Marine food chains at risk of collapse, extensive study of world's oceans finds. ... The acidification of the ocean, where the pH of water drops as it absorbs carbon dioxide, will make it hard for creatures such as coral, oysters and mussels to form the shells and structures that sustain them.
Answer:
Extensive properties, such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present. Physical properties can be measured without changing a substance's chemical identity.
<h2>Al (s) + O₂ (g)----> Al₂O₃(s)</h2>
Explanation:
Chemical reaction
When two or more substances react and form some new substance it is called as chemical reaction .
For example :
Al (s) + O₂ (g)----> Al₂O₃(s)
Chemical equation
It is the representation of chemical reaction in terms of symbols ,molecular formulas ,moles , states etc .
As we know all chemical reaction obeys law of chemical combination therefore chemical reaction need to be balanced .
Law of conservation of mass
Mass can neither be created nor be destroyed in a chemical reaction , it is always conserved .That is why reactions need to be balanced .
Let us balance
Al (s) + O₂ (g)----> Al₂O₃(s)
After balancing , it becomes :
2Al (s) + 3/2O₂ (g)----> Al₂O₃(s)
STP in Chemistry stands for <span>Standard Temperature and Pressure. STP most commonly use when dealing with gases, an example would be Gas Density
</span><span> The standard temperature is 273 K (0° Celsius or 32° Fahrenheit) and the standard pressure is 1 atm pressure</span>
