How many atoms are in a molecule

The prefix 'mili' - means a thousandth. So a mili-liter is a thousandth of a liter. 1 mililiter = 1/1000 liter, How many liters is 1,939 mililiters? Round your answer to the nearest tenth of a liter.

A sample of hydrated calcium sulfate has a mass of 2.643 g. After dehydration, the sample has a mass of 2.090 g. What is the percent by mass of water in the hydrate?

Write a balanced equation of reaction. Solid potassium chlorate is heated to form solid potassium chloride and oxygen gas. Express your answer as a chemical equation. Identify all of the phases in your answer.

What can you conclude from the hypothesis "If the temperature of the liquid is increased, then more sugar will dissolve because warm solutions hold more solute that cold solutions"?

What is NOT true for a catalyst? 1. A catalyst increases the rate of a chemical reaction by decreasing activation energy. 2. A catalyst is not consumed in chemical reactions. 3.

A 1.3 g sample of gold (specific heat capacity = 0.130 J/g °C) is heated using 86.9 J of energy. If the original temperature of the gold is 25.0°C, what is its final temperature?

In what applications might coal replace petroleum based fuel

How many molecules are in 7.5 mol of h2o

An electron moved from a lower energy level to a higher energy level. What most likely happened during the transition? A random amount of light was released. A fixed amount of energy was absorbed. A fixed amount of energy was released.

Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of hydrogen gas are formed when 57.1 grams of sodium are added to water?