Which bond is the longest?
What period and group (number and name) is Selenium in?
Answer:
Group 16 Melting point 220.8°C, 429.4°F, 494 K
Period 4 Boiling point 685°C, 1265°F, 958 K
Explanation:
How many moles are in 1.52908x1024 molecules of Potassium phosphate (K3(PO4))?
Answer:??? moles K3(PO4) (no rounding)
Answer:
2.54 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{1.52908 \times {10}^{24} }{6.02 \times {10}^{23} } \\ [/tex]
We have the final answer as
2.54 molesHope this helps you
Please Answer fast
Which best explains why a black T-shirt gets warmer in the Sun than a white T-shirt?
Darker colors reflect more energy from colliding particles than lighter colors do.
Darker colors absorb more energy from colliding particles than lighter colors do.
Darker colors reflect more energy from electromagnetic waves than lighter colors do.
Darker colors absorb more energy from electromagnetic waves than lighter colors do.
Answer:
D: Darker colors absorb more energy from electromagnetic waves than lighter colors do.
Explanation:
on edge2021! hope this helps!!~
Darker colors absorb more energy from electromagnetic waves than lighter colors do. Therefore, option B is correct.
What is reflection of light ?Reflection of light refers to the bouncing back of light rays when they hit a surface, such as a mirror or any other smooth, shiny object. When light strikes a surface, some of it is absorbed by the surface, some of it is transmitted through the surface, and some of it is reflected.
The angle at which the light strikes the surface, known as the angle of incidence, determines the angle at which the light is reflected, known as the angle of reflection.
When light hits an object, some of the energy is absorbed by the object and some of it is reflected. Darker colors absorb more energy from the light, while lighter colors reflect more of the energy away.
Therefore, a black T-shirt absorbs more energy from the Sun's rays, making it warmer than a white T-shirt which reflects more of the energy away.
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Whoever answers this correctly, I will give Brainliest. Plz hurry!!:)
Which series of words describe lengths of geologic time from shortest to longest?
A. eon
B. era
C. period
D. era
Answer:
eon era period
Explanation:
Find the % composition of hydrogen in hydrogen sulphide
Answer:
5.88%
Explanation:
percent composition depends on relative atomic mass.
the percentage of component present in a compound is
(relative formula mass of component
÷
relative formula mass of compound)
⋅
100
%
the relative atomic mass of
H
(hydrogen) is
1
the relative formula mass of
H2 is 2
the relative atomic mass of S (sulphur) is 32.
2+32=34 the compound H2S is known as hydrogen sulphide.
relative formula mass of
H2÷relative formula mass of (H2S)⋅100%=2/34⋅100%=5.88% (2d.p.)
pls help bc this is due at 3:30pm
Answer:
No picture :(
Explanation:
Whats the noble gas configuration for platinum?
Answer:
[Xe] 4f14 5d9 6s1
Explanation:
Look at the image shown
What does this image represent?
a) Linear molecule with one domain
b) Linear molecule with two domains
c) Tetrahedral molecule with four domains
d) Trigonal planar molecule with three domains
Answer:
b) Linear molecule with two domains
Explanation:
The image represents a linear molecule with two domains.
The compound shown here is carbon dioxide in which a central carbon atom is surrounded by two oxygen atoms.
This bond geometry is of the type AX₂ In this linear molecule the bond angle is a perfect 180° The lone pairs are perfectly balanced out and will not cause distortion of the central carbon.The image has been consisted of the linear molecule with two domains. Thus, option B is correct.
The given image has been the structure of the carbon dioxide. There has been the two oxygen atoms that has been linked with the central carbon atom.
The molecules have been consisted of equal number of valence electrons, thus the structure has been causing lesser extent of the distortion. The symmetrical structure has been consisted with the linear symmetry.
Thus, the image has been consisted of the linear molecule with two domains. Thus, option B is correct.
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The illustration above depicts a spring being compressed and then released. Changes in both potential and kinetic energy occur
during this process. Which statement most accurately describes the changes in potential or kinetic energy?
A)
the kinetic energy is continually increasing throughout the entire process
B)
the potential energy is continually increasing throughout the entire
process
C)
the potential energy is increasing through steps A & B, then decreases at C.
D)
the potential energy is decreasing through steps A, B, & C and then
increases
Answer:
C)
the potential energy is increasing through steps A & B, then decreases at C.
Explanation:
The atmosphere of Venus consists mostly of _____.
A.) sulfur
B.) carbon dioxide
C.) oxygen
D.) hydrogen
The atmosphere of Venus consists maximum of carbon dioxide. The correct option is B.
Why it is not possible to have life on Venus?With extreme surface temperatures approaching 735 K and an atmospheric pressure 90 times that of Earth, Venus's conditions make water-based life as we know it on the planet's surface unlikely.
The atmosphere is also full of carbon dioxide which makes it impossible to sustain life.
Thus, the correct option is B.
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Potassium has a 1+ charge, and oxygen has a 2− charge. A Lewis dot diagram should contain two potassium atoms and one oxygen atom to show how these atoms form an ionic bond. (1 point) True False
Answer:
True
Explanation:
Potassium is a group one element with a charge of +1 and oxygen with a charge of -2,
A lewis dot diagram should contain two potassium atoms and one oxygen atoms to show that they form an ionic bond.
To form an ionic bond, an atom will either lose or gain electrons. The oxygen atom has a charge of -2, Potassium has charge of +1 To make the bond occur, two atoms of potassium that are positively charge will bond with the oxygen with a charge of -2.Answer:
True
Explanation:
Took the quiz got it right
Please help solve this ASAP
Answer: i'd prolly say (e)
Explanation: if you ignore the letters and pay more attention to the symbols and numbers you can see that adding 18 to 2 makes 20 which is not an exponent and the 40 and 4 that are exponents put together makes 44 as dumb as it sounds it was a reasonable purpose behind it hope i did something
Which of the following forms of invisible light, would have the highest wavelength?
Group of answer choices
you snap chatting your friends
a microwave warming up some mac-n-cheese
someone getting dental x-rays taken
a set of U/V (ultraviolet) lights sanitizing the lab safety glasses
Answer:
you snap chatting your friends
Explanation:
The waves that will have the highest wavelength from the given choices is by snap chatting with your friends.
Snap chatting involves the use of radio waves. Radio-waves are a part of electromagnetic waves and they have very long wavelength. It is used in radio communications as in mobile phones. x-rays have the shortest wavelength of all the waves.Identify whether this statement has kinetic or potential energy, both, or neither
“The energy stored in an object due to its position (or height).”
Answer:
Neither
Explanation:
Kinetic, or potential energy, is the average amount of molecules in a substance
4. The compound iron sulfide can be formed by
filtering b. evaporating c. heating
d. mixing
a.
Answer:
heating :))))))))))))))
Explanation:
the same as the last answer i posted... sorry it just came up in my recommended questions to answer
Explain the relationship between the number of daylight hours and season. (full sentence)
Answer:The tilt of the Earth's axis also defines the length of daylight. Daylight hours are shortest in each hemisphere's winter. Between summer and winter solstice, the number of daylight hours decreases, and the rate of decrease is larger the higher the latitude. The fewer sunlight hours the colder the nights
Explanation: That's a answer for you.
Which of the following is(are) the reason(s) metals are good conductors of heat and electricity? Select all that apply
Answer: The question is incomplete and the options are not given but here are the options.
a. Metals can absorb more heat flow than other elements before damage occurs.
b. Particles of metallic structure begin to vibrate faster as they absorb energy.
c. Metals have a larger number of freely moving electrons.
d.Metals have high densities.
e. Metals have high melting points.
The correct options are c,d and e.
c. Metals have a larger number of freely moving electrons.
d.Metals have high densities.
e. Metals have high melting points.
The correct options are c,d and e.
Explanation:
Metals are real good conductor of heat because of the following;
Metals have larger number of freely moving electrons and these electrons move in random motion that is they are not stable, they from from place to place. Current generated in a direction is destroyed by current produced in another direction also.
Metals have high densities which is because their crystal lattice are packed very tight in the metallic structure making the metal bond to be stronger and conduct heat.
Metals have high melting point because that have a very strong metallic bond and this bond require a lot of energy to break, therefore making it to conduct heat and electricity.
Which is a dominant trait that Mendel observed in pea plants?
bumpy pods
short height
yellow seeds
white flowers
Answer:
Yellow seeds
Explanation:
Dominant traits are those that are inherited unchanged in a hybridization like the yellow seeds.
Answer:
yellow seeds
Explanation:
Please help Question is due in a few minutes
Answer:
D
Explanation:
becuase is is a good conductor electronically and it is ductile meaning you can make it into wire and that is helpful for circuts.
please help asap!! will give brainliest if right.
A student listed the characteristics of chemical and nuclear reactions.
Chemical and Nuclear Reactions:
X - Changes the identity of the element
Y - Does not change the identity of the element
Which of these statements best explains the identity of Reaction X?
It is a nuclear reaction because the identity of elements changes when there is a change in the number of protons and neutrons.
It is a chemical reaction because the identity of elements change when there is a change in the mass of the atoms involved.
It is a chemical reaction because the identity of elements change when there is a change in the overall energy of the system.
It is a nuclear reaction because the identity of elements change when there is a change in the number of outermost electrons.
Answer:
1st answer is right
Explanation:
nuclear reaction takes place when number of proton or neutron changes in a nucleus forming new products
for eg uranium goes nuclear reaction and gives thorium
Answer:
It is a nuclear reaction because the identity of elements changes when there is a change in the number of protons and neutrons.
Explanation:
the other guy needs a brainliest
Which of the following is a compound?
A.
H
B.
Sn
C.
CO
D.
Mg
Which could be a reason viruses are considered nonliving things?
which could be a reason virus are considered non living things
Which statement describes DNA?
The answer: DNA stores an organism’s genetic code.
Answer:
DNA stores an organism’s genetic code.
Explanation:
guyss send help will giv da crown to whos right u-u
the block of aluminium shown above has a height of 4.0mm a width of 6.0mm and a depth of 1.8mm , if its mass is 116.64mg , what is its density in g/cm3?
Answer:
[tex]4m^2[/tex]
Explanation:
Multiply [tex]m[/tex] by [tex]m[/tex], by adding the exponents
What is molarity? .
3. Which of these displacement reactions will produce the most energy?
a) Iron oxide with Aluminium
b) Magnesium and copper oxide
c) Magnesium and silver nitrate
Iron oxide with Aluminium is the displacement reaction which will produce the most energy and is denoted as option A.
What is Thermite reaction?
This is the reaction between Iron oxide and Aluminium and is characterized by large release of energy during combustion.
This is because of the large difference in reactivity between both of them during the displacement reaction.
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What is a limitation of using a chemical formula such as C6H12O6 to represent a compound?
Answer:
The chemical formula does not show how the atoms are connected to one another.
Explanation:
Answer:
B: The chemical formula does not show how the atoms are connected to one another.
Explanation:
Got correct on EDG unit test review
Pls mark me brainliest
What type of chemical reaction occurs when more energy Is released during the chemical reaction than is needed to start the chemical reaction
Answer:
Explanation:
Exothermic Reactions
Exothermic Reactions
This means that the energy required to break the bonds in the reactants is less than the energy released when new bonds form in the products. Excess energy from the reaction is released as heat and light. Figure: Chemical reaction: A Hermite reaction, which produces molten iron.
