The list below includes some of the properties of ammonia. identify the physical properties in the list. check all of the boxes that apply.
a) gas at room temperature
b) strong, unpleasant odor
c) reacts with hydrochloric acid
d) dissolves easily in water
e) burns in oxygen

The answer to your question is: A, B and D

Explanation:

Physical properties:  are properties of matter that can be observed of measure without matther changes its nature.

Chemical properties: are properties of matter in which matter changes or modify its structure.

A) gas at room temperature  This is a physical property, matter do not change.

B) strong, unpleasant odor  This is a physical property, because oder is a natural characteristic of matter.

C) reacts with hydrochloric acid  After reaction the product will be different from the reactant  so this is a chemical reaction.

D) dissolves easily in water  this is a physical property, after this process matter will be the same.

E) burns in oxygen This process is called combustion; in this process matter changes its structure, this is a chemical property.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.