Answer:
They frequency = 3.9 * 10^16 Hz
The amount of energy E = 2.58 *10^-17 J
Explanation:
Step 1: Data given
wavelength is 7.67 * 10^-7 cm
Step 2: Calculate the frequency
f = c / λ
⇒ with λ = the wavelength in nm = 7.67 nm
⇒ with c = the speed of light = 3.00 * 10^8 m/s
⇒ f = the frequency = TO BE DETERMINED
f = (3.00 * 10^8 m/s) / 7.67 * 10^-9 m
f = 3.9 * 10 ^16 /s = 3.9 * 10^16 Hz
They frequency is 3.9 * 10^16 Hz
Step 3: Calculate the amount of energy
E = h
*f
⇒ with E = the amount of energy (in joule)
⇒ h = Planck's constant = 6.626 *10^-34 J*s
⇒ with f = the frequency
E = 6.626 *10^-34 J*s * 3.9 * 10^16 Hz
E = 2.58 *10^-17 J
I have no idea honestly I don’t remember I had it and I forgot it
Variance, standard deviation and interquartile range
Answer:
This question appear incomplete
Explanation:
This question appear incomplete because an equation to show the production of sodium chloride from calcium chloride should have been illustrated. However, if the balanced chemical equation showing sodium chloride (NaCl) been a product of a reaction involving calcium chloride (CaCl₂) as a reactant (shown below) is to be used, then we start by writing a complete balanced chemical equation
CaCl₂ + Na₂CO₃ ⇒ CaCO₃ + 2NaCl
From the equation above, it can be deduced that 1 mole of CaCl₂ is required to produce 2 moles of NaCl, thus how many moles of CaCl₂ will be required to produce 6.5 moles of NaCl.
1 mole of CaCl₂ = 2 moles of NaCl
? moles of CaCl₂ = 6.5 moles of NaCl
cross multiply
? moles of CaCl₂ = 6.5 × 1/2
? moles of CaCl₂ = 3.25 moles of CaCl₂
3.25 moles of CaCl₂ will be needed to produce 6.5 moles of NaCl
Explanation:
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