The wavelength=9.29 x 10⁵ m
Further explanationRadiation energy is absorbed by photons
The energy in one photon can be formulated as
[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]
Where
h = Planck's constant (6,626.10⁻³⁴ Js)
f = Frequency of electromagnetic waves
f = c / λ
c = speed of light
= 3.10⁸
λ = wavelength
a frequency of 3.23 x 10¹⁴/s
the wavelength :
[tex]\tt \lambda=\dfrac{c}{f}=\dfrac{3\times 10^8}{3.23\times 10^{14}}=9.29\times 10^5~m[/tex]
An unknown liquid fills a 200 ml cylinder and has a mass of 150g. Calculate the density./
Answer:
0.75 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question we have
[tex]density = \frac{150}{200} = \frac{3}{4} \\ [/tex]
We have the final answer as
0.75 g/mLHope this helps you
How many formula units is 213 g of PbCl2?
a
1.28 x 1026
b
4.61 x 1023
G
7.86 x 1023
d.
15.72 1024
Answer:
4.61 x 10^23
Explanation: Convert 213g of PbCl2 to mol, which is 0.7658950184462004, multiply 0.765 with 6.022 x 10^23.
1 mole is equal to 6.023 × 10 ²³ molecules. 4.61 x 10^23 formula units is 213 g of PbCl2.
What do you mean by mole ?The term mole is defined as the amount of substance of a system which contains as many elementary entities.
One mole of any substance is equal to 6.023 × 10²³ units of that substance such as atoms, molecules, or ions. The number 6.023 × 10²³ is called as Avogadro's number or Avogadro's constant.
The mole concept can be used to convert between mass and number of particles.
Convert 213g of PbCl2 to mol,
1 mole is equal to the 6.023 × 10 ²³ molecules
1 mole of PbCl2 is equal to the 6.023 × 10 ²³ molecules
which is 0.7658950184462004, multiply 0.765 with 6.022 x 10^23.
= 0.765 × 6.022 x 10^23
= 4.61 x 10^23
Thus, 4.61 x 10^23 formula units is 213 g of PbCl2.
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What is the chemical symbol for salt?
Answer: chemical formula of table salt is NaCl
Explanation:
Which of the following statements is not a main point of Dalton's atomic theory?
of
Select one:
a. Atoms are indestructible.
b. Atoms are made up of smaller particles.
C. All matter is made up of atoms.
d. All atoms of one element are exactly alike, but they are different from atoms of other elements.
Answer:
B is not main point Dalton addressed
Gravity is a force that every mass exerts on every other mass. When you jump up in the air, not only does the Earth
exert a gravitational force on you, but you also exert a gravitational force on the Earth. You, of course, fall back down to
the Earth. Which of the following explains why the Earth is not moving toward you when you jump up in the air?
A. Earth exerts a gravitational force on itself.
B. You don't weigh enough to affect Earth's surface.
C. Your mass is very small compared to Earth's mass.
D. Earth's fixed orbit around the Sun keeps it from moving
Answer:
Brainliest A and I want brainliest please
Explanation:
That pull is gravity at work. Every object in the universe that has mass exerts a gravitational pull, or force, on every other mass. The size of the pull depends on the masses of the objects. You exert a gravitational force on the people around you, but the Gravity or gravitational forces are forces of attraction. We're not talking about finding someone really cute and adorable. It's like the Earth pulling on you and keeping you on the ground. That pull is gravity at work.
Every object in the universe that has mass exerts a gravitational pull, or force, on every other mass. The size of the pull depends on the masses of the objects. You exert a gravitational force on the people around you, but that force isn't very strong, since people aren't very massive. When you look at really large masses, like the Earth and Moon, the gravitational pull becomes very impressive. The gravitational force between the Earth and the molecules of gas in the atmosphere is strong enough to hold the atmosphere close to our surface. Smaller planets, that have less mass, may not be able to hold an atmosphere.at force isn't very strong, since people aren't very massive.
Obviously, gravity is very important on Earth. The Sun's gravitational pull keeps our planet orbiting the Sun. The motion of the Moon is affected by the gravity of the Sun AND the Earth. The Moon's gravity pulls on the Earth and makes the tides rise and fall every day. As the Moon passes over the ocean, there is a swell in the sea level. As the Earth rotates, the Moon passes over new parts of the Earth, causing the swell to move also. The tides are independent of the phase of the moon. The moon has the same amount of pull whether there is a full or new moon. It would still be in the same basic place.
How many moles is 55 g of NaCl?
Help please with steps :(
Answer:
0.94 mol NaCl
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
55g NaCl
Step 2: Identify Conversions
Molar Mass of Na - 22.99 g/mol
Molar mass of Cl - 35.45 g/mol
Molar Mass of NaCl - 22.99 + 35.45 = 58.44 g/mol
Step 3: Covert
[tex]55 \ g \ NaCl(\frac{1 \ mol \ NaCl}{58.44 \ g \ NaCl} )[/tex] = 0.941136 mol NaCl
Step 4: Check
We are given 2 sig figs. Follow sig fig rules and round.
0.941136 mol NaCl ≈ 0.94 mol NaCl
In 55 grams of sodium chloride (NaCl), 0.94 moles of NaCl is present.
What are moles?Number of moles of any substance is defined as:
n = W / M
Where, W = given mass or weight
M = molar mass
In the question given weight of NaCl is 55 g.
And molar mass of NaCl is 58.44 g/mol
Now we put all these values in the above equation, we will get:
n = 55 / 58.44 = 0.94 mol
Hence, 0.94 mole of NaCl is present in 55g of NaCl.
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what is the product of the combustion of hydrogen
Answer:
Hydrogen burns in oxygen to form water. The flame is almost colourless. Mixtures of hydrogen and oxygen (or hydrogen and air) can be explosive when the two gases are present in a particular ratio, so hydrogen must be handled very carefully.
30 points!!
What is the mass of a 10 gram sample of potassium-42 that will remain unchanged after 124 hours?
Explanation:
hope this helps you
Mark my answer as brainalist
2. Describe how baking cake is an example of irriversible change.
Answer:
Baking a cake is a chemical and irreversible change, because once the raw materials are chemically converted during baking, one cannot recover the raw materials from the cake
Which of the following gives a plant the carbon it needs to make glucose?
Water
Light Energy
Carbon Dioxide
Ouction 2
Answer:
light babsbabsbab
Explanation:
abbdbabsbabba
what happens when the temperature of a solid reaches its melting point
Answer:
it melts
Explanation:
HELPPPPPP
In a water molecule, oxygen attracts electrons more strongly than the hydrogens because an oxygen atom has ...?
- a higher EN
- lower EN
- higher ionization energy
Answer:
a higher electronegativity
Explanation:
In fact, in chemistry Nitrogen, Oxygen and Fluorine are the most electronegative element
why is tate langdon from ahs so hot
Answer:
hes actually kinda hot tho
Explanation:
Answer:
he's a literal daddy
Explanation:
his parents
how did the masses of objects affect the strength of gravity
Answer:
the strength of gravitational force between two objects depends on two factors,mass and distance. the force of gravity the masses exert on each other. if one of the masses is doubled, the Force of gravity between the object is doubled. increases the force of gravity decreases.
5. The formula unit of calcium sulfide is :
(1 Point)
OCa, S,
o Ca₂S
O Ca23
O Cas
3:Both plants and animals get the energy they need to grow by breaking down food
true or false?
3a:why did you selected your response?
False
Plants do not break down their own food. They do not break down glucose. Animals however, need to ingest and break down the food in order to obtain energy.
Answer:
False
Animals get their energy be breaking down food but plants get their energy from sun and make food by the process of photosynthesis.
A combination of salt and sugar grains is best classified as a mixture because...
A the grains taste different from one another.
B both salt and sugar grains are in the same state of matter.
C no new chemical bonds are formed between the salt and sugar grains.
D a new product is formed when the salt and sugar grains are combined
Answer:
C
Explanation:
Thats just the answer
A combination of salt and sugar is classified as mixture because no new chemical bonds are formed between salt and sugar grains.
What are the properties of mixtures?Mixture is when two or more substances are present without undergoing any chemical change.As there is no chemical change taking place , substances do not loose their properties .Mixtures result as of blending,mixing.
Components of mixtures retain their original properties.Separation of each of the components can be done easily.The proportion of the components can be varied. There is no chemical force acting between components of mixtures.The proportions differ in an indefinite manner.
During formation of mixtures, there is no change in energy.Boiling and melting points depend on constituent elements present in the mixture.There are two types of mixture:
1) Heterogenous mixture
2) Homogenous mixture
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Forces and Motion:Question 1
A rider on a bicycle travels north for 1.5 hours and covers a distance of 18
kilometers. What is the velocity of the bicycle?
Answer:
Velocity = 12 km/h
Explanation:
Velocity can be defined as the division between distance traveled and the time it took for that distance to be traveled:
Velocity = Distance / TimeWith the above information in mind, we can calculate the velocity of the bicycle:
Velocity = 18 km / 1.5 hVelocity = 12 km/hThus the velocity of the bicycle is 12 kilometers per hour.
Which elements are necessary to accomplish work?
force, cause, displacement
force, cause, energy
force, energy, displacement
energy, cause, displacement
The answer to this question is A "force, cause, displacement"
Hope that helps!
What forces hold molecular solids together?
A. Intermolecular forces
B. Forces from ionic bonds
C. Forces from covalent bonds
D. Forces from metallic bonds
Answer:
intermolecular forces
Answer:
A. Intermolecular forces
When thermal
energy of a system increases, the particles move ____.The motion of the particles can move parts of the system. When something causes an object to ___ it has done work on it.
a. slower;move
b. faster;move
c.faster;heat up
d.slower; heat up
Air is made up of different gases such as oxygen nitrogen and carbon dioxide
What are atoms? What do we use it for
Answer:
atoms are everything and they are use to create anything and everything
Answer:
Atoms are composed of subatomic particles that are the building blocks of life
A force that pulls all objects that have mass toward one another is called
I think it is newtons but not that sure
Answer:
Gravity
Explanation:
I remembered from quizlet.
Lucy knew that a tea cup of water has a boiling point of 100˚ Celsius. She currently has a 5 liter soup pan filled with water. At what temperature will the 2.5 two liters of water boil? A. 500˚ Celsius B. 0˚ Celsius C. 105˚ Celsius D. 100˚ Celsius
What is the tendency for an atom to attract electrons when chemically
bonded to another atom?
Answer:
Electronegativity
Explanation:
Answer:
Electronegativity
Explanation:
Edge 2021
A tank of nitrogen has a pressure of 2.5 atm and is combined with a tank of Ar with at final pressure of 3099 mmHg. What is the pressure of the Ar in mmHg?
NOTE: convert the partial pressure of Ny to mmHg.
a. 1560 mmHg
b. 0.600 mmHg
C. 4.08 atm
d. 1199 mmHg
Answer:
the awnser is c
Explanation:
Answer:
i do not know this one ooooo
why can't 2 cations form a covalent bond?
Answer:
They differ in their structure and properties. Covalent bonds consist of pairs of electrons shared by two atoms, and bind the atoms in a fixed orientation. Relatively high energies are required to break them (50 - 200 kcal/mol). Whether two atoms can form a covalent bond depends upon their electronegativity i.e. the power of an atom in a molecule to attract electrons to itself. If two atoms differ considerably in their electronegativity - as sodium and chloride do - then one of the atoms will lose its electron to the other atom. This results in a positively charged ion (cation) and negatively charged ion (anion). The bond between these two ions is called an ionic bond.
Explanation:
myb this can help you
Using data from seismic waves, geologists have learned that Earth’s interior is made up of several
a.
continents.
b.
layers.
c.
ridges.
d.
trenches.
Answer:
b
Explanation:
the ion SO-² ia given : find the protons electrons and neurons
Answer:
dude did you not pay attention in science the answer is 18- n 20- p 18-e
Explanation: