Because it is extremely hot.
How did Thomson's discovery of neon's isotopes lead to the discovery of neutrons?
Answer:
Neon consisted of atoms of two different masses but chemically alike. ... Movement of electrons between energy levels in atom must absurb just a certain amount energy to move to higher level can't hover between levels.
Lithium-6 is 7% abundant and Lithium-7 is 93% abundant. What is the average atomic mass with the correct significant figures?
O 7 amu
O 6.9 amu
O 6.93 amu
O 6 amu
Answer:
Average atomic mass = 6.93 amu.
Explanation:
Given data:
Percent abundance of lithium -6 = 7%
Percent abundance of lithium - 7 = 93%
Average atomic mass of Li = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass = (7×6)+(93×7) /100
Average atomic mass = 42+ 651 / 100
Average atomic mass = 693/ 100
Average atomic mass = 6.93 amu.
the forces that moves against movement
Answer:
Friction
Explanation:
A student was assigned to take water samples from a lake his home . He measured the pH of one of the water samples to be 6.0 . Which of the following best describes this sample of water ?
-highly avid
-slightly acid
-highly basic
-slightly basic
Answer: I'm guessing but I think this is the answer and also what I put in mine sorry if wrong
Explanation: I think it's "B.- Slightly Acidic" srry if it's too late-
Which elements likely conduct electricity well ?
Check all that apply
Chromium
Iodine
Carbon
Calcium
Osmium
Answer:
Chromium, calcium, and osmium
Explanation:
These elements are metals, considering this, these elements electron shells(orbitals) are further away from the nucleus, with this, their attractions are not as strong as non-metals, so some of their electrons are able to move freely.
When you accumulate many atoms, these metals can form a "sea of electrons" because they all have loose electrons interacting with each other. This allows easy conduction of heat and electricity.
Answer:
Chromium
Calcium
Osmium
Explanation:
The elements likely conduct electricity well are chromium, calcium and osmium. As these are metals and are observed to be good conductors of heat and electricity. They have extra electrons to donate and hence flow of electrons cause them to be a good conductor of electricity. Rest iodine is a non-metals which is not good conductors of electricity. Carbon is not itself a good conductor but one of its allotrope which is graphite is a good conductor of electricity.
What did sewage treatment in Ancient Rome and 19th century London have in common? How effective was this strategy and why?
Why is human waste hazardous when it enters the water system?
Where does the material that enters a septic system end up and why?
What is now done to wastewater that was not done until more recently?
In what way are the two ways of treating sewage really just ways of recycling?
Yea pretty much
Explanation:
The example of water boiling away is used to illustrate that water
is not always soluble.
is an unstable substance.
lacks thermal properties.
can change from solid to gas.
Answer:
change from solid to gas
Hii!! I believe the correct answer is D. can change from solid to gas. ((:
why can molecules made of three atoms have a bent or linear shape?
Answer:
Bent = Linear but bent due to the Lone Pairs that it contains, the more Lone Pairs the greater the bent and the smaller the degree. It is 3 atoms total.
The discussion on bent/linear shape, and its further calculation can be defined as follows:
Linear form molecules containing atoms arranged inside a straight line.Molecules having linear electron-pair geometries have sp hybridization so at central atom.Bend molecular geometry, often called angular or V-shaped, relates to molecules that have a non-collinear organization of 2 adjacent bonds.Bent = Linear however bent given the presence of Lone Pairs; more the Lone Pairs, then higher the bent as well as the smaller its degree. This consists of 3 atoms in total.Learn more:
brainly.com/question/2871827
Calculate the pH of substance one if it has an [OH-] that is equal to 3.2* 10^-8
Answer:
pH = 6.5
Explanation:
Given data:
pH of substance = ?
[OH⁻] concentration = 3.2×10⁻⁸
Solution:
pOH = -log[OH⁻]
pOH = -log[3.2×10⁻⁸]
pOH = 7.5
we know that,
pH + pOH = 14
pH = 14- pOH
pH = 14 - 7.5
pH = 6.5
What is true of boric acid?
PLEASE HELP
Hey ima Girl What event is Caused by Gravity
Answer:
D. The water enters an aquifer through infiltration.
Explanation:
Hope it helps you:)
would you like to be my friend?:)
What is base unit used to measure volume?
Answer:
SI unit
Explanation:
the base unit of volume in the SI system is the cubic meter
Answer:
wasdwsdwasdasdhjkgchkhjck
Explanation:
gkghkghklhjljkxfjy iuipfghjgykjhgklj
Deposits of gold can be found in the deep ocean. true?
Answer:
yes that should be true
Answer:
true
Explanation:
One study found there is only about one gram of gold for every 100 million metric tons of ocean water in the Atlantic and north Pacific
I didn’t get any help my recent question so I’m posting it again to see if anybody sees it this time
Question!!!
Determine half life exploration of isotopes
I need help with number 3
the equation is 4Al+3O2=2Al2O3
In glucose (C6H12O6)
The simplified ratio of C atoms to H atoms is...
__:__.
Answer:
1:2:1 or just 1:2
The molecular formula is C6H12O6 because one molecule actually contains 6 C, 12 H, and 6 O atoms. The simplest whole-number ratio of C to H to O atoms in glucose is 1:2:1,
Explanation:
which of these is true about the total amount of energy in a closed system?
Decreases
Destroyed and created
Increases
Remains the same
Answer:
It remains the same
Explanation:
Al(s) + HCl(aq)→AlCl3(aq) + H2(g) Balance the equation.
Answer:
2Al(s) + 6HCl(aq)→2AlCl3(aq) + 3H2(g)
A karyotype can be used to determine the number of ____________________ (alleles, chromosomes) in a person’s cells.
Answer:
Chromosomes
Explanation:
A karyotype is an individual's collection of chromosomes
Hope this helps!
Plz click the Thanks button :)
Jayla
If someone trys to lur u into a car with candy...say NO. and run away
-THE MORE U KNOW
_NINI
Answer:
as u should. candy ain't even that tempting >^<
Answer:
How about free hoodies and chocolate.....Jkjkjk.....that happened to me once then I got rap edh
Explanation:
Which chemical formula shows an ionic compound?
NaCl
CO2
C6H12O6
N2O
Answer:
NaCl
Explanation:
The only chemical species that shows an ionic compound is NaCl.
NaCl is an ionic compound that conducts electricity in molten state due to presence of free mobile electrons in the structure when molten.
An ionic bond typically forms between a metal and non-metal. In the compound NaCl, Na is the metal and Cl is the non-metal. The difference in electronegativity allows for this bond type to form.Answer:
it is A i took the test could i have the crown please
Explanation:
Can someone plz help I also mark braniliest!
Answer:
D. The chemical formula
Explanation:
For example, in the compound KCl, we know that there are two elements present because you can see it in the chemical formula. We know that KCl consists of potassium and chloride ions.
which three statements giving brainluiest
Answer:
will you be my Gf?:)
I am ready to be your gf:)
EASY
QUICK
What’s the molecular mass of Calcium Carbonate ?
Answer:
100.0869 g/mol
The molar mass of CaCO3 is 100.0869 g/mol. We need to add the molar masses of calcium (40.078 g/mol), carbon (12.0107 g/mol) and three oxygen atoms
Explanation:
Which process has the minimal effect on heating our atmosphere?
1.Conduction,
2.Convection,
3.Radiation
Answer:
Radiation you're welcome <3
Be sure to answer all parts.The equilibrium constant Kc for the reaction below is 61.5 at a certain temperature. H2(g) + I2(g) ⇆ 2HI(g) If you start with 0.155 M hydrogen iodide, what will the concentrations of H2, I2, and HI be at equilibrium?
Answer:
[tex][I_2]=[H_2]=0.0157M[/tex]
[tex][HI]=0.124M[/tex]
Explanation:
Hello!
In this case, for the undergoing chemical reaction, we can write the equilibrium expression as shown below:
[tex]Kc=\frac{[HI]^2}{[I_2][H_2]}[/tex]
However, since the reactions starts with 0.155 M hydrogen iodide, we need to invert the reaction as well as the equilibrium expression:
[tex]2HI\rightarrow I_2+H_2[/tex]
[tex]\frac{1}{Kc}=0.0163 =\frac{[I_2][H_2]}{[HI]^2}[/tex]
And each concentration at equilibrium in terms of the reaction extent is:
[tex][I_2]=[H_2]=x[/tex]
[tex][HI]=0.155-2x[/tex]
Thus, plugging in the new expression we write:
[tex]0.0163 =\frac{x*x}{(0.155-2x)^2}[/tex]
Which has the following valid solution for [tex]x[/tex]:
[tex]x=0.0157M[/tex]
Because the other solution is negative. Therefore, the concentration of hydrogen, iodine and hydrogen iodide at equilibrium turns out:
[tex][I_2]=[H_2]=0.0157M[/tex]
[tex][HI]=0.155-2(0.0157)=0.124M[/tex]
Best regards!
At the equilibrium, the concentration of hydrogen and iodine has been 0.0157 M each, and the concentration of HI will be 0.124 M.
The initial concentration of the reactant has been 0.155 M. From the balanced chemical equation, the ICE table will be:
HI [tex]\rm H_2[/tex] [tex]\rm I_2[/tex]
I 0.155 0 0
C -2x x x
E 0.155 - 2x x x
The value of the equilibrium constant can be given by the ratio of the concentration of products to the reactant.
The equilibrium constant for the reaction will be:
[tex]\rm k_c\;=\;\dfrac{[H_2]\;[I_2]}{[HI]^2}[/tex]
The given constant value has been for the opposite reaction. Thus the constant for the required reaction has been :
[tex]\rm \dfrac{1}{given\;k_c} \;=\;\dfrac{[H_2]\;[I_2]}{[HI]^2}[/tex]
[tex]\rm \dfrac{1}{61.5}[/tex] = [tex]\rm \dfrac{(x)\;(x)}{(0.155-2x)^2}[/tex]
0.0162 = [tex]\rm \dfrac{x^2}{(0.155-2x)^2}[/tex]
By simplyfying the equation,
x = 0.0157 M
At the equilibrium, the concentration of hydrogen and iodine has been 0.0157 M each.
The concentration of HI will be:
HI = 0.155 - 2x
HI = 0.155 - 2(0.0157)
HI = 0.124 M.
For more information about the equilibrium constant, refer to the link:
https://brainly.com/question/10038290
Which phrase best describes bronze?
o a pure metal
o a copper-tin alloy
o a mineral ore containing copper and tin
an ionic compound of copper and tin
Answer:
o A copper-tin alloy
Explanation:
Bronze is composed by copper and tin. This means it is not a pure metal.Bronze cannot be mined, so it is not a mineral ore.An ionic compound of copper and tin could also be theoretically used to describe a non-solid ionic compound of copper and tin. However bronze is solid.Hence the answer is A copper-tin alloy.Isotopes have the same number of ________with different numbers of ________.
My choices
electrons, neutrons, protons
Answer:
electrons, protons i think
Explanation:
Which statement best describes what happens when a person sees an orange t-shirt?
The t-shirt absorbs orange light from human eyes.
Human eyes reflect orange light back to the t-shirt.
Orange light reflected from the t-shirt enters human eyes.
Orange light absorbed by the t-shirt is perceived by the human eyes.
Answer:
The correct answer is - Orange light reflected from the t-shirt enters human eyes.
Explanation:
Human eyes and brain are altogether able to detect the color of the object by translating the light which is reflected by the object and transmitted by the light receptors in the eyes ad brain translate light to color.
The objects are able to absorb some colors and reflect others on the basis of their wavelength, The reflected colors are detected by our eyes and brain and objects appear to be a particular color. like here, the orange color is reflected by the t-shirt and enters in human eyes.
Answer:
its c
Explanation:
Where are people exposed to chemicals?
O A. Mostly in public buildings
O B. Only in the home
C. Mostly outside
O D. Everywhere
Answer:
I believe the correct answer is D.
Explanation:
You are breathing in dinitrogen and dioxygen. You exhale dinitrogen and carbon dioxide. And the atmosphere contains traces of other gases. You drink water. You have a wash with water, and soap. You eat carbohydrates and proteins. You ride to work on a vehicle powered by hydrocarbons, which spits out carbon dioxide exhaust fumes, and also some nitrogen oxides. And so your exposure to chemicals is pervasive, and unavoidable.
Answer:
d
Explanation: