What is the mass of an element with 78 protons and 78 neutrons

What are three common materials that were developed by scientists

The atomic mass of iron is 55.85, and oxygen is 16.0. What is the mass of 6.02 * 1023 molecules of Fe2O3?

What is a dark mysterious and non-nicotine mineral containing sample of a very common silicate? It's geology actually.

What is the name of the compound that has the formula PCl3? a. monophosphorus trichloride b. phosphorus trichlorate c. phosphorus trichloride d. phosphorus chlorate

1. Displacement vectors of 10 m west and 14 m west make a resultant vector that is O A 14 m west OB 24 m west OC 10 m west OD 6 m west

What are the products of the alpha decay of Iodine-131?

Which lewis electron-dot diagram represents a nitrogen atom in the ground state

What would a 1:1 liquid binary mixture of Cyclohexane and Toluene look like? How would the molecules associate with one another?

A sample of argon gas is at a pressure of 1.725x10^4 kPa and a temperature of 24°C in a rigid 20 L tank. How many moles of argon does this tank contain? (show your work)

summarize what you read on the two articles by identifying the advantages and disadvantages of using plastics