hi guys i need help in 5 qestions The formula of nitrobenzene is C6H5NO2. The mo

Question

hi guys i need help in 5 qestions

The formula of nitrobenzene is C6H5NO2. The molecular weight of this compound is amu. Question 7 How many significant figures should be retained in the result of the following calculation? Question 8 The law of constant composition applies to solutions compounds homogeneous mixtures heterogeneous mixtures solids Question 9 The atomic number indicates the number of different isotopes of an element the number of neutrons in a nucleus the total number of neutrons and protons in a nucleus the number of protons or electrons in a neutral atom the number of atoms in 1 g of an element Question 10 Which isotope has 36 electrons in an atom?

Explanation / Answer

Q6

molecular wieght = 6*12 + 5*1 + 1*14 + 2*16 = 123 amu

Q7

5

Q8.

compounds

Q9.

the number of protons or electron in a nuetral atom

Q10.

Kr

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