Answer: A. Decomposition.
Explanation: This is a reaction when a compound breaks down to form two and/or more easier substances. When this reaction turns into a single replacement, only one element is placed there for basically filling in for another element that is in a compound that is similar to the one before. That being said about the substances, this reaction is a big part because it takes away substances, then replaces them with newer and similar ones each time it has completed it's work. It's just a long train of work for Decomposition.
I hope this helps you!
Answer:
Density = mass/volume
= 44/22.4
= 1.96 gram/liter
The density of the Carbon Dioxide at S.T.P. (Standard Temperature and Volume) is 1.96 gram/liter.
Helium, bromine, agron, neon,flourine
Answer:
2.5 mol·L⁻¹
Explanation:
Ca(OH)₂(aq) ⟶ Ca²⁺(aq) + 2OH⁻(aq)
I/mol·L⁻¹ : 2.5 0 0
C/mol·L⁻¹: -2.5 +2.5 +5.0
F/mol·L⁻¹: 0 2.5 5.0
Ca(OH)₂ is a strong electrolyte. It dissociates completely in solution to form ions
Initial
Assume you dissolve 2.5 mol of Ca(OH)₂ in enough water to make 1 L of solution.
In the instant before it dissociates, you have a 2.5 mol·L⁻¹ solution of Ca(OH)₂ and no Ca²⁺ ions.
Change
The Ca(OH)₂ is dissociates completely into ions. You lose 2.5 mol of Ca(OH)₂ and form 2.5 mol of Ca²⁺.
Final
You end up with no formula units of Ca(OH)₂ and 2.5 mol of Ca²⁺.