Question

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Answer 1

4. The law which a balanced equation must comply.

$\boxed{\fcolorbox{red}{blue}{Answer}}$ Every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed.

5.An aggregate of protons and neutrons witin an atom.

$\boxed{\fcolorbox{red}{red}{Answer}}$Mass number: Symbol A, the sum of the number of protons and neutrons in the atom. ... Element: A substance composed of atoms all of which have the same atomic number, i.e. the same number of protons in the nucleus, and thus the same number of electrons. The atomic number defines the element.

7.Ametal which catches fire in water and produce sodium hydroxide.

$\boxed{\fcolorbox{red}{lime}{Answer}}$Sodium metal reacts rapidly with water to form a colourless solution of sodium hydroxide (NaOH) and hydrogen gas (H2). The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic.

8.The amount of solute which can dissolve in 100 gm of water at given temperature.

$\boxed{\fcolorbox{red}{beige}{Answer}}$The maximum amount of solute that will saturate 100g of solvent at that temperature is known as solubility.

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