According to the following electron structure, how many valence electrons does carbon have? c = 1s2 2s2 2p2 a. 2 b. 4 c. 6 d. 8

What three things determine the shape and size of a puddle when water is poured out onto a surface

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?

Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.