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X cm³ of 0.15 mol dm³ zinc nitrate solution Zn(NO3)2 is pipetted into a 500 cm³ volumetric flask to produce 500 cm³ of 0.018 mol dm³ zinc nitrate solution. Zn(NO3)2. Determine the value of X.
Molar mass of Zinc nitrate = 189.36 189.36 × 0.018 =3.41×10 = 34.1= 500× 0.15/34.1= 2.2cm3
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1)Prepare n-butanyl bromide from n-butane
2)Prepare Ethyl bromide from n-butane
3)Prepare 1-Butanol from n-butane
4)Prepare 2-Butene from n-butane
1) CH3-CH2-CH2-CH3 + Cl2 ---gt; CH3-CH2-CH2-CH2-Cl + HCl CH3-CH2-CH2-CH2-Cl + KOH (dry) --gt; CH3-CH2-CH2=CH2 CH3-CH2-CH2=CH2 + Br2/H2O2 --gt; CH3-CH2-CH2-CH2-Br CH3-CH2-CH2-CH2-Br + KOH (aq) --gt; CH3-CH2-CH2-CH2-OH + KBr CH3-CH2-CH2-CH2-OH + NaBr/H2SO4...
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How many cm3 of oxygen would be required to react completely with 432 cm3 of hydrogen gas according to the reaction below?
2H2(g) + O2(g) ---> 2H2O(g)
Forgasses we don`t have to transform volumes into moles for calculations. That`swhy according to the equation of chemical reaction the volume of hydrogen is twice the volume of oxygen. V(H2)=...
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A fuel contains 4% hydrogen; 89% carbon; 1% sulphur; 2,5% oxygen, 3,5% ash and 20% excess air is supplies
Calculate
1.1 The mass of oxygen required to complete combustion of 1kg of fuel
1 kg of fuel contain 40 g of hydrogen, 890 g of carbon and 10 g of sulphur. 2H2 + O2 = 2H2O For complete combustion of 40 g of...
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If 100 cm3 of 37% hydrochloric acid, density 1.18 g / cm3, is added to 4900 cm3 of water, calculate the mass concentration of the newly formed solution!
1) Density = m / Vm = d x V = 1.18 x 100 = 118 gm (HCl) = 118 x 0.37 = 43.66 g2) Density of water is 1...
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0.5 moles of carbon is burned completely in oxygen. How many moles of carbon dioxide are produced?
Solution:Balanced chemical equation:C(s) + O2(g) → CO2(g)According to stoichiometry:1 mol of C produces 1 mol of CO2Thus, 0.5 mol of C produces:(0.5 mol C) × (1 mol CO2 / 1 mol C)...
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An alloy of mass 588g and volume 100cm3 is made of iron of density 8.0g/cm3 and aluminium of density 2.7g/cm3. Calculate the proportion (i) by volume, (ii) by mass of constituents of the alloy
1 cm3 of alloy would weigh 588/100 = 5.88 g1 cm3 of iron would weigh = 8.0 g1 cm3 of aluminum would weigh = 2.7 gLet proportion of iron be...
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what mass of carbon dioxide gas is formed when 1.56 kg of acetylene is burned in excess oxygen gas?
Acetylene combustion can be described by the following equation:2C2H2 + 5O2 = 4CO2 + 2H2OAccording to the reaction:m(CO2) = [m(C2H2) × 4 × Mr(CO2)] / [2 × Mr(C2O2)where m -...
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When 23 grams of methane gas combine with 42 grams of oxygen, 37 grams of water form, plus carbon dioxide. What mass of carbon dioxide is produced?
CH4(g) + 2 O2 (g) = CO2(g) + 2 H2O (g)1 : 2 : 1 : 223g : 42g : ? : 37g Therefore : ( 23/42) =0.5 moles 1...
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Butane gas, C4H10, is combusted to produce carbon dioxide and water vapour. If 0.67 mol of butane are reacted, how many moles of water vapour are produced?
2C4 H10 + 13 O2 = 8 CO2 +10 H2On (C4 H10 )= 0,67 mole n (H2O)=10*0.67/2=3,35 moleanswer: 3,35 mole
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