We can use any solution containing chloride ions as NaCl solution or even dilute HCl due to mercurous Hg₂²⁺ is from group I cations which precipitated as chloride while Sr²⁺ is from group V
Net ionic equation:
Hg₂²⁺ + 2 Cl⁻ → Hg₂Cl₂ (white precipitate)
while SrCl₂ is soluble salt<span />
Answer:
The discovery of electron by j.j Thomson rejected the Dalton theory.
He stated that atom can be divided into its subatomic particles.
Explanation:
Dalton stated that atom is an indivisible particle. It can not be further subdivided.
The discovery of electron by j.j Thomson rejected the Dalton theory.
He stated that atom can be divided into its subatomic particles.
The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.
Symbol= e-
Mass= 9.10938356×10-31 Kg
It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
He constructed the glass tube and create vacuum in it. He applied electric current between electrodes. He noticed that a ray of particles coming from cathode to wards positively charged anode. This ray was cathode ray.
Properties of cathode ray:
The ray is travel in straight line.
The cathode ray is independent of composition of cathode.
When electric field is applied cathode ray is deflected towards the positively charged plate.
Hence it was consist of negatively charged particles.
Answer:
Not approved but I think 4(-393.5)+ 2(-241.8)) – (2(227) + 5(0))
The enthalpy change is -2511.6.
Explanation:
Answer:
element A has a mass of 2 units, while an atom of element B
has a mass of 5 units, what would be the mass of the
compound A3 B2
Explanation:
Sodium Azide in an air bag = 39g
Converting the given grams in to moles, that is 1 mole = 65 grams
Sodium Azide in moles = 0.6
From the equation there are 2 moles of Sodium Azide and there are 3 moles of N
Calculating the N2 in moles = (3 x 0.6)/2 = 0.9 moles of N2
Calculating the molecular mass of N = 0.90 x 6.022 x 10^23 = 5.42 x 10^23.