La temperatura es un cambio físico
because it a essential for good heat transfer
CH3-CH=CH-CH2-CH3 <--------CH3-CH2-CHCl-CH2_CH3
3-Cl-pentane , 3-Hal-pentane
Answer:
Bài 1. Có 30g dung dịch NaCl 20%. Tính nồng độ % dung dịch thu được khi
a. Pha thêm 20g H2O
b. Cô đặc dung dịch để chỉ còn 25g.
Answer:
A compound is a pure substance that is composed of elements chemically bonded in definite proportions. A compound can be broken down into simpler substances only by chemical reactions, such as electrolysis. A solution is a homogeneous mixture, meaning that it is the same throughout.
Explanation:
.
