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Vikentia [17]
2 years ago
8

10) What is the energy of a photon whose frequency is 2.7 X 1014 Hz?

Chemistry
1 answer:
rjkz [21]2 years ago
4 0

Answer: c

Explanation:

E=hf

h = constant

f = frequency

E=(6.626x10^-^3^4J/s)(2.7x10^1^4Hz)\\E=1.78902x 10^-^1^9

moving the point 1 number to the right, and rounding up, leaves us with;

E=17.9x 10^-^2^0

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What is the net ionic equation of the reaction of MgSO4 with Pb(NO3)2?
NemiM [27]

Hey there!:

Write the molecular equation for the reaction of MgSO4 with Pb(NO3)2 :

MgSO4(aq) + Pb(NO3)2(aq) ---> Mg(NO3)2(aq) + PbSO4(s)

Write the total ionic equation  for the reaction :

Mg²⁺ (aq) + SO₄⁻² (aq) + Pb²⁺ (aq) + 2 NO₃⁻¹ (aq) + PbSO₄(s)

Therefore:

Cancel the spectator ions on both sides:

Pb²⁺ (aq) + SO₄⁻² (aq) ---> PbSO4(s)


Hope that helps!

4 0
3 years ago
When you take 10 grams of salt, and dissolve it in 25 grams of hot water what is the solubility
AURORKA [14]

Answer:

When salt is mixed with water, the salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules. ... Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together.

Explanation:

4 0
2 years ago
PLZ HELP OR WILL FAIL!!
lianna [129]
Hey there!

Label A: Sublimation
Label B: Condensation
Label C: Melting

Remember sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. Condensation is the conversion of a vapor or gas to a liquid. Melting is becoming liquefied by heat.

Hope this helps!
5 0
3 years ago
Select the correct answer.
Elina [12.6K]

Answer:

CU

Explanation:

Cu is the correct answer if I'm correct

4 0
2 years ago
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Electronegativity
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