Solar energy will not run out (unless the sun burns out), but the supply of fossil fuels we use is slowly depleting. Burning fossil fuel also releases greenhouse gas into the air, which is bad for the atmosphere.
Answer:
The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.
Carbon is a solid at room temperature.
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Answer:</h2>
Option C) Raw liver produced the most oxygen bubbles, followed by raw potato.
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Explanation:</h2>
- The Hydrogen peroxide is highly unstable compound and gets converted to water and half oxygen.
i.e H₂O₂ → H₂O ₊ 1/2 O₂
- This Half Oxygen molecule produces fizz in the food.
- The enzyme catalase increases the rate of reaction.
i.e 2 H₂O₂ ₊ catalase → 2 H₂O ₊ 2 O₂.
- According to the given data Raw liver produces maximum fizz followed by Raw potato followed by cooked liver then boiled potato.
Result: Raw liver produces maximum fizz followed by raw potato.
Answer:
Oxygen can be made from hydrogen peroxide, which decomposes slowly to form water and oxygen:
hydrogen peroxide → water + oxygen
2H2O2(aq) → 2H2O(l) + O2(g)
The rate of reaction can be increased using a catalyst, manganese(IV) oxide. When manganese(IV) oxide is added to hydrogen peroxide, bubbles of oxygen are given off.
Apparatus arranged to measure the volume of gas in a reaction. Reaction mixture is in a flask and gas travels out through a pipe in the top and down into a trough of water. It then bubbles up through a beehive shelf into an upturned glass jar filled with water. The gas collects at the top of the jar, forcing water out into the trough below.
To make oxygen in the laboratory, hydrogen peroxide is poured into a conical flask containing some manganese(IV) oxide. The gas produced is collected in an upside-down gas jar filled with water. As the oxygen collects in the top of the gas jar, it pushes the water out.
Instead of the gas jar and water bath, a gas syringe could be used to collect the oxygen