Once the student has finished his experiment, additional steps he may take are to analyze the data gathered and draw a conclusion, then publish his findings to be seen by his peers (other students).
<h3 /><h3>What comes after the experiment?</h3>
- Once an experiment is concluded, one must go over the data gathered.
- By this, we mean to analyze the information obtained through the experiment.
- This allows the student to draw a conclusion backed by evidence.
- Once complete, it is wise to share and discuss the findings with peers.
Therefore, we can confirm that once the experiment is completed, the most common action that follows is to draw a conclusion based on the analysis of the data gathered during the experiment, then discuss the findings with peers.
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Answer:
C. Electron-negative charge
Explanation:
The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.
Symbol= e⁻
Mass= 9.10938356×10³¹Kg
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.
While neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.
Symbol of proton= P⁺
Symbol of neutron= n⁰
Mass of proton = 1.672623×10⁻²⁷ Kg
Mass of neutron = 1.674929×10⁻²⁷ Kg
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom.
Answer:
Mass of SO₄⁻² = 0.123 g.
Mass percentage of SO₄⁻² = 41.2%
Mass of Na₂SO₄ = 0.0773 g
Mass of K₂SO₄ = 0.1277 g
Explanation:
Here we have
We place Na₂SO₄ = X and
K₂SO₄ = Y
Therefore
X +Y = 0.205 .........(1)
Therefore since the BaSO₄ is formed from BaCl₂, Na₂SO₄ and K₂SO₄ we have
Amount of BaSO₄ from Na₂SO₄ is therefore;

Amount of BaSO₄ from K₂SO₄ is;

Molar mass of
BaSO₄ = 233.38 g/mol
Na₂SO₄ = 142.04 g/mol
K₂SO₄ = 174.259 g/mol
=
= 1.643·X
=
= 1.339·Y
Therefore, we have
1.643·X + 1.339·Y = 0.298 g.....(2)
Solving equations (1) and (2) gives
The mass of SO₄⁻² in the sample is given by
Mass of sample = 0.298
Molar mass of BaSO₄ = 233.38 g/mol
Mass of Ba = 137.327 g/mol
∴ Mass of SO₄ = 233.38 g - 137.327 g = 96.05 g
Mass fraction of SO₄⁻² in BaSO₄ = 96.05 g/233.38 g = 0.412
Mass of SO₄⁻² in the sample is 0.412×0.298 = 0.123 g.
Percentage mass of SO₄⁻² = 41.2%
Solving equations (1) and (2) gives
X = 0.0773 g and Y = 0.1277 g.
Answer:
diamonds are carbon based and have a giant covalent structure
Explanation:
This is what gives diamonds its strength and rigidity.
Diamonds are different from graphite due to the way the atoms are arranged
The synthesis of
Methyl Phenyl Ether is shown below,
The synthesis takes place in two steps,
Step 1: Formation of Sodium Phenoxide: Phenol being more acidic than Alcohols with
pKa ≈ 10 can loose its proton attached to oxygen atom, as the resulting phenoxide ion is stabilized by resonance. Therefore, when phenol is treated with NaOH (bBase) it looses proton and forms Sodium Phenoxide.
Step 2: Formation of Methyl Phenyl Ether: The Phenoxide ion formed in first step when treated with Dimethyl Sulfate produces Methyl Phenyl Ether through a
Williamson's Ether synthesis Reaction. Dimethyl sulfate is a well known alkylating agent when treated with phenols, thiols and amines. Dimethyl sulfate readily transfers the methyl group and forms NaSO₄CH₃.
The reaction is as follow,