Calculate the Mass of water needed to make 20% solution from 50g of glucose?

Which combination of properties allow you to decide if two objects are made up of different metals? a color and texture. b. texture and volume c mass and color d volume and mass

Which factors must be equal when a reversible chemical process reaches equilibrium?

How many sulfide ions are present in 23.5g of Sb2S3

Positive and negative charges are attracted to one another. Which of the following are attracted to a negative charge: an electron, a proton, a neutron, a nucelus, an atom? Explain your thinking.

Why is this reaction considered to be exothermic? a Because energy difference A is greater than energy difference C. b Because energy difference A and energy difference C are about equal.

How marly electrons are in an atom of elemental sodium?

Petroleum and coal can be mined from the continental shelf. t/f

A solid substance turns into a liquid. Which best describes this change?

List two things you know about nonrenewable energy

Does a mole of hydrogen have the same mass as a mole of oxygen? explain your answer.