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State and explain the trend in reactivity for the alkali metals. Why does reactivity increase or decrease down a group?
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Magnesium metal(0.100 mol) and a volume of aqueous hydrochloric acid that contains0.500 mol of HCl are combined and react to completion. How manyliters of hydrogen gas, measured at STP, are produced? Mg(s) + 2HCl(aq) --- ...
Silver nitrate has the molecular formula AgNO3. In a 109.0 g sample of silver nitrate, how much of that mass (in g) is from the silver atoms?
A sample consisting of 1.0 mol CaCO3(s) was heated to 800 °C, when it decomposed. The heating was carried out in a container fitted with a piston that was initially resting on the solid. Calculate the work done during co ...
15 grams of NaCl is dissolved completely in a beaker containing 200mL of water. What is the Na+ concentration in moles/liter in the final solution?
20.2 g of an unknown molecular solute is dissolved in 5.65 moles of aniline (C6H5NH2), causing the boiling point of aniline to increase by 3.79 °C. Calculate the molar mass of the solute. For aniline, the molar mass is 9 ...
What wavelength of light (nm) is required to eject an electron with a speed of 2.0 x 10 6 m/s from a metal with a threshold energy of 3.4 x 10 -18 J?
A chemist must prepare 450. mL of 130. mM aqueous aluminum sulfate (Al2(SO4)3) working solution. He'll by pouring out some 0.452 mol/L aqueous aluminum sulfate stock solution into a graduated cylinder and diluting it wit ...
1-Write balanced equation for the double-replacement precipitation reaction described, using the smallest possible integer coefficients. A precipitate forms when aqueous solutions of nickel(II) iodide and potassium c ...
How many water molecules are associated with a single salt molecule in a hexahydrate?
What could a source of error be during a titration lab that is not a humans fault?
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