Is a click heat pad a chemical or physical change?

Describe at least two ways that carbon can get from seashells to the atmosphere

Place the following substances in order of decreasing vapor pressure at a given temperature. PF5 BrF3 CF4 A) BrF3 > PF5 > CF4 B) BrF3 > CF4 > PF5 C) PF5 > BrF3 > CF4 D) CF4 > BrF3 > PF5 E) CF4 > PF5 > BrF3

Which of the following compounds is primarily covalent? A.) Potassium chloride, KCL B.) Methane, CH4 C.) Sodium bromide, NaBr D.) Lithium oxide. Li2O

Why do all sailors sail at different latitudes when they travel east or west

An elements atomic number is 32. How many protons would an atom of this element have?

4Al (s) + 3O2 (g) - >2Al2O3 (s) the reaction is started by mixing 10.0g of Al and 10.0g of O2. What is the limiting reaction and how much Al2O3 is produced?

F 3.84 moles of methane are consumed in this reaction, how many moles of HCN will be produced?

Two metals with equal mass and different heat capacities are subject to the same amount of heat; which undergoes the smallest change? a) The metal with the higher heat capacity. b) The metal with the lower heat capacity.

What is the first man made organic compound synthesized in laboratory?

Express (3 x 104) (4 x 1023) in scientific notation