Answer:
9.0 moles Ca(NO₃)₂
Explanation:
from definition of Molarity = moles of solute / volume of solution in liters
=> moles = Molarity x Volume(L) = 6.00 molar x 1.5 liters = 9.0 moles Ca(NO₃)₂
Answer: A, parrots eat seeds, fruit, and nuts, while hawks eat meat.
Explanation:
This option is more onto the behavioral and what the parrots did, while the other options were more on the parrots physical attributions.
<em>I hope this helped! :)</em>
Answer:
1) sunlight
2) radiation
3) radiant Energy
4) heat
5) temperature
Explanation:
1) Solar energy is derived from the sunlight.
2) Now, solar energy gets to the Earth's atmosphere by electromagnetic radiation which warms the Earth's surface.
3) Sunlight is a form of radiant energy because the light from the sun is transmitted by radiation to the earth.
4) When sunlight reaches the earth it is converted to heat energy.
5) Due to the heat from the sun, it will increase the Temperature of objects.
Answer:
the wavelength, in nm, of the photon is 487.5 nm
Explanation:
Given:
n = 4 (excited)
n = 2 (relaxes)
Question: Calculate the wavelength, in nm, λ = ?
First, it is important to calculate the energy of the electron when it excited and then when it relaxes.
(excited)
(relaxes)
The change of energy
ΔE = E₁ - E₂=-0.85 - (-3.4) = 2.55 eV = 4.08x10⁻¹⁹J
For a photon, the wavelength emitted
Here
h = Planck's constant = 6.63x10⁻³⁴J s
c = speed of light = 3x10⁸m/s
Substituting values:
The resulting pressure is 3.093 atm
<u><em>calculation</em></u>
The resulting pressure is calculated using the combined gas equation
That is P₁V₁/T₁ =P₂V₂/T₂ where,
P₁=0.956 atm
V₁=4.95 L
T₁=22.8 c in to kelvin= 22.8 +273 =295.8 k
P₂=? atm
V₂=1.75 L
T₂=65.3 c into kelvin = 65.3 +273 =338.3 K
make P₂ the subject of the formula by multiplying both side of the formula by T₂/V₂
P₂ =T₂P₁V₁ / V₂T₁
P₂ = [(338.3 k x 0.956 atm x 4.95 L) / ( 1.75 L x 295.8 K)] =3.093 atm