How many total sodium ions are present in one formula uint of sodium ethane-1,2-diaminetetraacetatochromate (II) and sodium hexanitrito cobaltate (III) ?
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The formula of rust can be represented by `Fe_(2)O_(3)`. How many mole of Fe are present in 16 gm of rust.
16 gm rust `rArr(16)/(160)` moles of rust 0.1mole of rust moles of `Fe=2xx("molar of rust")` `=2xx0.1=0.2`
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If the concentration of `Mg^(2+)` ions in sea water is 1200 ppm. How many moles of NaOH are required to precipitate all `Mg^(2+)` ions into `Mg(OH)_(2
`"ppm"=(W_(Mg^(+2)))/(W_("water"))xx10^(6)` `10^(6)ml` solution contain `W_(Mg^(+2))=1200`ppm `[Mg^(+2)]=(1200)/(24)xx(10^(3))/(10^(6))` `[Mg^(+2)]=50xx10^(-3)=5xx10^(-2)=n_(Mg^(+2))` in 1 litre solution `n_(NaOH)` used =`2xxn_(Mg^(+2))` `=2xx5xx10^(-2)` `=10^(-1)xx10=1`
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A body `-` centred cubic lattice is composed of anions `Q` and cations `P`, where ions `Q` occupy the corners and ions `P` occupy the centre. `(i)` Wh
Correct Answer - `(i) PQ, (ii) P=8,Q=8;`
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In corrundum, oxid ions are arranged in `h.c.p.` array and the aluminum ions occupy two`-`thirds of octahedral voids. What is the formula of currundum
Correct Answer - `Al_(2)O_(3);`
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(i) Write the structural difference between starch and cellulose. (ii) What type of linkage is present in Nucleic acids ? (iii) Give one example each
(i) Starch : It is a mixture of two components- (a) water soluble component called amylose (15-20%) (b) and water insoluble component called amylopectin (80-85%) Both amylose and amylopectins are...
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Unit IUPAC norms write the formulae for the following: (a) Tris (ethane-1,2-diamine) chromium (III) chloride (b) Potassium tetrahydroxozincate (II).
(a) `[Cr(en)^(3)]^(x)Cl^(-1)` `3+0=x` `impliesx=3 implies[Cr(cn)_(3)]Cl_(3)` (b) `K[Zn(OH)_(4)]^(x)` `x=2-4=-2` `K_(2)[Zn(OH)_(4)]`
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Using IUPAC norms write the formulae for the following: (a) Potassium trioxalatoaluminate (III) (b) Dichloridobic (ethane-1,2-diamine)cobalt(III)
(a) `K[Al(o x)_(3)]^(x)" "(b)[CoCl_(2)(en)_(2)]` `x=3+(-2)xx3=x=-3` Formulae: `K_(3)[Al(o x)_(3)]`
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Derive Prism formula and Thin Prism Formula.
The prism formula for a prism in general is given by- μ = \(\frac{Sin[A+\delta_m/2]}{Sin(A/2)}\) Here, μ is the refractive index of the glass (or the material from which the prism is constructed). A...
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Standard enthalpy of formation of ethane is -84.7kjper mol calculate the enthalpy change for the formation of 0.1kg ethane
We have given, Standard enthalpy of formation of ethane = -84.7 kJ/mol molecular weight of ethane = 30 g/mol ∴ No. of moles of ethane in 0.1 kg or 100 g of ethane = \(\frac{100\,g}{30\,g/mol}\) =...
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How much positive and negative charge is present in 1 g of water? How many electrons are present in it?
Molecular mass of water is 18 gram, that means the number of molecules in 18 gram of water is 6.02 × 1023 ∴ Number of molecules in l gm of water...
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