Elena weighed out 50 grams of salt. She dissolved the salt in 285 grams of water. After she added salt the water had 335 grams of weight. How did the addition of the salt affect the final mass and volume of the mixture?

The pressure in a car tire is 298 kilopascals at 300 Kelvin. After a long drive, the pressure becomes 325 kilopascals. Which law will you use to calculate the new temperature in the tire assuming that the volume is constant?

Consider the phase change H2O (l) → H2O (g). This equation describes the phase change from liquid water to steam. Think about the heat flow that is necessary for this change to take place. What do you predict about the process?

How does an atom become a positively charged ion? by gaining one or more electrons by gaining one or more neutrons by losing one or more electrons by losing one or more neutrons

1999 honda accord 2.3l dx why noise clunking noise

18. What element has 81 protons in the nuclei of its atoms?

What term is used to describe a testable modle

When the equation for the combustion of ethane, C2H6, is correctly balanced, the coefficient on oxygen is:

Sahil watched a demonstration in which a scientist combined two substances in a sealed container and analyzed the results. the ending substances did not look the same as the starting substances.

How many molecules of H2S are required to form 79.0 g of sulfur

How many grams of potassium iodide, KI, are required to make 2.0 L of a 0.1M solution