Answer:
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Explanation:
fyit77fyty
fgyfdftdttdtofttdrftyotyo
ghtytyuuy;
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9. What is the process of nuclear fusion? *
(10 Points)
O A. The process of carrying light
B. The process of two atoms fusing
O C. The process of gravity and inertia keeping the universe together
O D. The process of fusing two stars
Answer:
the process of carrying light
Convert 2.072x10^43 atoms element to moles
Given :
Number of atoms of an element, n = 2.072 × 10⁴³ atoms.
To Find :
Number of moles of that element in given number of atoms.
Solution :
We know, 1 mole of any element contains 6.022 × 10²³ atoms.
So, number of moles in given number of atoms are :
[tex]n = \dfrac{2.072\times 10^{43}}{6.022\times 10^{23}}\\\\n = 3.441 \times 10^{19}\ moles[/tex]
Hence, this is the required solution.
7 Ba(ClO3)2
How many oxygen atoms are shown?
Earthquakes can happen at which type of plate boundaries? (Select ALL that apply)
A. Divergent
B. Convergent
C. Transform
Answer:
convergent plates
Explanation:
Answer:
Transform.
Explanation:
Which of the following reactions is balanced?
A. caC12 + H2C03 2CaC03 + HCI
B. caC12 + caC03 + 2HCl
C. caC12 + 2H2C03 caC03 + HCI
D. 2caC12 + H2C03 cac03 + HCI
Answer:
B. CaCl₂ + H₂CO₃ → CaCO₃ + 2HC
Explanation:
A balanced reaction has the same number of atoms in the both sides of the reaction. In the options:
A. CaCl₂ + H₂CO₃ → 2CaCO₃ + HCI
In this reaction there is 1 Ca in reactants and 2 in products -The reaction is unbalanced-
B. CaCl₂ + H₂CO₃ → CaCO₃ + 2HCl
There is 1 Ca is both sides, 2Cl, 2H, 1C and 3 Oxygens -The reaction is balanced
C. CaCl₂ + 2H₂CO₃ → CaCO₃ + HCI
There is 1 Ca in both sides but 2Cl in reactants and 1 in Cl -The reaction is unbalanced-
D. 2CaCl₂ + H₂CO₃ →CaCO₃ + HCI
There are 2 Ca in reactants and 1 in Ca -The reaction is unbalanced-
16.
Which of the following elements is a metalloid?
a. As
c. Br
b. Se
d. Kr
Answer:
a. As
Explanation:
Wave motion
Vibration
What does the wave shown in the photograph transport from left to right?
Answer:
B. Energy
Explanation:
I took the quiz apix
What is the movement of matter due to density differences called?
A a convection current
B a pressure belt
C a climate cycle
D an ocean current
Answer:
A convention current.
Explanation:
What is ground state? What is excited state?
Answer:
A ground-state atom is an atom in which the total energy of the electrons can not be lowered by transferring one or more electrons to different orbitals.
A excited state is any of the energy levels of a physical system, especially an atom, molecule, etc., that has higher energy than the lowest energy level.
Answer:
Ground state is the lowest possible energy state an atom can have. Excited state is an energy level that is higher than ground state. :)
When studying seismological data scientists use data from...
I do not understand science but if u ask me I would have no clue do u get what I mean
what is the boiling point of a solution of 0.150mole Al(No3)3 in 0.500kg water. kb= 0.512
The boiling point of a solution : 100.1536 °C
Further explanationGiven
0.150 mole Al(NO₃)₃ in 0.500 kg water. kb= 0.512
Required
The boiling point
Solution
Colligative properties
ΔTb = Kb . m
m = molality = mol solute per kg solvent
m = 0.15 moles : 0.5 kg
m = 0.3
ΔTb = 0.512 x 0.3
ΔTb = 0.1536
ΔTb = Tb solution - Tb solvent (solvent=water, boiling point = 100 °C)
0.1536 = Tb solution - 100
Tb solution = 100.1536 °C
Pllllllsssssssssss helpppp Determine the Mass Number of the Following Elements:
Al - 13 Protons 15 Neutrons
B - 5 Protons 6 Neutrons
C - 6 Protons 8 Neutrons
Sc - 21 Protons 25 Neutrons
Na - 11 Protons 13 Neutrons
How does sexual reproduction increase the variance of traits in a population?
Answer:
Sexual reproduction promotes genetic variation by producing different gene combinations.
6 NH4Cl
How many hydrogen atoms are shown?
Answer:
24
Explanation:
6*4=24
2 points
If an element has 20 protons, 20 electrons and 20 neutrons, what is the
atomic number of this element?
Answer:
20
Explanation:
The atomic number of this element is 20.
Atomic number is the number of protons within an atom.
Since we have been given that the number of protons is 20. Therefore, the atomic number is 20.
Mass number of the atom is the number of protons plus the number of neutrons.
For this atom, mass number = 20 + 20 = 40
Atomic number is 20
I need help with this question
what is the pOH of a solution if the concentration of hydronium ionsis 8.9x10-9
pOH of a solution = 5.95
Further explanationGiven
The concentration of hydronium ions : 8.9 x 10⁻⁹
Required
pOH
Solution
pOH = - log[OH]
[H₃O⁺]= 8.9 x 10⁻⁹
pH = - log[H₃O⁺]
pH = 9 - log 8.9
pH = 8.05
pH + pOH = 14
pOH = 14-pH
pOH= 14-8.05
pOH = 5.95
If an 85.0 mL container of helium gas at standard pressure is heated from 20 C to 91 C and the pressure is increased to 2.8 atm then what would the new volume be for the He gas?
Answer:
V₂ = 37.71 mL
Explanation:
Given data:
Initial volume = 85.0 mL
Initial pressure = 1 atm
Initial temperature = 20°C (20 +273 = 293 K)
Final temperature = 91°C (91+273 = 364 K)
Final volume = ?
Final pressure = 2.8 atm
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
V₂ = P₁V₁ T₂/ T₁ P₂
V₂ = 1 atm× 85.0 mL × 364 K / 293 K × 2.8 atm
V₂ = 30940 atm.mL.K / 820.4 K.atm
V₂ = 37.71 mL
Can someone tell me a summary about the electromagnetic spectrum
Answer:
Explanation:
it assigns a color for various temps, frequencies, and wave lengths. basically if you have a temprature of something you can use the electromagnetic spectrum to find the color of the object, the frequencies, and wave lengths, etc.
PLZ HELP THIS IS DUE RN!!!!!! NO ONE IS HELPING ME :(
You hold a 50N bowling ball above your head for 15 minutes. How much work have you done? Why?
9. You run the 100 M race in 15 seconds and your identical twin runs it in 14s. Who did more work? Why?
Answer:
Eght: 0
Explanation:
The work formula is W = F*d where d is displacement (which means the direction matters)
Same amount of work.
Eight
Time does not matter in Work. Force and Distance do.
F = 50 N
s = 0 The only work you have done is move the ball above your head. Thereafter you just held it.
t = 15 but no work is done. Tell your tired muscles that as they try and deal with holding a 5 kg mass above you head.
W = 0
Nine
Again from the last question you should be able to tell that time does not matter. The force is the same for both of you (that's why he's your identical twin).
So the work is the same. You both weigh the same. You both went the same distance.
8
how many formula units are in 4.5 moles of NaCl
Answer:
2.71*10^24 formula units in 4.5 moles NaCl
Explanation:
Remark
Make sure you know what a formula unit it. In this case, what it consists of is 1 ion of Na+ Combined with 1 ion of Cl- Together they combine to make NaCl which is ordinary table salt.
1 mole contains 6.02 * 10 ^23 formula units of any chemical -- in this case NaCl.
Therefore 4.50 moles have 4.5 * 6.02*10^23 formula units.
Answer:2.71*10^24
PLEASE HELP I NEED TO FINISH IT PLEASEEEEE
Answer:
heat flows from hot to cold
Explanation:
when heat flows from hot to cold, the cold can form cold to warm and the cycle start again
Which family of elements is listed in order of increasing atomic radius?
a. O, S, Se, Te
b. Na, Mg, Al, Si
c. Sr, Y, Sr, Rb
d. I, Br, Cl, F
e. C, N, O, F
will give brainiest for correct please hurry though
Answer:
i think its answer B.....
A mixture of 1.20 mols He, 2.40 mols Ne, 4.80 mols Kr, and 0.60 mols Ar has a total pressure of 600.0 mm Hg. What is the partial pressure of the Kr? Show all work to receive full credit.
Answer: The partial pressure of the Kr is 320 mm Hg.
Explanation:
According to Raoult's Law , the partial pressure of each component in the solution is equal to the total pressure multiplied by its mole fraction. It is mathematically expressed as
[tex]p_A=x_A\times P_{total}[/tex]
where, [tex]p_A[/tex] = partial pressure of component A
[tex]x_A[/tex] = mole fraction of A
[tex]P_{total}[/tex] = total pressure
mole fraction of Krypton = [tex]\frac{\text {Moles of Kr}}{\text {total moles}}=\frac{4.80}{1.20+2.40+4.80+0.60}=0.53[/tex]
[tex]p_{Kr}=0.53\times 600mmHg=320mmHg[/tex]
Thus partial pressure of the Kr is 320 mm Hg
The partial pressure of krypton in the given mixture if total pressure is 600 mmHg is 320mmHg.
How do we calculate partial pressure?Partial pressure of any gas will be calculated by using the Rault's Law as:
p = (x)(P), where
p = partial pressure
P = total pressure = 600 mmHg
x = mole fraction
Mole fraction of krypton = moles of krypton/total moles
x = 4.80 / (1.20+2.40+4.80+0.60)
x = 0.53
Partial pressure of krypton will be calculated as:
p = (0.53)(600) = 320mmHg
Hence partial pressure of Kr is 320mmHg.
To know more about Rault's law, visit the below link:
https://brainly.com/question/10165688
is the "flow" of electricity through a
circuit (7)
Answer:
Yes
Explanation:
Answer:
flow of electrons in a circuit or electrical system.
more a electrical system
Explanation:
An electric current is it
PET plastic # 1 is used in water bottles and pop bottles. Why should they be recycled but not be reused?
They should be recycled but not reused because the "repeated use increases the risk of leaching and bacterial growth." Also, recycling PET plastic "results in reduced energy consumption, lower cost, and reduced environmental impact."
AlBr3 reacts with Fe(NO3)2. Which of these is a likely product of this reaction?
Answer:
FeBr2
it is what it is indeed
how would you explain that after putting in the same amount of heat, the two materials have different temperatures?
Answer:
one material is probably a conductor of heat, which means it absorbs it much better and faster while the other material isn't a conductor and it's taking time to heat up
If you dropped the pencil one more time, do you think
it would be more likely to land near the center or near
the edge of the circle? Include evidence to support
your answer.
What does the hydrosphere include?
Glaciers
Groundwater
Lava
Polar Ice
The hydrosphere include glaciers, groundwater, and polar ice. That is option A, B and C.
What is hydrosphere?Hydrosphere is defined as the part of the earth that is made up of water which includes the surface of the planet, underground, and in the air.
The water found in the hydrosphere of earth moves in cycles in such a way that non is lost.
The components of the hydrosphere include the following:
oceans, Polar ice,freshwater,surface water, groundwater, glacial water, and atmospheric water vapour.The polar ice is part of the hydrosphere because it is the frozen part of the earth's hydrosphere.
The lava is not part of the hydrosphere but part of lithosphere and it's released when volcanic eruptions occurs.
Therefore is can be concluded that glaciers, groundwater, and polar ice are parts of the hydrosphere while the lava is not part of the hydrosphere.
Learn more about hydrosphere here:
https://brainly.com/question/25796102
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