The average atomic mass of Boron: 10.431 amu
Further explanationIsotopes are atoms whose no-atom has the same number of protons while still having a different number of neutrons.
So Isotopes are elements that have the same Atomic Number (Proton)
Atomic mass is the average atomic mass of all its isotopes
In determining the mass of an atom, as a standard is the mass of 1 carbon-12 atom whose mass is 12 amu
Mass atom X = mass isotope 1 . % + mass isotope 2.% + ...
The average atomic mass of boron :
[tex]\tt avg~mass=0.8474\times 10.0129+0.1526\times 11.0093\\\\avg~mass=10.431~amu[/tex]
What are some foods that bacteria helps in the production of?
Answer:
yeasts, moulds, bread, beer, wine, ...
Explanation:
Which of these Is NOT a chemical bond?
Metallic bon
Covalent bond
lonic bond
Molecule bond
Answer: The answer is Molecule bond.
PLEASE HELP!! I WILL MARK THE 1st ONE BRAINLIEST!
Answer:
A is not true.
Blue waves have ~500 nm and Orange waves have ~625 nm
A solution is made by mixing of water and of acetic acid . Calculate the mole fraction of water in this solution. Be sure your answer has the correct number of significant digits.
Answer:
The answer is "0.35".
Explanation:
please find the complete question in the attached file.
Mass of [tex]CH_3C0_2 H[/tex][tex]= 77 \ g \\\\[/tex]
Molar mass of [tex]CH_3C0_2 H[/tex] [tex]= 60.05 \ \frac{g}{mol} \\\\[/tex]
No of moles in [tex]n_{CH_3CO_2H}[/tex] [tex]= 77 \ g \times \frac{1 \ mol \ CH_3C0_2H}{60.05 \ g}[/tex]
[tex]= 1.28 \ mol \ CH_3CO_2H[/tex]
Mass of water [tex](H_2O)[/tex][tex]= 42 \ g[/tex]
The molar mass of water [tex](H_2O)[/tex][tex]= 18.02 \ \frac{g}{mol}[/tex]
moles of water [tex]n_{H_2O}[/tex]:
[tex]= 42 \ g \times \frac{1 mol H_2O}{18.02 \ g} \\\\= 2.33 \ mol \ H_2 O[/tex]
Molfraction of acetic acid:
[tex]X CH_2CO_2H = \frac{n_{CH_3CO_2H}}{n_CH_3CO_2H +n_{H_2}}\\\\[/tex]
[tex]=\frac{1.28 \ mol}{1.28 \ mo1 + 2.33 mol}\\\\ = 0.354\\\\= 0.35[/tex]
The ethyl acetate solution containing the mixture used in this experiment had a concentration of 20.0 g/L of benzoic acid. 1. Recovery of benzoic acid:
Answer:
The correct answer is "[tex]\frac{0.65}{V} \ percent[/tex]".
Explanation:
The given values are:
[tex]M_r=0.130 \ g[/tex]
[tex]M_o=20 \ g/L\times V(L)[/tex]
[tex]=20 \ V[/tex]
As we know,
⇒ [tex]Recovery \ percent=\frac{Amount \ of \ substance \ recovered}{Amount \ of \ substance \ originally \ taken}\times 100[/tex]
On substituting the given values, we get
[tex]=\frac{0.130}{20 \ V}\times 100[/tex]
[tex]=\frac{0.65}{V} \ percent[/tex]
Note: percent = %
A nuclear power plant is scheduled to undergo a retrofitting. What is the most likely outcome of the change?
The power plant will no longer generate radioactive wastes.
The power plant will recycle the water it uses to cool the reactor.
The power plant will be able to reprocess its used uranium fuel.
The power plant will switch from fission reactions to fusion reactions.
Answer:
It's B
Explanation:
I got it right on edjenuity
The most likely outcome of the retrofitting of a nuclear power plant is that it will be able to reprocess its used uranium fuel. Therefore, option C is correct.
What is nuclear power plant?A nuclear power plant is a facility that generates electricity by harnessing the heat produced by nuclear reactions. At the heart of a nuclear power plant is the reactor, where a controlled chain reaction of nuclear fission occurs.
Reprocessing is a process by which the used nuclear fuel is chemically treated to separate out and recover the unused uranium and plutonium, which can then be reused as fuel. This reduces the amount of radioactive waste produced by the plant and also extends the life of the uranium fuel.
The fission reactions to fusion reactions is not currently a viable option for power generation, and the idea that a retrofitting would eliminate radioactive wastes is unlikely, as nuclear power plants will always produce some amount of radioactive waste.
Thus, option C is correct.
To learn more about the nuclear power plant, follow the link:
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A binary molecule consists of how many atoms?
O1
02
3
4
Answer:
2
Explanation:
BIonary bi means 2
i hope this helps :)
What is a possible pH level of acid rain?
7.0
10.5
6.9
4.3
Which graph best represents the relationship between the bars gravitational energy and its height above the ground?
Answer:
the answer is the line that starts at zero and ends in the right corner i have the question and got it right
Explanation:
Is it A, B, C, or D?????
please help!!!!
Answer:
d
Explanation:
Answer:
Its d
Explanation:
Ik you already know this, I just wanted the points tbh
What number should be placed in front of HCl to
balance this chemical equation?
Zn + __HCI - ZnCl2 + H2
Answer:
it should be 2
Explanation:
1. Balance the reaction: Ag + H2S + O2 Ag2S + H2O
which of the following is a true for subtropical jet streams
Answer: how do we answer when there are no options??
Explanation:
Based on the reaction, identify the products. BeF2 + Mg → MgF2 + What type of reaction does this represent?
Answer:
Be replacement
Explanation:
srry they delted my answer before:( someone from brainly all i did was added a link for a quizlet that would help you.. :(
Answer:
Be
Replacement
Explanation:
How many electrons occupy a filled 7s sublevel
Answer:f has 14 electrons in 7 sublevel orbitals,d has 10 electrons in 5 sublevel orbitals,p has 6 electrons in 3 sublevel orbitals,s has 2 electrons in 1 sublevel orbital.
Explanation:
Answer:
14 i think
Explanation:
i googled it
Which step is part of a scientific investigation?
O designing a solution
O implementing the solution
O evaluating the solution
O communicating the findings
Evaluate each scenario to determine whether it represents a chemical reaction.
Baking cake batter:
Shredding paper:
Twisting metal wire:
Newspaper yellowing in the sunlight:
Explanation:
A chemical reaction is one in which a chemical change occurs.
During a chemical change;
The process is irreversibleNew kinds of matter produced There is a change in massBased on these premise;
Baking cake batter is a chemical reaction because you cannot reverse the process
Shredding a paper is not a chemical reaction because no new kind of matter is produced.
Twisting of a metal wire is not a chemical reaction
Yellowing of newspaper in sunlight is a chemical change. The process cannot be reversed
Answer:
1. yes 2. no 3.no 4.yes
Explanation:
A resistor is placed in a circuit. The voltage of the circuit is changed and the current is measured. The graph seen here shows the data that was collected. Determine the resistance of the resistor in this circuit.
what mass of calcium chloride will be produced from 3.750 moles of hcl reacting with ca(oh)2
Answer:
208.125g
Explanation:
Given parameters:
Number of moles of HCl = 3.75moles
Unknown:
Mass of CaCl₂ that will be produced = ?
Solution:
The reaction equation is given as:
2HCl + Ca(OH)₂ → CaCl₂ + 2H₂O
Now, to find the mass of CaCl₂, we have to work from the known to the unknown.
The known specie here is the number of moles of HCl;
2 mole of HCl will produce 1 mole of CaCl₂
3.75moles of HCl will produce [tex]\frac{3.75}{2}[/tex] = 1.875moles
The mass of CaCl₂;
Mass of CaCl₂ = number of moles of CaCl₂ x molar mass
Molar mass of CaCl₂ = 40 + 2(35.5) = 111g/mol
Mass of CaCl₂ = 1.875 x 111 = 208.125g
plzzzzz Plzzz Wil givr brainleast which type of weathering causes the mineral composition of rocks to change
Answer:
Chemical
Explanation:
Cause it is
I need help hee heeeeeeeeeee
In which Colorado Rockies scenario was there more erosion? Why was there more erosion in the scenario?
Answer:
There was more erosion in the Colorado Rockies scenario where there was steady rain compared to the scenario in the same area where there was only a drizzle. There is more erosion because the steady rain increased the volume of the river more than the drizzle did. Because there was more water added to the river, the river flowed faster. The faster a river flows, the more sediments it transports or erodes.
Explanation:
Edge
There was greater erosion inside the Colorado Rockies situation when there was persistent rain.
What is erosion?Erosion is the loss of soil or rock from the Earth's crust's surface, as well as the movement of the removed material by natural forces (such as wind or water). The term "erosion" is used in its broadest sense to refer to the overall thinning and moulding of all landmasses on the surface of the planet, such as the corrosion of rock in its natural position, the vehicles and public of weathered material, as well as erosion brought on by wind action, marine, as well as glacial processes.
In contrast to the situation within the identical region where there was simply a drizzle, there was greater erosion inside the Colorado Rockies situation when there was persistent rain. Because the volume of a river was raised by the constant rain more than by the drizzle, there is more erosion. The river flowed more quickly as a result of the additional water. A river transfers or erodes more material the quicker it runs.
Therefore, there was greater erosion inside the Colorado Rockies situation when there was persistent rain.
To know more about erosion, here:
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Read this excerpt from the beginning Through the Looking Glass of by Lewis Carroll. "Kitty, can you play chess? Now, don't smile, my dear, I'm asking it seriously. Because, when we were playing just now, you watched just as if you understood it: and when I said ‘Check!’ you purred! Well, it WAS a nice check, Kitty, and really I might have won, if it hadn't been for that nasty Knight, that came wiggling down among my pieces.” What can readers predict about Alice? She will have an active imagination. She will be a serious young girl. She will be a competitive chess player. She will have difficulties getting along with others.
Answer:
She will have an active imagination.
Explanation:
I took the test and i got 90%
But this one is right, hope this helps ( :
Answer:
a
Explanation:
give the person above me brainlest :)
every spring has an equilibrium position which statement describe a spring at it equilibruim position?
What products will most likely form when a carboxylic acid reacts with an amine at high temperatures, or in the presence of a catalyst
Answer:
An amide and water are the products formed
Explanation:
Here, we want to know the possible products that could be formed from the reaction of a carboxylic acid with an amine.
An anime has the functional group NH2 while for an organic acids, we have COOH.
So essentially we want to know the result of these two functional groups coming together to react.
The reaction between these two will form an amide in conjunction with water.
Take for example;
R-COOH + R’-NH2 ———> R-COHN -R’ + H2O
Where R and R’ may be the same or different alkyl or aryl groups
Please help I will give brainiest
Answer: environmental
Explanation:
what observation could be evidence that a chemical reaction has occurred?
Answer:
Heat
Explanation:
which chemical equation follows the law of conservation of mass
Answer:
the law of conversation of mass States that mass is an isolated system is neither created or destroyed by chemical reactions or physical transformations. according to the law of conversation of mass the mass of the product in a chemical reaction must equal to the mass of reactants
hope It helped you
Which of these elements have a smaller radius?
Your answer:
O Oxygen
O Boron
Answer:
boron is the right answer I have studied
Which substance is heatergeneous mixture
A. Pure olive oil
B. A sugar cube
C. Chicken noodle soup
D. Liquid dishwashing soap
Answer:
The answer is A
Explanation:
I am Mr. Know It All