Hydrogen is different from alkali metals because it also exhibits the properties of inert gas
Characteristics of reliable scientific explanations are present in the development of the atomic theory in the given passage.
<h3>What is atomic theory?</h3>
Atomic theory is the scientific theory that matter is composed of particles called atoms.
The discoveries of subatomic particles such as;
- electron by J.J. Thomson
- proton by Ernest Rutherford
- neutron by James Chadwick
- nucleus by Ernest Rutherford
all contributed in the development of the atomic theory.
From the information given in the passage J.J. Thomson experiment gave rise to atomic model while Rutherford, Geiger and Ernest Marsden, performed the experiment that discovered nucleus and proton.
Thus, characteristics of reliable scientific explanations are present in the development of the atomic theory in the given passage.
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Answer:
A. Do not change their energy level.
Explanation:
The process in which a solid changes directly to a gas is called sublimation. It occurs when the particles of a solid absorb enough energy to completely overcome the force of attraction between them. Dry ice (solid carbon dioxide, CO2) is an example of a solid that undergoes sublimation.
Answer:
The final volume of the copper (ii) sulfate solution = 93.6 mL
<em>Note: The question is incomplete. The complete question is given below:</em>
<em>A chemist must dilute 37.0 mL of 602. mM aqueous copper(II) sulfate (Cuso4) solution until the concentration falls to 238. mM. He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in milliliters. Be sure your answer has the correct number of significant digits.</em>
Explanation:
Using the equation of dilution, C₁V₁ = C₂V₂
where C₁ = initial concentration
V₁ = initial volume
C₂ = final concentration
V₂ = final volume
For the aqueous solution of copper (ii) sulfate
C₁ = 602 mM; V₁ = 37.0 mL; C₂ = 238 mM; V₂ = ?
Making V₂ subject of formula
V₂ = C₁V₁/C₂
V₂ = (602 mM * 37.0 mL)/238 mM
V₂ = 93.6 mL
Therefore, the final volume of the copper (ii) sulfate solution = 93.6 mL
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