Know the difference between an ion and a molecule

An 80.0g sample of an unknown metal is at an initial temperature of 55.5oC. Afer 540 J of energy is absorbed by the metal, the temperature of the metal increasese to 81.75oC.

Calcium hydride reacts with water to form hydrogen gas and calcium hydroxide. How many grams of calcium hydride are needed to generate 53.5 liters of hydrogen gas if the pressure is 814 torr at 21*C.

3. A gas has a volume of 225 L at 175 K and 150 kPa. What will be its volume at a temperature of 112 K and pressure remains constant? 4 . A gas is heated to 180 K at a constant pressure of 1 atm. If the container expands to hold a volume of 44.

How many atoms of carbon are combined to with 2.81 moles of hydrogen atoms in a sample of the compound ethane, C2H6?

What would be the scenario of negative acceleration

Summarize the acid-base behavior of the main-group metal and nonmetal oxides in water. How does oxide acidity in water change down a group and across a period?

What is an atom?

Sodium will react with oxygen to form sodium oxide. use the formula below to determine how many grams of sodium oxide will be formed if 46 grams of sodium are used in the reaction.

How many atoms in 2.8 mol of neon?

Which best explains why blood and the cytoplasm of cells are mainly composed of liquid water? a. Water is a common substance and is readily available. b. Water is an important transport and reaction medium. c.