1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
SOVA2 [1]
2 years ago
14

According to the law of conservation of matter, which statement about chemical reactions is true?

Chemistry
1 answer:
Yanka [14]2 years ago
3 0

Atoms cannot be created or destroyed by chemical reactions. They just have a some bonds rearranged is all.


You might be interested in
Plants and animals need to protect themselves to survive. Select the statement that best describes the adaptions of animals and
saul85 [17]
I need points lol sorry for wasting ur time we
3 0
2 years ago
How many total atoms are in C6H6
Kruka [31]
The Total Amount Of Atoms In C6H6 Is 12 Atoms
7 0
3 years ago
What is the percent composition by mass of oxygen in ca(no3)2 (gram-formula mass = 164 g/mol)?a.9.8%b.29%c.48%d.59%?
Mila [183]
Percent composition by mass of oxygen =
((16.0*6)/(40.1+2*(14.0+16.0*3)))*100%
= 58.5%
therefore, the answer is D
8 0
3 years ago
Read 2 more answers
How do take off my question when I don't have a question?
kotegsom [21]
Why would you ask a question if you didnt have a question?

Just get someone to report it, and itll be deleted
7 0
2 years ago
Read 2 more answers
One kilogram of water at 100 0C is cooled reversibly to 15 0C. Compute the change in entropy. Specific heat of water is 4190 J/K
mina [271]

Answer:

The change in entropy is -1083.112 joules per kilogram-Kelvin.

Explanation:

If the water is cooled reversibly with no phase changes, then there is no entropy generation during the entire process. By the Second Law of Thermodynamics, we represent the change of entropy (s_{2} - s_{1}), in joules per gram-Kelvin, by the following model:

s_{2} - s_{1} = \int\limits^{T_{2}}_{T_{1}} {\frac{dQ}{T} }

s_{2} - s_{1} = m\cdot c_{w} \cdot \int\limits^{T_{2}}_{T_{1}} {\frac{dT}{T} }

s_{2} - s_{1} = m\cdot c_{w} \cdot \ln \frac{T_{2}}{T_{1}} (1)

Where:

m - Mass, in kilograms.

c_{w} - Specific heat of water, in joules per kilogram-Kelvin.

T_{1}, T_{2} - Initial and final temperatures of water, in Kelvin.

If we know that m = 1\,kg, c_{w} = 4190\,\frac{J}{kg\cdot K}, T_{1} = 373.15\,K and T_{2} = 288.15\,K, then the change in entropy for the entire process is:

s_{2} - s_{1} = (1\,kg) \cdot \left(4190\,\frac{J}{kg\cdot K} \right)\cdot \ln \frac{288.15\,K}{373.15\,K}

s_{2} - s_{1} = -1083.112\,\frac{J}{kg\cdot K}

The change in entropy is -1083.112 joules per kilogram-Kelvin.

7 0
2 years ago
Other questions:
  • Change of a liquid to a solid is called what
    13·2 answers
  • Igneous rocks with an andesitic composition ________.
    5·1 answer
  • What is the ph of an aqueous solution with a hydrogen ion concentration of [h ] = 9.7 × 10–4 m?
    6·1 answer
  • 7. Which liquid caused the egg to shrink? *
    13·2 answers
  • How many valence electrons must two atoms share to form a single covalent bond? answers A.2 B.4 C.3 D.1
    14·1 answer
  • A flask contains 0.100 mol of liquid bromine, br2. determine the number of bromine molecules present in the flask.
    13·1 answer
  • A precipitation reaction 2. A Lewis acid-base reaction the produces a coordination complex: A Lewis acid-base reaction the produ
    15·1 answer
  • In centigrade bromine has a melting point of -7 and a boiling point of 58. Room temperature is 20. What is bromine at this tempe
    7·1 answer
  • A 0.5242-g sample of a compound known to contain only carbon, hydrogen, and oxygen was burned in oxygen to yield 0.9740 g of CO2
    11·1 answer
  • Which items below are properties of matter? [select all that apply]
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!