Question

1. Which ONE of the following lists gives the correct symbols for the elements phosphorus, potassium, silver, chlorine, and sulfur in that order? A) K, Ag, Po, Cl, S B) P, Po, Ag, CI, S C) Ph, K, Ag, S, Cl D) E) P, K, Ag, Cl, S Ph, Po, Ag, CI,S 2. Which of the following is NOT a correct name-symbol combination? A) beryllium, Be B) boron, B C) cobalt, Co D) magnesium, Mn E) copper, Cu 3. If matter is uniform throughout, cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is called a (an) A) heterogeneous mixture B) element C) homogeneous mixture D) compound E) mixture of elements 4. A temperature of 400 K is the same as A) 261 B) 286 C) 88 D) 103 E) 127 5. The formula of sulfuric acid is 6. The formula of hydrochloric acid is A) HCI B) HCIO C) HCIO, D) HCIO 7 The distance between the two hydrogen atoms in a molecule of water is 0.000000000172 m. Express this distance in scientific notation. A) 1.72 x10-9 m B) 1.72 x 10-10 m C) 0.172 x 10-10 m D) 17.2 x 109 m E) 1.72 x 1010m The correct prefix for the multiplier 1,000,000 is: A) mega. C) micro D) nano. E) none of the above 9 How would you classify raisin bran? A) pure substance-compound