Answer:
The sharing of valence electrons
Explanation:
A covalent bond is formed when two or more atoms share valence electrons.
In BeCl2, electrons are shared between the beryllium atom and two chlorine atoms.
Owing to the large difference in electronegativity between the two elements, the bond is polar covalent.
All the following are examples of selective breeding EXCEPT a wild dog that finds and mates with a domestic dog. neutering a horse that is particularly small for its breed. adding sheep from another country to the bloodline to help combat disease. purposely mating larger pigs to increase the amount of meat produced.
Answer:
A. a wild dog that finds and mates with a domestic dog.
Explanation:
Why does an ion have a charge
Help please:)
Answer:
An ion is charged because the number of electrons does not equal the amount of particles.
Explanation:
Can be positive (meaning more protons than electrons) and it can be negatively charged (meaning there are more electrons than protons).
Hope this helps!
Answer:
An ion has a charge because the number of electrons dont equal the amount of protons in the molecule or atom.
Explanation:
The negative or positive charge depend on wether the atom or molecule has more electrons(-) or protons(+).
What would happen to the rate of a reaction if the concentration of substrate was increased after the point of saturation?
a)The reaction rate would increase.
b)The reaction rate would decrease.
c)There would be no effect.
Answer:
there would be no effect
Explanation:
A piece of metal is composed of atoms Each atom in the metal contains 29 protons how is the metal classified
Answer:
you an see the answer at the pic
Prototypes are used to
a. communicate a solution.
b. test the operation of a product.
c. identify a need.
d research a problem.
Answer:
Test the operation of the product
Explanation:
What do Lucille's cells need in order for her body to function properly? How might a problem with Lucille's respiratory system lead to low levels of oxygen in her cells? Why does having low levels of oxygen in her cells make it difficult for Lucille to play soccer?
Answer:
In order for her body to act correctly, Lucille's cells require glucose and oxygen. A problem with Lucille's respiratory system leading to low levels of oxygen in her cells is known as Hypoxemia. Having low levels of oxygen in her cells will make it difficult for Lucille to play soccer because she would not be able to breathe .If her respiratory system doesn't function properly, so enough oxygen molecules will not move into her respiratory system , ensuring that her cells won't have enough oxygen molecules. Playing soccer is difficult if you don't have enough air.Explanation:
ABOUT HYPOXEMIA -: It is called hypoxemia to have low oxygen levels in your blood. It is called hypoxia to have insufficient oxygen levels in the tissues. Hypoxemia at high altitudes can occur. Hypoxemia that induces low levels of oxygen in the tissues of the body is called hypoxia. The two words are often used by people interchangeably, but they are not the same thing.
The capacity of the body to supply normal amounts of oxygen to the blood can interfere with a number of conditions and circumstances. Some of hypoxemia's most prevalent causes include:
Heart problems, heart defects included .Lung disorders such as asthma , bronchitis, emphysema. High-altitude areas where oxygen is lower in the air. Powerful drugs for pain or other conditions that delay respiration . Sleep apnea (breathing impairment during sleep) .Lung tissue inflammation or scarring (as in pulmonary fibrosis).Answer:
In order for her body to act correctly, Lucille's cells require glucose and oxygen.
A problem with Lucille's respiratory system leading to low levels of oxygen in her cells is known as Hypoxemia.
Having low levels of oxygen in her cells will make it difficult for Lucille to play soccer because she would not be able to breathe .If her respiratory system doesn't function properly, so enough oxygen molecules will not move into her respiratory system , ensuring that her cells won't have enough oxygen molecules. Playing soccer is difficult if you don't have enough air.
Explanation:
ABOUT HYPOXEMIA -: It is called hypoxemia to have low oxygen levels in your blood. It is called hypoxemia to have insufficient oxygen levels in the tissues. Hypoxemia at high altitudes can occur. Hypoxemia that induces low levels of oxygen in the tissues of the body is called hypoxia. The two words are often used by people interchangeably, but they are not the same thing.
The capacity of the body to supply normal amounts of oxygen to the blood can interfere with a number of conditions and circumstances. Some of hypoxemia's most prevalent causes include:
Heart problems, heart defects included .
Lung disorders such as asthma , bronchitis, emphysema.
High-altitude areas where oxygen is lower in the air.
Powerful drugs for pain or other conditions that delay respiration .
Sleep apnea (breathing impairment during sleep) .
Lung tissue inflammation or scarring (as in pulmonary fibrosis).
Select the measurement with that represents the least amount of pressure.
Select one:
a. 3 atm
b. 3.039 x 1013 Pa
c. 2.280 x 10^3 mm Hg
d. 40 psi
Answer:
a 3atm
Explanation:
or d 40 psi because it is true and corect [b 3.0398 21oinwex id cn uerfh uh 837hf uxhoec
What is the most common isotope of lithium?
Solid substance A has a melting point of 100°C. Liquid substance B has a freezing point of 110°C. For each substance, identify its state of matter and describe the motion of its particles when the substance is at 115°C.
Answer:
both will be at liquid state. the particles will move rapidly in all directions and will collide with other particles in random motion
Select each process that shows a physical change. Select all that apply. Several logs chopped into pieces. Chopping Wood Logs burning as in a campfire. Burning Wood A pot of water on a grate over a burning fire. Heating Water A marshmallow on a stick held above a fire. Roasting Food
Answer:
Chopping wood logsA pot of water o a grate over a burning fireExplanation:
Physical change is easily reversible. Burning/combustion is a chemical process where substances react rapidly with oxygen: this is usually irreversible.
The marshmallow, roasted food and burned wood all undergo combustion and hence are tagged chemical changes.
I hope this helps.
Answer:
Chopping Wood
Heating Water
Explanation:
Please help me immediately I will mark you as brainiest.
How did Thomson's experiment change Dalton's atomic model?
A. Thomson discovered that atoms changed properties when put in
an electric field.
B. Thomson discovered that atoms did not rearrange when forming
compounds.
C. Thomson discovered that atoms of one kind of element could
have different masses.
D. Thomson discovered that the atom contained smaller particles
called electrons.
Answer:
D. thomson discovered that the atom contains smaller particles called electrons
Thomson discovered that the atom contained smaller particles called electrons. The correct option is D.
What is Dalton's atomic model?Dalton proposed that all matter is composed of tiny indivisible particles known as atoms, which he envisioned as "solid, massy, hard, impenetrable, movable particle(s)."
Thomson's experiment altered Dalton's atomic model by revealing the existence of smaller particles known as electrons within the atom.
The first part of his theory states that all matter is made up of indivisible atoms. According to the second part of the theory, all atoms of a given element have the same mass and properties.
One of Dalton's most important contributions is that it does not violate several fundamental laws of chemical combination, including the law of definite proportions, the law of multiple proportions, and the law of conservation of mass.
Thus, the correct option is D.
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You put a drop of food coloring into a container of room temperature water and watched as the color spread out in the water. Describe what caused the color to spread. (You do NOT stir it)
Answer:the dye is heavier than the water so the substances fuse together instead of sitting at the top much like the phenomenon with oil and water combination
Have a good day!
Using the balanced equation below,
how many grams of cesium xenon
heptafluoride would be produced
from the complete reaction of 37.8 g
cesium fluoride?
CsF + XeF6 => CsXeF7
Answer:
Mass of CsXeF₇ = 99.3 g
Explanation:
Given data:
Mass of CsF = 37.8 g
Mass of CsXeF₇ produced = ?
Solution:
Balance chemical equation:
CsF + XeF₆ → CsXeF₇
Number of moles of CsF:
Number of moles = mass/molar mass
Number of moles = 37.8 g/ 152 g/mol
Number of moles = 0.25 mol
Now we will compare the moles of CsF with CsXeF₇ from balance chemical equation:
CsF : CsXeF₇
1 : 1
0.25 : 0.25
Mass of CsXeF₇ :
Mass = number of moles × molar mass
Number of moles = 0.25 mol × 397.2 g/mol
Mass = 99.3 g
Answer:
98.84
Explanation:
All of the following are examples of making physical changes EXCEPT:
A:painting walls
b:Making ice cubes
C:Making oxygen out of water
D:chopping wood
A solution that has a pH of 5
Answer:
don't you have any options
With an average acceleration of 0.50 m/s?, how long will it take a cyclist starting from
rest to reach 13.5 m/s?
Answer:
t = 27 s
Explanation:
Given data:
Average acceleration = -0.50 m/s²
Time taken to reach to the 13.5 m/s = ?
Solution:
Formula:
Vf = V₀ + at
Vf = 0
V₀ = 13.5 m/s
a = -0.50 m/s²
Now we will put the values in formula.
0 = 13.5 m/s - 0.50 m/s²t
0.50 m/s²t = 13.5 m/s
t = 13.5 m/s / 0.50 m/s²
t = 27 s
How many hydrogen atoms are in 2h2+02—2h20?
Answer: Two hydrogen atoms
Explanation:
A water molecule (formally known as dihydrogen monoxide) is composed of two hydrogen atoms and one oxygen atom. But you can't simply take two hydrogen atoms and stick them onto an oxygen atom. The actual reaction to make water is a bit more complicated: 2H2 + O2 = 2H2O + Energy.
What’s this called
Please ASAP
Answer:
carbon dioxide CO[tex]{2}[/tex]
Explanation:
Double Polar Covalent bonds with CO2
Explanation:
Keep in mind that CO2 is a nonpolar molecule
which of the following do all living organisms have in common ?
How many atoms of each element are in one molecule of 2-heptanone?
Once upon a time, Walter the water molecule was traveling around Linda's blood. He was enjoying moving around wherever he wanted. One day, Walter decided to visit some cells. He traveled in and out of the cells as he pleased. Walter decided that he liked the cells so much that he wanted to stay inside and rest in the vacuole. However, as the day went on, Walter felt a change happening around him. Linda had eaten some VERY salty popcorn. Walter LOVED Sally the salt molecule and felt a magnetic attraction to her. The closer the salt came to the cell, the quicker Walter's love for Sally pulled him out of the cell and towards the salt.
Answer:
This story that is related to the movement of water in relation to the amount of solute seeks to explain the process of OSMOSIS in a very interesting way.
Explanation:
The OSMOSIS process is a process where water diffuses from a compartment with fewer solutes to one with higher solutes, that is why the osmotic intention is to balance the concentrations and molarities between both compartments, this is called osmotic balance.
For this to happen, a highly water-permeable barrier is needed.
A helium-filled balloon is released into the atmosphere. As the balloon rises, which
would MOST likely increase and cause the balloon to burst?
O the volume of the helium
O the mass of the helium
o the temperature of the helium
O the density of the helium
what is the standard form of 12,341 us?
Answer:
12341 in standard form = 1.2341 × 10⁴
Explanation:
When you split the number 12341 into a coefficient and a power of 10 you do get 12341 in exponential form, but there is an indefinite number of possibilities.
As you probably want 12341 in normalized scientific notation, the coefficient or significand of 12341 in scientific notation must be in the interval [1,10[.
As there are many ways to express 12341 in scientific notation, in this post we mean 12341 in normalized scientific notation, unless stated otherwise. Therefore:
12341 in scientific notation = 1.2341 × 10⁴.
This can also be expressed as 1.2341 × 10⁴, using the caret symbol, or as 1.2341e+4, which is called 12341 in e-notation.
The valence electrons are those found in the highest energy ____ and ___ orbitals
^Please help ASAP I’ll mark you as brainlister FILL in the blank
The outmost free electron which is present in the outer shell is called valency. The number of elements joining together to form the compound also depends on the valency.
Each electron has revolved around the nucleus and that path is considered as orbit. The orbit is as follows:-
SPDFThe free electrons are usually lie in the outmost shell.
Hence according to the question, the correct option is S and P orbit.
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What does the “188” represent in Tantalum-188
A. mass number
B. atomic number
C. mass defect
Answer:
mass number
Explanation:
When there is an element name followed by a dash and then a number, the number simply represents the mass number.
for example:
Oxygen- 18
18 represents the mass number of this particular isotope
identify the elements given the orbital diagrams listed below.
Answer:
See explanation.
Explanation:
1. There are 8 electrons. Elements that end with 2p orbitals are in the 2nd period (aka row) of the periodic table. Elements that have 4 electrons in 2p are in the 16th group (aka column) (column 16 may also be referred to as 6A) of the periodic table. So looking at row 2, column 16, we can see that the first diagram is of O, Oxygen.
2. 8 electrons. This is the same diagram as the one above.
3. 13 electrons. Elements ending with 3p are in period 3. Elements with 1 valence electron in a p orbital are in group 13 (aka group 3A).
4. 7 electrons. We already know 2p is period 2. 3 valence electrons in a p orbital means that it is in group 15/group 5A.
I did not write the answers for #3 and 4 but they can be easily found on a periodic table with the info I gave.
The elements given the above orbital diagrams are as follows:
Oxygen
Oxygen
Aluminum
Nitrogen
In first case,
There are total 8 electron and the electronic configuration is 1s2 2s2 2p4. The element which end up with 2p configuration belongs to 2nd period. It have four electron in their outermost shell so, it belongs to 16th group, So the element is Oxygen.
In the same way we will find the elements for rest of the cases.
Thus, we reach to the conclusion that the elements given the above orbital diagrams are as follows:
Oxygen
Oxygen
Aluminum
Nitrogen
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Calculate the molarity of a NaOH solution that is prepared by diluting 100mL of 0.20M NaOH with 150mL of H2O.
Molarity of solution = 0.08 M
Further explanationMolarity shows the number of moles of solute in every 1 liter of solution or mmol in each ml of solution
[tex]\tt M=\dfrac{n}{V}[/tex]
Where
M = Molarity
n = number of moles of solute
V = Volume of solution
mol of NaOH[tex]\tt mol=0.2~M\times 100~ml=20~mlmol=0.02~mol[/tex]
molarityVolume of solution = 100 ml + 150 ml = 250 ml
[tex]\tt M=\dfrac{0.02~mol}{0.250~L}=0.08[/tex]
Regina conducted an investigation to determine whether earthworms add nutrients to soil. She used two pots of soil. She added three earthworms to the first pot. She did not add any earthworms to the second pot, which was the control. Regina tested the nutrient levels of the soil in both pots after two weeks. What type of investigation is Regina conducting?
The question is incomplete, the complete question is:
Regina conducted an investigation to determine whether earthworms add nutrients to soil. She used two pots of soil. She added three earthworms to the first pot. She did not add any earthworms to the second pot, which was the control. Regina tested the nutrient levels of the soil in both pots after two weeks.
What type of investigation is Regina conducting?
descriptive
comparative
experimental
procedural
Answer:
experimental
Explanation:
In an experimental study, there is an independent variable, a dependent variable and a set up meant for control.
The control is set up to establish the validity of the study.
Experiments are designed to establish cause and effect relationship. In this case, the experiment was designed to establish weather earthworms add nutrient to the soil.
Answer:
experimental
Explanation:
experimental
Please help me thank you! Stay safe
Answer:
number 3
Explanation:
Explanation:
it's the third graph
values are put directly without scaling