Other Chemistry Answers

You have 75 mL of a solution with [Zn2+] = 0.031 M. The pH of this solution = 8. You titrate this solution with 0.055M EDTA. Remember that pMn+ = -log(Mn+)

a) What is true at the equivalence volume for any titration?

b) Calculate the Ve (the equivalence volume) for this titration?

c) Calculate the pZn2+ after addition of 20 mL EDTA

d) Calculate the pZn2+ at the equivalence volume

e) Calculate the pZn2+ after addition of 50 mL EDTA

How many grams of KCIO3 are needed to make 1.5 x 10^24 particles of O2


2KCI + 3O2 = 2KCIO3

Please predict the bond angles about the central atom in: Words to choose:bent,trigonometry planar,tetrahedral,trigonal bipyramidal,octahedral,0 non bonding pairs,1 non bonding pairs,2 non bonding pairs,109,5 degrees,120 degrees,180 degrees.Thanks.

. 4)CBr4:____Electron-domain geometry with_____on C.We confidently predict _____angles. 5)TeBr4:_____electron-domain geometry with_____on Te will cause the bond angles to deviate from ideal values.

Please predict the bond angles about the central atom in: Words to choose:bent,trigonometry planar,tetrahedral,trigonal bipyramidal,octahedral,0 non bonding pairs,1 non bonding pairs,2 non bonding pairs,109,5 degrees,120 degrees,180 degrees.Thanks


2)BCl3:______electron-domain geometry with ______on B .We confidently predict_____angles. 3)CH3I:______electrin-domain geometry with ____on C.Because the bonding electron domains are not exactly the same,we predict some deviation fro ideal _____ angles

Please predict the bond angles about the central atom in:

Words to choose:bent,trigonometry planar,tetrahedral,trigonal bipyramidal,octahedral,0 non bonding pairs,1 non bonding pairs,2 non bonding pairs,109,5 degrees,120 degrees,180 degrees.Thanks

1)H2S:______ electron-domain geometry with______on S will cause the bond angle to deviate from ideal ________ angles.

Which of the following is not a reason why some substances whose purity cannot be exactly known?

Show Options

A.they react with CO2 in air or moisture in air

B.because they are non-volatile.

C.they are highly hygroscopic

D.they react moisture in air

24.3 grams of a metal was heated to 95.0°C and placed immediately into an insulated container containing 50.0 grams of water at 25.0°C. The final temperature of the water is 26.8 °C. What is the specific heat of the metal?

a 1.00 g sample of a metal x (that is known to form x+2 ions) was added to a 0.100cm3 of 0.500mol dm3 h2so4. after all the metal head reacted, the remaining acid required 33.40 cm3l of 0.500mol dm3 naoh solution for neutralization.calculate the molar mass of the metal and identify the element.

How many grams of oxygen are needed to combust 20.0 grams of propane?

Hydrogen gas (H 2 ) is reacted with nitrogen gas (N 2 ) in a long glass tube. Where would the reaction take place, in the middle, closer to the hydrogen source or closer to the nitrogen

source? Support your answer with a calculation.