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2 d of sample containing Na2CO3 and NahCO3 loses 0.248g when heated at 300 degree Celsius, them at which NaHCO2 decomposes to Na2CO3 and water. Explain what is the % of Na2CO3 in the mixture?
Discuss how nitrogen, once fixed, enters into anabolic biochemical reaction pathways. Your discussion should include how it is eventually
Choose the answer which presents the chemical formulas for two substances in order of decreasing melting point (highest melting point first) and gives a valid reason for this order.
Draw the structure of the product of the reaction between cyclohexene and O3 then (CH3)2S Indicate stereochemistry.
Draw the major organic product of the reaction. Indicate the stereochemistry via wedge/dash bonds, including explicit H and D atoms
A urine sample contains 46.5mgL-1 of ethanol. The density of ethanol is 0.79gcm-3. What is the concentration expressed as %v/v
A wildlife biologist is interested in testing the pH of the water in a lake. He obtains a 200. mL sample of the water and titrates this sample with a .050 M NaOH solution.
How long must a current of 0.75 A pass through a sulfuric acid solution in order to liberate 0.100 L of H2 gas at STP
Expand to final volume at constant pressure and then adjust to final temperature by interaction with a heat bath.
Based on the given chemical equation, how many grams of aluminum are needed to react with 0.6 moles of hydrochloric acid? Al + HCl yields AlCl3 + H2
Find the pH and volume (mL) of 0.447 M HNO3 needed to reach the equivalence point(s) in the following titration. 0.188 L of 0.550 M NH3. 231L or 231mL is the about of HNO3 needed to reach equivalence, but I can not sort the pH.
how many millimeters of 5M NaOH are needed to neutralize 40mL of 2M H2SO4
Calculate the quantity of heat energy in kilocalories evolved when 75 g of liquid water forms ice at 0 0C. (heat of solidification = 80 cal/g).
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