Answer:
The vinegar is highly acidic by 100 times than yogurt.
Explanation:
∵ pH = -log[H⁺]
- The concentration of H⁺ in yogurt:
∵ pH = -log[H⁺]
∴ 5 = -log[H⁺]
∴ [H⁺] = 1.0 x 10⁻⁵ M.
- The concentration of H⁺ in vinegar:
∵ pH = -log[H⁺]
∴ 3 = -log[H⁺]
∴ [H⁺] = 1.0 x 10⁻³ M.
the ratio of H⁺ in vinegar to that in yogurt = 1.0 x 10⁻³ M / 1.0 x 10⁻⁵ M = 100.0.
<em>∴ The vinegar is highly acidic by 100 times than yogurt.</em>
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Number of photons can be calculated by dividing the needed energy by the energy per photon.
The minimum energy needed is given as 2 x 10^-17 joules
Energy per photon = hc / lambda where h is planck's constant, c is the speed of light and lambda is the wavelength
Energy per photon = (<span>6.626 x 10^-34 x 3 x 10^8) / (475 x 10^-9)
= 4.18 x 10^-19 J
number of photons = (2 x 10^-17) / (4.18 x 10^-19)
= 47.79 photons which is approximately 48 photons</span>
Answer:
d
Explanation:
Hydration is a type of chemical weathering where water reacts chemically with the rock, modifying its chemical structure. One example of mineral hydration is when H2O (water) is added to CaSO4 (calcium sulfate) to create CaSO4+2H2O (calcium sulfate dihydrate).
An electron will excite when it gets extra energy.
Explanation:
- Matters are made up of atoms and inside the atom, there is a nucleus and electrons. Nucleus has a positive charge and electron has a negative charge. The nucleus is situating at the centre of the atom and the electrons are present on the shells. These electrons having different energy levels but all the electrons are orbit the nucleus in the atom.
- Whenever an electron occupying an energy state which is larger than its ground state, then it is an excited state. Electrons will get excited when they gain some extra energy. The electron will get extra energy when they collide with the nearby particle or atoms, absorbing protons and absorbing packets of light.
