When a cup of hot chocolate cools from 90 C to 80 C, which

of the following is happening to the molecules of the liquid?

How many grams of water are required to form 9.00 moles of TiO2 according to the reaction described by the following equation: TiCl4 + 2H2O → TiO2 + 4HCI. A. 36 g H2O B. 324 g H2O C. 359 g H2O D. 719 g H2O

Which is the number in front of chemical formulas that represents the ratio of each substance shown in a balanced chemical equation? a. coefficient b. covalence number c. catalyst

Does cow meat have any percentage of veggies in them?

Which of the following is not a trait of gases? a. fluidity b. low density c. capable of effusion d. tightly packed particles

For the chemical reaction C2H6 - -> C2H4 + H2 + 137kJ, the chemical energy of the a) products is greater than the chemical energy of the reactant. b) reactant and the chemical energy of the products are equal. c) reaction cannot be calculated.

Rutherford calculated that a gold atom is about 10,000 larger than its nucleus. Thinking about his experiment and its results, how did he come to this conclusion?

Which atom in the ground state requires the least amount of energy to remove its valence electron? (1) lithium atom (2) potassium atom (3) rubidium atom (4) sodium atom

Which of the following is the correct Lewis structure for ammonia (NH3) ? Note: Hydrogen and nitrogen have one and five valence electrons respectively.

Which statement about the electron-cloud model is true? A. It is the currently accepted atomic model. B. it can easily be replaced by existing models C. It specifies the location and momentum of an electron. D.

To the nearest gram, what is the mass of one spoonful of sugar?