7.5 grams of sodium is heated on a hot plate. If the temperature of the sodium increases from 22.0 °C to 35.0 °C, how much heat does the sodium absorb?

Calcium chloride +gold(1) oxide—>

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as