Answer:
Mass = 26.50 g
Explanation:
Given data:
Mass of sodium carbonate = ?
Molarity of solution = 0.25 M
Volume of solution = 1.00 L
Solution:
Molarity = number of moles / volume in litter
0.25 M = number of moles / 1.00 L
Number of moles = 0.25 M × 1.00 L
Number of moles = 0.25 mol
Mass:
Mass = number of moles × molar mass
Mass = 0.25 mol × 106 g/mol
Mass = 26.50 g
Answer:
6.2g of NaBr are produced
Explanation:
The reaction of HBr with NaOH occurs as follows:
HBr + NaOH → NaBr + H2O
<em>Where 1 mole of each reactant produce 1 mole of NaBr</em>
To solve this question we need to find the moles of each reactant using their molar mass. With moles we can find limiting reactant and the moles (And mass) of NaBr produced, as follows:
<em>Moles HBr -Molar mass: 80.9119g/mol)-</em>
4.9g * (1mol/80.9119g) = 0.0606 moles HBr
<em>Moles NaOH -Molar mass: 40g/mol-</em>
3.86g * (1mol/40g) = 0.0965 moles NaOH
As the reaction is 1:1 and the moles of HBr < Moles NaOH, the limiting reactant is HBr and moles of NaBr produced are 0.0606 moles.
The mass of NaBr (Molar mass: 102.894g/mol) is:
0.0606 moles * (102.894g/mol) =
<h3>6.2g of NaBr are produced</h3>
Answer:
d) el niño would lead to the death of organisms or populations
Explanation:
if it dissolves in water the ions fade away. Water molecules will surround the ions, to form hydration sphere around the ions of lithium bromide in a solution. Ions instead of interacting with each other will start interacting with water molecules by which they will get dissolvoved in water