Answer:
Chilling the hydrogen peroxide solution
Explanation:
The MnO₂ is acting as a catalyst.
Chilling the hydrogen peroxide solution reduces the average kinetic energy of the H₂O₂ molecules.
Fewer of them will have enough kinetic energy to overcome the activation energy of the reaction. The rate will decrease.
A is wrong. Using a larger amount of solution does not increase the number of H₂O₂ molecules that can reach the surface of the catalyst per second. There is no effect on the rate.
B is wrong. Increasing the mass of the cube increases its surface area. More molecules of H₂O₂ can reach the surface of the catalyst per second. The rate increases.
D is wrong. Smashing the cube into pieces vastly increases the surface area, so the rate increases
Answer:
B)
Explanation:
UV increases earths temp making global warming
Answer:
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Explanation:
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Answer:- Titanium(III)oxide
Explanations:- Titanium is a transition metal and we know that transition metals shows variable oxidation states. Charge for oxygen is -2. While writing the chemical formulas, we use criss cross means the charge of the anion becomes the subscript of the cation. Similarly, the charge of the cation becomes the subscript of the anion.
Here, it is important that we use the simple ratio of the charges for their subscripts. For example if the anion and cation has equal charges then no subscripts are used.
The given chemical formula is . From this formula, the subscript of Ti is 2 which is the charge of oxygen atom. Similarly the subscript of O is 3 which is the charge of titanium atom.
While writing names for the compounds containing transition metals then the charge of the transition metal is indicated by writing roman numeral next to the name of the metal.
When oxygen is bonded to the metal ions then these compounds are named as oxides. As the charge of Ti is +3, the name of the compound is Titanium(III)oxide.