Total density of filled ball with oxygen gas:
The relationship between mass and volume can be easily determined using density; for example, the mass of a body is equal to its volume multiplied by the density (M = Vd), whereas the volume is equal to the mass divided by the density (V = M/d). The ball filled with hydrogen will float in the air because total density of filled ball is lessor than the density of an air. Density of the evacuated ball D = 0.214 g/L
Density of oxygen gas =
Mass of the oxygen gas :
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Answer:
- CFJA17
- THZ561
- GJA561
- GH68
- N461
- DG56
- BSJ57
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Two electrons
Explanation:
The number of electrons needed to form one single bond is two electrons. A bond is formed when two atoms comes together and exchange their valence electron. Some atoms prefers to share their valence electrons and are called covalent compounds.
- To form a single bond, the two atoms must donate an electron each.
- Double bond is formed by four electrons
- Triple bond is formed by six electrons in the vicinity of the atoms.
- The region where the bond forms is rich in a lot of mobile electrons
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D. Elements
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Your answer is choice C. That is solid sodium chloride never dissolves to form sodium ions and chloride ions.
Going further to explain, have a look at the question again, we are told that James Proton prepares a saturated solution of sodium chloride in a beaker by adding solid sodium chloride and stirring.
Then when James finishes, crystals of sodium chloride are observed at the bottom of the beaker.
This implies that no more salt was dissolving since the saturation point was reached.
Again suppose he increased the temperature of the reaction, more salts could have dissolved.