An aqueous solution of potassium sulfide has a concentration of 0.175 molal. The percent by mass of potassium sulfide in the solution is %.

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.