Answer:
26.5 g
Explanation:
First we convert 100.0 mL to L:
- 100.0 mL / 1000 = 0.100 L
Now we <u>calculate how many moles of sodium carbonate are needed</u>, using the <em>definition of molarity</em>:
- Molarity = moles / liters
- moles = molarity * liters
- 2.5 M * 0.100 L = 0.25 mol
Finally we <u>convert 0.25 moles of sodium carbonate into grams</u>, using its <em>molar mass</em>:
- 0.25 mol * 106 g/mol = 26.5 g
An atom of any element must contain...
an equal number of protons and electrons
Explanation:
The reaction can be said to be a single replacement reaction if one substance in a chemical reaction is replacing another one.
For example:
A + BC → AC + B
In such reactions there is a replacement of a metallic ion in solution by a metal atom higher in the activity series than the metal in solution.
The relative positions of the two elements in the activity series provides the driving force for a single replacement reaction. If one element that is to replace another in a compound is more active, the reaction will occur. If it is less reactive, there will be no reaction.