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write2khin
Questions (21)
- Case scenario: explain why the likelyhood of allergies can be inherited from parent to child but the type of allergy (e.g.
0 answers
464 views
Using data in table below and S °(C2H6(g))= 229.5 J·mol-1·K-1, calculate ÄfS° for C2H6(g) in J·mol-1·K-1.
Compound S °,
0 answers
586 views
Using data in table below and S °(CaSO4·H2O(s))= 194.0 J·mol-1·K-1, calculate ÄfS° for CaSO4·H2O(s) in J·mol-1·K-1.
Comp
1 answer
665 views
A 0.10 M solution of a weak monoprotic acid has a hydronium-ion concentration of 5.0 ´ 10-4 M. What is the equilibrium
3 answers
1,190 views
Using data in table below and S °(CaSO4·H2O(s))= 194.0 J·mol-1·K-1, calculate ÄfS° for CaSO4·H2O(s) in J·mol-1·K-1.
Comp
0 answers
595 views
Using data in table below and S °(CaSO4·H2O(s))= 194.0 J·mol-1·K-1, calculate ÄfS° for CaSO4·H2O(s) in J·mol-1·K-1.
1 answer
499 views
If an amount of heat q is applied to an object and its temperature changes by ÄT, the amount of heat that must be applied to
1 answer
599 views
1. How much heat in kilojoules is needed to bring 2.00 kg of water from 27.7 to 82.6 ¡ãC (comparable to making four cups of
1 answer
786 views
Select the two conditions that must be met by a thermochemical equation so that its standard enthalpy change can be written as
2 answers
2,574 views
Consider a 790-mL container at 21 °C in which the pressure of argon is 1.98x106 Pa.
a) What mass of argon (in g) is present in
2 answers
499 views
Consider a 980-mL container at 133 °C in which the pressure of nitrogen oxide is 0.394x106 Pa.
a) What mass of nitrogen oxide
1 answer
545 views
An aqueous solution of Na2SO4 has a molal concentration of 0.293 mol kg-1. Its density is 1.0350 g mL-1.
Calculate the molar
10 answers
2,410 views
Oxygen gas can be generated by heating KClO3 in the presence of a catalyst.
KClO3 ----> KCl + O2 (unbalanced) What volume (in L)
1 answer
804 views
A pressurised can of whipped cream has an internal pressure of 1.09x105 Pa at 25.0 oC. If it is placed in a freezer at -15.0 oC,
1 answer
459 views
Two ions which have a simlar shape are?
a. CO32- and SO32- b. OH- and SO32- c. PO33- and NO3- d. SO32- and PO33- e. CO32- and
1 answer
564 views
Which of the following groups of elements is arranged in order of increasing electronegativity?
a. Br < Li < C b. K < Mg < O c.
2 answers
2,651 views
Which of the following compounds would have the highest melting point?
a. CsF b. LiF c. NaBr d. LiCl e. NaCl
2 answers
1,611 views
For a 0.001 molar solution of NH4HCO3, the van’t Hoff factor would be about
a. 1. b. 2. c. 3. d. 4. e. 5.
2 answers
1,056 views
solve x2 + 2x - 3 < 0 and graph.
Anyone can solve the problem please.
2 answers
523 views
1) All of the following are oxidation-reduction reactions except
(a) 2Al(s) + Fe2O3(s) ---> A12O3(s) + 2Fe(s) (b) (NH4)2Cr2O7(s)
1 answer
2,356 views
1) All of the following are oxidation-reduction reactions except
(a) 2Al(s) + Fe2O3(s) �¨A12O3(s) + 2Fe(s) (b) (NH4)2Cr2O7(s)
2 answers
1,188 views
Answers (5)
A 0.10 M solution of a weak monoprotic acid has a hydronium-ion concentration of 5.0 ´ 10^-4 M. What is the equilibrium constant, Ka, for this acid? a. 5.0 ´ 10^-2 b. 5.0 ´ 10^-3 c. 2.5 ´ 10^-4 d. 2.5 ´ 10^-5 e. 2.5 ´ 10^-6 2. (Points: 1) What is the
Using data in table below and S °(CaSO4·H2O(s))= 194.0 J·mol-1·K-1, calculate Delta fS° for CaSO4·H2O(s) in J·mol-1·K-1.
Compound S °, J·mol-1·K-1 C(s) 5.69 H2(g) 130.6 N2(g) 191.5 O2(g) 205.0 Na(s) 51.0 Cl2(g) 223.0 Ca(s) 154.8 S(s) 31.8
i think 2
it is to work to find the net ionic equation for question iii
