Questions and answers by

Lakydo Wepson

Questions (37)

Reaction of copper with acids.1 Drop a piece of copper foil into a test tube containing concentrated nitric acid. Describe what
1. 1 answer
2. 102 views
Reaction of copper with acids.1. Drop some copper fillings into a test tube of dilute hydrochloric acid. Describe what
1. 1 answer
2. 128 views
1.What are some benefits of professional code of ethics in commitment to colleges? What are some of adverse effectively if not
1. 3 answers
2. 108 views
Write a conclusion and recommendation base on Assessment, Topics and Lesson Summary in critical evaluation of Senior High School
1. 1 answer
2. 141 views
How to improve standard base curriculum in senior high school chemistry and teachers guide.
1. 3 answers
2. 186 views
How to improve Content Units in Standard base Curriculum for chemistry.
1. 1 answer
2. 109 views
Write the essay base on the extraction of nickel and cobalt from its mineral ore. Provide also citation and reference .
1. 1 answer
2. 108 views
Write the essay base on the extraction of nickel and cobalt from its mineral ore
1. 1 answer
2. 97 views
Write the essay base on the extraction of nickel and cobalt from its mineral ore.
1. 1 answer
2. 111 views
Make a recommendation and conclusion in impact of AI in learning and teaching in PNG
1. 1 answer
2. 98 views
How can you recommend and make a conclusion in impact of AI in learning and teaching in PNG.
1. 1 answer
2. 98 views
Provide some points of how AI creates supportive learning in PNG.
1. 1 answer
2. 87 views
How AI create supportive learning in PNG.Note. Provide 2 paragraph with citation
1. 1 answer
2. 124 views
How do AI create supportive learning in PNG
1. 1 answer
2. 90 views
Give an example of AI enhancing teaching practices
1. 5 answers
2. 109 views
Write the essay on topic given below.Topic. Impact of AI in teaching and learning in Papua New Guinea. Note. Also provide
1. 1 answer
2. 129 views
Write me descriptive essay of topic base on Artificial Intelligence in Learning and Teaching.
1. 1 answer
2. 140 views
Calculate the oxidation state of the central ion in each of coordinate compound.a).[Pt(en)2Cl2]2+ b).Mg3[ CrCl5Br]2 c).
1. 7 answers
2. 195 views
Calculate the oxidation state of the central ion in [CoCl4(NH3)2]-1
1. 1 answer
2. 144 views
In which compound does Cr exhibit greater non-metallic behavior, Cr2 or CrF6? Explain your answer.
1. 1 answer
2. 111 views
how Sm many upaired electrons are in (Z=62) and write the electron configuration of Sm3+ ion.
1. 1 answer
2. 112 views
Write the electron configuration for Sm (Z=62) and how many upaired electrons
1. 3 answers
2. 109 views
In which compound does Cr exhibit greater non metallic behavior, CrFe2 or CrF6? Explain?
1. 3 answers
2. 128 views
Give the coordination number and oxidation state of the central metal ion in each of coordination compound.a.[CoCl4(NH3)2]^-
1. 3 answers
2. 256 views
Write the formula of the following complexes.a).Pentaamminenitritochromium(III) ion b).Tris (ethylene-1,2-diamine) cobalt (III)
1. 11 answers
2. 212 views
The vapour pressure of dichloromethane at 24.1°C is 53.3 kPa and it's enthalpy of vaporization is 28.7 kJ/mol.Estimate the
1. 13 answers
2. 238 views
Calculate the standard Gibbs energy of the given reaction at 25°CCO(g) + half CO +CO2
1. 3 answers
2. 142 views
For the galvanic cell ,Pt |Br2||Fe2+, Fe3+| Pta).write equation for the reaction at the left- hand and right - hand electrode
1. 1 answer
2. 197 views
A voltaic cell is constructed using Al and Al3+ in one half- cell and Ag with Ag+ in the other half-cell.A).Write the half-cell
1. 3 answers
2. 263 views
A).What is a salt bridge? Explain its function in electrochemical cell.B). Outline the basic difference between a galvanic cell
1. 1 answer
2. 244 views
Preparation of magnesium hydroxideMagnesium hydroxide in a white insoluble solid that is used as an antacid to relieve upset
1. 19 answers
2. 259 views
Calcium carbonate is white is insoluble solid occurring naturally as chalk, limestone, marble and calcite.It is a useful
1. 1 answer
2. 139 views
Magnesium carbonate is white is insoluble solid occurring naturally as chalk, limestone, marble and calcite.It is a useful
1. 1 answer
2. 151 views
At 85 degrees celsius and 760 torr, what are the amount of substance in the liquid and vapour phase when heptane is equals to
1. 3 answers
2. 96 views
Which of the two (hexane or heptane) liquids is volatile in pressure /composition diagram.
1. 2 answers
2. 116 views
Estimate from the figures the mole fraction of hexane in liquid and vapour phase .
1. 1 answer
2. 127 views
Use the diagram provide to answer the questiona). Which of the two liquids is volatile
1. 7 answers
2. 154 views

Answers (35)

A.Reaction of iron with acids 1.Drop some iron filling into a test tube of dilute hydrochloric acid. Describe what happens. I). When reaction stops, note the color of the solution. ii). Have Fe3+ or Fe2+ formed iii). Write an equation for this reaction.
Write one paragraph conclusion base on these four professional code of ethics; commitment to students, commitment to the profession,commitment by the community and commitment to the colleagues. The conclusion must be suggestion/recommendation and the main
Critical evalution of standard base curriculum in senior high school chemistry and teachers guide for Chemistry unit content.
Write me a eassy topic base on AI enhancing teaching practices. Also provide citation in paragraphs.
Give an example of AI enhancing teaching practices.Provide citation also
How many upaired electrons are in SM(Z=62).
Which oxide, CrO3 or CrO, is more basic in water? Why
Give the coordination number and oxidation state of the central metal ion in each of coordination compound. a.[CoCl4(NH3)2]^- b.Pt(en)2Cl2]^2+ c.Mg3[CrCl5Br]2 d.K[Co(H2O)2(C2O4)2] e.[Ru(H2O)2(NH3)2Cl2]Br
Write the formulae of the following complexes a.Tetraamminediaquacopper(II) sulfate b. Pentaamminenitrito-N-cobalt(III) c. Tetra(cyano)ferrate(II) d. Dicopper(II)cynoferrate(II)
Write the formulae of the following complexes a.Tetraamminediaquacopper(II) sulfate b. Pentaamminenitrito-N-cobalt(III) c. Hexacyanidoferrate(II) d. Dicopper(II) hexacyanidoferrate(III)
Name the following complexes using the IUPAC naming system. a.[Cu(NH3)4(H2O)2]SO4 b.[Co(NH3)5NO2]2+ c.[Fe(CN)6]4- d.Cu2[Fe(CN)6]
Name the following complexes using the IUPAC naming system. a.[Cu(NH3)4(H2O)2]SO4 b.[Co(NH3)5NO2]2+ c.[Fe(CN)6]4- c.Cu2[Fe(CN)6]
Name the following complexes using the IUPAC naming system. a.[Cu(NH3)4(H2O)2]SO4 b.[Co(NH3)5NO2]2+ c.Cu2[Fe(CN)6]
Pure methylbenzene and octane have vapour pressure of 4.65*10^4 and 1.15 *10^5 respectively. a).What is the composition of liquid mixture that boils at 350K at a pressure of 1atm b). Compute the total vapour pressure resulting from boiling. c). What is the
For a mixture of two liquids A & B of differing volatility, their vapour pressure are PA and PB respectively. a). Express the total pressure P in terms of partial pressure of pure A & B, and mole fraction A,is XA b). Write an expression in terms of XA (ie
The difference in chemical potential between two regions of a system is -0.82kJ/mol. By how much does the Gibbs energy change when 50 moles of substance is transferred from one region to another?
The difference in chemical potential between two regions of a system is -0.82kJ/mol. By how much does the Gibbs energy change when 59 moles of substance is transferred from one region to another?
The partial molar volume of water and enthanol in a solution with Xwater=0.45 at 25°C are 17.0 and 57.5 cm³/mole respectively.Calculate the volume change upon mixing sufficient ethanol with 3.75 moles of water to give this concentration. [P water
What do you understand by the concept of partial molar quantity in thermodynamics? Use partial molar volume as an example to explain.
Calculate the standard Gibbs energy of the given reaction at 25°C CO(g) + half CO(g) =CO2
Calculate the standard Gibbs energy of the given reaction at 25 °C CO(g)+0.5 O2 =CO2
Mg reacts with Mg(NO3)2 and forms MgSO4 Balanced equation Net ionic equation
Magnesium sulphate (Epsour salt) is soluble solid that is used as an mild laxative in causing movement of bowels in human.Prepare a solution of magnesium sulphate. Obtain it as a solid a). Method b).Balanced equation c).Net ionic equation b).Observation
Preparation of barium sulphate Barium sulphate is an insoluble solid used as a paint pigment and in the "barium meal" taken for certain types of X-ray photography.Prepare the solid A).Method B).Balanced equation C).Net ionic equation D). Observation
CaCl2 reacts with H2SO4 and forms CaSO4 Write the balanced equation and Net ionic equation
What properties of calcium sulphate make it suitable for the use in plaster.
Preparation of calcium sulphate Calcium sulphate is slightly soluble solid that is used to make plaster.Prepare the solid.Mix solution well-the reaction may be slow to occur A).method B).Balanced equation C).Net ionic equation D).Observation
Formula for barium sulphate
When CaCl2 reacts with Na2CO3 and forms CaCO3 A).Write the balanced equation and net ionic equation
When Mg(NO3)2 reacts with NaOH and forms Mg(OH)2 A) write balanced equation B).Net ionic equation
For a solution containing 1 mole each of hexane and heptane (a),estimate the vapour pressure in torr at 70 degrees celsius when vaporization on reduction just begins...(b).what is the vapour pressure of the solution at 70 degrees celsius when one drop of
Which of the two (hexane or heptane) liquids is volatile in pressure /temperature composition diagram.
What is the vapour pressure of the solution at 70 degrees celsius when just one drop of the liquid remains
For a solution containing 1mole each of hexane and heptane, estimate the vapour pressure in torr at 70°C when vaporization on reduction of external pressure just begins.
Which of the two liquids is volatile.Hexane or heptane in pressure/temperature composition diagrams.

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