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Questions (16)
Solid S has the following properties:
I :It is insoluble in water. II :It produces a gas when heated. III: It produces a gas when
1 answer
457 views
Which ion reacts with aqueous sodium hydroxide to give a precipitate that dissolves in an excess of sodium hydroxide?
A Ca2+ B
1 answer
562 views
Aqueous ammonia reacts with aqueous solution of metal ion X to produce a coloured
precipitate. The colour of the precipitate
2 answers
870 views
X is a solution containing both sodium chloride and sodium sulfate. Three of the following solutions will produce a white
0 answers
597 views
Aqueous sodium hydroxide is added to a mixture of an aqueous solution of X with some aluminium alloy. On warming, ammonia gas is
0 answers
618 views
A solution reacts with calcium carbonate to produce a gas. It does not produce a precipitate with either aqueous barium chloride
0 answers
463 views
A solution x forms a white precipitate with dilute sulfur in acid and also with aqueous silver nitrate. What could solution x
0 answers
666 views
In which solutions will a white precipitate be observed when aqueous copper (ii) chloride is added to it?
A) Sodium hydroxide B)
1 answer
672 views
How many atoms are present in one formula unit of calcium hydrogen carbonate Ca(HCO3)2?
Could someone explain to me why the
2 answers
7,029 views
Written as the product of its prime factors, 360=2^3 times 3^2 times 5. So find the smallest positive integer k such that 360k
1 answer
610 views
a) Find the gradient of the line x/7+y/11=1.
b) the straight line Y=mx+c is parallel to the line y+ 5/3x=7/3 and passes through
1 answer
532 views
a) Find the gradient of the line x/7+y/11=1.
b) the straight line Y=mx+c is parallel to the line y+ 5/3x=7/3 and passes through
1 answer
396 views
Solve the equation 5x^2-5x-63=0 by using the "complete the square" method. Give your answer to 2 decimal place.
Please show me in
2 answers
637 views
Solve the equation 5x-3y=14 and 3x+5y=18 using substitution.
The ans is x=3 11/17 and y= 1 7/17 I couldn't get the above answers,
2 answers
1,652 views
The cover plate is removed from the gas jars shown iin the diagram. Nitrogen dioxide is a brown gas. After several days, the
1 answer
2,943 views
Solve the equation e^x-10=10. Do I have to change it to log form? What do I do after that?
1 answer
355 views
Answers (3)
Give the rewards when they get the questions right! It should help:)
Maybe you could go on YouTube for some fun songs that teach counting, there are a lot of them! Or perhaps use flashcards to teach her, she needs to understand before she can practise. You certainly can't wait until she is ready, children mostly want to
Gu Zheng is a Chinese instrument. It is a string instrument if I am not wrong.
