Question

" I 다 Обчисліть: :Mr(N2) =Mr(P205) =Mr(H2SiO3) =Mr(Al(OH)3)=Mr(Ca3(PO4)2 =Mr (CO2) =Mr(FeO) =​

Answer 1

Ответ:

Объяснение:

Mr(N2) =  Ar(N2)=14*2=28  

Mr(P205) =  Ar(P2)+ Ar(O5)= 31*2+16*5=142

Mr(H2SiO3) =  Ar(H2)+Ar(Si)+ Ar(O3) = 1*2 + 28 + 16*3 = 78

Mr(Al(OH)3)=  Аr(Al) + 3*Аr(О) + 3*Аr(Н) = 27 + 3*16 + 3*1 = 27 + 48 + 3 = 78

Mr(Ca3(PO4)2 =   Аr(Ca3) + 2*Аr(P) + 2*Аr(O4)=40*3+2*31+ 4*16*2= 310

Mr (CO2) =  Аr(C) + Аr(O2) = 12+16*2=44

Mr(FeO) = Аr(Fe) + Аr(O)=​ 56 + 16= 72  

Answer 2

It looks like you're asking for the molar masses (molecular weights) of various chemical compounds. Here are the molar masses for the compounds you've mentioned:

• Mr(N2) = Molar mass of nitrogen gas (N2) = 28.02 g/mol
• Mr(P2O5) = Molar mass of diphosphorus pentoxide (P2O5) = 141.94 g/mol
• Mr(H2SiO3) = Molar mass of silicic acid (H2SiO3) = Approximately 78.09 g/mol (Note: This compound doesn't have a standard formula, so the molar mass might vary slightly based on the exact structure.)
• Mr(Al(OH)3) = Molar mass of aluminum hydroxide (Al(OH)3) = 78.00 g/mol
• Mr(Ca3(PO4)2) = Molar mass of calcium phosphate (Ca3(PO4)2) = 310.18 g/mol
• Mr(CO2) = Molar mass of carbon dioxide (CO2) = 44.01 g/mol
• Mr(FeO) = Molar mass of iron(II) oxide (FeO) = 71.85 g/mol

Please note that these values are approximate and can vary slightly based on the isotopic composition of the elements involved. Always make sure to use the most accurate molar mass values for your calculations.