Which of the following is an example of physical evidence? A. Hair B. Fibers C. Soil D. All of the above

How can the temperature of a substance remain the same even if th substance is absorbing thermal energy?

Common table salt is sodium chloride. when table salt is dissolved in water, the solution conducts electricity because

In the balancing chemical equations simulation on phet, were you able to use noninteger numbers (like? or 0.43) for the coefficients in a balanced equation? Why or why not?

How many moles of NO must react to form 4.67 moles of NO2

What do decomposer and consumers have alike?

Identify the spectator ions in the following complete ionic equation. 2k (aq) s2 - (aq) pb2 (aq) 2no-3 (aq) →pbs (s) 2k (aq) 2no-3 (aq) express your answers as ions separated by a comma.

4. A bird left its post and flew in a triangular path. It flew 21 yards south, 72 yards east and 75 yards diagonally to end back at the post. Is it a right triangle?

Condension occurs in the inside of your windows in Winters, why?

How can you use Hess's law to determine a reaction's enthalpy?

7. How much energy in KJ is released when 15.0 g of steam at 100.0 degrees Celsius is condensed and then frozen to ice at 0.0 degrees Celsius?