Oxygen,hydrogen, and carbon
Organic chemistry is the study of molecules containing carbon, so A
Answer:
A pH of 7 is neutral.A pH of less than 7 is acidic.
Explanation:
Answer:
A: The first one because it is going upward and that means getting warmer.
B: The second one is the cooling curve because it is going downward and that means cooler.
Explanation:
I hope this helps.
Answer: Pure substances cannot be separated by physical means.
Explanation:
A pure substance is a substance which contains definite composition of only one type of component. Hence, it cannot be separated by physical means.
On the other hand, a mixture is a substance which contains two or more than two types of components and they can be separated by physical means as well.
Thus, option (a) is correct one that is pure substances cannot be separated by physical means.