Which of these changes produces a chemical change?
O A. A stone fizzes and forms a gas when acid is dropped on it.
B. Limestone slowly dissolves in water and forms a cave.
O C. Lava cools and changes from a thick fluid to solid rock.
OD. A large rock is crushed into gravel.

Question

10-11-2020
Biology

contestada

Which of these changes produces a chemical change?
O A. A stone fizzes and forms a gas when acid is dropped on it.
B. Limestone slowly dissolves in water and forms a cave.
O C. Lava cools and changes from a thick fluid to solid rock.
OD. A large rock is crushed into gravel.

Respuesta :

Otras preguntas

All chalk line is place around the perimeter of the football field. What is the length of this line in feet? The field is 531/3yd length and 120yd width

Which of these organizations evolved out of the Pan-Africa movement? North Atlantic Treaty Organization African Union Commonwealth of Nations United Nations

Use the list of newspaper headlines in the box below to answer the question. 1. "Bush Vows Terrorist Acts Avenged" 2. "Sniper Kills Kennedy - Johnson is Preside

The purpose of __________ programs is to reverse the effects of years of discrimination against racial minorities and women.

Each of the following takes place when there is too little money in the economy EXCEPT: A. inflation rises B. people spend less money C. unemployment increases

The admission fee at an amusement park is 1.5 dollars for children and 4 dollars for adults. On a certain day, 256 people entered the park, and the admission fe

What influenced the development of Byzantine art and architecture? A. Russian religious art was the major influence on Byzantine art. B. Egyptian and Indian art

One of the contributing factors to America's initial decision to enter into World War I was the Zimmermann Note. What were the contents of this telegram sent fr

how is it possible that over 20 million living organisms on the planet are made up of only 5 types of nucleotide bases arrange in long chains

What internal stimulus most likely drives a lioness to search for prey

ihlester ihlester · Answer 1 · 2021-01-15T11:41:34+01:00

Answer:

Explanation:

Limestone (CaCO3) dissolves in water - with difficulty - but remains, and can be recovered as CaCO3

Solidifying lava and rock crushed to gravel are physical changes.

If acid dropped on a rock causes fizzing and gives of gas, that is a chemical reaction, e.g,

CaCO3 + 2HCl —> CaCl2 + H2O + CO2

Dissolution of limestone in water does result in dissociation into ions that may be hydrated, but CaCO3 is precipitated out as solutions become more concentrated.

CaCO3 + 2H2O —> Ca++ + CO3= + OH- + H3O+

Which of these changes produces a chemical change? O A. A stone fizzes and forms a gas when acid is dropped on it. B. Limestone slowly dissolves in water and forms a cave. O C. Lava cools and changes from a thick fluid to solid rock. OD. A large rock is crushed into gravel.

Respuesta :

Otras preguntas

Which of these changes produces a chemical change?
O A. A stone fizzes and forms a gas when acid is dropped on it.
B. Limestone slowly dissolves in water and forms a cave.
O C. Lava cools and changes from a thick fluid to solid rock.
OD. A large rock is crushed into gravel.