The answer which defines exothermic reaction is
a process in which energy is released as heat ( answer A)
<u><em>Explanation</em></u>
Exothermic reaction is a chemical reaction in which energy is released into environment in form of heat.
<u> For example of exothermic reaction</u>
Is a combustion reaction such as lighting a candle whereby oxygen react with wax to produce carbon (iV) oxide, water and heat.
Answer: 1 atom
Explanation:
The loss of the remaining valence electron results in an ion with a +2 charge. The proper way of noting the charges on these ions is to use the systematic name for each ion, nickel (I) for the +1 ion and nickel (II) for the +2 ion.
Answer:
A hydrogen bond is the attractive force between the hydrogen attached to an electronegative atom of one molecule and an electronegative atom of a different molecule. Hydrogen has a partial positive charge.
Explanation:
Answer:
I think the answer is A. 1.98 x 10^2 g
Answer:
3.45 moles Li contains 2.08 × 10 (to the power of)24 atoms .
Explanation:
The relationship between atoms and moles is:
1 mole atoms =
6.022 × 10 (to the power of)23
atoms
In order to determine how many atoms occupy a given number of moles, multiply the given moles by
6.022 × 10 (to the power of)23
atoms/mole
.
In the case of 3.45 moles lithium (Li):
3.45 mol Li × 6.022 × 10 (to the power of)23 atoms Li/ 1 mol Li =
2.08 × 10 (to the power of)24
atoms Li rounded to three
