Answer:
The heat would flow from the hot solid to the cool solid until all temperatures are near equal.
At high altitudes, air pressure is lower. That means that the boiling point of water is lower as well (lower air pressure means that water molecules need less energy to turn into gas), and because the water is boiling at a lower temperature it takes longer for it to cook the pasta.
hope this helps!
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<u>Answer:</u> The instantaneous rate of formation of HBr at 50 s is 
<u>Explanation:</u>
From the graph,
Initial rate of the 
= 1.0 M
Time when the concentration of is 0.5 M (half the concentration ) = 60 sec
For first order reaction:
Calculating rate constant for first order reaction using half life:
.....(1)
= half life period = 60 s
k = rate constant = ?
Putting values in equation 1:
For the given chemical reaction:
Rate of the reaction = ![-\frac{\Delta [Br_2]}{\Delta t}=\frac{1}{2}\frac{\Delta [HBr]}{\Delta t}](https://tex.z-dn.net/?f=-%5Cfrac%7B%5CDelta%20%5BBr_2%5D%7D%7B%5CDelta%20t%7D%3D%5Cfrac%7B1%7D%7B2%7D%5Cfrac%7B%5CDelta%20%5BHBr%5D%7D%7B%5CDelta%20t%7D)
Negative sign represents the disappearance of the reactants
From the above expression:
![k[Br_2]=-\frac{\Delta [Br_2]}{\Delta t}=\frac{1}{2}\frac{\Delta [HBr]}{\Delta t}](https://tex.z-dn.net/?f=k%5BBr_2%5D%3D-%5Cfrac%7B%5CDelta%20%5BBr_2%5D%7D%7B%5CDelta%20t%7D%3D%5Cfrac%7B1%7D%7B2%7D%5Cfrac%7B%5CDelta%20%5BHBr%5D%7D%7B%5CDelta%20t%7D)
At 50 seconds, ![[Br_2]=0.6 M](https://tex.z-dn.net/?f=%5BBr_2%5D%3D0.6%20M)
Plugging values in above expression, we get:
![\frac{1}{2}\frac{\Delta [HBr]}{\Delta t}=0.01155\times 0.6\\\\\frac{\Delta [HBr]}{\Delta t}=2\times 0.01155\times 0.6=0.01386=1.4\times 10^{-2}M/s](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%5Cfrac%7B%5CDelta%20%5BHBr%5D%7D%7B%5CDelta%20t%7D%3D0.01155%5Ctimes%200.6%5C%5C%5C%5C%5Cfrac%7B%5CDelta%20%5BHBr%5D%7D%7B%5CDelta%20t%7D%3D2%5Ctimes%200.01155%5Ctimes%200.6%3D0.01386%3D1.4%5Ctimes%2010%5E%7B-2%7DM%2Fs)
Hence, the instantaneous rate of formation of HBr at 50 s is
The balanced equation for the thermal decomposition of liquid mercury is as follow:
2HgO + heat = 2Hg + O2.
This equation means that, two molecules of solid mercury oxide was heated to give two atoms of liquid mercury and one oxygen molecule.<span />
Answer:
The answer to your question is given below.
Explanation:
1. CH3COOH(aq) + NaHCO3(s) —> CO2(g) + H2O(l) + Na+(aq) + CH3COO-(aq)
The above equation is balanced since the number of atoms of the different elements present on both sides of the equation are equal.
2. CaCl2 + NaHCO3 —> CO2 + CaCO3 + NaCl + H2O
The above equation can be balance as follow:
There are 2 atoms of Cl on the left side and 1 atom on the right side. It can be balance by putting 2 in front of NaCl as shown below:
CaCl2 + NaHCO3 —> CO2 + CaCO3 + 2NaCl + H2O
Now, there are 2 atoms of Na on the right side and 1 atom on the left side. It can be balance by putting 2 in front of NaHCO3 as shown below:
CaCl2 + 2NaHCO3 —> CO2 + CaCO3 + 2NaCl + H2O
Now the equation is balanced.
