Other Chemistry Answers

Calculate the [H3O+], [OH], pH, and pOH for a solution prepared by dissolving 3.1g KOH(s) (FW=56g/mol) unto enough water to give a volume of 0.500L.

Consider the reaction K2S(aq) + Co(NO3)2(aq) --> 2KNO3(aq) + CoS(s)

What mass of CoS is produced from 4.84 g Co(NO3)2 and 115 mL of 0.225 M K2S solution? _____ g (Give answer to correct sig figs in units of g)

Consider the reaction 3CaCl2(aq) + 2Na3PO4(aq) --> Ca3(PO4)2(s) + 6 NaCl(aq) (molar mass of calcium phosphate is 310.18 g/mol)

What volume of 0.500 M Na3PO4 solution is needed to react with 275 mL of 0.150 M CaCl2? _____ mL (Give answer to correct sig figs in units of mL)

Can a drug have a long half life life of say 2 hours but a short duration of action of ~20mins?

you are provided with Hemoglobin standard of 150mg/l and a haemolysis marked l. using the standard, determine the hemoglobin concentration of l and draw a calibration curve using the hemolysate. From your graph, determine the HB concentration of samples E and F.

A type of energy related to the flow of charges

A 21.496 g sample of magnesium is burned in air to form magnesium oxide and magnesium nitride. When the products are treated with water, 2.813 g of gaseous ammonia are generated. Calculate the amounts of magnesium nitride and magnesium oxide formed.

is there a way to combine a human's speed with 6.02x10^23 to make them as fast as light?

After living most of their lives on the main sequence, stars then become giants that undergo “triple-alpha” fusion. This inner core process fuses 3 Helium atoms into 1 Carbon atom. The mass of 3 Helium atoms is 1.995 x 10-26 kg, and the mass of one C atom is 1.992 x 10-26 kg. Use this information, along with the speed of light, to calculate the amount of energy generated from the fusion of three He atoms into one C atom.

Your answer should have 3 decimal places and given as x 10-10 J. (e.g., 5.7 x 10-10 J should be entered as "5.700"). Keep in mind that if you use a calculator, you'll need to move the decimal point around a bit to get into the right order of magnitude..

what is the molar concentration of 5g of sodium hydroxide in 250cm^3{Na=23,H=1}