Answer:
your skin opens up
Explanation:
the pores i your skin opens up and let the water (sweat) out to help cool down your body.
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Homework science chemistry
B. Carbon
C. Methane
D. Water
Carbon is the substance can not be decomposed by a chemical change. Therefore, option B is correct.
A chemical change is the transformation of one material into another, the formation of new materials with different properties, and the formation of one or more new substances. It occurs when one substance reacts with another to form a new substance.
Carbon and water Although carbon dioxide and carbonic acid are simpler compounds, they are still compounds. As a result, they can decompose and leave us with the basic elements' hydrogen, oxygen, and carbon. Compounds degrade due to chemical changes.
Elements are pure substances that cannot be broken down using conventional chemical methods such as heating, electrolysis, or reaction. Elements include gold, carbon, silver, and oxygen.
Thus, option B is correct.
To learn more about the chemical change, follow the link;
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Ll2CO3 →
75g
MgCO3 +
135g
LiCl
34g
solve this
Answer:
MgCl₂ = 94 g
Explanation:
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
Explanation:
This law was given by french chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
For example:
Chemical equation:
MgCl₂ + Li₂CO₃ → MgCO₃ + 2LiCl
? + 75 g = 135 g + 34 g
The mass of reactant and product must be equal. That's why,
135+ 34 = 169 on product side
94 + 75 = 169 on reactant side
MgCl₂ + Li₂CO₃ → MgCO₃ + 2LiCl
94 + 75 g = 135 g + 34 g
169 g = 169 g