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Setler79 [48]
3 years ago
8

If electromagnetic radiation has a frequency of 2.0×1015s−1, what is the radiation’s energy?(1 point)

Chemistry
1 answer:
Alika [10]3 years ago
7 0
  • Frequency=v=2×10^15Hz
  • Energy=E

Using planks quantum theory

\\ \sf\longmapsto E=hv

\\ \sf\longmapsto E=6.626\times 10^{-34}Js\times 2\times 10^{15}s^{-1}

\\ \sf\longmapsto E=13.252\times 10^{-19}J

\\ \sf\longmapsto E=1.3\times 10^{-18}J

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A red giant is a luminous giant star of low or intermediate mass in a late phase of stellar evolution. The outer atmosphere is inflated and tenuous, making the radius large and the surface temperature around 5,000 K or lower.

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Polymers consist of _________ bound monomers or repeating units.
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Hmm, Sounds like the best answer would be Surface Bound Monomers. Hope this was correct :)
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How many liters of CO2 form at STP if 5.0 g of<br> CaCO3 are treated with excess hydrochloric acid?
amid [387]

Answer: STP

CaCO3 = 5 g

Convert gram to mol

100 g of CaCO3   = 1 mol

5 g of  CaCO3 (n)  = 5 g *(1 mol/100 g) = 0.05 mol

Gas law  

PV =nRT

V = nRT/P  

V = (0.05 mol * (0.08206 L atm /K mol) *273 K)/1 atm

V = 1.124 L

Explanation:

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3 years ago
When a teacher dilutes 50 mL of 2.0 M NaOH to 0.50 M, what volume of NaOH results?
JulijaS [17]

Answer:

= 200 mL

Explanation:

Using the dilution formula;

M1V1 = M2V2 ;

Where, M1 is the concentration before dilution, V2 is the volume before dilution, while M2 is the concentration after dilution and V2 is the volume after dilution.

M1 = 2.0 M

V1 = 50 mL

M2 = 0.50 M

V2 = ?

V2 = M1V1/M2

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6 0
3 years ago
Intermolecular forces are the interactions between molecules and are generally weaker than bonds within molecules. Which molecul
telo118 [61]

Answer:

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Explanation:

Intermolecular forces are forces of attraction or repulsion that exist between particles (ions, atoms, or molecules) that are close/in nearby proximity to each other. Usually, intermolecular forces are not as strong as intramolecular forces which create covalent or ionic bonds between the atoms that exist within molecules. Dipole-dipole interactions occur whenever the partial charges that exist within one molecule are attracted to the opposite partial charges that exist within another different molecule that is nearby and similar in composition: the positive end/charges of one molecule are attracted to the negative end/charges of another similar molecule.

An example of molecules that exhibit dipole-dipole interaction is the water (H2O) molecule. Another molecule which exhibits dipole–dipole interaction is the Hydrogen Chloride (HCl) molecule, whereby the positive end of one HCl molecule usually attracts the negative end of another HCl molecule.

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3 years ago
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