1,O2 gas contributes 21 % partial pressure in the atmosphere. What is the solubility of O2 in sea water
at sea level and 25 o
C, if kH of O2 at 25 o
C is 1.20 x 10 –3 M atm.?
2, A. The solubility of AgNO3 at 10 o
C is 170 g and at 20 o
C is 222 g. Is the dissolution of AgNO3
exothermic or endothermic? Give reason for your answer.
B. ΔH solution of NaI is – 7.50 kJ / mol. Is NaI more soluble at 20 o
C or at 60 o
C? Why?
3, Assign each lattice energy value to the appropriate ionic compound.
MgI2 / LiI / NaI / MgF2 / MgO 2327 kJ / 757 kJ / 2957 kJ / 3923 kJ / 707 kJ
Answers: 1
Chemistry, 22.06.2019 08:40
Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.
Answers: 2
Chemistry, 23.06.2019 04:10
An unknown substance has been shown to have weak covalent bonds. which of the following is most likely a property of this substance? a. high ph b. high conductivity c. low melting point d. low flammability
Answers: 3
Chemistry, 23.06.2019 06:40
The combustion of methane, ch4, releases 890.4kj/mol. that is, when one mole of methane is burned,890.4 kj are given off to the surroundings. this meansthat the products have 890.4 kj less than the reactants.thus, ah for the reaction = - 890.4 kj. a negative symbolforah indicates an exothermic reaction.ch (g) + 20 (g)> co2 (g) + 2 h0 (1); ah = - 890.4 kga) how much energy is given off when 2.00 mol of ch,are burned? b) how much energy is released when 22.4g of ch. areburned?
Answers: 1
1,O2 gas contributes 21 % partial pressure in the atmosphere. What is the solubility of O2 in sea wa...
Mathematics, 01.07.2019 19:30
Mathematics, 01.07.2019 19:30
Geography, 01.07.2019 19:30
Mathematics, 01.07.2019 19:30
Mathematics, 01.07.2019 19:30
Computers and Technology, 01.07.2019 19:30
Mathematics, 01.07.2019 19:30
History, 01.07.2019 19:30
Physics, 01.07.2019 19:30
Mathematics, 01.07.2019 19:30
Mathematics, 01.07.2019 19:30
Mathematics, 01.07.2019 19:30
English, 01.07.2019 19:30