(ii) A sample of 3.25 cm³ of bromine vapour leaks into a laboratory. Calculate the minimum volume, in dm³, of the laboratory for the resulting concentration of bromine to be at a safe level.
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- Write the formula for a micelle of a sol of barium sulfate, obtained by the exchange reaction between barium nitrate and potassium sulfate in the case of an excess of barium nitrate.Distinguish between water quality and hydrochemistry.When treating a mixture of metals( copper and zinc) with an excess of solution of hydrochloric acid, 2.24 liters of a gas(STP) were released. When the same mixture was treated with phosphoric acid precipitate of 93.5g is formed. Find the mass fraction of metals in the initial mixture.
- (a) Predict the identity of the precipitate that forms when solutions of BaCl, and K,SO, are mixed. (b) Write the balanced chemical equation for the reaction.The equilibrium constant Kc for the reaction N2(g) + O2(g)⇋ 2NO(g) at 1200 degrees Celsius is 1.00 x 10-5. Calculate the equilibrium molar concentrations of NO, N2, O2 in a reaction vessel of volume 10.00 L that initially held 0.312 mol N2 and 0.407 mol O2.1. The reaction below will give us: a. 2b. 4c. 3d. 3 and 4e. 1
- Suppose CaO is placed in a vacuum in which the partial pressure of oxygen is 10^-5mm Hg. Will CaO be reduced?Explain the principle of electrostatic precipitation in gas cleaning .A lump of sucrose of mass 10.0 g is suspended in the middle of a spherical flask of water of radius 10 cm at 25 °C. What is the concentration of sucrose at the wall of the flask after (a) 1.0 h, (b) 1.0 week. Take D = 5.22 × 10−10 m2 s−1.
- A chemical reaction occurred when 500 mL of 7.5 x 104M Cal2 and 100 mL of 1.7 x 105M Pb(NO3)2 solutions were mixed at 25.0°C. Ksp = 1.4 x 108 а. Write out the complete chemical reaction that occurs when the calcium iodide is mixed with lead(II)nitrate. The equation must be balanced, and the states of matter need to be shown. b. Determine whether a precipitate will form. If the temperature at which the substances were mixed was lowered to -25.0°C, do you С. think that could impact your answer given in part b? Explain your answer using your knowledge about equilibrium. Assume the volumes and concentrations were not impacted by the temperature change.Use the averaged volume of 0.020M KMnO4(aq) solution to calculate the number of moles of KMnO4 needed to reach the equivalent point.How do you write a net ionic equation for the formation of gas ex Al2(SO4)3(NH4)2SO4 •24 H2O + NaOH --> ?