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The number of neutrons in an atom is equal to the :
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Which of the following is a renewable source of energy
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How is a chemical change different from a physical change
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which diseases are caused by artificial food colours
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Which diseases are caused by artificial food colours? Write answers to the question.
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compounds such as alcohol and glucose also contain
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compounds like alcohol and glucose also contain hydrogen but are not categorised as acids, discuss an activity to prove it.
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state two applications of universal law of gravitation
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State three applications of universal law of gravitation?
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the ionisation enthalpy of hydrogen atom is 1.312
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The ionization energy of hydrogen atom is 1.312 into 10 raise to power 6 joule/mol
calculate the energy required to excit and electron in a hydrogen from ground state to …
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classify the following as physical and chemical changes
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Classify the following as chemical or physical changes:
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• boiling of water to form steam, …
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At what temperature are Celsius and Fahrenheit equal?pls answer this pls
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1.State the colour of phenolphthalein in soap solution.
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the ionization enthalpy of hydrogen atom is 1.312
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The ionization energy of hydrogen atom is 1.312 into 10 raise to power 6 joule/mol
calculate the energy required to excit and electron in a hydrogen from ground state to …
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why are food items packed in aluminium foil
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Why are food items packed in aluminium foils
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explain how offspring and parents of organisms reproducing
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electron dot structure of sodium oxygen and magnesium
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(i) Write the electron-dot structures for sodium, oxygen and magnesium.
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What are the two holes in the nose called?
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Which of the following is not a fossil fuel?
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Write any three difference between mass and weight
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What are the main components of an electric circuit
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