Please help???? i dont know this
2 answers:
Answer:
The after-rain smell is produced by an interaction between rain and the oils released by plants. Due to chemical reaction between the rain water and oils secreted out by the plants
A homemade volcano can be created by combining baking soda and vinegar. When it erupts, carbon dioxide gas is released. When vinegar reacts with baking soda carbon-dioxide gas is released.
The Statue of Liberty has turned green over time due to the reaction of copper with ,oxygen,carbon dioxide and water.
Explanation:
Chemical change is defined as those change in which arrangement of atoms present in the substance changes and leads to formation of new substance.
The after-rain smell is produced by an interaction between rain and the oils released by plants. Due to chemical reaction between the rain water and oils secreted out by the plants
A homemade volcano can be created by combining baking soda and vinegar. When it erupts, carbon dioxide gas is released. When vinegar reacts with baking soda carbon-dioxide gas is released.
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The Statue of Liberty has turned green over time due to the reaction of copper with ,oxygen,carbon dioxide and water.
→
Physical change is defined as those changes which leads to change in shape, size or state of the substance changes. No new substance is formed.
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Answer: kJ
Explanation:
The thermochemical equation for decomposition of ammonium nitrate is:
Given mass= 50.0 kg = (1kg=1000g)
According to stoichiometry:
1 mole of gives = 82.1 kJ of heat
Thus of
give =
kJ of heat
Thus kJ of heat is evolved from the decomposition of 50.0 kg of ammonium nitrate.