Which indicator would best distinguish between a solution with pH of 7.4 and a solution of 9.2?

1) phenolphthalein

2) thymol blue

3) bromthymol blue

4) litmus

When 3.5 L of propane gas is completely combusted to form water vapor and carbon dioxide at 350°C and 0.950 atm, what mass of water vapor results?

Sodium atom has lower electron affinity than chlorine atom why?

The table below gives information about the nucleus of each 4 atoms Atom Number of protons Number of neutrons A 6 6 D 6 7 G 7 7 E 7 8 How many different elements are represented by the nuclei in the table? A 1 B 2 C 3 D 4

Caco3 is an example of which type of material?

Compare and contrast chemical change and physical change.

What water activities might be easier to do in Lake Assal's salty water? What activities could be more difficult?

The suffix "-megaly in the term gastromegaly means:

The harder you strike a drum, the greater the sound's A) medium B) volume C) frequency D) pitch

The equation X + Y 2Z has the rate law equation shown below. Which of the following statements best describes the relationship of X on the rate of the reaction? rate = k[X]2[Y] Changing X has no effect on the reaction rate.

What moves in or out of a substance during a change of state?