Answer:
2.4 litters of water are required.
Explanation:
Given data:
Mass of LiF = 19.6 g
Molarity of solution = 0.320 M
Volume of water used = ?
Solution:
Number of moles = mass/molar mass
Number of moles = 19.6 g/ 26 g/mol
Number of moles = 0.75 mol
Volume required:
Molarity = number of moles/ volume in L
Now we will put the values in above given formula.
0.320 M = 0.75 mol / volume in L
Volume in L = 0.75 mol /0.320 M
M = mol/L
Volume in L = 2.4 L
Answer:
There's virtually no pure hydrogen on Earth because it's so reactive. Most hydrogen is made from methane [natural gas] in a process that produces carbon dioxide and other greenhouse gases. Hydrogen can also be made from water using electrolysis, but that requires electrical energy.
Explanation:
We apply the momentum preservation principle and we have.
p(before)=p(after)
0=1000×250-25m
m=10000kg or 10 tonns
Answer: If the ΔEN is between 1.6 and 2.0 and if a metal is involved, then the bond is considered ionic. If only nonmetals are involved, the bond is considered polar covalent.
Explanation:
Answer:
It is a hard ferromagnetic, silver-white, lustrous, brittle element.
It is stable in air and does not react with water.
Like other metals, it can also be magnetized.
With dilute acids, it reacts slowly.
The metal melts at 1495 °C and boils at 2927 °C
Explanation:
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