HRS - Ask. Learn. Share Knowledge. Logo

Questions in chemistry

[Done] Differentiate benzene and cyclohexane.

[Done] Solve the following problem: \[(12 \times 10^9) \div (6 \times 10^5)\]

[Done] You are given an aqueous solution of NaCl. The simplest method for the separation of NaCl from the solution is: A. evaporation of the solution to dryness B. centrifuging the solution C. osmosis of the solution D. electrolysis of the solution E. filtration of the solution

[Done] Why can't we change the subscripts in balancing chemical equations?

[Done] What type of reaction produces a metal from its metal oxide?

[Done] How do clownfish catch their food?

[Done] How many "dots" would be around the central atom in the Lewis structure of S (sulfur)? A) 5 B) 6 C) 7 D) 4

[Done] The molar mass of an element is equal to: A. the mass of an atom of the element in grams. B. the atomic mass of the element in grams. C. the number of atoms in a mole of the element. D. the number of atoms in a gram of the element. E. the number of electrons in an atom in grams.

[Done] What holds calcium chloride together? A. Hydrogen bonding B. Metallic bonding C. Ionic bonding D. Dipole forces E. Van der Waals forces (London dispersion forces)

[Done] Which substance does not obey the Lewis octet rule? (a) N₂ (b) NO (c) CF₄ (d) Ar