True or false If a material has a hardness of 8, it cannot be scratched by a material with a hardness of 7.

Which term is dependent on temperature? A. [A] B. [B] C. R D. x + y E. None of the Above Which term is dependent on pressure? A. [A] B. k C. R D. x + y E. None of the Above

Find the total mass of three diamonds that have masses of 14.2 grams, 8.73 grams, and 0.912 gram. A. 24 g B. 23.84 g C. 23.8 g D. 23.842 g

You have a solution containing 135.2 g of dissolved kbr in 2.3 l of water. what volume of this solution, in ml, would you use to make 1.5 l of a 0.10m kbr solution

Select the phrase that best describes scientific findings communicated through popular media. A) generally free of technical jargon B) peer reviewed C) commonly used by most scientists D) extremly reliable

A glass flask whose volume is 1000 cm3 at a temperature of 0.800 C is completely filled with mercury at the same temperature. When the flask and mercury are warmed together to a temperature of 52.0 C, a volume of 8.

A certain reaction has an activation energy of 51.64 kj/mol. At what temperature Kelvin will the reaction be 5.50 times faster than it did at 343K?

What allows electrons to flow between electrodes in an electrochemical cell? a - conducting wire b - salt bridge c - electrolyte solutions d - battery

How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen? 1 mol of oxygen has fewer molecules. 1 mol of oxygen has more molecules. Each sample has the same number of molecules.

What types of elements tend to combine to form molecular compounds?

Removing salt from water would decrease its what