Flowering plants are the most successful group of land plants. This is due, in part, to the trait that could be the label for point C. in the cladogram. Consider the organization of the cladogram. What trait, besides flowers, is unique to this group of plants?
Answers
Answer:
seeds are protected in fruits in such kind of plants.
Explanation:
The flowering plants are also known as Angiospermae, or Magnoliophyta. Flowering plants are plants that grow flowers. Such plants use seeds to reproduce, or make more plants like them.
Seeds are protected in fruits in such kinds of plants.
Examples of flowering plants are daisies, tulips, oaks, apples.
Answer:
Seeds are protected by a fruit
Explanation:
Related Questions
thylbenzene is heated in a container at 1.5 atm until 20% of the original liquid is evaporated. determine the composition of the vapor and liquid phases and find the operating temperature. (3 pts.)
Answers
When methylbenzene is heated in a container at 1.5 atm until 20% of the original liquid is evaporated, the composition of the vapor and liquid phases can be determined using Raoult's Law. The operating temperature can also be found using the Antoine equation.
First, let's determine the composition of the vapor phase. According to Raoult's Law, the partial pressure of a component in the vapor phase is equal to the mole fraction of that component in the liquid phase multiplied by the vapor pressure of the pure component at the given temperature.
PA = xA PA*
Where PA is the partial pressure of component A in the vapor phase, xA is the mole fraction of component A in the liquid phase, and PA* is the vapor pressure of pure component A at the given temperature.
Since 20% of the original liquid has evaporated, the mole fraction of methylbenzene in the liquid phase is 0.8. The vapor pressure of pure methylbenzene at the given temperature can be found using the Antoine equation:
log10PA* = A - B/(T + C)
Where PA* is the vapor pressure of pure component A at the given temperature, T is the temperature in degrees Celsius, and A, B, and C are constants.
Using the Antoine equation and the values of A, B, and C for methylbenzene, we can solve for the temperature and find the operating temperature.
Once we have the vapor pressure of pure methylbenzene and the mole fraction of methylbenzene in the liquid phase, we can use Raoult's Law to find the partial pressure of methylbenzene in the vapor phase.
The composition of the liquid phase will be 80% methylbenzene and 20% of the other components. The composition of the vapor phase will be the partial pressure of methylbenzene divided by the total pressure (1.5 atm).
Therefore, the composition of the vapor and liquid phases and the operating temperature can be determined using Raoult's Law and the Antoine equation.
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When solute is added to a pure solvent what happens to the freezing point?
Answers
Answer:
The freezing point decreases as the boiling point increases.
Bicycles that have been left outside in the summer will rust faster than bicycles kept inside. What causes the bicycles that are left outside to rust faster?
Bikes that are kept outside are not used as often, speeding up the chemical reaction of metal rusting.
Heat energy from the sun slows down the chemical reaction of the metal rusting.
Moisture and oxygen cause oxidation, which speeds up the chemical reaction of the metal rusting.
Wind energy outside speeds up the chemical reaction of the metal rusting.
Answers
Bikes that are kept outside are not used as often, speeding up the chemical reaction of metal rusting.
Heat energy from the sun slows down the chemical reaction of the metal rusting.
Moisture and oxygen cause oxidation, which speeds up the chemical reaction of the metal rusting.
Wind energy outside speeds up the chemical reaction of the metal rusting.
PLEASE ANSWER!!! TIME LIMITED!!! What are 2 ways electric motors and electric generators are alike?
A. They each transform mechanical energy into electrical energy.
B. They each use an electromagnet.
C. They each include an electrical circuit.
D. They each use a battery as their main power source.
Answers
Answer:b
Explanation:
Both devices work because of electromagnetic induction, which is when a voltage is induced by a changing magnetic field.
Answer:
A
and B
Explanation: hope this helps, pls mark brainliest.
name three states of matter and describe them in terms of kinetic energy
Answers
The states of matter are solids, liquids, and gases.
Basically, there are three states of matter. The matters are stated according to the arrangement of the particles.
The solid is tightly packed and the liquids are not rigid and have more movements in particles. Whereas the gas spreads around and the particles are very flexible.
The best example is when ice(solid) is heated it converts into water (liquid) and if water is boiled it converts into steam (gas).
The kinetic energy in accordance to states of matters are as follows:
Solid does not possess any kinetic energy.liquid has high kinetic energy because it has movements and can travel.gas have the maximum kinetic energy compared to solids and liquids.(The kinetic energy is obtained from the motion of the object)
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Can someone suggest some science and engineering projects for science fair? Either physics or chemistry
Answers
A science project in Chemistry that students can carry out is the construction of an electrochemical cell.
What are science projects?Science projects are projects which are carried out by students as part of their assessment or to improve and enhance their knowledge and ideas about scientific concepts.
A science project in Chemistry that students can carry out is the construction of an electrochemical cell.
An electrochemical cell is a cell that coverts chemical energy to electrical energy.
In conclusion, science projects helps students to develop their own skills in scientific research.
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All the simple machines make work easier to do by changing the _____ or _____ of a force. A. size; type B. work; type C. size; direction D. type; direction
Answers
Answer:
C. size; direction
Explanation:
By definition, a machine is referred to any device that makes work easier. It takes force to do work, hence, work refers to the application of force over a particular distance. A machine aims at making the work easy by changing how it is done. Simple machines, which include: levers, pulleys, inclined planes etc. all carry out the same thing, which is to make work easier, by changing the size/magnitude and direction of the applied force.
A simple machine tends to change the size of the inputted force by increasing it over a shorter distance. The machine increases the force applied better than it can be done manually e.g. a plier and nutcracker increases/changes the applied force better than it can be done with bare hands.
Also, a simple machine can achieve making work easier by changing the direction at which the force is applied. The machine applies the force on the object in an opposite direction or contrary to the way it was manually applied.
1. A chemical change occurs when
Answers
Answer:
A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust. Chemical changes occur through the process of chemical reactions, and the resulting substances have different properties because their atoms and molecules are arranged differently.
Explanation:
Lead exposure con cause all of the following except:
A. Skin burns
B. Kidney damage
C. Brain damage
D. Sterility
Answers
hope this helps you:3
If you are given a piece of rock sugar about 2.5 cm in diameter, describe three steps you can take to dissolve it in a beaker of water in the shortest time.
Answers
Answer:
1. Crush the sugar into powder.
2. Heat the water.
3. Dissolve it by stirring continuously
Explanation:
1. Crushing the sugar into powder increases surface area. So it increases the changes of dissolving
2. Heating the water increases the capacity of water to dissolve sugar.
3. Stirring continuously increases randomness of particles so eases mixing up thus increasing dissolving tendency.
How do you find the molar mass of C2H5OH?
Answers
Molar mass is the mass of one mole of a substance, and is often used in chemistry to calculate the number of moles in a given mass of a substance. To find the molar mass of a substance, we add up the molar masses of each element present in the compound.
In the case of C2H5OH, also known as ethanol, the molar mass can be found by adding up the molar masses of carbon, hydrogen, and oxygen.
First, we know that there are 2 carbon atoms present in the compound. The molar mass of carbon is 12.01 g/mol. So, the mass of 2 carbon atoms is 2 x 12.01 = 24.02 g/mol.
Next, we know that there are 6 hydrogen atoms present in the compound. The molar mass of hydrogen is 1.01 g/mol. So, the mass of 6 hydrogen atoms is 6 x 1.01 = 6.06 g/mol.
Finally, we know that there is 1 oxygen atom present in the compound. The molar mass of oxygen is 16.00 g/mol. So, the mass of 1 oxygen atom is 1 x 16.00 = 16.00 g/mol.
To find the molar mass of the compound, we add up the molar masses of the individual elements. So, the molar mass of C2H5OH is:
24.02 g/mol + 6.06 g/mol + 16.00 g/mol = 46.08 g/mol
Therefore, the molar mass of C2H5OH is 46.08 g/mol.
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Paraphrase this quote, “Sometimes you have to go up really high to understand how small you really are.”
Answers
Answer:
Sometimes you just have to get yourself hard to understand what you are really going through and how much you have done and how hard you are.
Explanation:
Tbh not all quotes are easy to express but this one sounds really interesting.
But in my opinion this is the best I could describe
Hope you agree. Let me know :)
Does cool air push warm air upward?
Answers
Answer:
Cooler, denser air flows in underneath the warmer, less dense air, and pushes the warmer air upward. When this air cools, it becomes more dense than the warmer air beneath it. The cooled air sinks and moves under the warmer air.
Answer
Hot air is less dense than cold air, which is why hot air rises and cold air sinks, according to the United States Department of Energy. Hot and cold air currents power the weather systems on earth. The sun plays a major role in heating the planet, which also creates hot and cold air energy systems. Warm air currents typically bring rain, because they form over oceans. That’s why hurricanes and tropical storms form at sea and eventually move toward land.
The average rate of a reaction is the rate of reaction at any given time.
A) True
B) False
Answers
B) False. The average rate of a reaction is the change in the concentration of a reactant or product over a certain time interval, usually calculated by dividing the change in concentration by the time interval.
It is not the rate of reaction at any given time, but rather an average of the rate of reaction over a certain period of time.
The rate of reaction at any given time is called the instantaneous rate of reaction, and it is calculated by finding the slope of the tangent line to the concentration-time curve at a particular point in time. The instantaneous rate of reaction can change over time as the concentration of reactants and products change, whereas the average rate of reaction remains constant over the time interval for which it is calculated.
Suppose a reaction occurs according to the equation A → B. The rate of this reaction can be expressed as:
Rate = - d[A]/dt = d[B]/dt
where d[A]/dt is the rate of disappearance of A and d[B]/dt is the rate of appearance of B. The negative sign in the equation indicates that the rate of disappearance of A is equal in magnitude but opposite in sign to the rate of appearance of B.
The instantaneous rate of the reaction at a particular time t can be calculated by finding the slope of the tangent line to the concentration-time curve of either A or B at that time. This tangent line represents the rate of reaction at that specific moment in time.
On the other hand, the average rate of the reaction over a certain time interval (t1 to t2) can be calculated by taking the difference in the concentration of A or B at time t2 and time t1, and dividing it by the time interval (t2 - t1):
Average rate = (Δ[A]/Δt)avg = - (Δ[B]/Δt)avg
where (Δ[A]/Δt)avg is the average rate of disappearance of A and (Δ[B]/Δt)avg is the average rate of appearance of B over the time interval.
Therefore, the average rate of a reaction is not the rate of reaction at any given time, but rather an average of the rate of reaction over a certain period of time. The instantaneous rate of reaction, on the other hand, is the rate of reaction at a specific moment in time.
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1
A student is testing a solid material to determine whether it is a pure substance or a mixture.
Which absensation would MOST likely indicate that the material is a mixture!
Answers
Answer:
The material has crystals of two different colors.
a chemical formula that shows the actual number and kinds of atoms present in one molecule of a compound is called
Answers
The chemical formula that shows the actual number and kinds of atoms present in one molecule of a compound is called the molecular formula.
What is the significance of the subscripts in a chemical formula?The subscripts in a chemical formula have significant meaning in determining the actual number and kinds of atoms present in one molecule of a compound. The subscripts represent the ratio of each type of atom in the compound. For example, in the formula H2O, the subscript 2 indicates that there are two hydrogen atoms and the subscript 1 indicates that there is one oxygen atom in each molecule of water. The subscripts are crucial in determining the chemical and physical properties of the compound, such as its molecular weight, reactivity, and boiling and melting points. Understanding the significance of the subscripts in a chemical formula helps to better understand the composition and behavior of a compound.
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Calculate the number of moles of gas that occupy a 16L container at a pressure of 3 atm and a temperature of 48oC
Answers
Answer:
1.81
Explanation:
3*16=n(0.0821)(48+273)
Choose the atom with:
a) Higher first ionization energy
Li and F
b) Larger atomic radius
Na ando
c) Higher electronegativity
Li and F
Answers
Answer:
a )Li
b)O
c)F
Explanation:
a) Li-1s^2 2s^1
F-1s^2 2s^2 2p^5
it is easy to pull out e- from 2p orbit than 2s because 2s orbit is close to nucleus.Therefore Li have high ionisation enthalpy
b)oxygen ion is larger than Na because o have fewer proton
c)F because it requires only 1e to achieve stable noble gas configuration.Therefore to achieve stable nobke gas electonic configuration it accept 1e.
The cycle through which Earth’s ____ change from one type into another over time due to various Earth processes; creates changes in mineral compositions and physical structures
Answers
The cycle through which Earth's "rocks" change from one type into another over time due to various Earth processes; creates changes in mineral compositions and physical structures. This process is known as the rock cycle. The three main types of rocks are igneous, sedimentary, and metamorphic, and they can all transform into one another through various geological processes such as weathering, erosion, melting, cooling, and pressure and heat. The rock cycle plays a critical role in shaping the Earth's surface and geology over long periods of time.
What is the frequency of a photon of light that has an energy of 2.95 × 10−17 J?
Answers
This problem is providing the energy of a photon of light as 2.95 × 10⁻¹⁷ J and it is required to calculate its frequency, according to the electromagnetic spectrum theory. At the end, the answer turns out to be 4.52x10¹⁶ Hz according to the following:
Electromagnetic spectrum:In chemistry, we use the electromagnetic spectrum in order to know how the wavelength, frequency and energy of particles are related to each other. In this particular case, we have a photon and the frequency can be calculated with the following arrangement:
\(E=h\nu\\\\\nu=\frac{E}{h}\)
Whereas E is the energy, h the Planck's constant and ν the frequency. Thus, we plug in these first two to obtain:
\(\nu=\frac{2.95x10^{-17}J}{6.626x10^{-34}J*s}\\\\\nu=4.45x10^{16}s^{-1}=4.45x10^{16}Hz\)
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Which of the following statements correctly describe the procedure for drawing a Lewis structure? (Select all that apply.)
a. A single bond, which represents 2 electrons, should be placed between every two atoms.
b. Nonbonding electrons should be excluded from the Lewis structure.
c. For a neutral molecule the sum of the number of valence electrons for each atom gives the number of electrons used in the Lewis structure. d. Halogen atoms are usually places at the center of the structure.
e. An electron is added to the total count for each negative charge on the species
Answers
The correct statements that describe the procedure for drawing a Lewis structure are:
c. For a neutral molecule, the sum of the number of valence electrons for each atom gives the number of electrons used in the Lewis structure.
e. An electron is added to the total count for each negative charge on the species.
a. This assertion is untrue. If two atoms are joined by a bond, a single bond representing two electrons should be placed between them; however, not every pair of atoms in the Lewis structure must be linked by a connection.
b. This assertion is untrue. Since they increase the number of valence electrons and have an impact on the overall structure, nonbonding electrons, sometimes referred to as lone pairs, should be included in the Lewis structure.
d. This assertion is untrue. Halogen atoms are typically not positioned in the structure's center. The arrangement of formal charges of the atoms in a molecule and their overall electronegativity determine where they are placed in a Lewis structure.
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To draw a Lewis structure, you should place single bonds between atoms, include nonbonding electrons, and use the sum of the valence electrons for a neutral molecule.
Explanation:The correct statements that describe the procedure for drawing a Lewis structure are:
A single bond, which represents 2 electrons, should be placed between every two atoms. This follows the octet rule, where each atom tries to acquire 8 valence electrons. Nonbonding electrons should be included in the Lewis structure. These are the lone pairs of electrons that are not involved in bonding with other atoms. For a neutral molecule, the sum of the number of valence electrons for each atom gives the number of electrons used in the Lewis structure. This ensures that all valence electrons are accounted for.Learn more about Lewis structure here:https://brainly.com/question/34631490
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What is one condition that is necessary for a hurricane to form?
Select one:
Cold ocean water
Warm ocean water
A strong warm front
A strong cold front
Answers
Explanation:
Thunderstorms, warm ocean water and light wind are needed for a hurricane to form (A). Once formed, a hurricane consists of huge rotating rain bands with a center of clear skies called the eye which is surrounded by the fast winds of the eyewall (B).
an alloy is a mixture of elements that has metallic properties.
Answers
True. An alloy is a solid solution consisting of two or more metallic elements, or a metallic element and a non-metallic element.
The properties of an alloy are usually different from those of its constituent elements. The reason for this is that the atoms of different elements in an alloy interact with each other differently than they would if they were in their pure elemental form. This interaction can lead to changes in the electronic and crystal structure of the alloy, which in turn can affect its physical and chemical properties. Some common examples of alloys include brass (copper and zinc), stainless steel (iron, chromium, and nickel), and bronze (copper and tin).
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Complete question:
An alloy is a mixture of elements that has metallic properties. True or False
Which of the following do not contribute to weathering?
A. Rain
2.earthquakes
3. ice
4. wind
Answers
Answer:
Earthquakes
Explanation:
what is the volume of 5 moles of oxygen gas at r.t.p
Answers
= 16/ 24
PLEASE CAN SOMEONE HELP ME PLEASE ! NO FAKE ANSWER PLEASE
Answers
Yes, it is the right response. Although the elements are imaginary, they resemble actual elements .Nomenclature is an organism name system used in biological classification.
What does nomenclature mean?The Latin words nomen (name) and calare (to call) are the source of the word nomenclature. Both the Latin word nomenclatura and the English word nomenclator, which also denotes a source or broadcaster of names, relate to a list of names.
What exactly is nomenclature and how is it crucial?Nomenclature is an organism name system used in biological classification. Genus & species names, two Latinized nouns drawn from numerous sources, serve as indicators of the species whereby the creature belongs.
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What is the density of the block?
Answers
Answer:
1.666
≈ 1.67 g/cm³
Explanation:
Mass = 200g
Length = 6cm
Width = 4cm
Height = 5cm
Density = Mass/ Volume
Volume = length×width×height
\(V = 6 \times4 \times 5 \\ = 120\)
Density =
\( \frac{200}{120} = 1.6\)
Draw the conjugate acid for the following base (lone pairs do not have to be drawn):
Answers
move double bond add line pairs to Oxygen and make negative then move a double bond into the hexagon
PLEASE HELP !!! WILL GIVE BRAINLIEST !!!!
A molecule that has a linear shape has two electron domains around the central atom. How many lone pairs of electrons are present around the central atom? zero one two three
Answers
Answer:
zero
Explanation:
Benedict College E360 xG The number of second o x The cis isomer of the 1.3-diethyl cyclobutane is: CHyCH2 CH CH CH CHy CH CHs OA ?? oc Which is more stable,cis-1-ethyl-3-methylcyclohexane or trons-1-ethyl-3-methylcyclohexane? O cis trans The number of second degree (2") hydrogens in the structure below is ViewSonic
Answers
A cyclic diallylamine called 1-ethyl-3-methylcyclohexane is a feedstock used to create methicillin-resistant Staphylococcus aureus (MRSA).
Describe trons-1-ethyl-3-methylcyclohexane or methylcyclohexane.An organic substance with the chemical formula CH3C6H11 is methylcyclohexane. It is a white liquid with a little odor that is categorized as a saturated hydrocarbon.As a solvent, methylcyclohexane is employed. Toluene is the principal product of its conversion in naphtha reformers. [4] Some correction fluids (like White-Out) also use methylcyclohexane as a solvent.Because one methyl group is attached to one carbon of the cyclohexane ring, methylcyclohexane is a monosubstituted cyclohexane.This monosubstituted methylcyclohexane has the lowest energy form when the methyl group is located equatorially as opposed to axially.The idea of A value embodies this equilibrium. Because there are axial hydrogen atoms on the same side of the ring while the methyl group is in the axial position, there is steric crowding (steric strain) experienced by the methyl group (known as the 1,3-diaxial interactions).To know more about methylcyclohexane visit:
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