Chemistry Answers

How many grams of O2 are required to produce 358.5 grams of ZnO?

2ZnO + O2 -> 2ZnO

A. The conversion of malate into fumarate: 1. Malate) fumarate)+ H₂Om

is endergonic at body temperature, 37°C, AG is 2.93 kJ mol'. In metabolism the

reaction is coupled with

2. fumarate) aspartate()

for which AG is-15.5 kJ mol at 37°C

a. Calculate Keg for reaction 1.

b. Calculate Ke, for reaction 2.

calculate the pH of a solution prepared by dissolving 2.05 g of sodium acetate, CH₃COONa, in 78.0 mL of 0.25 M acetic acid, CH₃COOH(aq). Assume the volume change upon dissolving the sodium acetate is negligible. k_a of CH₃COOH is 1.75 x 10^-5

A strong acid is a corrosive substance that can cause skin burns. If a strong acid is accidentally

spilled on your arm, would you wash it with a strong base to neutralize the acid?

Which is the odd man out

(A) HCL

(B) NH³

(C) NO²

(D) CO

Distilled water is different from deionized water because

(a) distilled water is a product of condensed steam while deionized is filtered laboratory water

(B) distilled water is always pure and sold in pack while deionized water is not package for consumption

(C) distilled water is a condensed steam but deionized water is produce using exchange resin which absorb undesired ions

(D) distilled water is man made while deionized water is both natural and artificial

 What weight of pure Na₂CO₃ should be taken so that about 25mL of  approximately 0.1M HCl will be used in a standardization titration using methyl    red end point?

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Predict whether the following reaction would proceed spontaneously as written 298K.

Co + Fe2+ -> CO2+ + Fe

Given that [Co2+]=0.15M and [Fe2+]=0.68M

Co2+ + 2e- ->Co E°=-0.28V

Fe2+ + 2e- -> Fe E°=-0.44

What is the potential of a cell made up of Zn/Zn2+ and Cu2+/Cu, half cell at 76°c. If [Zn2+]=0.25M and [Cu2+]=0.15M

Given that Zn/Zn2+ E°=-0.76V, Cu2+/Cu E°=0.34