Answer:
It should be A. I've never heard of freezing of sediments
There are two ways to represent the chemical formula of a substance: in condensed form or in structural form. Ethane is an alkane which consist of two carbon atoms. Since the general formula for ethane is CₓH₂ₓ₊₂, the condensed formula is C₂H₆. The structural formula or the line-bond structure is shown in the attached picture.
Molar mass NaCl = 58.44 g/mol
number of moles
1 mole ------ 58.44 g
? moles ----- 25 g
25 x 1 / 58.44 => 0.4277 moles
Therefore:
M = n / V
M =0.4277 / 1.5
M = 0.285 mol/L
Answer: green house affect is the sun on plants it is transfering energy to the plants to help them grow same with every plant, tree, fruit tree. everything needs sun.
Explanation: look up there.
5.54 x 10⁻³ M
<h3>
Further explanation</h3>
Given:
Neutralization reaction between:
- 25.00 ml of Ba(OH)₂
- 18.45 ml of 0.015 M HCl
Question:
What is the molarity of the Ba(OH)₂ solution?
The Process:
Let us say the molarity of the Ba (OH)₂ solution as x M.
Step-1: prepare moles for each reagent
Step-2: neutralization
We use the ICE table to see how neutralization occurs between acid and base.
Balanced reaction:
Initial: 25x 0.277 - -
Change: - ¹/₂ · (0.277) -0.277 +¹/₂ · (0.277) +0.277
Equlibrium: - - +¹/₂ · (0.277) +0.277
- Neutralization causes no excess of hydrogen or hydroxide ions in solution. In the end, the number of acid and base reactions is balanced. In other words, the two reagents have run out with nothing left.
- HCl acts as a limiting reagent.
Step-3: calculate the molarity of the Ba(OH)₂ solution.
We consider Ba (OH) from the initial, change, and equilibrium stages.
Thus, the molarity of the Ba(OH)₂ solution is 5.54 x 10⁻³ M.
_ _ _ _ _ _ _ _ _ _
Alternative Steps
- Valence of base = the number of OH⁻ ions
- Valence of acid = the number of H⁺ ions
Neutralization:
Thus the same results were obtained. The molarity of Ba (OH) ₂ solution is 5.54 x 10⁻³ M.
<h3>
Learn more</h3>
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