Answer:
<em>Wave speed is the distance a wave travels in a given amount of time, such as the number of meters it travels per second. Wave speed is related to wavelength and wave frequency by the equation: Speed = Wavelength x Frequency. This equation can be used to calculate wave speed when wavelength and frequency are known</em>
The forward reaction is:
2H₂(g) + O₂(g) → 2H₂O(g); ΔH = -484 kJ
The forward reaction releases 484 kilojoules of energy to form water. As per the reaction equation, in order to cause two moles of water to decompose and make the reaction proceed backwards, 484 kilojoules of energy must be added to water.
Assuming total mass to be 100 g
Mass of C = 52.93 g
=> Moles of C = 
Mass of H = 5.92 g
=> Moles of H=
Mass of N = 41.15 g
=>Moles of N=
Simplest mole ratio of the atoms in the compound:
Empirical formula mass=
Multiple n = 
Molecular formula= 
The water is more dense than the needle so it can withstand the weight. It is the contraction of the water falling faster than the others forming a drop pattern or the water getting smaller so the top looked smaller.
Answer:
At constant Pressure V /T = constant. sooooo
49 / 79 = 24.5 / T
T = 24.5 × 79/49 = 39.5°C
