Following reaction is involved in present system:
2KMnO4 + 5H2O2 + 3H2SO4 → 2MnSO4 + K2SO4 + 5O2 + 8H2O
From the above balance reaction, it can be seen that 2 moles of KMnO4 is consumed for every 5 moles of H2O2.
Now, percent by mass of hydrogen peroxide in the original solution can be estimated as follows:
percent by mass =
∴percent by mass =
= 4 %
False
if the pH is 8, this is basic because based on the pH scale, any below 7 is acidic, above 7 is basic and at 7 is neutral.
<span>(K⁺¹)2Cr(O⁻²)4
+1*2 +x-2*4=0
2+x-8=0
x=6
Oxidation number of Cr is +6.</span>
The answer is TRUE because in that ecuation there are 6 atoms or moles of mercury in both sides and you also have the required moles of oxygen
Answer:
363.6 K
Explanation:
To solve this problem we will use Charles law equation i.e,
V1/T1 = V2/T2
Given data
V1= 350 mL
T1= 45.0 °C
V2= 400.0 mL
T2=?
First of all we will convert the temperature into kelvin because the kelvin is an absolute scale of temperature.
T1= 45.0+ 273.15 = 318.15 K
Now we will put the values in equation
350 mL / 318 K = 400 mL / V2
V2= 400 mL × 318.15 K / 350 mL
V2= 363.6 K
We can see that by increasing the temperature volume of given gas is also increases. we conclude that volume and temperature are directly proportional to each other. It is also confirmed by the Charles law.
“ The volume of given mass of a gas at a constant pressure is directly proportional to the absolute temperature ”
