NaI $Oxidation of S in $S_2O_3=2$again $2s_2O_3 \to S_...
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answered Nov 28, 2018
Solution : $\Delta =kb * M$In first case,$\Delta Tb =Kb m=Kb$ wt. of solute/Molwt. of soluteOr $0.1...
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answered Nov 28, 2018
Solution : Energy of photon $=\large\frac{hc}{\lambda}$$E= \large\frac{6.62 \times 10^{-34} \times 3...
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answered Nov 27, 2018
Solution: $3Ca(OH)_2 +2H_3PO_4 \to Ca_3(PO_4)_2+6H_2O$$\qquad= \large\frac{100}{1000}$$\times 0.0001...
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answered Nov 27, 2018
Solution : We have, volume of ethylene glycol$\qquad= 50 mL$$k'f =1.86\;k\;mol^{-1}\;kg$weight of wa...
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answered Nov 27, 2018
Solution : Magnetic moment , $\mu= \sqrt{n(n+2)}BM$ where,n = number of unpaired electrons $\mu =2.8...
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