Choose the statement that is NOT true.
Hundreds of stars with planets have been confirmed using the radial velocity method and the transit method.
The first Earth-size planets ever found outside the solar system were discovered in 2012 by the Kepler Mission team.
Planets orbiting stars in the "habitable zone" are likely to have life existing on them.
More than 50% of the 100 billion stars in the Milky Way galaxy have at least one planet orbiting.
Answer:
More than 50% of the 100 billion stars in the Milky Way galaxy have at least one planet orbiting.
Explanation:
This is False so this would be your Answer
Answer: planets orbiting stars in the habitabke zone are likely to have life existinv on them
Explanation:
because it is false and i took the quiz
plsss helpppp
im confused i dont know the answer
pls
N and C
_____________________________________WHY OPTION A?Because Lithium and Sodium belong to group 1A whereas Magnesium is from group 2A, which are S block elements and they form ionic bond.
_____________________________________HOPE IT HELPS!Answer:
N and C
Explanation:
Os the right answer
Electrons in Atoms
The (type here) of the atom is the most up-to-date model of the atom at this point.
generally speaking, the Bohr model encapsulates the modern understanding of the atom. This model is often depicted in artwork showing a central atomic nucleus and oval lines representing the orbits of the electrons.
Bohr
How does a longshore current change the beach
Answer:
As this sheet of water moves on and off the beach, it can “capture” and transport beach sediment back out to sea. This process, known as “longshore drift,” can cause significant beach erosion.
ELECTRONS AND STUFF HELP
How many total electrons are contained in the orbitals of an ion of tin (IV) ?
Answer:
6 6 6 6 6 6 6 6 6 6 66 666666666
help pls I will give brainliest!
Answer:
The answer is D, I would type it out but it is to long and I'm kind of lazy, but anyways! Your answer is D
Hope This Helps!
An ionic compound is
A.a salt
B.held together by a transfer of electrons
C.composed of anions and cations
D.held together by sharing of valence electrons
can you help me ? directions at the top of the pic.. I only have 30 minutes to do it
1 Select the correct answer! Which statement best explains the octet rule? A. Atoms gain, lose, or share electrons to achieve a full valence shell. D B. Compounds always consist of eight electrons. oa. |||||Molecules always consist of eight atoms. OD. All atoms require eight electrons to form bonds. Reset Next Entum. All rights reserved.
Answer:
A. Atoms gain, lose, or share electrons to achieve a full valence shell
Explanation:
The octet rule is best explained as the process in which atoms lose or gain or share electrons to achieve a full valence shell.
In this process bonds are formed when there is an attraction between the two substances. For electrovalent compounds, an atom will lose electrons or gain electron to form an ion, the electrostatic attraction causes the bond formation. Covalent compounds, form by sharing of electrons.Therefore, the octet rule is attained when atoms gain full valence configuration.
PLEASE HELP!!! 1. What is the scientific name for the following compound using IUPAC rules?
H2O
Answer:
Wouldn’t it be Oxidane, water?
What is the density of a 6 g of pure copper with a volume of 12 mL?
a 0.25 g/mL
b 1.5 g/mL
c 2.3 g/mL
d 0.5 g/mL
Answer:
The density of copper is 0.5 g/mL
Explanation:
Given data:
Mass of copper = 6 g
Volume of copper = 12 mL
Density of copper = ?
Solution:
Formula:
d = m/v
d = density
m = mass
v = volume
d = 6 g/ 12 mL
d = 0.5 g/mL
Thus, the density of copper is 0.5 g/mL
Which is composed of aromatic hydrocarbons?
clothing
barbeque fuel
pain relievers
O polyvinyl chloride
Answer:
the answer is pain relievers
Which is composed of aromatic hydrocarbons?
clothing
barbeque fuel
pain relievers
polyvinyl chloride
Pain relievers are composed of aromatic hydrocarbons. Therefore, option C is correct.
What are aromatic hydrocarbons ?Hydrocarbons with delocalized pi electrons and sigma bonds between their carbon atoms are known as aromatic hydrocarbons. One example is benzene. Since they smell, they are said to as aromatic.
One aromatic ring makes up monocyclic aromatic hydrocarbons (MAHs). The well-known environmental contaminants benzene, toluene, ethylbenzene, and xylenes are among the most combustible and water-soluble aromatic hydrocarbons (BTEX).
The typical aromatic parent structure is benzene. When the benzene ring is a substituent, it is referred to as a phenyl group.
Thus, Pain relievers are make up of aromatic hydrocarbons, option C is correct.
To learn more about an aromatic hydrocarbon, follow the link;
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i need this ASAP i will give brainliest :)
Which term is defined as the ratio of the speed of light in a vacuum to the speed of light in the material it is passing through?
Answer:
I really dont know i just guessed :(
Explanation:
Answer:
index of refraction
Explanation:
Tendency of an object to float
Answer:
Buoyancy is the ability or tendency of an object to float in a fluid: a liquid or a gas. This happens because fluid pressure increases with depth. According to Archimedes' Principle, the buoyant force on a submerged object is equal to the weight of the liquid displaced by the object.
Explanation:
Isotopes of the same element have different numbers of
A protons
B neutrons
C neutrons and electrons
D protons and electrons
y’all help me out i’m so dumb 3
which of the following can be agents of erosion? (alternate phrasing: which of the following can cause erosion)
moving water
wind
ice and glaciers
humans and animals
all of the above
4 Identify What are the starting materials
and products of photosynthesis and cellular
respiration?
Answer:
Detail is given below.
Explanation:
Photosynthesis:
Reactants = Carbon dioxide + water + energy
Products = glucose + oxygen
Chemical equation:
6H₂O + 6CO₂ + energy → C₆H₁₂O₆ + 6O₂
It is the process in which in the presence of sun light and chlorophyll by using carbon dioxide and water plants produce the oxygen and glucose.
water is supplied through the roots, carbon dioxide collected through stomata and sun light is capture by chloroplast.
Cellular respiration:
Reactants = Glucose + oxygen
Products = carbon dioxide + water + 38ATP
Chemical equation:
Glucose + oxygen → carbon dioxide + water + 38ATP
It is the breakdown of glucose molecule in the presence of oxygen to yield large amount of energy. Water and carbon dioxide are also produced as a byproduct.
Which of the following is not a controllable risk factor?
a. smoking
b. inactivity
c. aging
d. over eating
Answer:
C) Aging
Explanation:
You can't stop that or change the rate that you age at. its inevetable :D
What is the difference between a hyrdrogen atom and a hydrogen molecule?
Answer:smaller
Explanation:
Answer:
Explanation:
A hydrogen atom (H) is bonded to form hydrogen gas(H2)(a molecule)
Which of these describes a challenge that the engineer of a high-altitude
airplane would need to consider?
A. More fuel is used at higher altitudes.
B. The airplane may succumb to the power of gravity as lift
decreases at higher altitudes.
C. The airplane may need a heat shield for protection from sonic
booms.
O D. The airplane will create more drag at higher altitudes than lower
altitudes.
Answer:
I think its (B)
Explanation:
as when the air thins out at higher elevations, your lift decreases so at some point, the plane cant produce enough lift to overcome gravity.
what further observation led mendeleev to create the periodic table
Answer:
;,knbbbknnbkhbln bhbj k; b; m j
Explanation:
(100 points) Atleast 5 slogans on saving fuel.
Answer:
Save Fuel, Save Earth
Fuel and time wait for none!
Be wise, don’t waste fuel
Save fuel, stop being cruel
Don’t contribute towards global warming
Care for future, save fuel
Hope That Helps!!!
Explanation:
Here are Best Slogans on Save Fuel.
-Towards a better future.
-Save to sustain.
-Save fuel for a better world.
-Make sure to keep some for the next generation.
-Our resources are limited.
-Save to expand.
-Saving fuel has no alternatives.
-Save money while saving fuels.
Now look closely at the patterns in the table. Compare the elements in each column and
row. What can we say about elements in the same group and elements in the same period
of the periodic table?
Select all the correct answers.
- The number of electrons in the second energy level increases by one down each
column.
Elements in the same row have the same number of ocupied energy levels.
For each column, the last occupied energy level has the same number of electrons.
The number of electrons in the first energy level increases by one from Li to Ne.
Answer:
A the first 1
Explanation:
Why do you think Earth's plates move on the surface?
Explanation:
heat in the Earth's core
10. A(n) eclipse occurs at a full moon when Earth is directly between the moon and the sun.
Answer:
Yes indeed
Explanation:
If the mass is 7150 kg, and the
acceleration is 2 m/s2, then what is the
force?
Explanation:
f= ma
f= 7150 *2
f= 14300N
The force will be equal to 14300N when the mass is 7150 kg and the
acceleration is 2m/s².
What is force?Force is an external agent that can change a body’s state of rest or motion. Force has a direction and a magnitude so it is a vector quantity. The SI unit of force is Newton and the unit used is Kgm/s².
Force can change the state of a body from rest to motion and can accelerate the speed of a moving body. The direction of a moving object can be changed by applying force.
The force is expressed by the product of the mass (m) and acceleration (a) of an object. The mathematical equation for force can be expressed in the form of:
F = ma
Given, the mass (m) = 7150 Kg and acceleration (a) = 2 m/s²
Then, force, F = (7150 Kg) × (2 m/s²)
F = 14300 Kgm/s²
or, F = 14300 N
Therefore, the force of the object will be equal to 14300 N.
Learn more about force, here:
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If L = 5, then the magnetic quantum number "mL" can be equal to
a. -4, -3, -2, -1, 0, +1, +2, +3, +4
b. -5, -4, -3, -2, -1, 0, +1, +2, +3, +4, +5
c. 0, 1, 2, 3, 4
d. 0, 1, 2, 3, 4, 5
b. -5, -4, -3, -2, -1, 0, +1, +2, +3, +4, +5
Further explanationEach orbital in an atom consists of 4 quantum numbers
n is the principal quantum number.
l is the angular momentum / azimuthal quantum number
ml, the magnetic quantum number
ms, the electron-spin quantum number
Value of n: positive integer
value of l: s = 0, p = 1, d = 2, f = 3 , ..(n-1)
ml value: between -l to + l
ms value: +1/2 or -1/2
So for L=5, mL value : -5 to +5
Calcium nitrate and calcium carbonate are both ionic compounds.
Calcium nitrate mixed with water behaves as an electrolyte.
Calcium carbonate mixed with water does not behave as an electrolyte.
Explain, in terms of solubility and movement of ions, this difference in behaviour
Answer:
Calcium nitrate is soluble in water and dissociate into ions whereas calcium carbonate is insoluble and water and do not form ions.
Explanation:
An electrolyte is a substance which conducts electricity in molten form or when dissolved in water.
The ability of an electrolyte to conduct electricity is due the movement of charged particles called ions. The ions are of two types: negatively charged ions called anions and positively charged ions called cations.
Calcium nitrate is a soluble in water, and when dissolved in water produces two ions; negatively charged nitrate ions,NO₃⁻, and positively charged calcium ions, Ca²⁺. These ions enable it to conduct electricity.
Calcium carbonate on the other hand is insoluble in water, and thus, do not produces any ions capable of carrying current.
A factory produces a certain chemical at a rate of 3.5 grams per second. How many kilograms of the chemical are produced each hour?
1 kilogram = 1.000 grams
1 hour = 3.600 seconds
Express the answer to the correct number of significant figures.
The factory produces
kilograms of the chemical per hour.
Answer:
12.6kg
Explanation:
3.5×3,600 then convert to kg
Which indicates how evidence of climate change supports the theory of continental drift?
coal fields in several continents
volcano formation
glacial evidence found in South America
folded mountains in Africa and South America
Glacial evidence found in South America, do indicate how evidence of climate change has supports the theory of continental drift.
Climate change occurs daily all over the world. This is largely due to man's activities that has affected the atmosphere and the earth.Continental drift is simply known as the theory that states that the continents at a time has formed a single landmass, broke up, and drifted to their present locations. Glacial evidence in South America has made man to believe more in the continental drift hypothesis.Conclusively, we can therefore say that Glacial evidence found in South America, do indicate how evidence of climate change has supports the theory of continental drift.
Learn more from
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Answer:
glacial evidence found in South America
Explanation:
