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How many atoms of 90Sr are in a 220.0 mL glass of milk with 1.25 Bq/L of 90Sr radioactivity? (The half life for the beta decay of strontium-90 is 28.8 years)
How many grams of aluminum chromate are produced from 66.4 grams of aluminum hydroxide?
Calculate the pH after the following additions of the KOH solution (a) 10.0 mL (b) 11.5 mL (c) 15.0 mL (the Ka for CH3COOH = 1.8 x 10^-5)
When she introduced 3.63E-2 moles of N2(g) and 6.18E-2 moles of H2(g) into a 1.00 Liter container, she found the equilibrium concentration of NH3(g) to be 9.68E-4 M.
if i have 0.621 mole of potassium chlorate that decomposes by heat, what is the amount of the oxygen in moles?
How many moles of bromine will react with 0.0500 mole of C2H2 in the reaction C2H2 + 2 Br2 -> C2H2Br4?
Determine the concentration of the total available acid of the apple juice express your answer in moles/L?
When aqueous solutions of lead( II) ion are treated with potassium chromate solution, a bright yellow precipitate of lead( II) chromate, PbCrO4, forms
what is the bp of its enantiomer?What optical rotation would be observed if 7.2 g of (S)-amine were mixed with 7.2 g of the (R)-amine?
Using a Sample of 0.3991 grams of an unknown monoprotic acid, HA, which combines with Sodium hydroxide according to the balanced equation HA + NaOH ® NaA + H2O when 35.30 mL of 0.1086 M Sodium hydroxide is required to titrate the acid to the equiv..
What volume would be occupied by 100 g of oxygen at a pressure of 1.50 atm and a temperature of 25ºC?
Calculate the amount of heat required to heat a 3.6 kg gold bar from 25 C to 64 C. Specific heat capacity of gold is 0.128 j/g C.
How much heat is produced by the complete combustion of 256 CH4 of ? CH4+2O2=CO2+2H2O Hrxn=-802.3kJ
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