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- Starting with sodium oxide, describe how a sample of crystals of sodium hydrogen carbonate may be prepared(Solved)
Starting with sodium oxide, describe how a sample of crystals of sodium hydrogen carbonate may be prepared
Date posted: October 16, 2019.
- Study the information in the table below and answer the questions that follow:-(Solved)
Study the information in the table below and answer the questions that follow:-
(a) Complete the table by filling in the blank spaces (i) , (ii) (iii), and (iv)
(b) Identify the particles which are electrically charged
Date posted: October 16, 2019.
- A motorist left Embu for Nairobi, a distance of 240km, at 8.00a.m and travelled at an average speed of 90km/h. Another motorist left Nairobi for...(Solved)
A motorist left Embu for Nairobi, a distance of 240km, at 8.00a.m and travelled at an average speed of 90km/h. Another motorist left Nairobi for Embu at 8.30a.m and travelled at 100km/h. Find:
a)The time they met.
b)How far they met from Nairobi.
Date posted: October 16, 2019.
- The figure below represents a cone of height 12cm and base radius of 9cm from which a similar smaller cone is removed, leaving a conical...(Solved)
The figure below represents a cone of height 12cm and base radius of 9cm from which a similar smaller cone is removed, leaving a conical hole of height 4cm.
a)Calculate:
i) The base radius of conical hole.
ii)The volume, in terms of π of the smaller cone that was removed.
b)i) Determine, slant height of the original cone
ii)Calculate, in terms of π the surface area of the remaining solid after the smaller cone is removed.
Date posted: October 16, 2019.
- The table below shows properties of period three chlorides(Solved)
The table below shows properties of period three chlorides
Explain why AlCl3 solid has a much lower boiling point than MgCl2 solid
Date posted: October 16, 2019.
- Below is a table oxides of some period three elements(Solved)
Below is a table oxides of some period three elements
(a) Give the systematic name of Cl2O
(b) Explain why Na2O exists as a solid whereas SO2 is a gas at room temperature
Date posted: October 16, 2019.
- Without using a calculator, evaluate, giving your answer as a fraction in its simplest form(Solved)
Without using a calculator, evaluate, giving your answer as a fraction in its simplest form
![fig1316102019830.png](/questions/uploads/fig1316102019830.png)
Date posted: October 16, 2019.
- In the figure below, the tangent ST meets chord VU produced at T. Chord SW passes through the centre O, of the circle and intersects...(Solved)
In the figure below, the tangent ST meets chord VU produced at T. Chord SW passes through the centre O, of the circle and intersects chord VU at X. Line ST = 12cm and UT = 8cm.
a)Calculate the length of chord VU.
b)If WX = 3cm and VX : XU = 2 : 3, find SX.
Date posted: October 16, 2019.
- In terms of structure and bonding, explain why diamond is the hardest naturally occurring substance(Solved)
In terms of structure and bonding, explain why diamond is the hardest naturally occurring substance
Date posted: October 16, 2019.
- Use the scheme to answer the questions that follow:(Solved)
Use the scheme to answer the questions that follow:
(a) Identify solid N
(b) Write a balanced equation for the formation of Q
(c) Write the formula of the complex ion formed when sodium hydroxide is added to solution L in excess
Date posted: October 16, 2019.
- Triangle A1B1C1 is the image of triangle ABC under the transformation represented by the matrix If the area of triangle A1B1C1 is 140cm2, find...(Solved)
Triangle A1B1C1 is the image of triangle ABC under the transformation represented by the matrix
If the area of triangle A1B1C1 is 140cm2, find the area of triangle ABC.
Date posted: October 16, 2019.
- Simplify the expression: (Solved)
Simplify the expression:
![fig716102019808.png](/questions/uploads/fig716102019808.png)
Date posted: October 16, 2019.
- Use logarithms, correct to 4 decimal places to evaluate.(Solved)
Use logarithms, correct to 4 decimal places to evaluate.
![fig516102019805.png](/questions/uploads/fig516102019805.png)
Date posted: October 16, 2019.
- A spherical ball is 15cm in diameter. What is its surface area? (Solved)
A spherical ball is 15cm in diameter. What is its surface area?
Date posted: October 16, 2019.
- Evaluate without using tables or a calculator; (Solved)
Evaluate without using tables or a calculator;
![fig116102019752.png](/questions/uploads/fig116102019752.png)
Date posted: October 16, 2019.
- Advantages of graduation: By parametric formula with reference to a standard table.using a graphical method.....(Solved)
(i) By parametric formula with reference to a standard table using a graphical method. [4]
(ii) Outline the steps involved in graduating mortality rates with reference to a
standard table [3]
Date posted: October 15, 2019.
- What is 11.995 to the nearest tenth
A 11.9
B 12.0
C 12.1
D 12.00(Solved)
What is 11.995 to the nearest tenth
A 11.9
B 12.0
C 12.1
D 12.00
Date posted: October 15, 2019.
- Which one of the following is twenty million ten thousand two hundred and one
A 21010210
B 20001201
C 20010201
D 20100201(Solved)
Which one of the following is twenty million ten thousand two hundred and one
A 21010210
B 20001201
C 20010201
D 20100201
Date posted: October 15, 2019.
- One day, 1/4 of the female workers in a factory was absent. A total of 20 workers were absent that day. If 36 female workers,...(Solved)
One day, 1/4 of the female workers in a factory was absent. A total of 20 workers were absent that day. If 36 female workers, how many male workers were absent that day?
A 8
B 12
C 48
D 27
Date posted: October 15, 2019.
- What is v7/1/9 × (2/3)²
A 1/5/27
B 1/47/81
C 1/2/3
D 7/7/9
(Solved)
What is √7/1/9 × (2/3)²
A 1/5/27
B 1/47/81
C 1/2/3
D 7/7/9
Date posted: October 15, 2019.
- A mason planned the foundation of a hut whose radius was 7 m. If he placed a peg at a 4 m intervals, how many...(Solved)
A mason planned the foundation of a hut whose radius was 7 m. If he placed a peg at a 4 m intervals, how many pegs were used?
A 44
B 11
C 10
D 12
Date posted: October 15, 2019.
- Give the place value of digit 5 in 34.5×1.85
A Thousands
B Tenths
C Hundredths
D Thousandths (Solved)
Give the place value of digit 5 in 34.5×1.85
A Thousands
B Tenths
C Hundredths
D Thousandths
Date posted: October 15, 2019.
- Find the sum of all the prime numbers between 20 and 40
A 159
B 120
C 146
D 83 (Solved)
Find the sum of all the prime numbers between 20 and 40
A 159
B 120
C 146
D 83
Date posted: October 15, 2019.
- The area of a triangle is 108 cm². What is the length of the diagonal if one side of the rectangle is 12 cm
A 17...(Solved)
The area of a triangle is 108 cm². What is the length of the diagonal if one side of the rectangle is 12 cm
A 17 cm
B 14 cm
C 15 cm
D 13 cm
Date posted: October 15, 2019.
- A train left Mombasa at 1850h. It took five hours and ten minutes to reach Nairobi. At what time did it reach Nairobi
A 12...(Solved)
A train left Mombasa at 1850h. It took five hours and ten minutes to reach Nairobi. At what time did it reach Nairobi
A 12 noon
B 12 midnight
C 6.00 am
D 7.00 am
Date posted: October 15, 2019.
- A trapezium of lengths 30 cm and 40 cm has an area of 700 ². Find its height
A 20 cm
B 10 cm
C 30 cm
D...(Solved)
A trapezium of lengths 30 cm and 40 cm has an area of 700 ². Find its height
A 20 cm
B 10 cm
C 30 cm
D 100 cm
Date posted: October 15, 2019.
- After selling a shirt for sh 54, Kim had lost 10%. What was the buying price?
A sh 50
B sh 48.60
C sh 70...(Solved)
After selling a shirt for sh 54, Kim had lost 10%. What was the buying price?
A sh 50
B sh 48.60
C sh 70
D sh 59.40
Date posted: October 15, 2019.
- A hare runs at a speed of 20 m/s. Express this in km/h
A 80 km/h
B 72 km/h
C 90km/h
D 18km/h (Solved)
A hare runs at a speed of 20 m/s. Express this in km/h
A 80 km/h
B 72 km/h
C 90km/h
D 18km/h
Date posted: October 15, 2019.
- The angles of a triangle are 3n, n+50° and 2n-20°. What is the smallest angle of the triangle
A 75°
B 25°
C 55°
D 30°(Solved)
The angles of a triangle are 3n, n+50° and 2n-20°. What is the smallest angle of the triangle
A 75°
B 25°
C 55°
D 30°
Date posted: October 15, 2019.
- I bought a goat for sh 240 and sold it for sh 300. What was the profit as a percentage?
A 33/1/2%
B 2%
C 25%...(Solved)
I bought a goat for sh 240 and sold it for sh 300. What was the profit as a percentage?
A 33/1/2%
B 2%
C 25%
D 30%
Date posted: October 15, 2019.