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An object displaces 2.3×10-³ m-³ of water when totally immersed into it. What is the bouyant force exerted by water? What is the density of the object in its mass is 26 kg? Of what material is the object was made of?
3. Give the no. of protons, electrons, and neutrons in neutral atoms of the following isotopes: (2 points each) (a) 73Li (b) 12552 Te (c) 147 Ag
Calculate the equilibrium concentration of the nonionized acids and all ions in a solution that is
0.25 M in HCO2H and 0.10 M in HClO.
What is the mole fraction of HCl in an aqueous solution that contains 44.2 grams HCl and 88 grams H20?
what is the molarity of 3.0 moles of NaCl dissolved in 2000 g of water has a concentration of 1.5 m NaCl water solution.
The molal freezing point of water is 1.86°C/m (1.86K/m), which can be expressed as 1.86°C kg H₂O/mal solute (1.86K kg H₂O/mol solute) after some algebraic rearrangement. This means that a solution of 1 mol cane sugar (342g, over-Ib) dissolved in 1kg of water should freeze at -1.86°C.
Describe the freezing point drop suggestes in number 1.
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A 0.205 g sample of CaCO3 (Mr = 100.1 g/mol) is added to a flask along with 7.50 mL of 2.00 M HCl. CaCO3(aq) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)Enough water is then added to make a 125.0 mL solution. A 10.00 mL aliquot of this solution is taken and titrated with 0.058 M NaOH. NaOH(aq) + HCl(aq) → H2O(l) + NaCl(aq)How many mL of NaOH are used?
how many grams of k2cr207are therein 8.90×1024 molecules of k2cr207
Define half-life. Prove that the half-life of 1st order reaction is independent of the initial concentration of the reactant.
