It was named the Qumran seas scrolls.
Electronegativity is a measure of the ability of an atom to attract electrons. The value tends to increase on moving from left to right across a period in the periodic table. This is because as the atomic number increases so does the nuclear charge which causes the added electron to experience a stronger nuclear attraction.
For example, if the consider the second period, then Lithium which is present in the extreme left will show a greater tendency to lose electrons (lower electronegativity) while Fluorine present in the extreme right will show a greater tendency to attract electrons and therefore high electronegativity. Thus, when Li and F combine, they form what is called an ionic bond.
Ans C) True statement
Answer:
Mass of Fe = 32.55 g
Explanation:
Molar Mass of Fe atom = 55.845 g/mol
It means,
1 mole of Fe contains = 55.845 g ..............(1)
From mole concept,
<u>1 mole </u>of Fe contain = atom ..........(2)
Replace 1 mole in equation (2) by 55.845 g , it become :
55.845 g of Fe contain = atoms
Reverse the equation now
atoms of Fe contain =55.845 g
1 atom of Fe contain = g
atom contain =
on calculation,
atom contain = 32.55 g of Fe
Mass of Fe = 32.55 g
Answer:
0.7692 M ≅ 0.77 M.
Explanation:
- It is known that the no. of millimoles of a solution before dilution is equal to the no. of millimoles of the solution after the dilution.
<em>(MV) before dilution = (MV) after dilution.</em>
M before dilution = 2.0 M, V before dilution = 0.25 L.
M after dilution = ??? M, V after dilution = 0.25 L + 0.40 L = 0.65 L.
∴<em> M after dilution = (MV) before dilution/(V) after dilution</em> = (2.0 M)(0.25 L)/(0.65 L) =<em> 0.7692 M ≅ 0.77 M.</em>
Density option A is the answer