Answer:
B. Melting
Explanation: Process of elimination
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Limestone eventually erodes away, you can see it actually happening in natural caves quite often
This is a
redox reaction where oxidation and a reduction occur.
<span>Here, Mg goes to Mg²</span>⁺ <span>by changing
its oxidation
number from 0 to +2 while S goes
to S²</span>⁻ <span>by reducing its oxidation
state from 0 to -2 .
Hence Mg is
oxidized by S in the
reaction.</span>
Reducing agent <span>is a substance which reduces other
substance by oxidizing itself. Hence, the reducing
agent of this reaction
is <span>Magnesium.</span></span>
Answer: 3: visible region of the electromagnetic spectrum
Explanation:
Source: “trust me bro”
Answer:
1. False
2. False
3. True
4. False
Explanation:
1. CBr4 is more volatile than CCl4 False
The molecular weight of CBr4 is is greater than the CCl4, therefore it has less tendency to escape to the gas phase. Also, the CBr4 has greater London dispersion forces compared to CCl4 since bromine is a larger atom than chlorine.
2. CBr4 has a higher vapor pressure at the same temperature than CCl4 False
For the same reasons as above, the vapor pressure of CBr4 is smaller than the vapor pressure of CCl4
3. CBr4 has a higher boling point than CCl4 True
Again, CBr4 having a molecular weight greater than CCl4 ( 331 g/mol vs 158.2 g/mol) is heavier and less volatile with a higher boiling point than CCl4.
4. CBr4 has weaker intermolecular forces than CCl4 False
Both molecules are non-polar because the dipole moments in C-Cl and C-Br bonds cancel in the tetrahedron. The only possible molecular forces are of the London dispersion type which are temporary and greater for larger atoms.