He set up his periodic table by the atomic mass
Answer:
A particle
Explanation:
Modern quantum theory holds that light has both wave-like and particle-like properties. When the length scales involved are large compared to the wavelengths of light (ex., forming images with thin lenses), the
particle nature of light dominates.
Answer:
C. August, September, October
Explanation:
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The question is incomplete, here is the complete question:
A nuclear fisston reaction has mass difference between the products and the reactants of 3.86 g. Calculate the amount of energy released by the reaction.
A) 1.16 * 10^6 * J
B) 2.59 * 10^9
C) 3.47 * 10^ 14 * J
D) 4.82 * 10^17 J
<u>Answer:</u> The amount of energy released by the reaction is
<u>Explanation:</u>
To calculate the energy released, we use Einstein equation, which is:
where,
= mass defect = 3.86 g = 0.00386 kg (Conversion factor: 1 kg = 1000 g)
c = speed of light =
Putting values in above equation, we get:
Hence, the amount of energy released by the reaction is
The correct option is B.
Phenophtalein is an indicator that is usually used in acid base titration experiments. Indicators are substances that undergo distinct, observable changes when the pH of their solutions change. Indicators exhibit changing of colors depending on the pH of the solution in which they are found. They are usually weak bases and acid which are capable of partial dissociation and formation of ions when dissolved in water. There are different types of indicator and phenophtalein is one of them. Phenophtalein is colorless in acidic solution and pink in basic solutions.