kabelo

This page lists questions and answers that were posted by visitors named kabelo.

Questions

The following questions were asked by visitors named kabelo.

if the stress strai graph is a straight line,how much does the bar srtetch when applied force is increased by 50000N?

if 23.74ml of 0.01470M NaOH are required to completely neutralize 25.00ml of gastric juice,calculate the concentration of the hydrochloric acid[in g/L]in stomach gastric juice

what is the function of an indicator in a titration

a 0.1M NaOH solution has been prepared for you.Describe how you would prepare 1 litre of the same solution

please help with heat calculations that include the melting of ice

the following names are incorrect,draw their structures and supply the correct name.(a)2-isopropylpentane (b)3-ethyl-5-methylhexane

please help with a website that talks about the misconsumption of electricity and their corrections

a copper wire has a diameter of 1.02mm,the wire carries a constant current of 1.67A,the density of the free electrons is 8.5X10^28 e/m^3.calculate the current density and drift velocity

two llong parallel vertical wires 0.3m apart are placed east-west of one another.The current in the eastely one is 30A and that in the other is 20A.Both currents flow upwards.The earth"smagnetic field is horizontal directed north and has magnetude field B...

a large number of hydrogen atoms have electrons excited to the n_h=4 state.How many possible spectral lines can appear in the emission spectrum as a results of the electron reaching the ground state(n_1=1)?

what dominant colour appears for(a)the mecury street bulb (b)the sodium street lamp and (c) an incandescent bulb?

the major commercial aluminium ore is bauxite,AlO3.H2O(s).What is its molar mass?The analysis of a representive sample of bauxite shows it contains 70% by mass of Al2O3..What is the maximum mass of aluminium metal that could be obtained from 200kg of baux...

write equations for the reactions of NaOH(aq) with solutions containing Al^3+ Cu^2+(aq),Pb^2+(aq) and Fe^3+(aq) ions respectively

what subshells would be found in the shells with n=3 and n=4?how many orbitals are there in a g subshell?

1) A 3-fold degenrate subshell can carry a maximum number of how many electrons?

consider a simple harmonic oscillation with m=0.5kg, k=10N/m and amplitude A=3cm.WHat is the total energy of the oscillation,what is the maximum speed,what is the kinetic energy?

why is the 5th ionisation energy(IE) of carbon so much larger than its 4th?

why is the ionisation energy of oxgen less than that of nitrogen even if oxygen is to the right hand side of nitrogen?

for an oxygen atom,wich requires more energy,tha addition of two electron or the removal of one electron?explain why

a pendulum of length L=9.8m hangs in equilibrium and is given velocoity v=0.2m/s at its lowest point.What is the magnitude of the subsequent oscillation?

what is the minimum number of electrons that would be expected to be in the valence shell of As in AsCl

two notes wich have frequency ratio 2:1 are said to be separated by an octave.A frequency wich is separated by an octave from middle C(256Hz) is?

(a)explain why the colour for ions in the flame tests differ (b)Why do the chemicals have to be heated in the flame first before the colour light is emitted?

what is the characteristic flame for sodium,lithium,barium,copper and calcium?explain why

find the ratio of the intensities of two sounds if one is 8 dB louder than the other

two cars are heading at each other with the same speed v. The horn of one (f=3000Hz) is blowing,and is heard to have a frequency of 3400Hz by the people in the other car.Find v if the speed of sound is 344m/s

explain why you get two different pH values for same solution when calculating and using pH meter of same solution?

these is 0.1M HCl of 100ml of that solution in a beaker,calculate pH?

calculate pH of 0.1M CH3COOH of 100ml of that solution?

what is the [CH3COO^-]/[CH3COOH] ration in an acetate buffer (Ka=1.76 x 10^-5) at pH 3.8? show calculations

Phosphoric acid is a triprotic acid with pKa's of 2.14, 6.86, and 12.4.The ionic form that predominates at pH 3.2 is?choose the corect answer (a) H3PO4 (b) H2PO4^- (c) HPO4^2- (d) PO4^3-

If a solution were made by mixing equal volume of 0.1M acetic acid(HA) and 0.1M Na-acetate(A^-) what pH would it gives?

describe an alternative method to prepare a 0.2M potassium phosphate buffer using KH2PO4 and KOH

a weak acid has a pKa of 6.0. what is the ratio of conjugate acid to conjugate base at pH 5?

for each of these qualitative test,barfoed test,benedict test,seliwanoff test,bial test,molisch test,and iodine test, describe the class and give aspecific example of a carbohydrate that would yield a posiyive result?

please help with a link to scientific articles about metabolic demands of excercise in cardiovascular system

Identify one evironmental or human factor that causes ill health, accidents and disasters in south africa? *in 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts in south africa.

A 250 cc motorbike must accelerate from rest to 126 km/h in 150 m in 10 seconds. Draw a velocity/time graph of the movement. (Hint: change km/h to m/s

If a person has a mass of 83 kg, what will that person weigh in newton

3 environmental health hazard that cause ill health, crises, and or disasters within your community or any other community within south Africa and globally?

identify two contenporary social issues in your community

Explain clearly how intrapersonal conflict can be addressed through engaging in physical exercises,counsellingand self talk

What are careers of general geography?

a client invests 100 000 with an interest rate of 8% with quarterly compound what will the interest be after a year

Method for the estimation of potassium in potassium trioxalatoaluminate(III).

impact of riskon physical teenage behavior

Answers

The following answers were posted by visitors named kabelo.

dr i can't see what you wrote here

DR i can't see what you wrote here

so wich one between the addition of two electrons or removal of an electron will requere more ionisation energy

so wich one between the addition of two electrons or removal of an electron will requere more energy

then what must i do after i have the Ka of CH3COOH

To what extent can intrapersonal conflict affect choice of a career?

I can be able to be ceo

I can be able to be ceo12

of.the mine winch drum diameter is 6 m,calculate how far the cage will drop for each single rotation of the drum❓