GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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0.25 mol
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4.0 mol
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45 mol
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320 mol
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Detailed explanation-1: -Therefore, the number of moles present in 36 g of Be is 4.
Detailed explanation-2: -Answer and Explanation: 4.00 moles of sodium has a mass of 91.96 grams. To find an element’s molar mass, you can use its atomic weight. Sodium’s molar mass is 22.99 g/mole.
Detailed explanation-3: -Answer and Explanation: There are 2.409 X 1024 atoms of magnesium in a sample of 4 moles of magnesium. Using Avogadro’s number, we know that there are 6.022 X 1023 atoms in every mole of our sample.
Detailed explanation-4: -Beryllium iodide has a molar mass of 262.821 g mol−1, which means that 1 mole of beryllium iodide has a mass of 262.821 g . To find the mass of 0.02 moles of beryllium iodide, simply multiply the number of moles by the molar mass in conversion factor form.
Detailed explanation-5: -The molar mass of beryllium atom is 9.01 g/mol.