Answer:
Increases, remain constant
Explanation:
In the light spectrum, the photons with a higher frequency (hence smaller wavelengths) have higher energy. The lower the energy the lower the frequency and longer the wavelengths. The intensity of light does not change the energy levels of these photons. The higher the intensity the higher the density of the photoelectrons.
Answer:
54.0 g.
Explanation:
- From the given data and the balanced reaction:
<em>2H₂ + O₂ → 2H₂O.</em>
<em></em>
When 3.00 moles of hydrogen molecules and 1.50 moles of oxygen molecules react, they form 3.00 moles of water according to the balanced reaction.
<em>∴ The no. of grams in 3.0 moles of water = no. of moles x molar mass </em>= (3.0 mol)(18.0 g/mol) = <em>54.0 g.</em>
Answer: I learned about this in school
Explanation:
Its very easy
a. cesium and sulfur would be an ionic bond (metal + non-metal)
b. chlorine and bromine would be a covalent bond (non-metal+ non-metal)
c. magnesium and fluorine would be ionic again (metal + non-metal)
d. silver and mercury would be a metallic bond I'm pretty sure at least (metal+metal)
Answer:
2.33*10^-15 s
Explanation:
We need to estimate the period of oscillation of an electron that bounced up/down due to the effects of a passing packet of red light. The period of oscillation is the wavelength of the red light divided by the speed of the red light. We know that:
V = f*λ
where V = speed of the red light = 3*10^8 m/s
f = frequency = 1/T where T is the period of oscillation in seconds (s)
λ = the wavelength of the red light = 0.7*10^-6 m
Thus:
V = λ/T
T = λ/V = (0.7*10^-6)/(3*10^8) = 2.33*10^-15 s
