To find the net ionic equation we must first write the balanced equation for the reaction. We must bear in mind that the reagents Ca(NO3)2 and Na2S are in the aqueous state and as product we will have CaS in the solid state, since it is not soluble in water and NaNO3 in the aqueous state.
The balanced equation of the reaction will be:
Ca(NO3)2(aq) + → Ca(aq) + 2Na(s)NO3Now, c(aq)ompounds in the aqueous state can be written in their ionic form, so the reaction will transform into:Na2S +
So, the answer will be option A
Answer:
P waves are the type of earthquake wave which can travel through both liquids and solids.
Explanation:
Energy can be transferred during earthquake in the form of waves. These waves are termed as seismic waves. Mostly seismic waves are classified as body waves and surface waves. The body waves have higher frequency compared to surface waves. And thus surface waves can only travel or propagate through the surface of planet and not through fluids. But body waves can travel through solids as well as fluids based on their types. So among the given options and one type of body waves is P waves.
P waves are also known as Primary waves and they can travel through both liquids and solids.
Oxygen gains two electrons when it bonds to form a complete outer shell and magnesium loses two electrons when bonding to gain its full outer shell.
As electrons are negative, the oxygen (which gains electrons) will become negative and the magnesium (which loses electrons) will become positive.
The negative and positive ions will then attract to one another due to the magnetic pull of the positive and negative.
AB₂(s) ⇄ A²⁺(aq) + 2B⁻(aq)
Ksp=[A²⁺][B⁻]²
a=1.10 g/L
M=169 g/mol
c=a/M
[A²⁺]=c=a/M
[B⁻]=2c=2a/M
Ksp=(a/M)(2a/M)²=4(a/M)³
Ksp=4*(1.10/169)³=1.103×10⁻⁶
Hey there!
Molar mass NaCl = 58.44 g/mol
number of moles:
n = m / mm
n = 15.0 / 58.44
n = 0.2566 moles of NaCl
Volume in Kg :
50.0 g / 1000 => 0.05 Kg
Therefore :
Molality = moles of solute / volume
Molatity = 0.2566 / 0.05
Molality = 5.132 mol/kg