How many moles of carbon are in 7.00 x 1023 atoms of carbon?
Answer:
1.16 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{7 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{7}{6.02} \\ = 1.162790....[/tex]
We have the final answer as
1.16 molesHope this helps you
5. What is the wavelength of a radio station emitting its signal at 95.5 MHz? Estimate your
answer to the nearest power of ten.
Answer:
[tex]\lambda=314\times 10^{-2}\ m[/tex]
Explanation:
Given that,
Frequency, f = 95.5 MHz
We need to find the wavelength of a radio station emitting its signal.
The relation between the frequency and the wavelength is given by :
[tex]c=f\lambda\\\\\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{95.5\times 10^6}\\\\=3.14\ m[/tex]
or
[tex]\lambda=314\times 10^{-2}\ m[/tex]
So, the wavelength of a radio station is [tex]314\times 10^{-2}\ m[/tex].
What is the wavelength of a 229 Hz sound wave moving at a speed of 345 m/s?
Answer:
wave length=speed/frequency
=345/229
All of the orbitals in a given subshell have the same value of the __________ quantum number
Answer:
magnetic spin
Explanation:
the magnetic spin quantum number i.e + 1/2 or-1/2 ...those are all the orbitals in agiven shell simolarly contains it
Answer:
principal
Explanation:
The quantum numbers that are used in the identification of an electron are n, l, m, and s.
n= principle quantum number
l= azimuthal quantum number
m= magnetic quantum number
s= spin quantum number
All the orbitals in a given subshell have the same value of n(principle quantum number) and l( azimuthal quantum number).
Give 5 examples of limiting factors
Answer:biotic, like food, mates, and competition with other organisms for resources.
Explanation:
Find the wavelength of the electromagnetic radiation with a frequency of 3x10^-18Hz PLEASE ANSWER
Answer:
λ = 1×10²⁶m
Explanation:
Given data:
Wavelength of radiation = ?
Frequency of radiation = 3×10⁻¹⁸Hz
Solution:
Formula:
c = f × λ
c = speed of wave = 3×10⁸ m/s
by putting values,
3×10⁸ m/s = 3×10⁻¹⁸Hz × λ
λ = 3×10⁸ m/s / 3×10⁻¹⁸s⁻¹
λ = 1×10²⁶m
someone please help me with this vocab
Answer:
1) digestion
2) hydroxide ion
3) neutralization
4) pH scale
5) hydrogen ion
6) chemical digestion
7) mechanical digestion
8) salt
Explanation:
I might be wrong though.
Answer:
1) digestion
2) hydroxide ion
3) neutralization
4) pH scale
5) hydrogen ion
6) chemical digestion
7) mechanical digestion
8) salt
Explanation: I just saw this ik its probably really late but i just decied
to give it a try
HELLLLPPPPP PLeeease help im so tired and i need to SLEEP. Answer the 1s you know
1. How does the mechanical energy of a ball that is starting to fall compare to its total energy just before it hits the floor?
2. When you stand in sunlight, what form of energy is emitted by the sun?
3. An eye doctor wants to design reading glasses that also function as sunglasses. Should the eye doctor use a reflective-transparent material or a reflective-opaque material for the lenses? Support your claim.
Answer:
All of the energy from the Sun that reaches the Earth arrives as solar radiation, part of a large collection of energy called the electromagnetic radiation spectrum. Solar radiation includes visible light, ultraviolet light, infrared, radio waves, X-rays, and gamma rays. Radiation is one way to transfer heat.
Answer:
1 kinetic and potential 3 reflective transparent
Plasma is rare on Earth but plentiful in the universe.
A True
B False
Answer:
I think it is a
Explanation:
Plasma is the fourth fundamental state of matter after solid, liquid and gas. At this stage of matter it exists in the form of a gas of ions and free electrons and is highly electrically conductive. Although plasma is abundant in the universe, natural occurrences are relatively rare here on Earth.
PLSSSSSSSSSS HELP!!! I REALLY NEED IT SO MUCH :( I PROMICE TO GIVE BRAINLIEST AND FIVE STARS AND A THANKS! 6TH GRADE SCIENCE! i used all my points for this!
You measure the mass of an apple using a balance. You get these three measurements:
Trial 1: 167.0 g
Trial 2: 166.9 g
Trial 3: 167.2 g
You know that the true mass of the apple is 172 g. Describe your results in terms of precision and accuracy. Explain your answer.
Answer:
100 POINTS! (50 split up) PLSSSSSSSSSS HELP!!! I REALLY NEED IT SO MUCH :( I PROMICE TO GIVE BRAINLIEST AND FIVE STARS AND A THANKS! 6TH GRADE SCIENCE! i used all my points for this!
You measure the mass of an apple using a balance. You get these three measurements:
Trial 1: 167.0 g
Trial 2: 166.9 g
Trial 3: 167.2 g
You know that the true mass of the apple is 172 g. Describe your results in terms of precision and accuracy. Explain your answer in a paragraph for the best grade.
Explanation:
A technician measures the weight of a reagent . The weight is 3269 g. What is the weight in kilograms ? Write your answer as a decimal
Answer:
3.269 kg
Explanation:
1000g = 1 kg. Since kg is the larger unit, you need to divide by 1000 to get kilograms. You can do the problem as a unit conversion:
3269 g × 1 kg = 3.269 kg
1000g
Hope this is helpful!
Definition: This is two or more elements chemically combined in a fixed ratio.
Answer:
Compound
Explanation:
Compounds – Compounds are chemical substances made up of two or more elements that are chemically bound together in a fixed ratio.
Example of compounds includes water (H2O), Hydrogen Peroxide (H2O2), etc. You could see water’s chemical formula, it says it has 2 atoms of Hydrogen combined with 1 atom of oxygen and in hydrogen peroxide, it has 2 atoms of hydrogen and two atoms of oxygen.
What happens when there is a cluster of sunspots?
Answer:
a cluster of sunspots will results in extreme solar flares that can cause mass disruption of electronics on earth.
Suppose an AM talk radio station broadcasts radio waves with a frequency of 930. kHz. Calculate the wavelength of these radio waves.
Round your answer to 3 significant digits.
Answer:
323 m.
Explanation:
From the question given above, the following data were:
Frequency (f) = 930 KHz
Wavelength (λ) =?
Next, we shall convert 930 KHz to Hz. This can be obtained as follow:
1 KHz = 1000 Hz
Therefore,
930 KHz = 930 KHz × 1000 Hz / 1 KHz
930 KHz = 93×10⁴ Hz
Thus, 930 KHz is equivalent to 93×10⁴ Hz
Wavelength (λ) of a wave and the frequency (f) are related according to the equation:
Velocity = wavelength × frequency
v = λf
With the above formula, we can obtain the wavelength of radio wave as follow:
Frequency (f) = 93×10⁴ Hz
Velocity (v) of electromagnetic wave = 3×10⁸ m/s
Wavelength (λ) =?
v = λf
3×10⁸ = λ × 93×10⁴
Divide both side by 93×10⁴
λ = 3×10⁸ / 93×10⁴
λ = 323 m
Thus, the wavelength of the radio wave is 323 m
WHAT ELEMENT IS THIS
Answer: emission spectrum
Explanation:
What is this element help asap
Explanation:
In this element, there are:
11 protons (in blue)12 neutrons (in red), and11 electrons (in green)We find the element with atomic number 11, which is Sodium. (Na)
Answer: sodium
Explanation:
How many molecules are there in a 42.3 g sample of water, H2O?
Answer:
In order to figure out how many molecules of water are present in that
48.90-g
sample, you first need to determine how many moles of water you have there.
As you know, a mole is simply a very large collection of molecules. In order to have one mole of something, you need to have exactly
6.022
⋅
10
23
molecules of that something - this is known as Avogadro's number.
In order to get to moles, you must use water's molar mass. A substance's molar mass tells you the mass of one mole of molecules of said substance.
Water has a molar mass of
18.015 g/mol
. This means that one mole of water molecules has a mass of
18.015 g
.
So, to sum this up,
6.022
⋅
10
23
molecules of water will amount to
1 mole
of water, which in turn will have a mass of
18.015 g
.
Explanation:
Please help I will mark brainliest
Explanation:
light blue is the answer second one
Calculate the H3O+ concentration and then pH in a 0.100 M HC2H3O2 solution that is
1.34% loniped?
HC2H3O2(aq) + H2O(l) > H30(aq) + C2H302- (aq)
Answer:
Please check with the attachment posted.
Please do confirm the answer.
6) Mendeleev put the elements on the periodic table in the order of how
many
it has. *
O electrons
O neutrons
O protons
Answer: Protons
Explanation:
Water + Heat
What is proof of a Chemical Reaction?
Which wave can travel in both empty space and matter?
(10 Points)
A. radio
B. seismic
C. sound
D. water
Seismic waves can move through both empty space and matter. Electromagnetic waves differ from sound waves in this regard because they do not require molecules to move.
What are earthquake waves?Seismic waves are waves that pass through or over the Earth. They can also be caused by explosions, volcanoes, landslides, and earthquakes, which are movements of the Earth's tectonic plates. They can reveal a lot about the Earth's composition. Earthquakes are caused by sudden movement along Earth's fault lines. Seismic waves, which cause damage by traveling through the Earth, are created when movement releases energy from the "elastic strain" that has been stored.This means that electromagnetic waves can travel through solid materials like air as well as across space. Astronauts use radios in this manner to communicate while on spacewalks. Radio waves are an example of an electromagnetic wave.To learn more about earthquake waves refer to:
https://brainly.com/question/26360015
#SPJ2
What is the mass, in kg, of a 2.12-g piece of lead
Answer:
0.00212 kgs
Explanation:
one gram is equal to 0.001 kilograms
A solid reactant is placed into a beaker of a warm water. The liquid vigorously bubbles as the solid dissolves into the solution. What will most likely happen if the temperature of the liquid is slightly reduced?
Answer:
Fewer bubbles will be produced because of fewer collisions of reactant molecules
Explanation:
As the solid dissolves into the solution after the liquid has been vigorously bubbled, if the temperature of the liquid is reduced a little, what will happen is that fewer bubbles will be produced as a result of lesser amount of collisions occurring between the reactant molecules
How many chromium atoms are in 3.56 x 10^-21 moles of potassium chromate?
Answer:
21.44× 10² atoms
Explanation:
Number of chromium atoms = ?
Moles of potassium chromate = 3.56 × 10⁻²¹ mol
Solution:
1 mole of K₂CrO₄ contain 1 mole of Cr.
3.56 × 10⁻²¹ moles of K₂CrO₄ contain 3.56 × 10⁻²¹ moles of Cr.
Number of atoms of Cr:
1 mole contain 6.022× 10²³ atoms
3.56 × 10⁻²¹ mole × 6.022× 10²³ atoms / 1mol
21.44× 10² atoms or 2144 atoms
Evapotranspiration is the process by which
O plants give off water vapor as a waste product as they process energy.
O evaporated water moves through the air and causes differences in climate.
O None of the above.
O rock is shaped as water evaporates off of its surface.
Answer:
A: plants give off water vapor as a waste product as they process energy
Explanation:
Evapotranspiration in plants is defined as the process whereby water is evaporated from its leaves through transpiration during the process of photosynthesis. Different factors like wind, humidity, temperature and availability of water could make it vary.
Comparing all the options, to this definition, the correct answer is Option A.
what is this element
Answer:
Oxygen
Explanation:
From the question given above, the following data were obtained:
Number of electrons = 8
Number of protons = 8
Number of Neutrons = 8
Name of element =?
Next, we shall determine the atomic number of the element. This can be obtained as follow:
The atomic number of an element is simply defined as the number of protons in the atom of the element. Mathematically, it is expressed as:
Atomic number = proton number
From the question given above,
Number of protons = 8
Therefore,
Atomic number = 8
Comparing the atomic number of the element (i.e 8) with those in the periodic table, we can conclude that the element is oxygen since no two elements have the same atomic number.
Which of the following most affects the function of a molecule?
O A. Mass
O B. Solubility
O C. Color
O D. Structure
Answer:
Structure
Explained:
Answer:
d
Explanation:
a p e x :)
Which metal can be extracted from bauxite ore?
Answer:
Aluminum can be extracted from bauxite ore.
question: convert 22.63 miles of oxygen to volume
very urgent
Answer:
506.912 L
Explanation:
From the question given above, the following data were obtained:
Number of mole of O₂ = 22.63 moles
Volume of O₂ =?
Recall:
1 mole of a gas occupy 22.4 L at STP.
With the above information, we obtained the volume occupied by 22.63 moles of O₂ as follow:
1 mole of O₂ occupied 22.4 L at STP.
Therefore, 22.63 moles of O₂ will occupy = 22.63 × 22.4 = 506.912 L at STP.
Thus, 22.63 moles of O₂ is equivalent to 506.912 L.