Answer : The mass of 
is, 295.323 grams
Solution :
First we have to calculate the moles of 
.
Now we have to calculate the moles of NaBr.
The balanced chemical reaction is,
From the balanced reaction we conclude that
As, 2 moles of react with 2 moles of
So, 2.87 moles of react with 2.87 moles of
Now we have to calculate the mass of NaBr.
Therefore, the mass mass of is, 295.323 grams
Selfmade.ivyy hope this help
The oxidation is occurring on Calcium ions as it release one electron and reduction will be occurring on fluorine ion as it accepts one electron.
<u>Explanation:</u>
An element will undergo oxidation and form a positive ion on releasing one or more electrons from its valence shell. While reduction is occurred in a chemical reaction, then the element will be forming a negative ion with the acceptance of one or more electrons in its valence shell.
So in the given process of calcium fluoride, the one electron from the valence shell of calcium will be released making it as 
ions and this is termed as oxidation process. This one electron will be getting accepted by the fluorine ion and thus it will convert to 
ions. This process of acceptance of electrons is termed as reduction.
Metals generally form cations, meaning they become positively charge - this positive charge is due to the loss of electrons.
Answer:
Cl EN < O EN < F EN
Explanation:
Electronegativity is a periodic property that indicates the tendency of an atom to attract electrons when combined with another element. It is very useful for predicting the type of bonding of compounds, so it is not possible to talk about electronegativity in elements in a fundamental state.
In the periodic table the electronegativity increases diagonally and the values were established in the so-called Pauling scale.
It is expected that elements with high electron affinity and high ionization energy possess considered electronegativity, so the group of nonmetals have high electronegativity, in fact flour is the most electronegative element
