The only definite evidence of a chemical reaction is

A) The production of new substances

B) Changes in phase

C) Formation of a gas

D) A color change

How many moles of solid chromium can be deposited from a crcl3 solution when a steel wrench is electroplated with a current of 3.0 amps for 965 seconds? do this without a calculator?

For the decomposition of A to B and C, A (s) ⇌B (g) + C (g) how will the reaction respond to each of the following changes at equilibrium?

why are these alcohol important

The total mass of the protons in an atom of gold-198 is approximately (1) 79 atomic mass units (2) 119 atomic mass units (3) 198 atomic mass units (4) 277 atomic mass units

Alkanes with a branch coming off the straight chain are identified as substituted alkanes. what would be the name of a straight chain made of 8 carbons with - ch3 groups on the second and fifth carbons?

What water activities might be easier to do in Lake Assal's salty water? What activities could be more difficult?

The suffix "-megaly in the term gastromegaly means:

The harder you strike a drum, the greater the sound's A) medium B) volume C) frequency D) pitch

The equation X + Y 2Z has the rate law equation shown below. Which of the following statements best describes the relationship of X on the rate of the reaction? rate = k[X]2[Y] Changing X has no effect on the reaction rate.

What moves in or out of a substance during a change of state?