The answer is D)
<span>when the remains of a living thing are preserved and turned into rock
</span>
A. The pH will be less than 7 at the equivalence point. At equivalence point all of the strong acid will have reacted with the weak base and the reverse reaction will occur causing you to form H+ making the solution acidic and making the pH acidic which is lower. Hope that helps
Answer:
0.40 atm
Explanation:
To answer this problem we can use the <em>combined gas law</em>:
In this case:
- T₂ = 287 °C ⇒ 287 + 273.16 = 560.16 K
- T₁ = 7 °C ⇒ 7 + 273.16 = 280.16 K
We <u>input the data</u>:
- 560.16 K * 1 atm * 1 L = 280.16 K * P₂ * 5 L
And <u>solve for P₂</u>:
Answer:
Explanation:
a. change of colour:
A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products. The products have different molecular structures than the reactants. Different atoms and molecules radiate different colours of light. Hence, there usually is a change in colour during a chemical reaction.
Eg: copper reactions with the elements
b. Evolution of gas:
A gas evolution reaction is a chemical reaction in which one of the end products is a gas such as oxygen or carbon dioxide.
Eg: ammonium hydroxide breaks down to water and ammonia gas.
c. Change of smell :
Production of an Odor Some chemical changes produce new smells. ... The formation of gas bubbles is another indicator that a chemical change may have occured.
Eg: The chemical change that occurs when an egg is rotting produces the smell of sulfur.
d. Change of state:
A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products.
Eg: candle wax (solid) melts initially to produce molten wax (liquid)
plz mark as brainliest!!!!
Answer:
irreversible.
I hope this will help you
