Explain the four chemical or physical properties
Using iron and chromium as examples, explain the four chemical or physical properties in which the transition elements and their compounds differ from those of aluminum, magnesium and their compounds.
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The culture of bacteria obeys law of unihibited growth. If 500 bacteria are present initially and there are 800 after one hour, how many will be there in culture after five hours.
The synthesis of aluminum oxide is exothermic to the extent of 1672KJ/mol of oxide and the heat of formation of ferric oxide is-836 KJ/mol of ferric oxide.
Calculate the molar mass of the acid when a 0.2688-g sample of a monoprotic acid neutralizes the 16.4 mL of0.8133 M KOH solution.
Determine the concentrations of Cu2+,Cu(NH3)42+, and NH3 at equilibrium if 2.50 g of CuSO4 are dissolved in the 9.0 X102 mL of 0.30 M NH3,. Explain in detail.
What facts regarding solution of the quadratic equation can be reduced from discriminant of quadratic formula? Or we can say, what different kinds of solutions are possible depending on value of discriminant.
Determine the numbers of grams of antifreeze must be dissolved in the 300 g of water in order to reduce the freezing point of the water to-13.02o C under 1 atm pressure (Kf:1.86 o C/molar and C3H5(OH)3: 92.09g/mol).
Determine the probability that there will be one or more empty seats for any one flight? Find out the mean and standard deviation for this random variable.
Calculate the pH of (a) a solution that is 0.40 M CH3COOH and 0.20 M CH3COONa. (b) a 0.40 M CH3COOHsolution. Determine the pH of a saturated zinc hydroxide solution?
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