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N=a+bT^2
1 answer
340 views
Two force,3N and 4N act on a body in the direction due north and east respectively. Calculate their equilibrium?
2 answers
625 views
Pb3(ASO4)2.the solubility product expression
2 answers
997 views
Idemtify 3 enviromental health hazards that causes ill health,accidents,crises and disaster within a community in South Africa
0 answers
1,010 views
A car is moving at a constant velocity when it is involved in a collision.the car comes to rest after 0.45sec with an average
0 answers
939 views
The time required by workers to complete an assembly job has a mean of 50 minutes and a standard deviation of 8 minutes. To spot
1 answer
1,160 views
Malaan is travelling from Makhado to Polokwane by taxi at a speed of 120km/h.A Nissan bakkie passes the taxi while it is on its
2 answers
509 views
Skeletal structural formulas of pentane,2 methyl butane and 2,2 dimethyl propane
0 answers
698 views
Write down (a) condensed and (b) skeletal structural formulas for isomers of an organic substance whose chemical formula has 5
1 answer
883 views
1)Define the term'geometric isomers'
2)Give geometric isomers and corresponding names for the following condensed structural
1 answer
848 views
Define the terms 'weak acid' and 'catenation'
1 answer
479 views
Calculate the pH of 0.0115M acetic acid solution at 25 degrees celcius with Ka=1.75*10^-5
2 answers
499 views
Calculate the pH of 0.0115M acetic acid solution at 25 degrees celcius with Ka = 1.75*10^-5
0 answers
558 views
Glycine is the amino acid used to make proteins
a)for each mole of glycine that burns,973.49k/mol of which is libarated eqution
0 answers
591 views
Calculate the enthalpy of combustion of acetylene(per mol acetylene) using bond enthalpies and energy diagram
0 answers
1,195 views
Calculate the enthalpy of combustion of acetylene(per mol acetylene)using bond enthalpies and energy diagram
0 answers
633 views
Using the form of energy diagram,make a concept map of the two different methods of calculation of reaction enthalpy(via the
1 answer
1,134 views
Calculate using the enthaly of formation,the enthalpy of combustion of methanol,CH3OH
1 answer
1,657 views
What is the boiling and freezing points of celsius scale and kelvin
1 answer
847 views
Wrap a cotton wool around a thermometre,will its temperature rise? Explain your answer please
2 answers
438 views
A piece of metal has a density of 0.20g/cm^3.what is the volume in cm^3 of a 1g sample of a substance?
1 answer
461 views
a)Hydrogen has a much higher specific heat capacity than milk. What can you say about the specific heat capacity of
1 answer
604 views
When water falls from the top of the waterfall,at the victoria falls in zimbabwe,the temperature of the water at the top is less
1 answer
695 views
Xenon is one of the noble gases, and is generally quite unreactive.in fact,it was long believed that all the noble gases were
0 answers
621 views
Standard enthapies of formation are not always like bond enthalpies.Explain
0 answers
882 views
Use the bond enthalpies and bond energies from the data book in themochemical equations to calculate the reaction enthalpy
0 answers
574 views
Use the bond enthalpies and bond energies in the data book in themochemical equations to calculate the reaction enthalpy of:
1 answer
628 views
By using the bond enthalpies and bond energies in thermochemical equations to calculate the reaction enthalpy of; H + Br=2HBr
0 answers
605 views
State whether each of the following will increase,decrease or unchange when catalyst is added to the reaction and give an
1 answer
642 views
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