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Jobisdone [24]
3 years ago
13

A substance is matter that has a definite composition. TRUE or FALSE?

Chemistry
2 answers:
Lina20 [59]3 years ago
6 0

Answer:

FALSE!!

Explanation: some substances like gas or liquid do not have a definite composition/shape

Greeley [361]3 years ago
3 0

Answer: false

Explanation:

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The following molecular equation represents the reaction that occurs when aqueous solutions of silver nitrate and aluminum chlor
irga5000 [103]

Answer:

3Ag^(+) + 3Cl ^(-) --> 3AgCl (s)

Explanation:

Full ionic equation:

3Ag^(+) + 3NO3^(-) + Al^(+3) + 3Cl^(-)-->

3AgCl (s) + Al^(3+) + 3NO3^(-)

Spectator ions 3NO3^(-) & Al^(+3) can be left out in the net ionic equation.

3 0
3 years ago
Define the following:
Advocard [28]

Answer:

A. Passive Transport is migration of a molecule from one side of the cell membrane to the other, from an area of high electrochemical potential to a region of lower electrochemical potential.

B. Diffusion is an individual molecule of a material moving from a high-concentration location to a low-concentration area over a semipermeable barrier

C. Osmosis is the movement of molecules of water through a cell's partly permeable membrane from a liquid with a large concentration of water molecules to a solution with a lower concentration of water molecules.

D. Facilitated Diffusion are molecules that diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers.

E. Active transport is the transport of molecules across a cell membrane against a concentration gradient from a low-concentration region to a high-concentration region.

F. Selectively permeable is when some chemicals or ions pass across the membrane, while others are blocked.

G. Cellular respiration are organisms mix oxygen with food molecules, directing the chemical energy in these substances into life-sustaining processes while eliminating carbon dioxide and water as waste material.

Explanation:

8 0
2 years ago
Which of these best describe a flight that is approaching the speed of sound
frozen [14]

Answer:

more drag is created because the air molecules are not moving out of the way of the airplane      

Explanation:

7 0
2 years ago
Can artificial selection aid in the evolution of an organism?
stepan [7]
As stated on google it says “ Farmers and breeders allowed only the plants and animals with desirable characteristics to reproduce, causing the evolution of farm stock. This process is called artificial selection because people (instead of nature) select which organisms get to reproduce. ... This is evolution through artificial selection.”
6 0
3 years ago
HELP PLZ
Vinvika [58]

Answer:

1). 19.9

2). 0

8 0
3 years ago
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