Which of these can be classified as a pure substance?

Describe how speed, velocity and acceleration are related?

How much water must be added to 12.0 mL of 1.65 M LiCl to dilute the solution to 0.495 M LiCl?

How to find the density of a liquid given only volume and molecular weight?

What can be concluded if an ion of an element is smaller than an atom of the same element? (1) The ion is negatively charged because it has fewer electrons than the atom. (2) The ion is negatively charged because it has more electrons than the atom.

In this diagram, medium A represents water and medium B represents air. The phenomenon in this diagram, moving from A to B, is called

What is the correct value for Avogadro's number? A. 6.022 x 10^23 B. 6.023 x 10^22 C. 6.022 x 10^33 D. 6.022 x 10^2.3 E. none of the above

Fossil fuels are considered useful to humans because they are

Which organelles are unique to plant cells? chloroplasts mitochondria vacuoles nuclei

An atom that has 13 protons and 15 neutrons is an isotope of the element? How can I count it?

Which element is nuclear fusion least likely to produce? hydrogen, which has an approximate mass of 1 chlorine, which has an approximate mass of 35 argon, which has an approximate mass of 39 silicon, which has an approximate mass of 28 I know the