hasil dari 21:3/7 adalah pake cara yaa
Answer (4)
The gram-formula mass of Fe(NO₃)₃ is 242 g/mol. Therefore, option D is correct.
Gram-formula mass is also known as the molar mass . It refers to the mass of one mole of a substance. It is expressed in units of grams per mole (g/mol) and is commonly used in chemistry to relate the amount of a substance to its mass.
The **atomic **mass of Iron= 56 amu.
The atomic mass of Nitrogen = 14 amu.
The atomic mass of Oxygen = 16 amu.
Gram-formula **mass **of Fe(NO₃)₃ = (Atomic mass of Fe) + 3 × {(Atomic mass of N × 1) + (Atomic mass of O × 3)}
= 56 + 3 × (14 × 1 + 16 ×3)
= 56 + 3 × (14 + 48)
= 56 + 3 × 62
= 56 + 186
= 242 g/mol
Therefore, the gram-formula **mass **of Fe(NO₃)₃ is 242 g/mol.
Learn more about gram-formula mass , here:
https://brainly.com/question/1405970
#SPJ6
The gram-formula mass of Fe(NO₃)₃, is 242 g/mol, calculated by considering the molar masses of iron, nitrogen, and oxygen and adding them together.
The gram-formula mass of Fe(NO₃)₃, is 242 g/mol. To calculate this, we need to consider the atomic masses of each element present in the compound: Fe = 55.85 g/mol, N = 14.01 g/mol, and O = 16.00 g/mol. By adding the molar masses for each element in Fe(NO₃)₃, we get 55.85 + (3 x 14.01) + (9 x 16.00) = 242 g/mol.
The gram-formula mass of Fe(NO 3 ) 3 is calculated to be approximately 242 g/mol, matching option 4. This involves adding the contributions from iron, nitrogen, and oxygen in the formula. Thus, the correct answer is option 4.
;
Jawaban:[tex]21 \div \frac{3}{7} = 21 \times \frac{7}{3} = \frac{147}{3} = 49[/tex]Penjelasan dengan langkah-langkah:Apalagi anda menemukan pembagian pecahan, maka ubah ke bentuk perkalian dengan cara membalikkan bentuk pecahan si pembagi ( atau gampangnya di bagian yang sebelah kanan yang dibalik)
