Question

what this ??????? ....... ​

Answer 1

Answer:

4.Zn₃(PO₄)₂

5.The atomic mass (ma or m) is the mass of an atom. Although the SI unit of mass is kilogram (symbol: kg), the atomic mass is often expressed in the non-SI unit dalton (symbol: Da, or u) where 1 dalton is defined as 1⁄12 of the mass of a single carbon-12 atom, at rest.[1] The protons and neutrons of the nucleus account for nearly all of the total mass of atoms, with the electrons and nuclear binding energy making minor contributions. Thus, the numeric value of the atomic mass when expressed in daltons has nearly the same value as the mass number. Conversion between mass in kilograms and mass in daltons can be done using the atomic mass constant {\displaystyle m_{\rm {u}}={{m({\rm {^{12}C}})} \over {12}}=1\ {\rm {Da}}}{\displaystyle m_{\rm {u}}={{m({\rm {^{12}C}})} \over {12}}=1\ {\rm {Da}}}.

3.54gof N2O2

Answer 2

3.Which has the largest number of molecules?

Ans:-36g of H2O

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4.The molecular formula of Zinc Phosphate is

Ans:-Zn3(PO4)2

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5.the accepted unit of atomic mass and molecular mass is

Ans:-amu

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