Physics
Chemistry
100
When light hits a mirror, the angle of incidence equals the angle of reflection.
Law of reflection
100
NH4OH
What is the chemial formula of ammonium hydroxide
200
The black inner surface of the eye which absorb light, and send the "message" to the brain.
What is Retina?
200
pH <7 They can be acids, reacts with stains.
Is the pH of HCl <7 or>7? Why the pH number of many cleaning products of kitchen and washroom are <7?
300
The colour of light is produced when red , orange , yellow , green , blue , inidigo and violet lights are combined.
The colour of light is produced when __, __, __, __, __, __ and __ lights are combined.
300
pH number coeeode or do not corrode metals
Two differences between ACIDS and BASES.
400
Transmitted Reflected Trabsmitted Trabsmitted Trabsmitted
When light strikes these objects, it can be absorbed, rflected or transmitted? Paper Iron Cuso4(aq) air windows
400
9 It's not in the 4 main reaction types.
C2H5OH+O2 = CO2 +H2O What is the sum of the numbers of balance chemical equation and what type of reaction is this?
500
Radio Microwaves X-rays GAMMA Rays Ultrasonic distance meter
What is 5 uses of high and low frequency waves
500
In chemistry, a salt is an ionic compound that results from the neutralization reaction of an acid and a base.[1] Salts are composed of related numbers of cations (positively charged ions) and anions (negative ions) so that the product is electrically neutral (without a net charge). These component ions can be inorganic, such as chloride (Cl−), or organic, such as acetate (CH 3CO− 2); and can be monatomic, such as fluoride (F−), or polyatomic, such as sulfate (SO2− 4).
What is Salt in Chemistry?
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