Answer:
a is write
Explanation:
Why are all ionic compounds crystalline in structure?
Ionic compounds are generally hard, but brittle. ... The repulsive forces between like-charged ions cause the crystal to shatter. When an ionic crystal breaks, it tends to do so along smooth planes because of the regular arrangement of the ions.
Answer:
7.16 × 10⁻³ M
Explanation:
Let's consider the reduction reaction of copper during the electroplating.
Cu²⁺(aq) + 2 e⁻ ⇒ Cu(s)
We can calculate the moles of Cu²⁺ present in the solution using the following relations.
- 1 mole of electrons has a charge of 96486 C (Faraday's constant).
- 1 mole of Cu²⁺ is reduced when 2 moles of electrons are gained.
The moles of Cu²⁺ reduced are:
![2.30 min \times \frac{60s}{1min} \times \frac{3.00C}{s} \times \frac{1mole^{-} }{96486C} \times \frac{1molCu^{2+} }{2mole^{-} } = 2.15 \times 10^{-3} molCu^{2+}](https://tex.z-dn.net/?f=2.30%20min%20%5Ctimes%20%5Cfrac%7B60s%7D%7B1min%7D%20%5Ctimes%20%5Cfrac%7B3.00C%7D%7Bs%7D%20%5Ctimes%20%5Cfrac%7B1mole%5E%7B-%7D%20%7D%7B96486C%7D%20%5Ctimes%20%5Cfrac%7B1molCu%5E%7B2%2B%7D%20%7D%7B2mole%5E%7B-%7D%20%7D%20%3D%202.15%20%5Ctimes%2010%5E%7B-3%7D%20molCu%5E%7B2%2B%7D)
of Cu²⁺ are in 0.300 L of solution.
[Cu²⁺] = 2.15 × 10⁻³ mol/0.300 L = 7.16 × 10⁻³ M
Explanation:
there it is fella tried on ma own consciousness
Answer:
Density, ![d=24.68\ g/cm^3](https://tex.z-dn.net/?f=d%3D24.68%5C%20g%2Fcm%5E3)
Explanation:
Given that,
Mass of marble slab is 38.6 kg or 38600 g
The dimensions of the slab is 23 cm × 17 cm ×4 cm
We know that the density of an object is given in terms of its mass volume as follows :
![d=\dfrac{\text{mass}}{\text{volume}}\\\\d=\dfrac{38600\ g}{1564\ cm^3}\\\\d=24.68\ g/cm^3](https://tex.z-dn.net/?f=d%3D%5Cdfrac%7B%5Ctext%7Bmass%7D%7D%7B%5Ctext%7Bvolume%7D%7D%5C%5C%5C%5Cd%3D%5Cdfrac%7B38600%5C%20g%7D%7B1564%5C%20cm%5E3%7D%5C%5C%5C%5Cd%3D24.68%5C%20g%2Fcm%5E3)
So, the density of the marble slab is ![24.68\ g/cm^3](https://tex.z-dn.net/?f=24.68%5C%20g%2Fcm%5E3)
Atom is the smallest unit retaining properties of elements