5 Um vidro contém 300 cm3 de mercúrio de densidade 13 g/cm3. Qual é massa de mercúrio contido no vidro?

Which of these substances are molecules? 1. H2O 2. NaCl 3. N2 4. O2 Question 12 options: 3 and 4 All of them 1 and 2 None of them

A student measures the mass of a metal bar as 57.21 g. the student fills a graduated cylinder with water and determines the volume of water to be 53.70 mL. The student places the metal bar into the graduated cylinder and records the new volume as 58.

How many molecules are in 2.00 mol of water?

What type of energy is used to power up the lite bulb? When the light bulb turns on, energy is being converted into what forms? How do you know? What happens when you increase the voltage of the battery?

Together oxygen and nitrogen comprise what percentage of the atmosphere

Categorize the following materials: bronze alloy, mouse growing an ear on its back, porcelain dentures

A decomposition occurs when you open a can or bottle of soda. Carbonic acid. H. CO, is in carbonated beverages. It decomposes into carbon dioxide and water.

Can someone reword this? A magnetic substance has magnetic fields. These fields start at the North Pole wrap around the magnet, and terminate at the south pole of the magnet. All magnetic substances have north and south poles

Which of these is produced when fossil fuels are burned? A) oxygen Eliminate B) nitrogen C) hydrogen D) carbon dioxide

Predict the sign of ΔSsys for each of the following processes. Which are positive? (a) Gasoline vapors mix with air in a car engine. (b) Hot air expands. (c) Humidity condenses in cold air.