Answer:
45.7
Explanation:
Because if the number 1-4 then it goes down and if it 5-9 then it goes up
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:
A student takes four samples of a white crystalline solid and places each in a well plate. On top of each sample, she carefully places 20 drops of clear mystery liquids A, B, C and D. Her results for each well are as follows:
Liquid A: The solid dissolves quickly.
Liquid B: The solid appears unchanged.
Liquid C: A brownish colored liquid is produced.
Liquid D: Fizzing occurs and the well becomes warmer.
In which well does a PHYSICAL change occur?
Answer:
A
Explanation:
Sorry if wrong
Answer:
Liquid B: The solid appears unchanged.
Explanation:
A is a chemical change, because the solid dissolves away.
C is a chemical change, because the solid changes color.
D is a chemical change, because fizzing occurs.
B is the only solid that seems to remain the same.
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. :)
6 NH4Cl
How many hydrogen atoms are shown?
Answer:
24
Explanation:
6*4=24
Your friend cuts his sandwiches in half diagonally because then he gets twice as much
food! What is wrong with his reasoning?
Answer:
It is still one sandwich it doesn't become twice the size just because you cut it, it just becomes one sandwich cut into two
Explanation:
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:
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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.....
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
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.
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.
According to kinetic theory, all matter is made up of small particles. The particles are constantly
moving
Diagram 1 shows how the particles may be arranged in a solid.
Diagram 1
(a)
One kilogram of a gas has a much larger volume than one kilogram of a solid
Use kinetic theory to explain why.
Enter your answer
Answer:
(a) there are strong forces (of attraction) between the particles in a solid
accept molecules / atoms for particles throughout
accept bonds for forces
1
(holding) the particles close together
particles in a solid are less spread out is insufficient
1
or
(holding) the particles in a fixed pattern / positions
but in a gas the forces between the particles are negligible
accept very small / zero for negligible
accept bonds for forces
1
so the particles spread out (to fill their container)
accept particles are not close together
gas particles are not in a fixed position is insufficient
Explanation:
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
what is an example of a chemical change that occurs during weathering
Answer:
Hydrolysis is a chemical wheathering process that may affect silicates and carbonates minerals. an example of such a reaction in which water reacts with a silicates minerals is the following: Mg2SiO4 + 4H2O ⇄ 2 Mg(OH)2 + H4SiO. olivine (forsterite) + water ⇄ brucite + silicic acid.
Explanation:
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.
How does sexual reproduction increase the variance of traits in a population?
Answer:
Sexual reproduction promotes genetic variation by producing different gene combinations.
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:
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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:
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
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
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
Please help me, Thank you!
Answer:
amount of charge
Explanation:
Oxygen and sulfur are both in Group 16, which means they have a -2 charge. They have two more electrons than protons, making the charge of the ion negative.
Hope that helps.
Question 3, please help!! 10 points
Answer:
0.68 centiseconds
Explanation:
I looked it up
Answer:
The person above is correct 6800 converted to centiseconds is .68
Explanation:
you have to divide x by 10000 to convert it into centiseconds
in this case x=6800
6800÷10000= 0.68
What does x mean- like person x person?
Answer:
× = and
Explanation:
person and person
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
5.0g of copper is heated from 20 Celsius to 80 Celsius. How much energy it was used to heat Cu? (Specific heat capacity of Cu is 0.092 cal/g)
Answer:
the energy used to heat Cu is 27.6 Cal
Explanation:
given data
mass m = 5 g
Specific heat capacity of Cu = 0.092 cal/g
temperature T2 = 80 Celsius
temperature T1 = 20 Celsius
solution
we get here energy used to heat Cu that is express as
Q = m × c × ΔT ....................1
so here m = mass and c = specific heat capacity
and ΔT = T2 - T1
so put value in eq 1
Q = 5 × 0.092 × (80 - 20)
Q = 27.6 Cal
so that the energy used to heat Cu is 27.6 Cal
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
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
1 Produce a time line for the formation of the atmosphere,
starting with the formation of the Earth 4500 million years ago.
2 Use your research skills to find out:
a more about the ozone hole problem
b what precautions are necessary to prevent an increase in
skin cancers.
Pls help!!!!!
Answer:
1) Well I think you need to research that in G00GLE
Explanation:
2 answer
a) The thinning is most pronounced in the polar regions, especially over Antarctica. Ozone depletion is a major environmental problem because it increases the amount of ultraviolet (UV) radiation that reaches Earth's surface, which increases the rate of skin cancer, eye cataracts, and genetic and immune system damage.
b) Seek the shade, especially between 10 AM and 4 PM.
Don't get sunburned.
Avoid tanning, and never use UV tanning beds.
Cover up with clothing, including a broad-brimmed hat and UV-blocking sunglasses.
Use a broad-spectrum (UVA/UVB) sunscreen with an SPF of 15 or higher every day.
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
A client is to recieve 2.00g of a drug. The drug comes on a solution that has 500 mg per 5.0 mL. Each vial contains 10 milliliters. How many vials do you need?
Answer:
2 vials
Explanation:
The concentration (C) of the drug in the solution is:
C= 500 mg/5 mL = 100 mg/mL
Each vial with a volume (V) of 10 mL, contains the following mass of drug:
V= 10 mL ⇒ C x V = 100 mg/mL x 10 mL = 1000 mg
As you need 2.00 g, and 1 gram is equivalent to 1000 mg, the mass needed is 2.00 g x 1000 mg/1 g = 2000 mg
Thus, you have to divide the mass you need into the mass of each vial:
(2000 mg)/(1000 mg/vial) = 2 vials
Therefore, you need 2 vials.
