Which of these is an indication that a chemical reaction has occurred?

A. melting of a substance

B. boiling of a substance

C. formation of a precipitate

D. freezing of a substance

What are the four functions of the endocrine system?

How does a solar eclipse effect earths temperature

Which of the following parts of Dalton's atomic theory was incorrect? Elements cannot turn into different elements in chemical reactions. Elements can combine in different ratios in chemical reactions.

What are the five steps a flavor chemist needs to review before starting a flavor project

What volume of a 1.50 m hcl solution should you use to prepare 2.00 l of a 0.100 m hcl solution?

Why would putting argon and pottassium in order of there atomic masses be wrong

How many moles of calcium chloride (CaCl2) are needed to react completely with 6.2 moles of silver nitrate (AgNO3) ? 2AgNO3 + CaCl2 → 2AgCl + Ca (NO3) 2

A block of aluminum has the dimensions: length 5cm, width 3cm and height 1cm and weighs 40.5 g. What is its density?

Balance this equation Pb (NO3) 2+Na2 (CrO4) = Pb (CtO4) + Na (NO3)

Is yeast the same as baking powder