36) Read the water level with the correct number of significant figures 36) A) 5

Question

36) Read the water level with the correct number of significant figures 36) A) 5.32 mL B) 5.3 mL C) 5.3200 mL D) 5.320 mL E) 5 mL 37) Two or more substances in variable proportions, where the composition is constant throughout are 37) A) a compound. B) a heterogeneous mixture C) an element. D) a crystalline solid E) a homogeneous mixture. 38) Determine the number of protons, neutrons, and electrons in the following: 40 18 A) p+ 18 B)p+ = 18 C)p+-18 D)p+ = 22 E) p+ 40 n 18 n°-22 n°-22 n°-18 n°=22 e 22 e-=40 e-=18 e-=18 18 39) lons differ in the number of A) neutrons and protons B) neutrons C) protons D) electrons and protons. E) electrons

Explanation / Answer

37) Two or more substances in variable proportions, where the composition is constant throughout are a homogeneous mixture.

38) The number of protons = 18

Number of electrons = 18

Number of neutrons = 40 -18 = 22

39) Ions differ in the number of electrons.

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