48 Answered Questions for the topic Chemistry HelpNeeded
what does it mean when we say peptide 35 or peptide2 is that the location of the amino acid
A sample of MgCO3•3H20 (magnesium carbonate trihydrate) is heated until 40.37 grams of water are released. How many grams did the original hydrate weigh?
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A sample of gas at a pressure of 3.0 atm was compressed from 6.00 L to 3.00 L at constant temperature.
At constant temperature and pressure, 1.25 mol of hydrogen gas occupies 28 L at STP.
Use the combined gas law
What volume of oxygen gas at STP is required to react with 10g of potassium metal according to the following equation?
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Marble is made primarily of calcium carbonate.
What volume (in mL) of 0.348 mol/L calcium hydroxide. Ca(OH)2 (aq), is needed to completely neutralize 38.2mL of 0.432 mol/L phosphoric acid, H3PO4 (aq)
A commercial refrigeration unit accidentally releases (6.42*10^1) mL of ammonia gas at SATP. Determine the mass and number of molecules of ammonia gas released.
A 30.00 ml gas syringe was at a pressure of 100.0 kPa at 30.0°c
in the manufacture of potassium permanganate a solution containing manganate ion is oxidized by chlorine. Would bromine or iodine be as good?
aqueous potassium chloride will react with which of the following?
Question about how significant digits work in chemistry.
what can i say for the conclusion armspan vs height with the 0.98 positive correlation coefficient
evaluate the accuracy of the measurements made, contrasting them with wet techniques, where eg. (determination of Cu2+ concentration by titration and
Which of the following is the weakest acid?
write chemical, complete ionic and net ionic equations for the reaction between CaCl2 and NaCO3
iron crystallizes in a body-centered unit cell with an edge length of 287 pm. what is the atomic radius of iron
When KCl dissolves in water...