Are beads a heterogeneous mixture

Equation between na2co3 and hcl? How many phylums are there in the animal kingdom? What is the movement of the fluid called? Neutral wire is typically what color? Why should you grow bacteria in a pure culture instead of a natural environment? Why is mercury never seen overhead at midnight in earths sky? What would happen to cells in a hypothetical cell line if mitosis occurs every 10 hours but cytokinesis occurs every 20 hours? Do hinge joints allow for rotation? How much helium is in stars? What noble gas has the same electronic configuration as fluorine? If 1 kilogram equals 2.206 pounds how many pounds are in a gram? Where are red blood cells destroyed as they wear out? What comes from the female parent? Why is microorganisms cannot be rigidly classified as either 'harmful' or 'harmless'? What is a group of sepals called? What are common patterns used in a text for controlling ideas? How is clay prepared? How do the nervous and endocrine systems respond to an increase in environmental temperature to achieve homeostasis? Why is nitrogen gas in the atmosphere useless to plants? What is the largest children's charity in the world?