Answer:
Genes
Explanation:
Eye color is a genetic feature given to a child by the parents.
a 50.0 ml beaker contains 680. g mercury what is the density of mercury
Answer:
5.43 grams
Explanation:
because, Its one of the smallest planets, and is also very close to the Sun.
is it possible for a molecule to have polar bonds and not have a net dipole?
How is fission different from a simple chemical reaction? (1 point)
Protons cause fission reactions, while chemical reactions involve electrons.
Fission can happen with radioactive forms of atoms.
Fission reactions run out of control, while chemical reactions are controlled.
Atoms are split into smaller pieces during fission.
Answer:
C
Explanation:
Fission reactions run out of control, while chemical reactions are controlled. :)
"Chemical reactions are depends on electrons while fission depends on protons. In fission , there is no any effect of temperature while in case of chemical reaction rate of reaction will be affected."
What is chemical reaction?
The type of reaction in which more than one molecule get combined and form a different kind of product then such type of reaction can be considered as chemical reaction.
What is Fission reaction?
Fission is the breaking of a heavy nucleus into lighter nuclei, while fusion is the joining of nuclei to create a larger and heavier nucleus.
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Which is a common unbalanced force acting on objects in motion?
a. friction
b. speed
c. inertia
d. acceleration
Answer:
a. friction
Explanation:
What is a common unbalanced force acting in motion? Common forces that are often unbalanced include the force of gravity and applied forces. When these forces are unbalanced, objects accelerate, change their position and find new configurations for which all forces are again balanced.
Friction is a kind of force.
Why and how does heat transfer? When does it stop transferring?
The transfer of heat will continue as long as there is a difference in temperature between the two locations. Once the two locations have reached the same temperature, thermal equilibrium is established and the heat transfer stops.
Heat is transferred from a warm body to a cooler body. The temperature of the warm body drops while the temperature of the cooler body rises. When the two temperatures are equal, thermal equilibrium is attained, and the heat transfer stops.
Suppose you discovered a Group 2 element that has an atomic number larger than radium (Ra). What do you expect the melting and boiling points to be? Explain.
Answer: The melting point would be lower and the boiling point would be higher
Explanation: From Beryllium to Barium the melting point and the boiling point were constantly decreasing. after that, Radium's boiling point starts to increase in temperature. So I would assume that if there was an element in group 2 with a higher atomic number than Radium it's melting point would continue decreasing while the boiling point increased.
When, we discovered a Group 2 element having an atomic number larger than radium (Ra). Then, we expect that the melting and boiling points of Group 2 elements generally decrease as you move down the group. This is because the outermost electrons are farther from the nucleus due to the increased number of electron shells.
Group 2 elements are alkaline earth metals, and they exhibit certain trends in their physical properties as you move down the group in the periodic table. Radium (Ra) is the last naturally occurring element in Group 2. If we discover a hypothetical Group 2 element with an atomic number larger than radium, it would likely be an artificially synthesized element, and its properties would be subject to speculation.
As we move down Group 2, the atomic number increases, and the elements have more electron shells. This leads to several trends:
Melting and Boiling Points:
The melting and boiling points of Group 2 elements generally decrease as you move down the group. This is because the outermost electrons are farther from the nucleus due to the increased number of electron shells. As a result, the metallic bonds that hold the atoms together weaken, making it easier to break the lattice structure and transition from solid to liquid or gas.
If the hypothetical Group 2 element has an atomic number larger than radium, it would likely have more electron shells and thus a lower melting and boiling point compared to radium. This trend follows the pattern observed in other Group 2 elements.
Density:
Group 2 elements also tend to become less dense as you move down the group. This is because the increase in electron shells leads to larger atomic sizes, and the increased atomic volume decreases the packing efficiency in the solid state.
A Group 2 element with an atomic number larger than radium would likely have a lower density than radium, following the trend observed in the rest of the group.
Reactivity:
Group 2 elements become more reactive as you move down the group. This is because the outermost electrons are farther from the nucleus and are more easily lost, leading to more vigorous chemical reactions, especially with water and oxygen.
The hypothetical Group 2 element might exhibit increased reactivity compared to radium and other elements in the group.
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A 12.0 L helium balloon is inflated in an air-conditioned store at 21.0C. Assuming that the pressure remains constant, how large is the balloon when it is taken outside on a hot day at 40.0C?
The ballon will be 22.86L large when it is taken outside on a hot day at 40⁰C
According to pressure law, the volume of a given mass of gas is directly proportional to the temperature. This is expressed as:
V = kT
k = V1/T1 = V2/T2
Given the following parameters
V1 = 12.0L
T1 = 21⁰C
T2 = 40.0⁰C
Required
Final volume
Substitute the given parameters into the formula
12/21 = V₂/40
21V₂ = 12 * 40
21V₂ = 480
V₂ = 480/21
V₂ = 22.86L
Hence the ballon will be 22.86L large when it is taken outside on a hot day at 40⁰C.
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How to round the number 314.77 to 2 significant figures
Answer:
发你如果热客人看看如果
Explanation:
Answer:
result = 310
significant figures = 2
Explanation:
How to round significant figures:
look the first non-zero digit if rounding to one significant figure, look the digit after the first non-zero digit if rounding to two significant figures. draw a vertical line after the place value digit that is required.look at the next digit.
result = 310
significant figures = 2
I can’t find the answer, can you help me please?
Answer: Warm ocean air then rises into the storm, then forming an area of low pressure underneath. :)
Explanation:
When do forces occur?
Answer:
When there is an interaction between two objects.
Explanation:
Which of the following is equal to avogadros number?
A. The number of atoms of bromine in 1 mol Br2
B. The number of molecules of chlorine in 0.50 mol Cl2
C. The number of molecules of nitrogen in 1 mol N2
D. The number of atoms in 1 mol CO
Answer:
A. The number of atoms of bromine in 1 mol Br2
Explanation:
Hello?
In Avogadro's constant/ number, we talk about atoms in 1 mol and not molecules.
In Avogadro's constant/ number, we talk about atoms in 1 mol and not molecules. The solution will have also been C. But it is talking about molecules. Please bear in mind that molecules is based on grams that it an element contains overall.
I hope this helps. Have a nice studies.
Kinda confused on this. i need some help.
You think you have found a diamond. Its mass is 5.28 g and its volume is 2 cm3.What did you find? What is its density?
Determine the enthalpy for this reaction: Ca(OH)2(s) CO2(g)→CaCO3(s) H2O(l).
Answer: This is an acid-base reaction (neutralization): Ca(OH) 2 is a base, CO 2 is an acid. ; White, odorless powder. [Note: Readily absorbs CO2 from the air to form calcium carbonate.]
Explanation:
Answer:
-113.2 kJ/mol
Explanation:
(-1207-285.8)-(-981.1-393.5)= -133.2
(Products)-(Reactants)= Answer
How many metals, nonmetals and metalloids are there in the periodic table?
Answer:
There are 118 elements in the nature.
Metals s = 92
Non metals = 20
Metalloids Ms = 6
Explanation:
A chemist who frequently carries out a complex experiment is
likely to have high:
a. Precision, but low accuracy
b. Precision
c.Accuracy, but low precision
d.Accuracy
Answer:
c.
Explanation:
This is because the chemist will get the average of the experiment from multiple attempts but not precision because the experiment is complex rather than simple.
The chemist will most likely have high accuracy, but low precision. A
chemist who has been performing experiments frequently will be accurate
when taking the required measurements for the experiment due to the
frequency.
Precision however won't be affected because precision deals with how
close his results from the experiment are. The complexity of the
experiment and the different variables used makes him likely to have low
precision.
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The primary way in which the amount of carbon dioxide in the atmosphere can be increased is by ____.
the burning of fossil fuels
Perform the following mathematical operation, and report the answer to the correct number of significant figures.
0.34 x 0.568 = [ ? ]
Answer:
0.19312
0.19312 0.19312
Please use the image to answer the question thanks : >
Bye, Have a good day.
what image? you didn't attach one.
THIS IS DUE LIKE REALLY SOON I RLLY NEED HELP :,)
I need help with this
Pls help me, I’ll give 30 points
NaF NF3 SiF4 CaF2 NH4F
Identify and explain which of the listed compounds from the list are ionic and which are covalent.
no outside links please
What does it mean for a unit to be "derived"?
Answer:
you differentiate to find the derivative
Explanation:
Answer:
A derived unit is a unit that results from a mathematical combination of SI base units.
OR
A unit of measurement obtained by multiplication or division of the base units of a system without the introduction of numerical factors.
Explanation:
i dont know if that answered your question
Which of the following examples involves an exothermic change.
a. ice melting on a warm day
b. water boiling in a tea kettle
c. gaseous water particles coming together to form fog
d. air in a bicycle tire gaining pressure after a long ride
Which of the following examples involves an exothermic change.
Answer : C
Explanation : Gaseous water particles coming together to form fog
Hope this helps you!
Gaseous water particles coming together to form fog is an exothermic change due to release of thermal energy.
What is exothermic change?
An exothermic reaction is defined as a reaction that releases heat energy to the surrounding environment. It include any combustion process, rusting of iron, and freezing of water.
In conclusion, we can say that Gaseous water particles coming together to form fog is an exothermic change due to release of thermal energy.
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i2 is an example of which covalent molecule
1.Iodine
I hope it help you
Answer:
Yes, it has only a single covalent bond.
Explanation:
It has only a pair of electrons between the iodine atoms in order to gain a stable arrangement of 8 electrons in its outer shell. It is sharing them, so it's a covalent bond as a single iodine atom cannot be stable on its own. It's a halogen and is a single covalently-bonded diatomic molecule.
What’s boiling/melting point
Answer:
Melting point is the temperature at which solid and liquid phases of a substance are in equilibrium.
Boiling point is the temperature at which its vapour pressure is equal to the external pressure.
Answer:
melting point is the temperature at which a solid changes into a liquid.
boiling point, temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure
Explanation:
please help!!!
Select the correct answer.
According to the valence bond theory, what kind of bond forms when valence atomic orbitals overlap with an unpaired electron?
A. covalent bond
B. sigma bond
C. pl bond
D. no bond
Answer:
A. covalent bond
Explanation:
Hope this helps out!
Why is it important to possess fundamental research skills in pursuing your study?
Answer:
Research Skills enable people to identify a problem, collect informational resources that can help address the problem, evaluate these resources for quality and relevance and come up with an effective solution to the problem.
Explanation:
It is important because it might increase you critical thinking skills and it's much more easy for you to collect data. It also helps you analyze information from different sources off the internet.
What compound is this?
Answer:
Carbon Tetrachloride
Explanation:
1 Carbon atom, 4 chlorine atoms (hence "tetra" prefix)
