23. On the periodic table, there are two numbers in the block for the element potassium, K: 19 and 39.098. What are the names of the numbers and what do they measure?

Which of the following would not be considered a physical property? Group of answer choices : (A) temperature at which a material catches on fire (B) color (C) conductivity (D) hardness

Describe the process that ice on mount everest goes through when being heated from 10 degree fahrenheit to 305 degree kelvin. then explain how the energy requiresment change at different steps of the heating curve.

Which of the following is the most polarizable: F2, H2, C2H6, or all of them?

What did democritus and aristole think about the composition of matter

Using retosynthetic analysis, complete the synthesis of 2-pentanone from ethanol, proceeding through a keto ester as the synthetic intermediate. g

Combustion analysis of toluene, a common organic solvent, gives 8.20 mg of co2 and 1.92 mg of h2o. if the compound contains only carbon and hydrogen, what is its empirical formula?

Why does the moon have phases? What are the four main phases of the moon? How long does it take to change from one to another?

How many atoms are in 1/2 mole of calcium

Which of the following units is best when measuring the mass of an object?

When balancing an equation, should you adjust the subscripts or the coefficients?