Answer:
7 moles
Explanation:
Given data:
Moles of hydrogen = 7 mol
Moles of water formed = ?
Solution:
Chemical equation:
2H₂ + O₂ → 2H₂O
Now we will compare the moles of water with hydrogen from balance chemical equation:
H₂ : H₂O
2 : 2
7 : 7
So in the presence of excess oxygen and 7 moles of hydrogen seven number of moles of water produced.
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Answer:
3g/cm cube
Explanation:
The most accurate way to calculate the density of any solid, liquid or gas is to divide its mass in kilograms by its volume (length × width × height) in cubic metres. The unit for density is kg/m 3. The density of water is approximately 1000 kg/m 3 and the density of air is approximately 1.2 kg/m 3.
15 divide by 5 = 3
We know that the particles in a matter have energy. They have kinetic energy, potential energy, chemical energy, electrical energy etc.
When we give heat to a matter it gains energy and there is an increase in its internal energy. Or we can say that particles in a matter have more energy at higher temperature than particles in a matter at low temperature
As ice is formed below zero degree celsius so the particles in ice must have lesser energy than water at higher temperature.
Thus true statement will be
The particles in boiling water have more energy than the particles in ice water do.
