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[Day 1 Q4] This question is part of Board Stoichiometry Mania 2020. Answer this question now and stand a chance to win a pair of Apple Airpods!
When a lamp is plugged in and switched on, the fuse melted immediately.What is the best explanation for this?A. The live wire touched the neutral wire of the lampB. The live wire touched the plastic surface on the lamp.C. The live wire and the neutral wire are swapped with each other. D. The neutral wire is broken.
The diagram shows a sector POQ of a circle, centre O, radius r cm, where angle POQ = Θ radians. The perimeter of the sector is 20cm. Show that the area, A cm^2, of the sector is given by A = 10r - r^2.
Complete decomposition of 3.40 g of the nitrate gives 240 cm3 of oxygen, measured at room temperature and pressure. What is the relative atomic mass of X?
Upon strong heating, a metal nitrate compound undergoes decomposition according to the following equation 2XNO3 (s) → 2X (s) + 2NO2 (g) + O2 (g) Complete decomposition of 3.40 g of the nitrate gives 240 cm3 of oxygen, measuredat room temperature and pressure. What is the relative atomic mass of X?
Mr Lim paid an income tax amount of $2545 for his income earned in 2017. Calculate his amount of chargeable income in 2017.