If 21.4 grams of hydrogen reacts completely with 120.3 grams of oxyge to form hydrogen peroxide, what percent by mass of hydrogen in hydrogen peroxide?

In its pure form, it is a very pale blue liquid, slightly more viscous than water. Hydrogen peroxide is the simplest peroxide (a compound with an oxygen–oxygen single bond).

i think slash and

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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