Answer:
gas
Explanation:
It is a gas because it can't be seen for long or at all in the air.
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>
A solution is when you have a solute and a solvent, for example, sugar and water. Since copper and silver are solids, they cannot physically be dissolved in each other. Think of it as a mix of granola and raisins. The silver is the granola and the copper is the raisins. Now, if silver were to be mixed with nitric acid, a liquid, it would be different.
Answer:
either deep currents and tides or waves and surface currents. surface currents makes sense to me.
Explanation:
i took the test twice and it isnt tides and waves or surface currents and deep currents
Answer:
0.001968 M min-1
Explanation:
NH2NO2(aq) --> N2O(g) + H2O(l)
[NH2NO2],M 0.978 0.476 0.232 0.113
time, min 0 255 510 765
The average rate of disappearance over the time period form t = 0 min to t = 255 min is given as;
Average rate = Change in concentration / time taken
Change in concentration = Final Concentration - Initial concentration
Change = 0.476 - 0.978 = 0.502
time taken = 255min - 0min = 255 min
Average rate = 0.502 / 255 = 0.001968 M min-1