Answer:Chemical reactions often involve changes in energy due to the breaking and formation of bonds. Reactions in which energy is released are exothermic reactions, while those that take in heat energy are endothermic. exothermicA description of a chemical reaction that releases heat energy to its surroundings.
7. 1,2,2,2
8. 4,3,1
9. 1,4,1,2
10. 3,4,1,4
Answer:
I hope you have the answer now
Explanation:
u an
Answer:
Option C: Observation
Explanation:
The first and foremost step in the process of scientific inquiry is observation. Because, until there is no observation there are no questions to Ask. Having high quality observation is too much valuable in scientific process.
Answer: 0.811m
Explanation: Molarity is the moles of solute present per kg of solvent.
Molar mass of C10H8 = . 128.17 g/mol
No. of moles = given mass/molar mass
11.2g C10H8 = 11.2/128.17 g/mol C10H8
= 0.0874 mol C10H8
NOW 107.8g solvent (chloroform) contains 0.0879 molecules (naphthalene)
1000g '' will contain (0.0879/107.8 x 1000) mole solute
= 0.811 mole
Molarity of the solution is 0.811 m (option A)
