What is the energy of a photon that emits a light of frequency 6.42 x 1014 Hz?

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Answer: the answer for this question is in the pic

Explanation:

Answer:

30 positive charged protons

Answer:

9 atoms

Explanation:

Ca=1

Cl=2

O=6

add them all

answer

cl atom is 2

ca atom is 1

o atom is 6

Answer:

D

Explanation:

Al is a reducing agent because it removes Oxygen from another compound

Mno2 is an oxidizing agent

Answer:

0.50 mols Ag

Explanation:

Given the data, we have:

mass= 54g

molar mass of Silver (Ag): 107.8 g/mol

We want moles, we can convert grams > moles using the molar mass as a "bridge" between the 2.

[tex]54g * \frac{1 mol}{107.8 g}= 0.50 mols Ag[/tex]

Keeping an eye on the units, we'll see 54g get cancelled out by 107.8 g/mol and we'll be left with moles of Silver.

Answer:

Electromagnetic waves are typically described by any of the following three physical properties: frequency (f), wavelength (λ), or intensity (I). Light quanta are typically described by frequency (f), wavelength (λ), or photon energy (E). The spectrum can be ordered according to frequency or wavelength.

Answer:

[tex]V_2=0.5L[/tex]

Explanation:

From the question we are told that:

initial Volume [tex]V_1=2.00L[/tex]

initial Pressure [tex]P_1=1 atm[/tex]

Final  Pressure [tex]P_2=6atm[/tex]

Generally the equation for Final Volume V_2 is mathematically given by

Since Boyle's law states

 [tex]P_1V_1=P_2V_2[/tex]

 [tex]V_2=\frac{P_1V_1}{P_2}[/tex]

 [tex]V_2=\frac{2*1}{6}[/tex]

 [tex]V_2=0.5L[/tex]

Answer:

a. Same group, different period

b. Different group, same period

c. Different group, different period

d. Same group, different period

Answer:

[tex]Kc=\frac{(Cu2)(Ag)^2}{(cu)(Ag)^2}[/tex]

Explanation:

because it is products / reactants  

Hope this helps:)

Answer:

Erlenmeyer flasks have a narrow neck over a conical base, while beakers are basically large open-mouthed glass jars with a lip and spout for pouring. Graduated cylinders are tall cylinders with a spout to pour liquids; they have hash marks on the side to measure the volume of their contents.

Explanation:

hope it helps you alot

Answer:

6x

Explanation:

Answer:

Δ

H

=

−

389 kJ

Answer: Nuclear fusion

Explanation:

The process that produces the energy that is used in photosynthesis is nuclear fusion. option A is correct.

Photosynthesis is the process by which light energy is converted into chemical energy in the form of sugars. This chemical energy is produced as a result of nuclear fusion reaction .

Photosynthesis takes place in chloroplasts of plants, which are found in the mesophyll of  leaves. Inside the chloroplast, is the thylakoids, where the chlorophyll absorbs the various hues of light and nuclear fusion reaction takes place  to create energy .

Using light energy, oxygen is produced as a byproduct while carbon dioxide and water are converted to glucose .

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Answer:

To draw a Lewis structure for a covalent compound, begin by calculating A, the available electrons, and N, the needed electrons.

What is N for silicon tetrachloride, SiCl4?

Explanation:

A covalent compound is formed by the mutual sharing of electrons between two atoms.

According to Lewis octet theory, every atom wants to attain eight electrons around it.

For the given molecule SiCl4

Silicon has four valence electrons.

To attain the nearest inert gas configuration it requires four more electrons.

Each chlorine atom shares an electron and thus silicon attains eight electrons in its valence shell.

The Chlorine atom has seven valence electrons.

To get eight electrons in its valence shell it needs one more electron.

That is shared by the silicon atom.

Thus both Si and Cl attain eight valence electrons by sharing electrons and for the covalent bond.

N value for Si is --- 4.

A the available electrons for Si is ---- 4.

The available electrons for Si 4 and the needed electrons are also 4. A covalent compound is formed by the equal sharing of electrons between two atoms.  

A covalent compound is formed by the equal sharing of electrons between two atoms.  

According to Lewis octet theory, every atom wants to attain eight electrons in the shell.  

For the given molecule [tex]\bold {SiCl_4}[/tex]  

Thus both Si and Cl attain eight valence electrons by sharing electrons and for the covalent bond.  

Therefore,  the available electrons for Si 4 and the needed electrons are also 4.

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Answer:

Carbon dioxide ---> CO₂

Water ----> H₂O

Carbon ---> C

Oxygen ----> O₂

Hydrogen ----> H₂

Explanation:

The molecular formula of an element or compound is a formula which represents the composition of a molecule of that element or compound. It consists of the formula representing the atoms present as well as the number of atoms of each element innthe compound written as subscript innthe formula of the element or compound.

The molecular formula of the given elements and compounds are given below:

Carbon dioxide ---> CO₂

Water ----> H₂O

Carbon ---> C

Oxygen ----> O₂

Hydrogen ----> H₂

The molecular formula of carbon dioxide shows that in a molecule of carbon dioxide, there are two atoms of oxygen and one atom of carbon present in a molecule of carbon dioxide.

The molecular formula of water shows that are two atoms of hydrogen and one atom of oxygen present in a molecule of water.

The molecular formula of carbon shows that there are one carbon atoms in a molecule of carbon.

The molecular formula of oxygen shows that there are two oxygen atoms in a molecule of oxygen gas.

The molecular formula of hydrogen shows that there are two molecules of hydrogen in a molecule of hydrogen gas.

Answer:

For a: The given salt is acidic in nature.

For b: The given salt is neutral in nature.

For c: The given salt is neutral in nature.

Explanation:

Salts are formed by the combination of an acid and a base. There are 3 types of salt:

For the given options:

(a): [tex]NaHSO_4[/tex]

This salt is formed by the combination of sodium hydroxide (strong base)  and the partial dissociation of sulfuric acid (strong acid). It also has a replaceable hydrogen ion which can be produced when dissolved in water. Thus, the given salt is acidic in nature.

(b): [tex]Na_2SO_4[/tex]

This salt is formed by the combination of sodium hydroxide (strong base)  and sulfuric acid (strong acid).

Thus, the given salt is neutral in nature.

(c): [tex]NH_4CN[/tex]

This salt is formed by the combination of ammonium hydroxide (weak base)  and hydrocyanic acid (weak acid).

Thus, the given salt is neutral in nature.

Answer:

B. 96.12 g

Explanation:

To solve this question we must convert each reactant to moles. Using the balanced equation we can find limiting reactant. With moles of limiting reactant we can find the moles of methanol and its mass:

Moles CO -Molar mass: 28.01g/mol-

140.1g CO * (1mol / 28.01g) = 5.0 moles CO

Moles H2 -Molar mass: 2.01g/mol-

12.12g * (1mol / 2.01g) = 6.03 moles H2

For a complete reaction of 5.0 moles of CO are required:

5.0moles CO * (2mol H2 / 1mol CO) = 10.0 moles of H2 are required

As there are just 6.03 moles, H2 is limiting reactant.

The moles of methanol produced are:

6.03 moles H2 * (1mol CH3OH / 2mol H2) = 3.015 moles CH2OH

Mass CH3OH -Molar mass32.04g/mol-:

3.015 moles CH2OH * (32.04g/mol) =

96.6g CH3OH ≈ B. 96.12 g

Answer:

D. Body of salt water that is connected to the ocean

Explanation:

An ocean is a body of salt water which covers approximately 70% of the Earth's surface. About 97% of the Earth's water is comprised of ocean and as such it is the most prominent and defined feature of the Earth. There are basically four (4) categories of an oceanic basin and these are;

1. The Pacific ocean.

2. The Artic ocean.

3. The Atlantic ocean.

4. The Indian ocean.

A sea is usually defined as a body of salt water that is connected to the ocean and are surrounded (enclosed) by land partially.

Basically, a sea is formed where a land and an ocean meet and as a result, an ocean is usually bigger than a sea.

Some examples of seas around the world are Red sea, Mediterranean sea, Sargasso sea, Caribbean sea, Baltic sea, Caspian sea, Chuckchi sea, etc.

Answer:

Yes The Anwer is D Hope This Help:)

Answer:

According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs. Hence, the correct statement is arrhenius acid produces hydrogen ions in solution.

Answer:

It has a lower density in its solild stae than it does in its liquid state.

Explanation:

Ice floats, allowing life underneath to leave despite the top freezing.

The statement that describes a unique property of water that helps sustain marine life is that has a lower density in its solid state than it does in its liquid state.

Water is a unique molecule that possesses unique properties as follows:

These unique characteristics of water helps aquatic organisms sustain life in a marine environment.

Therefore, statement that describes a unique property of water that helps sustain marine life is that has a lower density in its solid state than it does in its liquid state.

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Explanation:

hope the picture above helps u to understand:)

Answer:

True!

Explanation:

Not only products cause pollution, but the smoke from factories, the gas from our cars. Hope this is helpful! ^^

Answer:

An atom bonds to have eight valence electrons to become stable. ... The third shell would be empty so that the eight electrons in the second level would be outermost after the atom loses one electron.

Explanation:

Answer:

A

Explanation:

In the Brønsted-Lowry definition of acids and bases, a conjugate acid-base pair consists of two substances that differ only by the presence of a proton (H⁺).

Answer:

ver explicacion

Explanation:

El elemento que tiene el número atómico 56 en la tabla periódica del bario. El bario es un elemento del grupo dos.

Se combina con el cloro para formar cloruro de bario. que tiene la fórmula BaCl2 de acuerdo con la valencia de ambos elementos.

El cloruro de bario es un compuesto iónico.

Answer: The concentration of the acid Vincent produced is 0.083 M.

Explanation:

Given: Mass = 6.5 g

Volume = 600.0 mL (1 mL = 0.001 L) = 0.6 L

Moles is the mass of substance divided by its molar mass. So, moles of bromic acid (molar mass = 128.91 g/mol) are calculated as follows.

[tex]Moles = \frac{mass}{molar mass}\\= \frac{6.5 g}{128.91 g/mol}\\= 0.05 mol[/tex]

Molarity is the number of moles of a substance present in liter of a solution.

Therefore, molarity (concentration) of the given solution is calculated as follows.

[tex]Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.05 mol}{0.6 L}\\= 0.083 M[/tex]

Thus, we can conclude that the concentration of the acid Vincent produced is 0.083 M.

Answer:

Since the molar mass of Calcium is 40.08 g and the molar mass of Chlorine is 35.45, it would be 40.08g+35.45g+35.45g (with 2 Chlorines according to the subscript.) That leaves you with 110.98 g.

Explanation:

Hope it helps you

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