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an unknown mass x of sodium carbonate is dissolved in a 200 cubic centimetres of distilled water. in a titration15 cubic centimetres of the solution was used to neutralise 24 cubic centimetres to neutralise 24 cubic centimetres if a 0.12 mol.dm3 hydrochloric acid solution.1. determine the concentration of sodium chloride solution?2. calculate the unknown mass x?3. what is the appropriate indicator for the solution.
1.
sodium chloride concentration? You sure? (0,07 mol.dm-3)
2.
2,0352g
3.
strong acid + weak base
indicator = methyl orange
(i will check with the developers if images can be allowed here. Then I will upload my full solution.)
Answered by V. Gokal
Mathematics
Posted by tebatso
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is zero a number? If zero is a number why they say that any number to the exponent zero is one, but when you use zero to the exponent zero it gives you error?
This is a very long explanation!
Regarded as indeterminate.
Google it. You get some crazy explanations!
Answered by V. Gokal
Physics
Posted by karin H kelder,Derick Govender and Jagathesan Govender
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Explain briefly hw doppler effect functions nd what it may be used for?
example:
If a car approaches with a siren on, each new pulse from the siren has a shorter and shorter distance to travel to reach you (the car is getting closer to you). This creates a higher frequency of pulses for the listener. Hence a higher frequency is heard.
Uses include:
1) to measure the rate of blood flow
2) or the heartbeat of a foetus in the womb
3) speed traps (radar type)
4) used to measure the speed at which stars and galaxies are approaching or receding from us
Answered by V. Gokal
Mathematics
Posted by Faaizah Kader
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Some take pi as 22/7 which will be termed a rational number. Some take it as 3.14.... non-recurring or non-terminating. That be irrational.Question to anybody interested in answering: What do we classify pi as??? Which value do we introduce from point of initiating it's use?P.N: Grades 8 and 9 learners do not use programmable calculators that have the pi button.
Pi is rational. An answer to my own question.
Answered by Faaizah Kader
Physics
Posted by V. Gokal
To use DualView ....
preferred browsers
1) Chrome (all OS)
2) Edge (Windows 10)
Answered by Pending
If you are unsure about the answer, please allow another user to reply.
Business Studies
Posted by Lubbe
Greetings may it be possible for the business studies teachers to post some tests for the learners to engage in as it may benefit us?
Answered by Pending
If you are unsure about the answer, please allow another user to reply.
History
Posted by Elder Etieneobong Ekereuke
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Who was the First National President of The Apostolic Church Nigeria?
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What is the ester used to give the smell of icecream ?🍦
Vanillin-a flavouring agent
Answered by Phyllistar
Chemistry
Posted by shubham
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demo
Hi!
Demo answer.
Answered by V. Gokal
Physics
Posted by Shankar
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What is a "retarding force"? I've seen this in a couple of past year papers and was not sure what they meant. They mostly asked it like :" Find the retarding force... "
A retarding force is a force that is opposing the motion of the object.
A good example would be friction force.
Answered by V. Gokal
Physics
Posted by Vilashni
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when working withthe mechanical energy formulae , how do you kmow when to indicate potential energy as zero?
The "h" is zero.
Or there is no height h in the question.
Answered by V. Gokal
Accounting
Posted by Jaya Gupta
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question by jaya account
testing answers by another account
Answered by Honey Gupta
Business Studies
Posted by Jaya Gupta
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dfgdfgdf fgdfgfg dfgfgdfgdf
hello this is my answer corrected my jaya account
google.com Please be aware of malicious links that may be posted, the full adress name is pasted here for you to see.
Answered by Honey Gupta
Accounting
Posted by Jaya Gupta
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what is account?
account is a subject
Answered by Jaya Gupta
Posted by Meloshnee
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What is the motor effect
The motor effect occurs when a current carrying conductor experiences a force in the presence of a magnetic field.
Answered by V. Gokal
Physics
Posted by Suvan Naidu
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What does effective resistance mean ?
Effective resistance is also called total resistance.
But be careful since a question can ask for the effective resistance (total resistance) of just a parallel section of an entire big circuit. The you calculate just for that parallel.
Answered by V. Gokal
Posted by ahmedsetar
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when drawing graphs in electrodynamics for ac or dc (current and voltage). ..should we write a zero on the graph?. ..my teacher said not to
Zero is written at the origin. Not elsewhere.
You can find such examples in CatView.
Answered by V. Gokal
Physics
Posted by ahmedsetar
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in electricity when asked "what does an emf of 12V mean" how do u explain it in terms of joules per coulomb ?
12J of energy are transferred to (work done on) each coulomb of charge (per C) charge passing through the battery
(Nov 2013)
V = W/Q
Answered by V. Gokal
Physics
Posted by Y.Jaglal
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Hey E-forum!:)
Hey there!
Answered by V. Gokal
Physical Science
Posted by Meloshnee
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What is dynamic equilibrium?
The rate of the forward reaction equals to the rate of the reverse reaction. (The reaction rates have not stopped, just equalised.)