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স্বাভাবিক রক্তে কোলেস্টের
(
C
27
H
46
O
)
এর ঘনমাত্রা 0.005 M হলে 750 mL রক্তে কত গ্রাম কোলেস্টের থাকে?
2.9
0.1
0.2
1.4
ANSWER : 4
Descrption
<p style="margin-left:0px;">0.005 M means 0.005 moles of substance in 1 L of solution.</p><p style="margin-left:0px;">In this case, the substance is cholesterol which has a molar mass of 387 g / mol</p><p style="margin-left:0px;">750 ml blood x 1 L / 1000 ml = 0.75 L</p><p style="margin-left:0px;">0.75 L x 0.005 mol / L = 0.00375 mols</p><p style="margin-left:0px;">0.00375 mols x 387 g / mol = 1.45125 g = 1.4 g ( sig. fig.)</p>
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