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Semenov [28]
2 years ago
13

Ice cracking a Chemical Change b Physical Change

Chemistry
2 answers:
IceJOKER [234]2 years ago
6 0
A Physical Change is what the change of ice is
AleksandrR [38]2 years ago
4 0

Answer:

Physical change

Explanation:

As no new substance is formed

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At one time in the Earth’s history, many people thought the world was flat. Which best explains why the model of the Earth is no
GenaCL600 [577]

Answer:

<u>Models are limited by science - the more that was discovered, the better the model could be made.</u>

Explanation:

Models in science are meant to represent things in science. Since science controls the reliability of a model, when science changes, so does the model. Otherwise the model would be pseudoscientific.

5 0
3 years ago
What happens when the temperature or pressure of a reaction system at equilibrium is altered? The equilibrium state is unable to
alina1380 [7]

Answer: The system will try and offset the change.

Explanation: Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.

This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in a direction to minimize the effect.

Thus if temperature is increased, the reaction will shift in a direction where temperature is decreasing and vice versa. Similarly if pressure is increased, the reaction will shift in a direction where pressure is decreasing and vice versa.

3 0
3 years ago
Decribe an example of how external temperature may affect human body functions
marusya05 [52]
If your body temperature falls to 95°F (35°C) or lower, you have “hypothermia.” This condition can potentially lead to cardiac arrest, brain damage, or even death. If your body temperature rises as high as 107.6°F (42 °C), you can suffer brain damage or even death.
4 0
3 years ago
How many moles of lithium hydroxide are required to react with 19.2 mol CO2, the average amount exhaled by a person each day?
sladkih [1.3K]

Answer:

38.4 mol LiOH

Explanation:

Step 1: Write the balanced neutralization equation

2 LiOH + CO₂ ⇒ Li₂CO₃ + H₂O

Step 2: Establish the appropriate molar ratio

According to the balanced equation, the molar ratio of LiOH to CO₂ is 2:1.

Step 3: Calculate how many moles of lithium hydroxide are required to react with 19.2 mol CO₂

19.2 mol CO₂ × 2 mol LiOH / 1 mol CO₂ = 38.4 mol LiOH

3 0
3 years ago
A 160g radioactive sample is left undisturbed for 12.5 hours. At the end of that period, only 5.0g remain. What is the half-life
11Alexandr11 [23.1K]

it would be 26 because once you divide 160g by 5.0g and add 12.5 you would get 26

hope this helps

3 0
2 years ago
Read 2 more answers
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