The smallest unit of an element is a blank

Propane burns according to the following equation: C3H8 (g) + O2 (g) → CO2 (g) + H2O (g) If 465 mL of oxygen at STP is used in the reaction, what volume of CO2, measured at 37.0oC and 98.59 kPa.

Which condition will release more energy when an electron changes levels? From n = 4 to n = 3 from n = 3 to n = 2 from n = 2 to n = 1

Acetic acid (CH3COOH) has a heat of vaporization of 23.4 kJ/mol. What heat is required to vaporize 250 g of acetic acid?

Which of these are methods of separating a solid from a liquid? A) Decanting, filtering and evaporating B) Decanting and dissolving C) Decanting, filtering and dissolving

What is the density of a 25.8 g piece of broken glass that has a volume of 10.3 cm cubed

Which of the following types of electromagnetic waves has a frequency greater than ultraviolet waves? A) X rays B) infrared waves C) microwaves D) visible light

For each metal complex give the coordination number for the metal species. m (nh34cl2

Particles in a liquid move around just as freely as particles in a solid. True or False

How did aristotles idea of matter differ from that of scientists

How does ease of oxidation correlate with activity? Do highly active metals tend to donate electrons or accept electrons from other metals?