Counting ten bikes on a bike rack is an example of a qualitative observation.

Which chemical process is an endothermic reaction? A. the rusting of elemental iron B. the combustion of methane gas C. the breaking of bonds in an oxygen molecule D. the formation of water from hydrogen and oxygen

Can car oil degrade carbon fiber?

Calculate the wavelength of light emitted when an electron in a hydrogen atom makes each transition [ (a) or (b) and (c) or (d) ] and indicate the region of the electromagnetic spectrum (infrared, visible, ultraviolet, etc.) where the light is found.

Elements that have atoms with full outer shells of electrons

Which determines the rate at which a solid solute dissolves in a liquid solvent? A) The frequency of the collisions between the solute particles. B) The frequency and energy of the collisions between the solute and solvent particles.

The molecules of a substance are moving rapidly in a container. The molecules do not interact with each other. If the container is opened, the molecules will escape from the container.

Why is fluorine a gas?

What is the empirical formula for a compound if a sample contains 3.72g of p and 21.28g of cl?-pcl5-pcl3-p2cl10-p2cl5

Use the equation 2HgO--> 2Hg+O2 to find how many moles of mercury are produced if 27 g of oxygen are produced. 2.1 1.3 2.6 2.4

How much mass does an electron, proton, and neutron have?