ক্যালসিয়াম ফসফেটের ১৩ মোলের আণবিক ভর কত?
To solve this problem, let's analyze it step-by-step:

Step-1: Here, we know that the chemical formula of  Calcium Phosphate is Ca₃(PO₄)₂

Step-2: The atomic mass of Ca (Calcium) is 40.08 ≈ 40 (rounding), atomic mass of P (Phosphorus) is 30.97 ≈ 31 (rounding) and the atomic mass of O (Oxygen) is 16.

Step-3: So, total mass for 1 mole of  Ca₃(PO₄)₂ is (40*3 + (31 + 16*4)*2) = 310

Step-4: We have to find the mass for 13 moles of  Ca₃(PO₄)₂. So, mass for 13 moles is 13*310 = 4030         

#Answer: 4030