Question

Mr(NaCl)Mr(K2So4)Mr(H2CO3)Mr(Cu2O)Mr(NH3) Mr(NH4)2SO4)Mr(K4Fe(CN)6)​

Answer 1

Ответ:

Объяснение:

Mr(NaCl)=23+35.5=58.4

Mr(K2So4)=39×2+32+16×4=174

Mr(H2CO3)=1×2+12+16×3=62

Mr(Cu2O)=63×2+16=142

Mr(NH3)=14+1×3=17

Mr(NH4)2SO4)=14×2+1×2×4+32+16×4=132

Mr(K4Fe(CN)6)​=39×4+55+12×6+14×6= 367

Answer 2

Mr(NaCl) = 23+ 35,5= 58,5

Mr(K2SO4)=40*2+32+16*4=176

Mr(H2CO3)=1*2+12+16*3=62

Mr( Cu2O)= 63*2+16= 142

Mr(NH3)= 14+1*3=17

Mr(NH4)2SO4)=(14+1*4)*2+32+16*4=208

Answer 3

It looks like you've provided a list of chemical formulas, possibly asking for their molar masses (Mr). I'll calculate the molar masses for each of the compounds you've listed:

1. NaCl (Sodium Chloride):

   • Sodium (Na) molar mass: 22.99 g/mol
   • Chlorine (Cl) molar mass: 35.45 g/mol
   • Molar mass of NaCl: 22.99 + 35.45 = 58.44 g/mol

2. K2SO4 (Potassium Sulfate):

   • Potassium (K) molar mass: 39.10 g/mol
   • Sulfur (S) molar mass: 32.07 g/mol
   • Oxygen (O) molar mass: 16.00 g/mol
   • Molar mass of K2SO4: 39.10 * 2 + 32.07 + 16.00 * 4 = 174.26 g/mol

3. H2CO3 (Carbonic Acid):

   • Hydrogen (H) molar mass: 1.01 g/mol
   • Carbon (C) molar mass: 12.01 g/mol
   • Oxygen (O) molar mass: 16.00 g/mol
   • Molar mass of H2CO3: 1.01 * 2 + 12.01 + 16.00 * 3 = 61.02 g/mol

4. Cu2O (Copper(I) Oxide):

   • Copper (Cu) molar mass: 63.55 g/mol
   • Oxygen (O) molar mass: 16.00 g/mol
   • Molar mass of Cu2O: 63.55 * 2 + 16.00 = 143.10 g/mol

5. NH3 (Ammonia):

   • Nitrogen (N) molar mass: 14.01 g/mol
   • Hydrogen (H) molar mass: 1.01 g/mol
   • Molar mass of NH3: 14.01 + 1.01 * 3 = 17.03 g/mol

6. NH4)2SO4 (Ammonium Sulfate):

   • Nitrogen (N) molar mass: 14.01 g/mol
   • Hydrogen (H) molar mass: 1.01 g/mol
   • Sulfur (S) molar mass: 32.07 g/mol
   • Oxygen (O) molar mass: 16.00 g/mol
   • Molar mass of NH4)2SO4: 14.01 * 2 + 1.01 * 8 + 32.07 + 16.00 * 4 = 132.14 g/mol

7. K4Fe(CN)6 (Potassium Ferricyanide):

   • Potassium (K) molar mass: 39.10 g/mol
   • Iron (Fe) molar mass: 55.85 g/mol
   • Carbon (C) molar mass: 12.01 g/mol
   • Nitrogen (N) molar mass: 14.01 g/mol
   • Molar mass of K4Fe(CN)6: 39.10 * 4 + 55.85 + 12.01 + 14.01 * 6 = 368.35 g/mol

Please note that these molar masses are approximate and rounded to two decimal places.