Semi-conductor,brittle not malleable or ductile.
Answer:
c
Explanation:
thw observation of water that is added
Answer:
0.5 M NaOH solution
Explanation:
Initially, we have 0.25L or 250 mL of 8M NaOH solution
Which means that 1L of this solution would have 8 moles of NaOH
Moles present in 250 mL of solution:
Molarity * Volume( in L)
8 * 0.25 = 2 moles
There is 2 moles of NaOH in 0.25 L of the provided NaOH solution
More water is going to be added to this solution but the number of moles of NaOH will remain the same
now that the solution has a volume of 4L after adding the additional water, we have a 4L solution which contains 2 moles of NaOH
Molarity of the new solution:
Molarity = Number of moles in solution / Volume of solution
Molarity = 2 / 4
Molarity = 0.5 M
<h3>Answer:</h3>
6 Hydrogen Atoms
<h3>Explanation:</h3>
The balance chemical equation is as follow is as follow,
N₂ + 3 H₂ → 2 NH₃
According to this equation, one molecule of Nitrogen when reacted with 3 molecules of Hydrogen (Reduction reaction) produces two molecules of Ammonia.
Hence, as one molecule of NH₃ contains three Hydrogen atoms then 2 NH₃ will contain six Hydrogen atoms.
You have to use Avogadro's number which is 6.02×10²³ which tells you the number of particles in 1 mole of a sample.
6a) 2mol Fe²⁺
(2mol Fe²⁺)×(6.02×10²³ions/mol)=<span>1.2×10²⁴ ions of Fe²⁺
</span>6b) 4.5mol BCl₃
(4.5mol BCl₃)×(6.02×10²³ molecules/mol)=2.7×10²⁴molecules of BCl₃
I hope this helps. Let me know if anything is unclear.
