Science is applied in all parts of our lives. Firefighters use science by knowing what causes fire and what circumstances are necessary for a fire to occur naturally. for example knowing the chemical composition of hay required in order for it to self ignite on fire helps to take measurements and prevent unwanted fires.
Water is called a "universal solvent' due to its ability to dissolve many substances. It can dissolve almost all substances. For every substance, water takes its own time to dissolve it. This is due to the polarity present in it.
Valence.
The electrons in the outer shell of an atom are called valence electrons.
Valence electrons determine whether the an element is ready form compounds. These electrons can be gained, lost, or shared in the formation of compounds.
The number of particles that are in 12.7 moles of compound that Jessica had is 7.65 x10^24 particles of compound ( answer E)
<u><em>Calculation</em></u>
<u><em> </em></u>The number of particles are calculated using the Avogadro's Principle constant.
- that is according to Avogadro's 1 moles = 6.02 x10^23 particles
what about 12.7 moles of compound= ? particles\
by use of cross multiplication
- number of particles of compound= [12.7 moles x (6.02 x 10^23)] / 1 mole = 7.65 x 10^24 particles of compound ( answer E)
N.b moles and moles cancels each other