The rock layer which marks the end of the dinosaurs is: C. KT Boundary layer.
A rock can be defined as a solid material containing minerals, which are naturally formed through the following processes:
Weathering. Plate tectonic activity. Erosion.Basically, a rock comprises of various layers which marks the age of both living and nonliving organisms, these includes:
I. Burgess Shale layer.
II. Mesozoic Layer.
III. KT Boundary layer.
Dinosaurs refers to a taxa of carnivorous or herbivorous archosaurian reptiles that are often very large and belongs to the Mesozoic era.
Basically, the Mesozoic Layer is a rock layer which marks the period when dinosaurs were still roaming the earth some million years ago.
However, dinosaurs went into extinction at the KT Boundary layer and as such it is a rock layer which marks the end of the dinosaurs.
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Why is the nitrogen group considered a mixed group?
Explanation:
The nitrogen group is considered mixed because it is composed of elements of equally different classifications of metal, non-metal, and metalloids. The group contains the nonmetals nitrogen (N), and phosphorus (P), the metalloids arsenic (As) and antimony (Sb), and the metals bismuth (Bi) and Moscovium (Mc).
In periodic table, metal, nonmetal and metalloids are mixed in group is know to be mixed group. Nitrogen group is mixed.
Define periodic table?
The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number. There are five parts in periodic table Component Groups, Ionic Bonds, element periods, and so forth, ionic bonds and Bonds made of metal.
The nitrogen group is said to be mixed because it is contains metal, nonmetal and metalloids. Elements can be classified into metal, non-metal, and metalloids. Nitrogen group mixed group contains the nonmetals nitrogen (N), and phosphorus (P), the metalloids arsenic (As) and antimony (Sb), and the metals bismuth (Bi).
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does iron and lead oxide react vigorously
Answer:
Fe will displace On but no the reaction is not vigorous.
write a brief description explaining the term "luminous" to a classmate
Answer:
Plz mark as brainlist
luminous is relating to light as it is perceived by the eye, rather than in terms of its actual energy.
A brief description explaining the term "luminous" to generating or reflecting brilliant light, particularly at night: luminous attire. The bright glow of laptops illuminated the library.
What is luminous ?Luminous objects are things like the sun that produce or radiate light on their own. Others include a torch, an electric lamp, etc. Non-bright objects are those that don't emit any light of their own and can only be seen when light from a luminous source reflects off of them. Moon, a chair, a painting, etc. are a few examples.
Luminous objects are defined as those that produce their own light. Just the sun emits its own light; all other things only reflect light that is incident upon them.
The presence of luminous items produces the feeling of light. These things are visible because they independently emit light. As an illustration, consider the Sun, the stars, lightbulbs, torches, tube lights, candles, and so on.
Thus,the term "luminous" to generating or reflecting brilliant light, particularly at night: luminous attire. The bright glow of laptops illuminated the library.
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Calculate the average atomic mass for the element beryllium, given this information about the
relative abundance of its 3 isotopes.
Be-8 = 0.2% Be-9 = 98.9% Be-10 = 0.9%. Please show all your work.
Answer: 9.007
Explanation:
Be-8 8 x 0.20% = 0.016
Be-9 9 x 98.90% = 8.901
Be-10 10 x 0.90% = 0.09
100.00% 9.007
what is the colour change when universal indicator is added to apple juice
Answer:
red because its the flavor
Explanation:
complete and balance the equation pb3o4+hcl
ur so ok.
Explanation:
i need points ok.
thanks
Which two statements describe a mixture?
O A. It is a pure substance.
O B. It includes atoms of different elements.
O C. Its parts can be separated using physical means.
O D. It can result from chemical bonding.
Answer:
d
Explanation:
because the chemicals or substances mix together so it's basically like chemical bonding.
What is the difference between variable and fixed costs?
Answer:
Variable costs are costs that change depending on the amount of the product you are providing. Fixed costs On the other hand are costs that are the same no matter how much of the product or service you are providing. Fixed costs are also called overhead or fixed operating costs.
_________________________________
[tex]\boxed {\sf Variable \:costs:-}[/tex]
The materials for making the bracelet are a variable cost, because the amount of materials you buy changes depending on how many bracelets you are making.
[tex]\boxed {\sf Fixed \:costs:-}[/tex]
If you pay rent for a warehouse each month, the amount you pay in rent is the same each month. It doesn't go up or down depending on how many sales you make.
[tex]\boxed {\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:}[/tex]
write the relation between group number and electronic configration
Answer:
Explanation: the number of circles in the electronic configuration of an element is represented in the periodic table as the period number that element is situated in. the number of electrons in the outermost shell of an element is represented in the periodic table as the group number that element is situated in.
Determine whether each of the following reactions is spontaneous.
AHsystem = -75.9 kJ, T = 273 K,
ASsystem = 138 JIK
Answer:
gxibdkkzvsosvjzkxvdkbdsibsisbdkbslabdldvslbskskd
How is thermal energy transferred by convection, conduction, and radiation?
Answer:
Radiation is responsible for most of the heat transferred into the room. Heat transfer also occurs through conduction into the room, but at a much slower rate. Heat transfer by convection also occurs through cold air entering the room around windows and hot air leaving the room by rising up the chimney.
When a fluid, such as air or a liquid, is heated and then travels away from the source, it carries the thermal energy along. This type of heat transfer is called convection. The fluid above a hot surface expands, becomes less dense, and rises. ... A space heater is a classic convection example.
Can someone tell me the answers
Answer:
cadmium- Cd,
physical state= solid at room temperature
Manganese- Mn
physical state= solid at room temperature
Answer:
Cd
cadmium
112.41
transition metal
Mn
manganese
54.94
transition metal
Rn
radon
222.02
noble gas
nono noonobbvyubojikkhbjhbjhb mj bk n
plz solve and send photo of anwer plz I need it fast
PLZ HELP ASAP! Select 3 examples of pure substances Nitrogen gas, A cheeseburger, Ocean water, A glass of sweet tea, Oxygen
Answer:
nitrogen gas, oxygen, and ocean water
Hope it helps!
Explanation:
Answer: Nitrogen Gas, Oxygen, Ocean water
Explanation:.yes
Use the following image to answer the following questions. A student was performing an experiment using two identical cups made of styrofoam. The student had Cup A holding water at 90℃ and Cup B holding water at 20℃. The student then put an Aluminum Bar into each cup that was touching the water. As time passed, the student noticed that the temperature of the water in Cup A and Cup B began to change. Question:
A. Predict what will happen to the temperature of the water in Cup A and Cup B after 1 hour has passed. (1 point)
B. Explain and give evidence for what type of heat transfer is occurring between the 2 cups.
In cup A, the temperature of the water will drop after 1 hour and the temperature of the aluminium will rise. In cup B, there will be no change in temperature of the water and the aluminium. The type of heat transfer taking is conduction.
When two bodies at different temperatures come into contact which other. Heat is transferred from the hotter body to the cooler body until thermal equilibrium is achieved between the two bodies. The temperature of the water decreases while that of the aluminium bar rises.
The aluminium bars were put into the two cups holding water at 90℃ and 20℃ respectively. Since the water in cup A is at a higher temperature than the aluminium, heat is transferred from the water to the aluminium bar until thermal equilibrium is achieved.
In cup B, there is no temperature difference between the water and aluminum hence no heat transfer occurs. Note that a mode of heat transfer that depends on temperature difference between two bodies in contact is conduction.
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What neutral element has 17 electrons an 18 neutrons?
Answer:
chlorine atom
A chlorine atom has 17 protons, 18 neutrons, and 17 electrons.
Explanation:
Answer:
chlorine atom
Explanation:
A chlorine atom has 17 protons, 18 neutrons, and 17 electrons.
How do the metals in group 1 compare with the transition metals? List at least 3 points.
When solid sodium hydroxide is dissolved in water,the temperature of the soution formed rapidly increases. a) compare the total energy of the solid NaOH with that of the solution and state which is greater.
Answer: In a perfectly isolated system, the total energy is the same.
Explanation: The conservation laws for mass and energy hold in a system that is isolated from its surroundings. The enegy released by the dissolution of solid NaOH in water is absorbed by the water. So the total energy of the syetm remains the same. It is simply converted from lattice energy of the NaOH into heat energy as measured by the temperature of the water. As long as it is operfectly isolated, the total energy remains the same.
Which term best describes the relationship between mass and volume of a substance?
(3 Points)
Density
Solubility
Specific Heat
Melting Point
Answer: Density
Explanation:
Density = (mass)/(volume)
QUESTION 5
A. Aluminum carbonate
(03.04 LC)
Match the formula to the correct name.
Al2O3
e Al(HCO3)3
Al2(CO3)3
B. Aluminum oxide
C. Aluminum bicarbonate
QUESTION A
The chemical formula of aluminium carbonate is written as Al2(CO3)3.
The chemical formula of a compound is a representation of the atoms that compose the compound. Usually, the chemical formula is derived from the name of the compound.
We know that the carbonate ion is CO3^2- while the aluminium ion is Al^3+. It follows that the compound, aluminium carbonate ought to have the formula, Al2(CO3)3. The compound aluminum oxide has the formula Al2O3 while the compound aluminum bicarbonate has the formula Al(HCO3)3.
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Which pair of diseases could both be treated effectively with antibiotics
A. athletes foot and flu
B. cholera and salmonella
C. flu and scurvy
D. malaria and rickets
Imma mark the correct answer brainliest
Answer:
cholera and salmonella
Explanation:
i believe so
A front is a boundary between two _________ ________. *
A. Bodies of land
B. Bodies of water
C. Air masses
D. Cloud sides
Answer:
C. Air massesExplaination :depending on the air masses involved and which way the fronts move, fronts can be either warm, cold, stationary, or occluded.
Cual es la fórmula del anhidrido fosfórico ?
P₂O₅
English-
the formula to phosphoric anhydride is P₂O₅
Spanish-
la fórmula del anhídrido fosfórico es P₂O₅
Why do airplanes have the cruising altitude in the stratosphere?
I'll be eternally grateful to whoever can help me!
Each of these Ionic Compounds are named INCORRECTLY.
1. Find and describe the mistake
2. Correctly name the compound.
CaCl2 - Calcium Chlorine
CuS - Copper Sulfide
Li3P - Trilithium Phosphide
CuBr - Copper(II) Bromide
NaOH - Sodium Hydrogen Oxide
Explanation:
The nomenclature of ionic compounds is given by:
1. Positive is written first. And if the metal atom has various oxidation states then its oxidation state is to be mentioned in brackets with help of roman numbers
2. The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.
1.) : Calcium chloride (Correct)
In the given compound, calcium has oxidation state of +2 and chlorine has oxidation state of -1.The name is correct.
2.) : Copper (II) oxide (Incorrect)
In the given compound,copper has the oxidation state of +1 and oxygen has oxidation state of -2.So ,the correct name will be Copper (I) oxide.
3.) : Lead (II) sulfide (Incorrect)
In the given compound, lead has the oxidation state of +4 and sulfur has oxidation state of -2. So ,the correct name will be Lead (IV) sulfide.
If you have 460 grams of H2o, how many molecules are present?
Would a candle burning be a chemical or physical change? Why?
Theoretical yield of NaHCO3 = Na + H2O + CO + CO2
Answer:
C - 2 e- → C
Explanation:
2 NaHCO3 → 2 Na + H2O + -1 CO + 3 CO2
2 NaI + 2 e- → 2 Na0
C - 2e - C