Answer:
When the electron transits from an excited state to its lower energy state, it will gice off the same amound of energy needed to raise to that level. This emitted energy is a photon.
The answer is C, 3s to 3p.
freezing point depression is
The equation below is unbalanced.
C3H8+O2-> CO2+H2O
When the equation below is correctly balanced, what is the coefficient of O2?
A. 2
B. 3
C. 4
D. 5
Please answer!! No links please!!!
Answer:
D. 5
Explanation:
C3H8 + 5O2 = 3CO2 + 4H2O
Carbon = 3 on both sides
Hydrogen = 8 on both sides
Oxygen = 10 on both sides
The balanced chemical equation for C₃H₈ + 5O₂ = 3CO₂ + 4H₂O
What is a balanced chemical equation?A balanced chemical equation is one in which several reactants are equal to several products.
The formulas for the reactants and products are used to create a balanced equation that represents a chemical reaction. It displays how many units of each chemical were used.
The left and right sides of the reaction arrow of a balanced equation have an equal number of each type of atom.
The reactants and products are placed on the left and right sides of the arrow, respectively, to create a balanced equation.
Carbon = 3 on both sides
Hydrogen = 8 on both sides
Oxygen = 10 on both sides
Therefore, The balanced chemical equation for C₃H₈ + 5O₂ = 3CO₂ + 4H₂O.
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PLEASE HELP ME WITH THID IFK IT!! ILL GIVE YOU EXTRA POINTS
What coefficient is needed to balance the reaction
CaCl2 + H2CO3 → CaCO3 + HCI?
Answer:
CaCl2 + H2CO3 -> CaCO3 + 2HCl
Explanation:
Balancing this equation was a relatively simple example. Making sure to have all parts on the left equal to the ones on the right is the most important part.
Ca 1 = 1
Cl 2 = 2
H 2 = 2
C 1 = 1
O 3 = 3
Answer:2HCl
Explanation: just did it
What is the process whereby stars create elements heavier than hydrogen?
atomic growing
atom splitting
nucleosynthesis
hydrogenation
Answer:
nucleosynthesis
Explanation:
The correct answer is nucleosynthesis.
How do stars create heavier elements?After the hydrogen in the star's core is exhausted, the star can fuse helium to form progressively heavier elements, carbon and oxygen, and so on, until iron and nickel are formed. Up to this point, the fusion process releases energy. The formation of elements heavier than iron and nickel requires an input of energy.
What was the process of the formation of heavy elements?In a supernova explosion, neutron capture reactions take place (this is not fusion), leading to the formation of heavy elements. This is the reason why it is said that most of the stuff that we see around us comes from stars and supernovae (the heavy elements part).
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characteristic of compounds
Answer:
Characteristics of a compound
The properties of a compound are different from the properties of its constituents. Formation of a compound is generally accompanied by evolution of energy in the form of heat or light. A compound has a fixed melting point and boiling point. A compound is always homogeneous in nature.
You have 150.0 mL of a 0.415 M solution of Ce(NO₃)₄.
a) What mass (in grams) of Ce(NO₃)₄ would be required to make the solution?
B) What is the concentration of the nitrate ions in the solution ?
C) If the original solution was diluted to 350.0 mL, what would be the new concentration of the Ce(NO₃)₄ in the solution?
A. The mass (in grams) of Ce(NO₃)₄ that will be required to make the solution is 24.16 g
B. The concentration of the nitrate ions in the solution is 1.66 M
C. The new concentration of the Ce(NO₃)₄ solution is 0.178 M
We'll begin by calculating the number of mole of Ce(NO₃)₄ in the solution.
Molarity = 0.415 M
Volume = 150 mL = 150 /1000 = 0.15 L
Mole of Ce(NO₃)₄ =?Mole = Molarity × Volume
Mole of Ce(NO₃)₄ = 0.415 × 0.15
Mole of Ce(NO₃)₄ = 0.06225 moleA. Determination of the mass of Ce(NO₃)₄ required to make the solution.
Mole of Ce(NO₃)₄ = 0.06225 mole
Molar of Ce(NO₃)₄ = 140.12 + 4[14 + (16×3)]
= 140.12 + 4[14 + 48]
= 140.12 + 4[62]
= 140.12 + 248
= 388.12 g/mol
Mass of Ce(NO₃)₄ =?Mass = mole × molar mass
Mass of Ce(NO₃)₄ = 0.06225 × 388.12
Mass of Ce(NO₃)₄ = 24.16 gTherefore, 24.16 g of Ce(NO₃)₄ is required to make the solution.
B. Determination of the concentration of the nitrate ion, NO₃¯ in the solution.
In solution, Ce(NO₃)₄ will dissociate as follow:
Ce(NO₃)₄ (aq) —> Ce⁴⁺(aq) + 4NO₃¯(aq)
From the balanced equation above,
1 mole of Ce(NO₃)₄ contains 4 moles of NO₃¯
Therefore,
0.415 M solution of Ce(NO₃)₄ will contain = 0.415 × 4 = 1.66 M NO₃¯
Thus, 1.66 M of the nitrate ion, NO₃¯, is present in the solution.
C. Determination of the new concentration of the Ce(NO₃)₄ solution.
Volume of stock solution (V₁) = 150 mL
Molarity of stock solution (M₁) = 0.415 M
Volume of diluted solution (V₂) = 350 mL
Molarity of diluted solution (M₂) =?
M₁V₁ = M₂V₂0.415 × 150 = M₂ × 350
62.25 = M₂ × 350
Divide both side by 350
M₂ = 62.25 / 350
M₂ = 0.178 MTherefore, the new concentration of the Ce(NO₃)₄ solution is 0.178 M
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An image of Earth's layers is below
What is layer C?
Crust
Mantle
Inner core
Outer core
Answer:
the mantle is layer C.
Explanation:
the crust would be layer A. inner core would be layer D. outer core would be layer B.
ASAP PLEASE!
The speed of light is 2.998 m/s. What is the speed of light in km/hr.
Answer:
10.793 kilometres per hour
What is the mass number for an atom of xenon containing 54 protons and 75 neutrons?
Answer:
Answer should 133
Explanation:
all you have to do is add the protons and neutrons
The mass number for an atom of xenon containing 54 protons and 75 neutrons is 129 amu.
What is an Atomic mass of an atom?The Atomic mass of any atom may be defined as the mass of an atom that is togetherly constituted by protons and neurons in the nucleus of an atom. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number).
The mass number of Xenon is calculated by the following formula:
The Number of neutrons = Mass number - Atomic number.
where, number of neutrons = 75, and number of protons = 54.
75 = Mass number - 54 (number of protons = atomic number).
Mass number = 75 + 54 = 129 amu.
Therefore, the mass number for an atom of xenon containing 54 protons and 75 neutrons is 129 amu.
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Answer the image I took, I’m studying for a test, and this specific question is hard
Answer:
specific question is hard for me too
A student is studying Earth's Layers. She is trying to determine how temperature and density change from one layer to another. Which relationship that exists between Earth's
Sversed the student mostly find
The temperature of Earth's layers decreases with depth while density increases with depth
The temperature of Earth's layers increases with depth while density decreases with depth
The temperature and density of Earth's layers decrease with depth
The temperature and density of Earth's layers increase with depth
Answer:
I believe it is D sorry if I am wrong
Explanation:
Answer:
D.
Explanation:
Explain how changing the amount of greenhouse gases in the atmosphere affects the flow of heat out of Earth's atmosphere.
Explanation:
The added greenhouse gases absorb the heat. They then radiate this heat. Some of the heat will head away from the Earth, some of it will be absorbed by another greenhouse gas molecule, and some of it will wind up back at the planet's surface again. With more greenhouse gases, heat will stick around, warming the planet.
A student wants to know why sandhill crane‘s fly south for the winter. The student uses a map of North America to make a model of the paths sandhill cranes take as they migrate. The student draws lines with arrows to show the routes sandhill cranes are known to take. Which two issues describe limitations of the students models?
Two limitations of the student's models are that the models do not explain why the phenomenon occurs and the models only record the phenomenon in a limited way
Understanding a specific phenomenon requires gathering and analyzing data thoroughly because the researcher needs to collect data that is directly related to the phenomenon and this data needs to be complete and accurate to have reliable conclusions.
In this situation, the student created some models of the routes of the sandhill crane's migration. This data has two main limitations:
It does not answer the question "why?": If the student wants to understand why these birds go to the South, the models are not very useful because they show "how" these birds migrate but not the reason for this migration.It records the migration only in a limited way: For the models to be complete the student needs to record the migration pattern for two years or more, as the pattern might changeBased on this, two limitations of the models are that they do not explain the phenomenon and the data is not complete.
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Continual eruptions occur along mid-ocean ridges, forming new sea-floor rock. The
rocks closest to a mid-ocean ridge are the youngest | oldest. As you move away from
a mid-ocean ridge, the rocks get younger | older. This implies that crust is being
consumed | produced at mid-ocean ridges
The characteristics of the ocean ridges allow finding the results to complete the statements are:
The rocks near the ridge are YOUNGER. While you walk away the rocks are OLDER. This implies that the cortex is PRODUCING in the ridges.
The oceanic ridges are mountain ranges or chains of volcanic mountains at the bottom of the ocean, in these the magma that rises cools and forms young rocks, in they are pushed by the other rocks that emerge, in general they are located on the edges of the tectonic plates .
Therefore, the oceanic ridges are the point where the earth's crust is separating, therefore it has the youngest rocks and in the furthest points it has the oldest.
Let's find the correct words for each phrase to be correct:
The rocks near the ridge are YOUNGER. You walk away the rocks are OLDER. This implies that the cortex is PRODUCING in the ridges.
As a consequence of the characteristics of the ocean ridges, we can find the results to complete the statements are:
The rocks near the ridge are YOUNGER. While you walk away the rocks are OLDER. This implies that the cortex is PRODUCING in the ridges.
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Can somebody please help me do the last part of the paper with the help of the information on top
Answer:
i dont know the answer of this question... im sorry
calculate the boiling point elevation for solution of 25.0 grams of menthol in 130 grams of ethanol. Ethanol boiling point elevation constant is 1.22 oC/m
Answer:
Explanation:
When a solute is added to a solvent, the vapor pressure of the solvent (above the resulting solution) is less than the vapor pressure above the pure solvent. The boiling point of a solution, then, will be greater than the boiling point of the pure solvent because the solution (which has a lower vapor pressure) will need to be heated to a higher temperature in order for the vapor pressure to become equal to the external pressure (i.e., the boiling point).
The boiling point of the solvent above a solution changes as the concentration of the solute in the solution changes (but it does not depend on the identity of either the solvent or the solute(s) particles (kind, size or charge) in the solution).
I cant give you the answer but I hope this helps.
What causes high and low tides on Earth? A. The moon's gravitational pull on Earth causes water to bulge on two sides of Earth.B. Earth's rotation is so fast, water will swell and shrink twice a day.C. Earth is tilted on an axis, causing water to spread unevenly throughout the planet.D. Water swells when tsunamis occur in two areas of Earth at the same time. PLZ HELP FAST
Answer:
A.
The moon's gravitational pull on Earth causes water to bulge on two sides of the Earth.
If a raptor's wingspan were 112 centimeters, how long
would its body have to be for it to have a body-to-
wingspan ratio of 0.45?
Answer:
162.4 cm
Explanation:
please give brainliest award
Help me with this plz
Answer:
EVEN DOE IT TOO LATE, ITS B
Explanation:
PLEASE HELP , 50 points!
Write the electron configuration of a -2 ion with 16 protons.
Answer:
1s^2 2s^2 2p^6 3s^2 3p^6
Explanation:
Number of electrons = Number of protons. Originally, sulfur has 16 protons, but the question asks states 2- ions. So S^(2-), or a total of 18 protons. Follow the rules, and make sure the exponents add up to 18. 2 + 2 + 6 + 2 + 6 = 18 electrons.
Which element has the highest electronegativity and why?
Answer:
See below
Explanation:
Hello there!
Electronegativity is the atom's tendency to attract electrons in a chemical bond
There are two trends to electronegativity:
Electronegativity increases from bottom to top in a group (Li has a greater electronegativity than Fr, for example) Electronegativity increases from left to right across a period (the further right the group, the greater the electronegativity)Looking at a period table, Sb, Sn, Te, and I are all in the same period, so we'll need to decide which element has the highest electronegativity based on the group.
Sn belongs to group 4A (group 14) Sb belongs to group 5A (group 15)Te belongs to group 6A (group 16) I belongs to group 7A (group 17)As I belongs to group 7A, the group that is the farthest right based off of the options given, I has the highest electronegativity
Hope this helps!
describe another medical condition or disease where the primary system causes a serious problem with a secondary system
Answer:
Congestive heart failure
Explanation:
Congestive heart failure happens when your heart gets too weak to pump blood from the lungs out to the body. Pressure builds up in the heart which puts pressure on the blood vessels of the lungs. This will lead to leakage of the vessels and the fluids build up in the air sacs of the lungs. This condition is called pulmonary edema.
Pulmonary edema occurs when fluid builds up in the lungs making it hard to breathe. It may start out as running out of breath easily but if left untreated (both conditions) symptoms get worse over time.
Nadine was cooking a pot of potatoes on the stove. When the potatoes were don’t she needed to remove the potatoes for the water. Which separation technique would be most efficient and effective method for Nadine to use to achieve this
Answer:
boiling
Explanation:
How to create a good statement of the problem?
Write a balanced chemical equation for the standard formation reaction of solid calcium oxide (CaO).
Answer:
2Ca +O2 ----------> 2CaO ( Balanced Reaction)
The balanced chemical equation for the standard formation reaction of solid calcium oxide (CaO) is
Ca + O2 --> CaO2
Heya are balanced equations?A balanced chemical equation is an equation in which the the number of atoms of each elements on both the reactant and products sides are equal.
Calcium oxide is an alkaline which is solid at room temperature and is formed by the reaction of one atom of calcium and two atoms of oxygen.
Therefore, the balanced equation of formation reaction of solid calcium oxide (CaO) is Ca + O2 --> CaO2.
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Using what you know about models, write an explanation from the following prompt
HOPE IT HELPS YOU
CAN YOU BRAINLEST ME
What is the specific heat of a diamond if 4.5 J of heat is required to heat a 0.72 g piece of diamond
from 10°C to 22.3°C?
Answer:
0.51 J/g°C
Explanation:
Which of the following sets of quantum numbers is not allowed?
A.) n=3, l=2, ml=-2
B.) n=4, l=3, ml=-3
C.) n=2, l=1, ml=-1
D.) n=2.5, l=0, ml=0
E.) n=3, l=2, ml=-1
Answer:
D) n = 2.5, ℓ = 0, mℓ = 0
Explanation:
According to the rules governing acceptable quantum numbers, the value for n must be an integer. Therefore, the set {n = 2.5, ℓ = 0, mℓ = 0} is not allowed.
MARKING BRAINLIEST!
Meg ran 100 meters in 7.8 seconds. Linda ran 100 meters in 14.5 seconds. Which statement is correct?
Linda's speed was faster than Meg's speed.
Linda's speed was slower than Meg's speed.
Linda and Meg traveled the same distance at the same rate.
Linda and Meg traveled the same distance over a certain time.
