A sample of iron has a mass of 46.8 grams and a volume of 6 cm3. what is the density of iron?

Modern atomic theory states that the Atom on diffuse cloud surrounding a small dense nucleus identifying which particle is in the nucleus

Two samples of carbon come into contact. heat will transfer from sample a to sample b if the average kinetic energy of sample a's atoms is the average kinetic energy of sample b's atoms.

How many grams of oxygen are needed to react with 350.0 g of iron to produce 500 g of Fe2O3

Who discovered a pattern to the elements in 1869?

When the combustion engine was invented it had many positive effects on society years later it has been discovered that the burning of oil and col has one major negative effect on the environment What is that negative effect?

How does th composition of a mixture of hydrogen and oxygen differ from the composition of a compound containing hydrogen and oxygen?

You are asked to prepare 500 mL 0.250 M acetate buffer at pH 5.00 using only pure acetic acid (MW=60.05 g/mol, pKa=4.76), 3.00 M NaOH, and water. Answer the questions regarding the preparation of the buffer. 1.

Which direction do electrons move in when metals react with non-metals?

Hen an electric current passes through liquid water, hydrogen gas passes accumulates at one electrode and oxygen accumulates at the other. Which of the following is true? A) A physical change has occurred, with energy is being absorbed.

Explain what happens to water when heat energy is absorbed a. Ice melts b. Liquid water freezes c. Water vapor condenses