What must models and theories do in order to remain valid? Provide 2 facts.

When Xavier places his hands near a light bulb, he notices that certain areas around the light bulb are warmer than others. Which best explains this?

Fairly warm but windy outside what the wind chill factor to explain why it may be a good idea to wear a jacket.

What property of matter best describes the way a typical alcohol thermometer works?

Identify each of the following household substances as a strong electrolyte, weak electrolyte, or non-electrolyte: salt solution (in water), sugar solution (in water), bleach, vinegar, and baking soda solution (in water).

Which is the most accurate description of the liquid state of matter? A. It has a fixed shape. B. Its volume is not fixed. C. It cannot take the shape of its container. D. Its particles can move past and bump into each other.

How many moles of lithium are in 83 grams of lithium?

Ocean constitutes most of ___ of water a) Evaporation b) Precipitation c) Condensation d) Transpiration e) Sublimation Don't choose a random letter.

In the reaction, Zn + HCl-> ZnCl2 + H2, 25 grams Zn are reacted with 17.5 grams HCl. How many grams of H2 will be produced? A. 0.382 g of H2 B. 0.479 g of H2 C. 0.7865 g of H2 D. 0.484 g of H2

Is nail varnish soluble?

What is the periodic trend for atomic size from top and bottom in a group? From left to right in a period?