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MaRussiya [10]
4 years ago
15

The energy of a photon is ________ proportional to its wavelength. The energy of a photon is ________ proportional to its freque

ncy.
Chemistry
1 answer:
topjm [15]4 years ago
4 0

Answer: Inversely  ,   Directly

Explanation:

The energy of a photon is inversely proportional to its wavelength and directly proportional to its frequency.

As can be seen from this equation;

E = hv  = h c / ∧

Where E = Energy of a photon

           v = Frequency

           h = Planck Constant

           c = speed of light

           ∧  = Wave length

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Calcium hydride reacts with water to form hydrogen gas and calcium hydroxide. How many grams of calcium hydride are needed to ge
4vir4ik [10]

The Equation is CaH2(s)+2H2O(l)-->Ca(OH)2(aq)+2H2(g)

so,

moles of H2 generated = PV / RT

R = 62.363 L Torr K−1 mol−1

number of moles = 814 * 53.5 / 62.363 * 293

= 2.38 moles

looking at the equation these came from 2.38 /2 moles of CaH2 or 1.19 moles

Molar mass of CaH2 is 42.0943 g/mol

so mass of CaH2 = 1.19 X 42.1 = 50.01g

3 0
3 years ago
I need help with organic chemistry!!!
nadya68 [22]

Answer:

CHO2- ion

Explanation:

We have the lewis structure of a formate-ion here

This is CHO2-.

The carbon atom is the central atom in the structure. It's the least electronegative atom (C). Carbon has 4 valence electrons. Oxygen has 6 valence electrons.

The carbon will bind with 1 hydrogen atom, this will form 1 single bond, because hydrogen has 1 valence electron.

The carbon will bind with oxygen via a double bond.

Since carbon has only 4 valence electrons, it can only form 1 bond with the other oxygen atom.

There will formed 1 double bond between C and O and 1 single bond between C and O resulting in a negative charged O-atom.

This means there are two resonance structures. for the CHO2-  ion

7 0
3 years ago
What is located at the singularity of a black hole?
charle [14.2K]
The entire mass of a black hole
5 0
3 years ago
Which of the following is an example of potential energy?
maxonik [38]

Answer: the person standing up

Explanation:

the person has the potential to fall or move from position

6 0
4 years ago
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Why do you think the gesture and gaze features of the Ottonian manuscripts are so important? a. They demonstrate the emotion. b.
Llana [10]

Answer:A. They demonstrated emotions

Explanation: Ottonian manuscript are illuminated manuscripts,metal works which represented religious texts and believes. This art works were made in Germany during the Renaissance period lasting between the tenth and eleventh century. The Ottonian manuscripts and art works were produced by monks and nuns in the monasteries during those periods. The people of the Ottonian Kingdom loved mathematics and it was reflected in the art works which they produced during those times.

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3 years ago
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