How many moles are in 4.21 x 10^20 atoms of He? OA) 2.53 x 1044 mol
O B) 25.3 mol
O C) 6.99 x 10-4 mol
OD) 1.69 x 1021 mol

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the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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i believe the answer is three water molecules