Answer:
rubidium is your answer for this question
Scientists are unable to research the organs, tissues, and cells of early organisms as these parts are rarely fossilized. Which is one reason for the lack of these fossilized parts?
Answer:
A. These parts quickly decompose.
Explanation: This is because organs are made of tissues that decompose more quickly than bone. Animals mainly eat the organs and tissues of another, not the bones. This results in quick destruction of these parts that are left behind.
Have a blessed day/night! Please mark brainliest if correct! <3
The reason for the lack of these fossilized parts is that these part quickly decompose. Hence option A is correct.
What is fossilization?Fossilization is defined as the mechanisms that are physical, chemical, and biological that result in the long-term preservation of plant and animal remnants. Fossilization is a negative representation of the creature preserved in the substrate as a fossil. Any preserved remains, impression, or trace of a once-living thing from a previous geological age is referred to as a fossil.
Decomposition is defined as the method through which decomposing organic matter yields more basic organic or inorganic elements . The process of recycling nutrients that have been consumed by an organism to create its body begins with decomposition. It is the process through which the dead tissues disintegrate and change into more basic organic forms.
Thus, the reason for the lack of these fossilized parts is that these part quickly decompose. Hence option A is correct.
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What can scientists learn by studying fossils? I HAVE ANSWER
It is all of them.
how the Earth's climate has changed over time
how species have changed over time
the appearance of an organism and its structures
how the Earth's surface has changed over time
Answer:
dweyflgyegfuyegfyegrygeyrgyr8ogeyurkgevyrujfryujftewy
Explanation:
jk b or e
What is true about matter?
A. Matter has mass and takes up space.
B. Matter has mass but does not take up space.
O C. Matter takes up space but does not have mass.
O
D. Matter does not have mass or take up space.
Answer:
A
Explanation:
Matter is always anything that can take up space and in order for something you can touch (matter is tangible) It has to have mass.
Which statement best describes how an electromagnetic motor works?
Electrons are moved through a magnet, creating a circuit. That circuit interacts with a current, moving the
conductor in the orientation of the field
Electrons are moved through a current, creating a circuit. That circuit interacts with a magnet, moving the
conductor in the onentation of the field.
Elections are moved through a circuit, creating a current That current interacts with a magnet, moving the
conductor in the orientation of the field
Electrons are moved through a magnet creating a current. That current interacts with a circuit, moving the
conductor in the onentation of the field
Answer:
electrons are moved through a magnet creating a current. the current instracts with a circuit, moving the conductor in the onentation of the field
when energy transforms, which of the following does it produce?
A. heat
B. light
C. sound
D. motion
motion
Explanation:
it works in our daily life
Psychology **
Richard often has hallucinations of his father who has passed away and has delusions that he is under constant government surveillance. What
is Richard likely to be suffering from?
A anxiety disorder
OB. personality disorder
OC, mood disorders
OD
schizophrenia
Answer:
D
Explanation:
the color of a mineral streak is often different than its color true or false
Please do not ignore, I don’t know how to find the last part so can you please explain it to me? I’m having trouble with that
Answer:
Neutral
Explanation:
U need to count the number of protons and electrons and see which has more...
Here the atom is neutral cause the electrons and protons are equal and cancell each other out.
I hope im right!!
Answer:
To find the overall charge subtract electrons from protons
So in this example its 0
Explanation:
4 Protons
4 electrons
so basically
+4-4=0
Grasses living in an area have shallow but widespread roots that grab
the ground. They can grow their leaves fast even after losing them.
What can we say about these plants?
What is the meaning of matter?
Answer:
Explanation:
physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.
Answer:
Anything that takes up space.
Explanation:
Anything that has both volume and mass.
camouflage
2. chemical warfare
3. commensalism
4. indicator species
5. interspecific competition
a relationship in which one
organism lives in or on another organism
and benefits from that relationship while
the host organism is harmed by it
those species that normally live
and thrive in a particular community
species that play critical roles in
their communities and help determine
the types and numbers of other species
in a community
association in which one organism
is benefited and the other organism is
neither benefited nor harmed
20
species that serve as early
warnings of damage to a community or
ecosystem
competition between species for
shared or limited resources
using chemical substances to kill or
injure predator or prey
species that migrate or are
deliberately introduced into a community
where they would not normally live
a relationship between two kinds
of organisms that benefits both
blending in with one's
surroundings
an adaptation in which an animalis
protected against predators by its
6. invasive
7. keystone species
8. mimicry
9. mutualism
10. native species
11 parasitism
Where is the main asteroid belt in the solar system?
Answer:
It's between Jupiter and Mars.Complete the table with the mass number, number of protons, number of neutrons, and number of electrons for the elements shown.
Answer:
Explanation:
The Proton number for flourine will be 9
Then the mass number which will be protons+ neutrons will be 19
Argon which has a mass number of 40
to find the proton number of argon it will be 40-22=18
then the electron number will just be the same as proton number
then calcium the proton will be the same as electron so it will be 20
then neutrons will be mass number -proton number
which is 21
hope this helped
and pretty cool you use a mac
Question 3 (0.05 points)
Fixed metals are metals in representative elements, plus three metals in transition
elements: Zn, Ag, Cd. Variable metals are metals in transition elements, except Zn,
Ag, and Cd. What is the different between the names of ionic compounds containing
fixed metal and those containing variable metals?
A) Ionic compounds containing variable metals should have Roman numerals
CD B) lonic compounds containing fixed metals should have prefixes
C) lonic compounds containing fixed metals should have Roman numerals
Pleaseeeeeee helppppppp
Answer:
A) Ionic compounds containing variable metals should have Roman numerals
Explanation:
The correct option is;
A) Ionic compounds containing variable metals should have Roman numerals
This is because these variable metals have variable oxidation states and charges. Hence, to be able to distinguish between compounds containing the same element but different charges, the roman numerals is used. For example;
FeCl₃ - Iron(III) Chloride
FeCl₂ - Iron(II) Chloride
What causes the convection cell to turn left at point B?
P.S: This is for my science notes so try and make it a little simple thx
Answer:
Point B is in Between two convection, and is just below a ridge . This cause the cell to turn left because the flow of fluid hits the bottom of the crust this is the best I can do to Help you understand.
A nickel is placed in a cup of boiling water. Predict whether a solution will form.
I really don’t know
Clarifying Questions:
1. Why do solid covalent compounds ( molecules) have low melting points?
2. Why do solid ionic compounds (ions) have high melting points ?
3. How are carbon tetrachloride and sodium chloride different from each other?
Please help ASAP
Problem 1
The text (from the screenshot you posted) mentions that
"The atoms of covalent materials are bound tightly to each other in stable molecules, but those molecules are generally not very strongly attracted to other molecules in the material"
Put another way, we can think of each atom as a person, and each molecule as a family or a collection of persons. This is because any molecule is a collection of atoms. In covalent molecules, the connection between any two families isn't that strong since each person is focused more on their respective family, instead of other people outside the family. This is one way to think of it, but you may have a more effective way to remember.
In short, the exterior bonds between different covalent molecules isn't that strong, which means it's easier to break those bonds.
======================================================
Problem 2
The text also says
"The atoms (ions) in ionic materials show strong attractions to other ions in their vicinity"
This is due to the positively and negatively charged ions that attract to one another, and this causes a stronger chain so to speak. The stronger the chain, the harder it is to break when you apply temperature to it. Keep in mind that the only difference between a solid and a liquid is that the solid is a rigid structure while a liquid is more loose and free flowing. The ionic materials having a stronger inner bond like this is why ionic materials have higher melting points. You need to apply more temperature than normal to get the solid to melt.
======================================================
Problem 3
Again we turn to the text and it says
"For example, the molecule carbon tetrachloride is a non-polar covalent molecule, CCl4. It's melting point is -23 degrees Celsius. By contrast, the ionic solid NaCl has a melting point of 800 degrees Celsius"
In short, the difference between the two is that carbon tetrachloride has covalent bonds and NaCl (sodium chloride, aka table salt) has ionic bonds. It's much easier to melt the carbon tetrachloride than it is to melt the table salt.
Side note: carbon tetrachloride was historically used in fire extinguishers, but have been phased out due to safety concerns. Exposure to this toxin can lead to central nervous system problems, kidney failure, or liver problems. Due to its very low melting point, carbon tetrachloride is a liquid at STP.
1. Covalent compounds are held together by weak intermolecular forces. It is because of such weaker forces, which fails to make the compound bind tightly. Since lower heat (energy) is capable of breaking these weak intermolecular forces, therefore the melting and boiling points of covalent compounds is low.
2. Ionic compounds are held together by electrostatic forces between the oppositely charged ions . As the ionic lattice contains such a large number of ions, a lot of energy is needed to overcome this ionic bonding so ionic compounds have high melting and boiling points.
3. In terms of chemical bonding, carbon tetrachloride is a covalent chemical compound whereas sodium chloride is an ionic chemical compound. NaCl is solid in nature while CCl₄ is liquid.
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This person is fishing in a small, freshwater body of water. This body of water flows into a larger body of water called a river. What is this small body of freshwater called?
Answer:
Explanation:
The smallest body of water is the brook, a natural stream of water that is found aboveground and is often called a creek as well. A brook is usually a tributary (a small body of water that naturally flows into a large one) of a river, but this is not always the case.
Answer:
pond
Explanation:
Write the formula of the conjugate base of the Brønsted-Lowry acic, HF
Answer:
Furthermore, because hydrofluoric acid, HF, loses a proton, H+1, to generate its conjugate in the reaction that is shown above, this reactant can be classified as a Brønsted-Lowry acid, and, consequently, the fluoride ion, F–1, is the conjugate base of this acid.
Explanation:
hope this helps
The formula of the conjugate base of the Bronsted-Lowry acid, HF is represented as F⁻.
What is the Bronsted-Lowry concept?The Bronsted-Lowry theory can be described as an acid-base reaction where acid and base react with each other and by an exchange of proton acid, produces its conjugate base and the base creates its conjugate acid.
The Bronsted-Lowry concept is actually an extended version of Arrhenius's theory of acid base. According to the Bronsted-Lowry concept, acid is a substance that donates a hydrogen ion or a proton and forms its conjugate base and the base is a substance that accepts proton and produces its conjugate acid.
Bronsted-Lowry acid can be represented as:
Acid ⇄ Conjugate base + H⁺
The conjugate base of Bronsted-Lowry acid HF can be represented as follows:
HF ⇄ F⁻ + H⁺
Therefore, fluoride ion F⁻ is the conjugate base of the Bronsted-Lowry acid HF.
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Which of the following best describes the outcome of the cell division process meoisis?
Select one:
A. Meosis does not occur in reproductive cells.
B. The cells produced at the end of meiosis are genetically identical to the parent cell.
C. The cells produced at the end of meiosis contain half the number of chromosomes as the parent cell.
D. Cells only divide once during meiosis.
Answer:
Explanation: The answer is B. Because meiosis process produce genetically different, haploid cells. Also, meiosis basically happen to produce gametes. Gametes is haploid. So, the answer is B
Meiosis is a method for cell division taking place in some organisms. In meiosis the cell the cells produced at the end of meiosis contain half the number of chromosomes as the parent cell. Hence, option C is correct.
What is meiosis?meiosis is biological process by which the cell undergo division to produce genetically identical daughter cells. Other methods of cell divisions include mitosis, binary division, budding etc.
The first stage of meiosis includes pairing homologous chromosomes and they segregate to opposite ends of the meiotic spindle.This phase is known as reduction division where, the number of chromosome reduces to half.
This differentiated chromatids separates out in the second phase and yielding the haploid cells. Hence, in meiosis, the cells produced at the end of meiosis contain half the number of chromosomes as the parent cell.
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HELPHELPHELPHELPHELPHELPHELPHELPHELPHELPHELPHELPHELPHELPHELP
Answer:
Explanation:
In all, an estimated 8,000 to 10,000 Iraqi forces were killed, in comparison with only 300 coalition troops. Though the Gulf War was recognized as a decisive victory for the coalition, Kuwait and Iraq suffered enormous damage, and Saddam Hussein was not forced from power.
hope this helps a lot!
Body Color is a ___________
Variation
Trait
Feature
Observation
A chemist prepares a solution of silver(I) perchlorate by measuring out of silver(I) perchlorate into a volumetric flask and filling the flask to the mark with water. Calculate the concentration in of the chemist's silver(I) perchlorate solution. Be sure your answer has the correct number of significant digits.
The question is incomplete, the complete question is;
A chemist prepares a solution of silver (I) perchlorate (AgCIO4) by measuring out 134.g of silver (I) perchlorate into a 50.ml volumetric flask and filling the flask to the mark with water. calculate the concentration in mol/L of the silver (I) perchlorate solution. Round your answer to 2 significant digits.
Answer:
13 mol/L
Explanation:
We must first obtain the number of moles of silver I perchlorate involved
Molar mass of silver I perchlorate = 207.32 g/mol
Number of moles of silver I perchlorate = 134g/207.32 g/mol = 0.646 moles
Recall that;
n =CV
C= concentration
V= volume
n = number of moles
C = n/V
C = 0.646 moles * 1000/50
C = 13 mol/L
Suppose the reduction of nitric oxide proceeds by the following mechanism:
step elementary reaction rate constant
(g)
(g)
(g)
(g)
(g)
(g)
(g)
(g)
Suppose also
≫
. That is, the first step is much faster than the second.
Answer:
vgj I'll all all all
Explanation:
gghjjhhjjjjjjjj nnh
14) Propane, C3H8, is a hydrocarbon that is commonly used as fuel for cooking.
a) Write a balanced equation for the complete combustion of propane gas, which yields CO2(g) and
H2O(l).
b) If 10.0 g of propane undergo combustion, how many moles of oxygen will be consumed?
c) Assuming that air is 21.0 percent O2 by volume, calculate the volume of air needed to completely
combust 10.0 g of propane at 30oC and 1 atm
d) If the combustion of propane produces 2220 kJ/mole, how much energy is produced when 30.0 g
of propane undergoes complete combustion?
e) If the process described in d) above occurs in a calorimeter containing 8.25 kg of water, calculate
the change in temperature of the water that would be observed.
What is the definition of energy (in scientific terms)?
A. The motion of an object
B. The ability to do work
C. A force used on an object
D. A change in temperature
Whose atomic theory explains how atoms emit (release) and absorb light?
O Bohr's
O Dalton's
O Rutherford's
O Thomson's
Answer:
Bohr's model of hydrogen atom
I hope this answer is correct
Answer:
Bohr's
Explanation:
What is the final concentration when 5 ml of a 2.5M copper sulphate solution is diluted to 750 ml?
Answer: The final concentration when 5 ml of a 2.5M copper sulphate solution is diluted to 750 ml is 0.017 M
Explanation:
According to the dilution law,
[tex]M_1V_1=M_2V_2[/tex]
where,
[tex]M_1[/tex] = molarity of stock [tex]CuSO_4[/tex] solution = 2.5 M
[tex]V_1[/tex] = volume of stock [tex]CuSO_4[/tex]solution = 5 ml
[tex]M_1[/tex] = molarity of diluted [tex]CuSO_4[/tex] solution = ?
[tex]V_1[/tex] = volume of diluted [tex]CuSO_4[/tex] solution = 750 ml
Putting in the values we get:
[tex]2.5\times 5=M_2\times 750[/tex]
[tex]M_2=0.017[/tex]
Therefore the final concentration when 5 ml of a 2.5M copper sulphate solution is diluted to 750 ml is 0.017 M
Help plzzz I don’t get to
What is berylium phosphide anion?
Answer:
Molecular Formula, Be3P2. Synonyms. Beryllium phosphide. Beryllium phosphide (BeP2). EINECS 261-137-1. 57620-29-8. 58127-61-0. Molecular Weight.
Molecular Formula: Be3P2
Molecular Weight: 88.98407 g/mol
Structure: Find Similar Structures
PubChem CID: 6453515
Explanation: