Answer:
A lot of people rejected it outright. Christians were persecuted and killed for their beliefs, and there were no cars, etc for easy transportation. Most people had to walk everywhere since horses and the like were only for the rich and royal. Hope this helps, please give me brainliest :)
Explanation:
Answer:
Compressibility means: being able to basically squish something easier. Like water, water can be reduced in volume or size under pressure When that water expands, it turns into a gas.
Explanation:
Mass of MnO2 = 25 g
The reaction would be 3MnO2 + 4Al --> 3Mn(s) + 2Al2O3
Molar mass of Al = 26.982 g/mol
Molar mass of MnO2 = 54.938 + 2(15.999) = 86.936 g/mol
Calculating the moles = 25 / 86.936 = 0.2876 mol.
Mole ratio MnO2 and Al considering the equation = 3 mol of MnO : 4 mol of Al
Calculating the moles of Al = 0.2876 mol MnO2 x (4 mol of Al / 3 mol of MnO)
Number of moles of Al = 0.3834
Getting the mass in grams as asked = 0.3834 mol x 26.982 g/mol = 10.34 grams.
Answer:
Cation present- Cr^3+
Cations absent- Al^3+,Fe^3+ and Ni^2+
Explanation:
The cations in group III are; Cr^3+,Al^3+,Fe^3+ and Ni^2+
The first step in the analysis of group III cations is the addition of sodium hypochlorite and sodium hydroxide. Chromium reacts as follows;
2Cr^3+(aq) + 3OCl^-(aq) + 10OH^-(aq) ---------> 2CrO4^2-(aq) + 3Cl^-(aq) + 5H2O(l)
In alkaline solution, Aluminum is separated from Chromium by precipitation. The yellow solution formed is unaffected by treatment with ammonia. However, in acid medium, a blue solution is formed which confirms the presence of Chromium III.
Molarity or M =. Moles of solute/ liters of solvent. So. 5.0/2.0=2.5. 2.5 m is your answer