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Ghana
\( x_{1} \) if \( \frac{1}{3} x+1 \frac{2}{3}<-\frac{3}{4} x-\frac{1}{2} \)
Algebra Mar 03, 2025
Simplify \( \left(1 / 3^{x}-2\right)^{-1 / 2} \) using binomial theorem
Algebra Mar 03, 2025
Simplify \( \left(1 / 3^{x}-2\right)^{-1 / 2} \)
Algebra Mar 03, 2025
Find the sum of the following infinite geometric series, if it exist. \( 0.31 \dot{7} \)
Pre Algebra Mar 02, 2025
Question 3 The moxocarbonate (IV) content of a sample may be determined by dissolving in an acid and estimating the excess acid by titration. A is an aqueous solution obtained by dissolving 10.0 g of an impure trioxocarbonate (IV). \( \mathrm{MCO}_{3} \) iti \( 100 \mathrm{~cm}^{3} \) of \( 3.0{\mathrm{~mol} \mathrm{Mm}^{3}}^{\mathrm{M}} \mathrm{dm}^{3} \mathrm{~mol} \) hydrochloric acid solution and making up the solution to \( 1 \mathrm{dm}^{3} \) with distilled water. \( B \) is a solution of sodium hydroxide containing 5.2 g of NaOH per \( \mathrm{dm}^{3} \) of solution. \( B \) was put in the burette and titrated against \( 25 \mathrm{~cm}^{3} \) portions of \( A \), using methyl orange as indicator: Average volume of \( B \) was \( 20.30 \mathrm{~cm}^{3} \) Calculate the i) concentration of HCl in A in mol. \( \mathrm{dm}^{-3} \) ii) amount in moles of HCl initially present. iii) Amount in moles of HCl which reacted with the sample: iv) Percentage purity of the sample if the retative molecular mass of \( \mathrm{MCO}_{3} \) is 84. Auswer
Chemistry Mar 02, 2025
Using a scale of 2 cm to 2 units on both axes, draw on a graph sheet two perpendicular axes Ox and \( O \) y for \( -12 \leq x \leq 12 \) and \( -10 \leq x \leq 10 \), draw the (i) shape IFXYZ with coordinates W \( (-6,2), \mathrm{X}(-3,3), \mathrm{Y}(-2,6) \) and \( \mathrm{Z}(-2,2) \). (ii) image \( W_{i}, X, Y, Z ; \) of \( W X Y Z \) under a refloction in the \( y \)-axis. (iii) image \( \mathrm{W}_{2} \mathrm{X}_{3} \mathrm{Y}_{2} \mathrm{Z}_{2} \) of \( W X Y Z \) under an anti-clockwise potation of \( 90 \% \) about the origin.
Geometry Mar 01, 2025
Find the value of \( 3^{3}+2^{3}-7^{0} \) A. 8 B. 14 C. 34 D. 35
Arithmetic Mar 01, 2025
In a class of 30 students, 18 take Mathematics, 5 take both Mathematics an Biology and 8 take neither Mathematics nor Biology. Find the number of students that take Biology? \( \begin{array}{ll}\text { A) } 6 & \text { B) } 8 \\ \text { C) } 13 & \text { D) } 9\end{array} \)
Statistics Mar 01, 2025
14. Fifteen boys took 12 hours to weed a plot of land. If nine boys work at the same rate, how long will it take them to weed the plot of land? \( \begin{array}{ll}\text { C) } 11 \frac{1}{4} & \text { B) } 7 \frac{1}{5} \text { hours } 12: 15=2\end{array} \)
Arithmetic Mar 01, 2025
A woman buys 3 exercise books at Ghc 0.4 each and 9 exercise books at Ghc 0.2 each. What is the average cost of an exercise book? \( \begin{array}{ll}\text { A) Ghc } 0.35 & \text { B) Ghc } 0.30 \\ \text { C) Ghc } 0.22 & \text { B }\end{array} \)
Arithmetic Mar 01, 2025
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