Question

H2S=1*2+32=34 распишите пожалуйста так)Cu2O, P2O5, H3PO4, заранее спасибо)

Answer 1

Cu2O = 2*64 + 16=144
P2O5 = 2*31+5*16=142
H3PO4=3*1+1*31+4*16=98

Answer 2

H2S: H - hydrogen (atomic number 1) has a mass of 1 S - sulfur (atomic number 16) has a mass of 32 Therefore, the molar mass of H2S is 34 g/mol.

Cu2O: Cu - copper (atomic number 29) has a mass of 63.5 O - oxygen (atomic number 8) has a mass of 16 Since there are two copper atoms in Cu2O, the molar mass of Cu2O is (2*63.5) + 16 = 143 g/mol.

P2O5: P - phosphorus (atomic number 15) has a mass of 31 O - oxygen (atomic number 8) has a mass of 16 Since there are two phosphorus atoms and five oxygen atoms in P2O5, the molar mass of P2O5 is (2*31) + (5*16) = 142 g/mol.

H3PO4: H - hydrogen (atomic number 1) has a mass of 1 P - phosphorus (atomic number 15) has a mass of 31 O - oxygen (atomic number 8) has a mass of 16 Since there are three hydrogen atoms, one phosphorus atom, and four oxygen atoms in H3PO4, the molar mass of H3PO4 is (3*1) + 31 + (4*16) = 98 g/mol.

I hope this helps! Let me know if you have any further questions.