Answer: initial temp of metal= 100 C
initial temp of water= 22.6 C
Final temp of both= 23.3 C
Explanation:
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Answer:
2.17 mol
Explanation:
Given data:
Number of moles of potassium = 4.34 mol
Moles of hydrogen gas produced at STP = ?
Solution:
Chemical equation:
2K + 2H₂O → 2KOH + H₂
Now we will compare the moles of hydrogen and potassium.
K : H₂
2 : 1
4.34 : 1/2×4.34 = 2.17 mol
So, from 4.34 moles of potassium 2.17 moles of hydrogen are produced at STP.
A 50.0 ml sample of 0.108 m h2so4 is diluted to 250.0 ml. Its new molarity will be 0.0216 m.
Dilution would be the process of lowering a solute's concentration in a solution. It usually just includes combining the solution with much more solvent, such as water. A solution is diluted when more solvent is added without increasing solute.
Molarity can be calculated by using the formula:
where, M is molarity and V is volume.
Given data:
= 0.108 m
= 50 ml
= 250 ml
Put the value of given data in above equation.
0.108 m × 50 ml = M × 250ml
M = 0.0216 m
Therefore, the new molarity will be 0.0216 m.
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Titanium can't be extracted by reducing the ore using carbon as a cheap reducing agent. The problem is that titanium forms a carbide, TiC, if it is heated with carbon, so you don't get the pure metal that you need. The presence of the carbide makes the metal very brittle.
<span>That means that you have to use an alternative reducing agent. In the case of titanium, the reducing agent is either sodium or magnesium. Both of these would, of course, first have to be extracted from their ores by expensive processes. </span>