Which phase change represents a decrease in entropy? (1) solid to liquid (3) liquid to gas (2) gas to liquid (4) solid to gas

What is the difference between the orbital periods of Mercury and Earth? Select one: a. 0.61 years b. 0.76 years c. 1.24 years d. 1.39 years

How many grams are in 1.11 moles of manganese sulfate, Mn3 (SO4) 7?

How did the concentration of iodide ions change in these two trials, how did the rate change accordingly?

What is the chemical makeup of water

Deserts are increasing world wide. This is known as A. disintegration B. desertification C. decomposition D. disaggregation

You sealed an Erlenmeyer flask that was determined to have a volume of 272.2 mL with a stopper. The density of air at 25°C is 0.001185 g/mL. Air has an effective molar mass of 28.96 g/mol. What amount of air was sealed in the flask?

Let's say we start with 2.2lbs of uranium. If the half-line of U-235 is 703.8 million years, how much uranium will we have after 2,815 million years

When sulfuric acid (h2so4) loses its hydrogen in exchange for calcium it becomes a (ch 8) : ?

A laboratory requires 2.0 L of a 1.5 M solution of hydrochloric acid (HCl), but the only available HCl is a 12.0 M stock solution. How could you prepare the solution needed for the lab experiment? show all work to find your answer

What is the primary function of neurons?