Answer:
Chemistry is the study of matter , its properties,how and why substance combine or separate to form other substance.
It's uses are
1) It is used in health care and beauty
2) Industries and transportation
3) Agriculture, science and technology
4) Cooking , cleaning, medicines etc
Answer:
B. two rounds of cell division
Answer:
4.998 × 10²⁴ amu
Explanation:
Given data:
Mass of substance = 8.3 g
Atomic mass unit = ?
Solution:
The mass of one mole of substance is equal the gram per mole of that substance.
atomic mass unit = g/mol
For 8.3 g:
8.3 × 6.022×10²³
4.998 × 10²⁴ amu
The number 6.022 × 10²³ is called Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
Answer: precipitate
Explanation: Chemical change is a change in which the chemical composition of the atoms changes. The following changes are seen when chemical reaction takes place:
1) Release or absorption of heat
2) Formation of solid or a precipitate
3) Change in color
4) Production of gas
Answer:
idfk
Explanation:
cause God made it that way
