Easy Chemistry Class 11 Level 4

How many moles of H2 are present in 2 g of H2?

2 ग्राम H2 में कितने मोल H2 होंगे?

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Correct Answer

A. 1 mol

Explanation

Step 1: This is based on moles = mass/molar mass. Step 2: Molar mass of H2 is 2 g mol^-1, so 2/2 = 1 mol. Step 3: Exam tip: remember molar masses of diatomic molecules like H2, O2 and N2.

Step 1: यह mole = mass/molar mass पर आधारित है। Step 2: H2 का molar mass 2 g mol^-1 है इसलिए 2/2 = 1 mol। Step 3: परीक्षा टिप: H2, O2, N2 जैसे diatomic molecules के molar mass याद रखें।

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