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Catalyst - A substance which increases the rate of a chemical reaction. The catalyst is chemically unchanged at the end of the reaction
Enzyme - A biological catalyst. Enzymes are protein molecules
Oxidation - Gain of oxygen or loss of hydrogen
Reduction - Loss of oxygen or gain of hydrogen
Oxidising agent - A substance that oxidises another substance in a redox reaction. An electron acceptor
Reducing agent - A substance that reduces another substance in a redox reaction. An electron donor
Oxidation - Loss of electrons
Reduction - Gain of electrons
You want to do % quicker?
Think of it like this: 32% of 50 = 50% of 32 ||
84% of 25 = 25% of 84. || 30% of 100 = 100% of 30...
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Mokhoenyana ha a ea lokela ho thetsa(touch) Mohoehali hobaneng?
Ngoana oa sehlola o bitsoang?
Explain these tests:
1. Test for reducing sugars
2. Test for protein
What is the disease Cancer?
What factors can cause mutation?
What is the difference between a shareholder and a debenture holder?
Explain the importances of production of penicillium using fungus penicillin
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How do you remember reactivity series of metals?
please - pottasium
send - sodium
cats - calcium
monkeys - magnesium
and - aluminum
zebras - zinc
in - iron
their - tin
lovely - lead
happy - [hydrogen]
cages - copper
made of - mercury
silver & -silver
gold - gold
How to remember Metals reactivity series?
"Popular Scientists can make a zoo in less humid countries more satisfactorily gold. "
P - Potassium (K)
S - Sodium (Na)
C - Calcium (Ca)
M - Magnesium (Mg)
A - Aluminium (Al)
Z - Zinc (Zn)
I - Iron (Fe)
L - Lead (Pb)
H - Hydrogen (H)
C - Copper (Cu)
M - Mercury (Hg)
S - Silver (Ag)
G - gold (Au)
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Q: Why are Atoms Neutral?
A: Ntho e neural ke e nang le ntho tse sa ts'oaneng tse hlabanang tse lekanang ka lenane. Mohlala, u ka re motho ntlo ea hae e neutral haeba a na le katse tse tharo le lintja tse tharo.
Ha re tla ho li atom, ka hara atom ho na le ntho tse peli tse fapaneng. E leng electrons (-ive) le protons (+ve). So when an atom is neutral, it has equal number of protons to electrons.