Answer:
No = Avagardro's number = 6.02 x 10^23
No.of atoms = no.of moles x No x atomicity
= 75.4 x 6.02 10^23 x 1
= 453.908 x 10^23 atoms .
What element would have this electron configuration:
1s22s22p 3s 3p 4s 3d
Answer:
you need to put a choice if you want help add the possible answers
Explanation:
You are standing at position X. Choose the diagram that shows your position when you perceive a sound lower than the actual pitch of the siren.
Answer:
The answer is the second picture.
Explanation:
When you perceive a sound lower than its actual pitch, then you must have been further from the actual position.
What is pitch of a sound?
The pitch of a sound is a perceptual property of sounds that allows sound of similar frequencies to be distinguished.
Pitch is the quality of sound, that makes it possible to judge sounds as "higher" and "lower" in the sense associated with musical notes.
Thus, when you perceive a sound lower than its actual pitch, then you must have been further from the actual position.
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How many total atoms are in the formula 2H2SO4
Answer:
In 2H2SO4, the number of hydrogen atoms is (1,2,4,8) the number of sulfur atoms is (1,2,4,8) and the number of oxygen atoms is (1,2,4,8)
Explanation:
I've done this problem before, but I did it a month or so back so I'm not 100% sure but I'm pretty sure this is the correct answer. Hope this helps!
Answer:2 hydrogen atoms 1 sulfur atom 4 oxygen atom
hope I helped!
What does the acronym BARF
Answer:
Born Again Raw Feeders
Which has a higher electronegativity phosphorus or sodium
Answer:
sodium
Explanation:
Describe the overall structure or order of the scientific process.
Answer:
Explanation:The scientific method is an empirical method of acquiring knowledge that has characterized the development of science since at least the 17th century. It involves careful observation, applying rigorous skepticism about what is observed, given that cognitive assumptions can distort how one interprets the observation. It involves formulating hypotheses, via induction, based on such observations; experimental and measurement-based testing of deductions drawn from the hypotheses; and refinement (or elimination) of the hypotheses based on the experimental findings. These are principles of the scientific method, as distinguished from a definitive series of steps applicable to all scientific enterprises.[1][2][3]
Though diverse models for the scientific method are available, there is in general a continuous process that includes observations about the natural world. People are naturally inquisitive, so they often come up with questions about things they see or hear, and they often develop ideas or hypotheses about why things are the way they are. The best hypotheses lead to predictions that can be tested in various ways. The most conclusive testing of hypotheses comes from reasoning based on carefully controlled experimental data. Depending on how well additional tests match the predictions, the original hypothesis may require refinement, alteration, expansion or even rejection. If a particular hypothesis becomes very well supported, a general theory may be develope
Which option is an example of a chemical change?
A spreading peanut butter
B cutting bread
C digesting a sandwich
D stirring jelly
Answer:
Digesting a sandwich because it cant be reversed.
Which element is an inner transition metal?
uranium (U)
osmium (Os)
radium (Ra)
hafnium (Hf)
Answer:
Os
Explanation:
Atoms of different element can not have same atomic number because only same type of atoms combine to form element. Atoms belonging to different element can have different atomic number. Therefore, the correct option is option A.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same. Two or more than two atoms with different physical or chemical properties can not combine together to form an element.
Among all the given options, uranium (U) is an inner transition metal. Inner transition metal are the metals that belongs to f block of periodic table as their last electron goes into f subshell.
Therefore, the correct option is option A.
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TIME FOR SOME MORE STUPID QUESTIONSSSSS lol
What color is glass o.o
Answer:
ORANGE WAIT NO IM COLOR BLIND
Explanation:
The table below shows the average seasonal relative humidity during the summer in four locations:
Relative Humidity
Location Average Seasonal Relative Humidity (%)
A 76
B 81
C 60
D 98
Which location is most likely to experience frequent summertime storms?
Location A
Location B
Location C
Location D
Answer:
the answer is B
Explanation:
because its asking you the frequent summertime storms
hope it helps you
Answer:
b is your answer i'm sure of it :)
Explanation:
have great day :)
3.5 moles of nitric acid
Answer:
Socratic app
I just learned it
What are examples of evaporation?
Answer:
Boiling water
Explanation:
The water evaporates from the pot
Answer:
Drying Clothes under The SunWet FloorsDrying of Wet HairWater from the Ocean getting evaporatedWhen you get out of the shower, the water on your body evaporates as you dry. If you leave a glass of water out, the water level will slowly decrease as the water evaporates.Sweating
I need help with this, I'm not understanding.
Answer:
C. 5 grams
Explanation:
The ratio is 2:1, which means everything on the right (B) will be half of the left (A). Since 10 is on the left, and half of 10 is 5, C is the answer
Arrange the following elements in order of increasing ionization energy
Picture of elements included.
Ionization Trend: First ionization energy will increase left to right across a period and increase bottom to top of a family (column).
A) Sr, Be, Mg are all in column 2 of the periodic table. Based on the first ionization rule above, from increasing to decreasing energy, the order is: Be, Mg, Sr
B) Bi, Cs, Ba are all in the same row of the periodic table. Based on the first ionization rule above, from increasing to decreasing energy, the order is: Bi, Ba, Cs
C) Same rule as above. Order is: Na, Al, S
The elements in increasing order of ionization energy will be:
a) Be, Mg, Sr
b) Bi, Ba, Cs
c) Na, Al, S
Ionization energy trend:Ionization Trend: First ionization energy will increase left to right across a period and decrease bottom to top of a family (column).
A) Sr, Be, Mg are all in column 2 of the periodic table. Based on the first ionization rule above, from increasing to decreasing energy, the order is: Be, Mg, Sr
B) Bi, Cs, Ba are all in the same row of the periodic table. Based on the first ionization rule above, from increasing to decreasing energy, the order is: Bi, Ba, Cs
C) Similarly, Order is: Na, Al, S
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Make a claim describing the relationship between Force and distance.
Answer:
A force is described as any influence that causes an object to undergo a change. Distance refers to how far an object travels over a period of time. The greater the force that is applied on an object the further distance that object will travel.
How many chloride ions are there in 4 mol of CaCl2
Answer:
48.176 ×10²³ chloride ions
Explanation:
Given data:
Number of chloride ions = ?
Number of moles of CaCl₂= 4 mol
Solution:
One mole of CaCl₂ contain 2 moles of chloride ions.
CaCl₂ → Ca²⁺ + 2Cl⁻
4 moles of CaCl₂ contain,
4 ×2 = 8 moles of chloride ions
Number of chloride ions:
1 mole = 6.022×10²³ ions
8 mol × 6.022×10²³ ions/ 1 mol
48.176 ×10²³ ions
identify the element in the following period and group period 2 and group 17
Answer: I looked at the periodic table and the element that lines up between the two is F which is Fluorine.
Explanation: I hope this helps!
The element in period 2 of group 17 is fluorine.
What is fluorine?
Fluorine is the most chemically reactive and electronegative of all the elements. It is a single-valent toxic gaseous halogen that is pale yellow-green in color. Even with the noble gases krypton, xenon, and radon, fluorine easily combines with the majority of other elements to generate new compounds.
Glass, metals, and even water, as well as other materials, burn with a brilliant flame in a jet of fluorine gas because it is so reactive. The fluoride ion F- is the most frequent form of fluorine in aqueous solutions. Fluorides are substances that contain fluoride along with a positively charged partner.
Fluorine is indirectly utilized in the manufacturing of uranium, low friction polymers like teflon, and halons like freon. Fluorochlorohydrocarbons are widely utilized in refrigeration and air conditioning.
Therefore, the name of the element is fluorine.
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The nucleus of an atom is _______________________ charged.
Answer:
positively charged
Which describes a homogeneous mixture?
A solvent dissolves in a solute to make a solution.
A solute dissolves in a solvent to make a solution.
A solution dissolves in a solute to make a solvent.
A solution dissolves in a solvent to make a solute.
Answer: ik im late but I got b
Explanation:
A homogeneous mixture can be described as the solute uniformly dissolving in a solvent to make a solution. Therefore, option (B) is correct.
What is a homogeneous mixture?A mixture can be described as a combination of two or more substances that are not chemically combined with each other. Mixtures can be categorized into two kinds homogeneous mixtures and heterogeneous mixtures.
A homogeneous mixture can be defined as one whose whole composition is uniform throughout the entire mixture. It can be the type of mixture where the entire composition is constant throughout that make up the mixture and is distributed uniformly.
A homogeneous mixture can be described as a gaseous, liquid, or solid mixture that has equal proportions of its components throughout the sample. In a homogeneous mixture, there is only one phase of matter observed.
Some examples of Homogeneous Mixtures are Air Rainwater, Vinegar, Dishwashing detergent, Steel, Sugar water, a Cup of Coffee, etc.
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I need a Concept map of acids and bases. Thank you!
Answer:
sorry it's so tiny
Explanation:
A sound wave has a frequency of 20 Hz and a wavelength of 100 m. What is speed of the wave
The speed of a wave can be calculated using this formula:
v = f x λ
Where:
v is the wave speed in metres per second, m/s
f is the frequency in hertz, Hz
λ (lambda) is the wavelength in metres, m
Calculation:
Given:
f = 20 Hz
λ = 100m
Using the equation:
v = f x λ
v = 20 x 100
v = 2000 m/s
Therfore, the speed of the wave is 2000 m/s
A sound wave has a wavelength of 100 m and a frequency of 20 Hz. The wave's speed is 2× 10^3 m/s.
assuming frequency = 20 Hz and wavelength = 100 m
utilized concept: v= = 20×100 = 2×10³ m/s
Why is frequency important?The frequency in physics is the quantity of waves passing a fixed location in a unit of time. It also indicates how many cycles or vibrations a body in periodic motion experiences in a given unit of time.
How would you define sound?A sort of energy created by vibrations is sound. The molecules of the air surrounding an item vibrate as a result.. These molecules vibrate because they collide with nearby molecules, which also vibrate as a result.
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What do you look for when trying to identify a formula and/or compound name as ionic?
Answer:
Ionic compounds are named with the cation first and the anion last. The same convention is used when writing their chemical formulas.
Explanation:
the size of a marble is an example of
physical change
physical property
chemical change
chemical property
Answer:
Physical property
Explanation:
If it is right then please rate my answer. also, brainlest would not hurt if it is the brainlest answer.....
Which of the following has a higher electronegativity oxygen or selenium?
Answer:
Between oxygen and selenium, oxygen is more electronegative because of more ionisation energy and small size
Explanation:
What is the pH of a solution that has the same number of hydrogen ions as hydroxide ions?
0
1
7
14
Answer:7
Explanation:
Answer:
its c
Explanation:
4)If light is acting like a particle, then what should you adjust in the simulation to
make faster-moving electrons leave the metal surface
Answer:
We can either increase the frequency of the light source or decrease the wavelength of the light source in the simulation
Explanation:
When light approaches or strike a metal surface, we can observe electrons coming out the metal surface. So, when a light wave hits a metal surface, it becomes protons; thus, we can either increase the frequency of the light source or decrease the wavelength of the light source in the simulation.
Thus, a higher energy photon will strike the electron, and the electrons tend to gain energy from the photons.
is gasoline a heterogeneous mixture o
Distinguishing Between Pure Substances and Mixtures
Pure substances can be either elements or compounds. Mixtures can be either homogeneous or heterogeneous. ... Gasoline is thus a blend of different compounds, so it is a mixture.
Does changing the number of neutrons affect the atomic number?
Answer:
awsdxcvawsd
Explanation:
Answer:If you change the number of neutrons in an atom, you get an isotope of the same element. The addition of a neutron can make an atom radioactive. When you change the number of protons in an atom, you will change the atom from one element to a different element.
Explanation:
widte speed rom me and distance 502
A yacht sailed at a steady speed for 0.5 hours, passing a cruise ship that was traveling at 25
kilometers per hour. During that time, the yacht traveled 50 kilometers. What was the yacht's
speed?
Write your answer as a whole number.
kilometers per hour
Submit
The speed of the yacht : 100 km/h
Further explanationLinear motion consists of 2: constant velocity motion with constant velocity and uniformly accelerated motion with constant acceleration
At constant velocity motion:the speed of vo = v = constant
acceleration = a = 0
Δx = vt or x = xo + vt
An equation of constant velocity motion
[tex]\large {\boxed {\bold {x = v \times \: t}}}[/tex]
x = distance = m
v = speed = m / s
t = time = seconds
A yacht sailed at a steady speed for 0.5 hours, and traveled 50 kilometers
so the velocity/speed:
[tex]\tt v=\dfrac{x}{t}\\\\v=\dfrac{50~km}{0.5~h}=\boxed{\bold{100~km/h}}[/tex]
Match each description to a type of radiation Drag each item to the appropriate bin.
Answer:
Explanation:
Beta radiations:
mass 1/200 , charge -1, medium penetration
Beta radiations are result from the beta decay in which electron is ejected.
The mass of beta particle is smaller than the alpha particles.
They can travel in air in few meter distance.
These radiations can penetrate into the human skin.
The sheet of aluminum is used to block the beta radiation
Properties of alpha radiation:
mass 4 amu, charge +2, least penetration
Alpha radiations are emitted as a result of radioactive decay. The atom emit the alpha particles consist of two proton and two neutrons. Which is also called helium nuclei. When atom undergoes the alpha emission the original atom convert into the atom having mass number less than 4 and atomic number less than 2 as compared to parent atom the starting atom.
Alpha radiations can travel in a short distance.
These radiations can not penetrate into the skin or clothes.
These radiations can be harmful for the human if these are inhaled.
These radiations can be stopped by a piece of paper.
Gamma radiations:
mass 0, charge 0, deepest penetration
Gamma radiations are high energy radiations having no mass.
These radiations are travel at the speed of light.
Gamma radiations can penetrate into the many materials.
These radiations are also used to treat the cancer.
Lead is used for the protection against gamma radiations because of its high molecular density.
The lead apron are used by the person when treated with gamma radiations.
