Is air matter or energy

Calculate the density of a cube of iron that measures 3.50cm, 0.755 cm, 2.25cm on each side and weighs 47.0g?

Fluorine's atomic number is 9 and its atomic mass is 19. how many neutrons does fluorine have

How do scientists measure changes in the levels of global atmospheric co2? a. they have directly measured co2 in the atmosphere since 1758. b. they measure co2 levels in water trapped deep in earth's crust. c.

What is a characteristic of the polar water molecule?

Is salt and water after filtering a pure substance?

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.