Answer:
A. it contains a lot of matter
Which of the following is least likely to change the gene pool of a population of chipmunks?
A pesticide poisons and kills a large number of chipmunks.
A group of chipmunks moves to a new habitat.
A number of chipmunks die due to old age.
A genetic mutation causes some of the chipmunks to have larger eyes.
Answer:
I would say that old age because nothing is affecting the gene pool by dying of old age.
Explanation:
Hope this helps.
Among the following, one which is least likely to change the gene pool of a population of chipmunks is "A number of chipmunks die due to old age".
What is gene pool?Reference to the combination of all the genes (including alleles) present in a reproducing population or species is called as a gene pool.
Evolution can change the composition of a population's gene pool over time. This can occur by a variety of mechanisms, including mutations, natural selection, and genetic drift. The result is a gene pool that is altered to be attuned to the needs of the population's specific environment.
Given options are-
A pesticide poisons and kills a large number of chipmunks.
A group of chipmunks moves to a new habitat.
A number of chipmunks die due to old age.
A genetic mutation causes some of the chipmunks to have larger eyes.
Therefore, Among the following, one which is least likely to change the gene pool of a population of chipmunks is "A number of chipmunks die due to old age".
To learn more about evolution click:
https://brainly.com/question/13492988
#SPJ5
A student with a body temperature of 37°C holds a piece of ice that has a temperature of –8°C.
Which statement best explains what happens?
A.Heat transfers coldness from the ice to the student's hand. B.Heat transfers thermal energy from the student's hand to the ice. C.Thermal energy transfers heat from the student's hand to the ice. D.Thermal energy transfers coldness from the student's hand to the ice.
plzz hurry
Answer:
B
Explanation:
Heat moves as thermal energy from hot body to a cold body
don't forget to rate answer
Please help ASAP I’ll make you as brainlister
Answer:
Iridium (II) oxygen
Sorry if I'm wrong, it could be Iridium (I) oxygen, but the higher chance is Iridium (II) oxygen.
which of the following could not form an ionic compound? check all that apply
An ionic bond is formed between a metal ion a nonmetal ion hence Li^+ and Cl^- will form an ionic bond.
An ionic bond is formed between two ions, a metal ion(cation) and a nonmetal ion (anion). The ionic compound is therefore an ion pair because the ions are held together by electrostatic attractions to each other.
Since an ionic bond is formed between a metal ion a nonmetal ion, the following will form an ionic bond;
Li^+ and Cl^-Mg^2+ and S^2-Learn more: https://brainly.com/question/9743981
1.)A photon has a wavelength of 1.95 x10^-11 m. What is the frequency?
a.)Using your answer, find the energy of that photon
Explanation:
Given parameters:
Wavelength of photon = 1.95 x 10⁻¹¹m
Unknown:
Frequency of the wave = ?
Energy of the photon = ?
Solution:
The frequency and wavelength of a wave are related by the expression;
C = Fλ
C = speed of light = 3 x 10⁸m/s
F = frequency
λ = wavelength
Insert the parameters and solve;
3 x 10⁸ = F x 1.95 x 10⁻¹¹
F = [tex]\frac{3 x 10^{8} }{1.95 x 10^{-11} }[/tex] = 1.54 x 10¹⁹Hz
Energy of the photon is related to frequency using the expression below;
E = hF
h is the Planck's constant = 6.634 x 10⁻³⁴m²kg/s
Insert the parameters and solve;
E = 6.634 x 10⁻³⁴ x 1.54 x 10¹⁹ = 1.02 x 10⁻¹⁴J
4. The nucleus of an atom is positively charged due to
A. electrons b. neutrons C. proton D. Ion
Answer:
Protons
Explanation:
Electrons have a negative charge which are found in shells around the nucleus. The nucleus consists of protons and neutron and the neutron has a neutral charge.
A 25.00 ml solution containing 0.033 M sodium acetate is titrated with a 0.098 M solution of HCl. How mar
milliliters of HCl are required to reach the endpoint?
Answer:
[tex]8.42\ \text{mL}[/tex]
Explanation:
When the endpoint is reached the millimoles of sodium acetate and HCl will be equal.
[tex]\text{Volume of sodium acetate}=25\ \text{mL}[/tex]
[tex]\text{Molarity of sodium acetate}=0.033M[/tex]
[tex]\text{Molarity of HCl}=0.098M[/tex]
[tex]\text{Millimoles of sodium acetate}=25\times 0.033=0.825\ \text{mmol}[/tex]
Let [tex]V=\text{Volume of HCl}[/tex]
[tex]\text{Millimoles of HCl}=0.098V[/tex]
At end point the millimoles will be equal to that of sodium acetate
[tex]0.825=0.098V\\\Rightarrow V=\dfrac{0.825}{0.098}\\\Rightarrow V=8.42\ \text{mL}[/tex]
The volume of HCl required is [tex]8.42\ \text{mL}[/tex].
The volume of HCl required to required to reach endpoint is 8.42 mL
From the question,
We are to determine the volume of HCl required to reach endpoint
First, we will write a balanced chemical equation for the reaction.
The balanced chemical equation for the reaction is
CH₃COONa + HCl → CH₃COOH + NaCl
This means
1 mole of sodium acetate is required to completely neutralize 1 mole of HCl
Now, we will determine the number of moles of sodium acetate present
Using the formula
Number of moles = Concentration × Volume
Concentration of sodium acetate = 0.033 M
Volume of sodium acetate = 25.00 mL = 0.025 L
∴ Number of moles of sodium acetate present = 0.033 × 0.025
Number of moles of sodium acetate present = 0.000825 mole
Now,
Since, 1 mole of sodium acetate is required to completely neutralize 1 mole of HCl
Then,
0.000825 mole of sodium acetate would be required to completely neutralize 0.000825 mole of HCl
∴ The number of moles of HCl needed is 0.000825 mole
Now, for the volume of 0.098 M HCl required to reach endpoint
Using the formula
[tex]Volume = \frac{Number\ of\ moles}{Concentration}[/tex]
∴ Volume of HCl required to required to reach endpoint = [tex]\frac{0.000825}{0.098}[/tex]
Volume of HCl required to required to reach endpoint = 0.008418367 L
Volume of HCl required to required to reach endpoint = 8.418367 mL
Volume of HCl required to required to reach endpoint ≅ 8.42 mL
Hence, the volume of HCl required to required to reach endpoint is 8.42 mL
Learn more here: https://brainly.com/question/9698827
Two or more elements or compounds combine to make one complex substance
Answer:
Synthesis reaction
Explanation:
Two or more elements or compounds combining to make one complex substance occurs in a synthesis reaction.
A synthesis or combination reaction is one that involves the formation of a single product from two or more reactants.
A + B + C → D
Which of the following best illustrates the law of corkervation of energy?
A
The work done stretching a spring is transformed into stored energy in the spring
B
Leak-proof batteries are able to store chemical energy for long periods of time.
С
Ajogger conserves her energy by reducing the rate at which she jogs.
D
Ice water changes into liquid water when it absorbs heat energy.
Answer:
A . The work done stretching a spring is transformed into stored energy in the spring
Explanation:
The work done stretching a spring is transformed into stored energy in the spring is clear indication of the law of conservation of energy.
The law of conservation of energy states that "energy is neither created nor destroyed but transformed from one form to another".
In this problem, mechanical energy is used to stretch the spring. The mechanical energy is converted to stored potential energy.This is an energy transformation process.
terry usually rides his bike at 15 mph. if his riding speed is reduced by 3 mph,
Answer: 12
Explanation: gaming
This is a widely used nonrenewable resource that is formed over millions of years. A wood B water C oil D sand
Answer: C. oil
Explanation:
If a crystal lattice structure is so hard, what causes most ionic compounds to be brittle?
A. Applying force, such as striking the crystal with a hammer, can release protons, causing ions of similar charges to align, repel each other, and dissolve the crystal.
B. Applying force, such as striking the crystal with a hammer, can release electrons, causing ions to alter their charges, repel each other, and dissolve the crystal.
C. Applying force, such as striking the crystal with a hammer, can shift one layer of ions, causing ions of different charges to align, repel each other, and fragment the crystal.
D. Applying force, such as striking the crystal with a hammer, can shift ions, causing ions of similar charges to align, repel each other, and fragment the crystal.
Explanation:
The cations and anions are locked tightly into place because of the attraction of their opposite charges - as a result, it's difficult to move the ions and the material is very hard.
Answer:
d
Explanation:
https://chemistry.stackexchange.com/questions/33322/why-are-so-many-ionic-compounds-brittle
If your cannot keep your balance, what bodily structure might be responsible?
A. Ossicles
B. Semicircular canal
C. Hippocampus
D. Occipital lobe
Answer:
d
Explanation:
HELP ME PLS!! I FORGOT TO STUDY Which may result from an increase in friction?
decreased traction
increased speed
reduced wear and tear
generation of heat
Answer: Generation of heat
Explanation: 1, 2 and 3 are wrong because traction actually increases, speed decreases and wear and tear is produced.
Hope this helps you, love!
Answer:
A, C, and D
Explanation:
Which of the following is a compound? H2 Ne CO2 O2
Answer:
CO2
Explanation:
help me plz...........
Answer:
try use Google search
Explanation:
you need to use it
When matter changes a liquid is it a physical change
Answer:
Yes.
Any physical change is reversible.
I really need help with this ASAP
Answer:
1) Reaction rate, in chemistry, the speed at which a chemical reaction proceeds. It is often expressed in terms of either the concentration (amount per unit volume) of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time.
2) By collecting the hydrogen gas that is produced over water or in a syringe, rate graphs can be produced. The volume of gas produced and the time taken need to be recorded. The rate of the same reaction could be monitored by measuring the change in the mass of reactants as they react to form products.
Help meee, if u help me i give u a pizza :)
which element of the lanthanides series has the largest atomic radius
Answer:
Lathanum
Explanation:
Ben has two gold color nuggets that look identical. However, the density of the first nugget is 4.2 g/mL and the second is 19.3 g/mL.
Are the nuggets made out of the same substance?
How do I balance this science equation?
The number of Oxygen atoms in both of glucose and fructose is 6 atoms, which means 12 in total ,but the sucrose is 11 atoms of Oxygen although it's composed of fructose and glucose, the question where the atom number 12 go ?
Answer:
The atom number 12 of oxygen contributes to the formation of water (H2O) during the process of forming sucrose.
Explanation:
Sucrose is a dissacharide carbohydrate i.e it contains two simple sugars or saccharides. The two simple sugar monomeric components of sucrose are glucose and fructose. As rightly stated in this question, the number of Oxygen atoms in both of glucose and fructose is 6 atoms respectively, which means 12 in total, however, the sucrose molecule has 11 atoms of oxygen meaning 1 oxygen atom is missing.
Sucrose is formed from glucose and fructose by a process called DEHYDRATION REACTION. A dehydration reaction means that one MOLECULE OF WATER IS LOST in order to form a glycosidic linkage/bond that joins fructose and glucose monomeric sugars together in the sucrose molecule. Two hydrogen atoms and ONE OXYGEN atom from the supposed 12 is used to form the WATER MOLECULE.
Assume that a person pouncing a ball represents a closed system. Which
statement best describes how the amounts of the ball's potential and kinetic
energy change?
A. Both the kinetic and potential energy of the ball increase.
B. The ball's kinetic energy increases as it falls and its potential
energy decreases.
C. Both the kinetic and potential energy of the ball decrease.
D. The ball's potential energy decreases as it rises and its kinetic
energy increases.
Answer:
A b9th the kintectic and potentilal energy change
Answer:
B. The ball's kinetic energy increases as it falls and its potential
energy decreases.
Explanation:
Can someone help me with this science
Answer:
Yes I'll help you
A substance is considered more efficient at storing energy when its specific heat enables it to resist changes in temperature. So, a more efficient substance will stay hotter, or cooler, for longer. Which substance—air or water—stores energy more efficiently under equal conditions?
Answer:
Water stores energy more efficiently than air.
Explanation:
Answer:
Water stores energy more efficiently than air.
Explanation:
Edmentum's sample answer
read the instructions and answer
Answer:
laughing this question is a joke I think at first .
Explanation:
there are many mistakes : electrons are revolving in shell or orbits around the nucleus.
first shell always has two electron
after first shell , all shells contains eight electrons
electron have negative charge
proton have positive charge
nucleus have no charge
atom is neutral becoz the + charge of proton. and - charge of electron cancel each other's effect and atom is stable and neutral
Selah is making a mobile of an atom of beryllium to hang from the ceiling in her science class. She uses a clear plastic bag for the nucleus and fills it with white foam balls for protons and black foam balls for neutrons. She suspends blue foam balls from strings around the nucleus to represent the electrons. Which diagram shows Selah's model?
Answer:
See explanation
Explanation:
The question is incomplete because the images of the models are absent. However, i will try to give you a general description of what the correct answer should be.
Beryllium is a member of group 2 in the periodic table. Beryllium has an atomic number of 4. This implies that it has four protons in its nucleus and four electrons in its shells. In a neutral atom, the number of electrons on the shells is equal to the number of protons in the nucleus.
The electronic configuration of Beryllium is 1s2 2s2. This implies that it should have two shells each containing only two electrons each.
Since we are using white foam balls for protons and black foam balls for neutrons, the clear plastic will contain four white foam balls and five black foam balls since the mass number of beryllium is 9 and number of neutrons = mass number - number of protons.
Four blue foam balls hanging from strings will represent the electrons around the nucleus.
Any model that corresponds to the description above is the correct answer.
Answer:
my answer isnt any better than hers
Explanation:
What is the value of 100 ºC on the Kelvin scale? A. 100 K B. 273 K C. 373 K D. -373 K E. -300 K
Answer:
373.15 K
Explanation:
Given data:
Temperature in degree Celsius = 100°C
Temperature in kelvin scale = ?
Solution:
To convert the degree Celsius into kelvin scale we add the given degree Celsius into 273.15.
100°C +273.15 = 373.15 K
Answer:
C. 373K
Explanation:
how many molecules of co2 are there in 4.56 moles of co2?
Answer:
The answer is 2.75 × 10²⁴ moleculesExplanation:
The number of molecules of CO2 can be found by using the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 4.56 × 6.02 × 10²³
We have the final answer as
2.75 × 10²⁴ moleculesHope this helps you
