How many atoms are in a sample of 72.8 grams calcium?

A torpedo is launched under water, targeting a naval vessel about 5,000 m away. How can the vessel detect the torpedo before it reaches the vessel?

Ethyl alcohol has been added to 200 mL of water in a container that has a mass of 150 g when empty. The resulting container and liquid mixture has a mass of 512 g. What volume of alcohol was added to the water?

What is coke in chemistry?

Mg + I2 arrow MgI2 which is the oxidizing agent, and which is the reducing agent

Which type of measurement is used least often by scientists?

Which oxygen pachages materials and distributed them throughout the cell

How many atoms in 3 mol zn

Isotopes: are atoms of different elements which have the same mass are atoms of the same element with equal numbers of neutrons are atoms of the same element with different numbers of neutrons are atoms of the same element with equal numbers of

What would happen to the volume of a sample of gas if the temperature was decreased at the same time the pressure was increased?

How do the compounds that cause acid rain spread from their source?