Answer:
18
Explanation:
The n - level given is 3
To find the number electrons that can occupy this level, we use:
2n²
n - is the energy level.
The energy level here is 3;
2 x 3² = 18
What two methods return water to the ocean?
(select two)
rivers
transpiration
infiltration
perspiration
Answer:
Water in different phases moves through the atmosphere (transportation). Liquid water flows across land (runoff), into the ground (infiltration and percolation), and through the ground (groundwater). Groundwater moves into plants (plant uptake) and evaporates from plants into the atmosphere (transpiration).
NEED HELP ASAP FOR MY TEST
Which is an example of a mixture that can be separated using a filter and a funnel?
A) Kool Aid B) Coca Cola C) salt water D) Sand and water mixture
Answer: D sand and water
Explanation:
Since water is less dense than sand it could be easily separated if you go to the ocean that’s why the water is at the bottom of the sand but on above the sand so it will be able to separate easily.
Answer:
Answer: D sand and water
Explanation:
Molecules that are loosely packed and move over and around each other are found in
O solids
O liquids
O gases
What kind of ions are formed by Calcium (Ca), Sodium (Na), and Chlorine (CI)?
Answer:
The ions are held together by ionic bonds, which form an ionic compound. Ionic compounds generally form between elements that are metals and elements that are nonmetals. For example, the metal calcium (Ca) and the nonmetal chlorine (Cl) form the ionic compound calcium chloride (CaCl2)
Explanation:
The blue color in some fireworks occurs when copper(I) chloride is heated to approximately 1500 K and emits blue light of wavelength 4.50 X 10 squared nm. How much energy of one photon of this light carry?
Given that,
Temperature, T = 1500 K
Wavelength, [tex]\lambda=4.5\times 10^2\ nm[/tex]
To find,
The energy of one photon of this light.
Solution,
We know that, the energy of a photon is given by the formula as follows :
[tex]E=\dfrac{hc}{\lambda}\\\\E=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{4.5\times 10^2\times 10^{-9}}\\\\=4.42\times 10^{-19}\ J[/tex]
So, the required energy is [tex]4.42\times 10^{-19}\ J[/tex].
DUE IN 10 MINS PLEASE HELP ME ASAP!!!!!!!!!!!!!!! !•Directions: Select each correct answer. More than one answer may be correct.
DWhich of the following objects exerts a gravitational force?
A.the Sun
B.an apple
C.the Moon
D.a basketball
E.the Earth
Reset
Submit
Answer:
all of them
Explanation:
every object in the universe that has mass exerts a gravitational pull, or force, on every other mass.
Answer:
All of them
Explanation:
Study Island
In your own words, describe the rock cycle including its processes and the formation of different rock types
Answer:
That’s a question on school- what- I-
Explanation:
How many moles are there in 2.0 grams NaCl?
Answer:
In 2 grams of NaCl are 116,88 mols
Explanation:
One mol of NaCl (6.02 x1023 formulas) has a mass of 58.44 g.
Calculation: 58,44g X 2 = 116,88
2. Calculate the number of moles in 65.5 grams of the following:
a) Copper (II) Sulfate
b) Magnesium Nitrate
c) Potassium Carbonate
Answer:
a) Number of moles = 0.41 mol
b) Number of moles = 0.44 mol
c) Number of moles = 0.47 mol
Explanation:
a)
Given data:
Mass of copper sulfate = 65.5 g
Number of moles = ?
Solution:
Number of moles = mass/molar mass
Molar mass of copper sulfate = 159.6 g/mol
Number of moles = 65.5 g/ 159.6 g/mol
Number of moles = 0.41 mol
b)
Given data:
Mass of magnesium nitrate = 65.5 g
Number of moles = ?
Solution:
Number of moles = mass/molar mass
Molar mass of magnesium nitrate = 148.3 g/mol
Number of moles = 65.5 g/148.3g/mol
Number of moles = 0.44 mol
c)
Given data:
Mass of potassium carbonate = 65.5 g
Number of moles = ?
Solution:
Number of moles = mass/molar mass
Molar mass of potassium carbonate = 138.2 g/mol
Number of moles = 65.5 g/138.2g/mol
Number of moles = 0.47 mol
predict the missing component in the nuclear equation
Answer:
¹⁴₇N
Explanation:
⁴₆C → ¹⁴₇N + ⁰₋₁e
The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.
Beta radiations:
Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.
The mass of beta particle is smaller than the alpha particles.
They can travel in air in few meter distance.
These radiations can penetrate into the human skin.
The sheet of aluminum is used to block the beta radiation
Boiling Point temperatures are dependent
on the...
1. Number of atoms in a compound
2. Amount of oxygen in the molecule
3. Types of Elements present
4. Intermolecular Force Strength
_______________ are filled with special absorbing elements that move up and down between the uranium rods to keep the atoms from getting out of control.
Answer:
The correct answer is - control rods.
Explanation:
Control rods are filled with special absorbing agents such as boron, cadmium, silver, and others to absorb as many neutrons as to control the fission reaction by moving them up and down in between uranium rods.
These control rods are used to prevent the nuclear reaction from getting out of control in the nuclear plant or reactor by absorbing the neutrons and prevent uranium to convert.
what is the overall charge of an atom.
Overall, an atom is neutral charged. The Bohr model was for years accepted as the final authority because it agrees so well with experiment and observation. In this model an atom consists of a nucleus containing protons and neutrons. The neutrons are zero charge so we can forget them in looking for charges. For each proton (1 positive charge) there is always 1 electron (1 negative charge) in orbit around the nucleus. thus an atom has a equal number of electrons and protons and their net charge is zero.
We can do things to temporarily up set this natural balance (we call this electricity) but the atoms will eventually return to their naturally balanced state
a certain mass of gas occupies 2240 volume at a pressure of 760mkhg and temperature of 320k.find it's new volume if the preddure is reduced to 700mmhg and temperature increased to 323k
The new volume : V₂ = 2454.8 L
Further explanationGiven
V₁=2240 L
P₁=760 mmHg
T₁=320 K
P₂=700 mmHg
T₂=323 K
Required
Volume V₂
Solution
Combined gas law :
P₁V₁/T₁=P₂V₂/T₂
Input the value :
760 mmHg x 2240 L /320 K = 700 mmHg x V₂/323 K
V₂=(P₁V₁T₂)/P₂T₁
V₂=(760 x 2240 x 323)/(700 x 320)
V₂ = 2454.8 L
Julie is searching for cookware which is safe for all food preparation techniques, which of the following would best fit her needs?
A. Silicone
B. Glass and ceramic
C. Metal
D. Plastic
If something gain electrons,its charge increases true or false
i think the answer is true.
Answer:
true
Explanation:
True or false? A metal will always be produced at one electrode during electrolysis.
Yes, a metal will always be produced at one electrode during electrolysis.
What is electrode?
An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit.
An electrode can be anode or cathode. During electrolysis, that is , the decomposition of a chemical compound by electricity, a metal will be deposited at the cathode.
Thus, a metal will always be produced at one electrode during electrolysis.
Learn more about electrolysis here: https://brainly.com/question/25712870
#SPJ1
Answer: FALSE
Explanation: Often, gases rather than metals form at electrodes, especially if it involves the electrolysis of a solution.
HELP QUICKK PLEASEEE
According to the Kinetic Molecular Theory, why does an increase of temperature cause an increase of pressure in a closed container?
The particles move faster and hit the walls of the container more often.
The particles move faster and hit the walls of the container more often.
The particles become larger and hit the walls of the container more often.
The particles become larger and hit the walls of the container more often.
The particles react more and hit the walls of the container more often.
The particles react more and hit the walls of the container more often.
The particles break apart and hit the walls of the container more often.
Answer:
According to Kinetic Molecular Theory, an increase in temperature will increase the average kinetic energy of the molecules. As the particles move faster, they will likely hit the edge of the container more often. If the reaction is kept at constant pressure, they must stay farther apart, and an increase in volume will compensate for the increase in particle collision with the surface of the container.
Explanation:
why does the newton's cradle stop swinging
This planet has water in liquid, gas, and solid forms.
O Mercury
O Venus
O Earth
O Mars
Answer:
earth
Explanation:
water vapor, water, ice
Mary, the mouse, was hiding in the rocks when she saw a sandwich hit the ground at
the park. Being she was hungry, she decided to run to the sandwich, which was 30 feet
away. It took her 5 seconds to get to the sandwich. What was her average speed?
animal that hunts and kills other animals for food. It is a consumer ( carnivore or omnivore )?
Answer:
Carnivore
Explanation:
Answer:
Carnivore
Explanation:
You said just animals, not animals and plants
what do thermal insulators do?
Answer:
Thermal insulation. Thermal insulation is the reduction of heat transfer (i.e. the transfer of thermal energy between objects of differing temperature) between objects in thermal contact or in range of radiative influence.
Explanation:
Answer:
The job of a thermal insulator is to reduce the heat transfer
Explanation:
Which synthetic and natural polymers can be used to make thread or rope?
vulcanized rubber and starch
starch and cellulose
nylon and cellulose
vulcanized rubber and nylon
Answer:
D: vulcanized rubber and nylon
Explanation:
on edge! hope this helps!!~ d=(´▽｀)=b
How many micrograms (ug) are in 3.4 x 10^-5 ounces (oz)
Answer:
964ug
Explanation:
The problem here involves converting from one unit to another.
We are to convert from ounces to micrograms.
1ug = 1 x 10⁻⁶g
1oz = 28.35g
So we first convert to grams from oz then take to ug:
Solving:
1oz = 28.35g
3.4 x 10⁻⁵oz will then give 3.4 x 10⁻⁵ x 28.35 = 9.64 x 10⁻⁴g
So;
1 x 10⁻⁶g = 1ug
9.64 x 10⁻⁴g will give [tex]\frac{9.64 x 10^{-4} }{1 x 10^{-6} }[/tex] = 9.64 x 10²ug or 964ug
The color of ink is a ___
Answer:
The ink colors is Magneta, yellow, and black
PLZ helppp meeeeee plllzzzzzzzzzzzzzzzzz &thhxx
Answer:
Option C: Combustion and synthesis only
Explanation:
This reaction is referred to as combustion reaction because carbon is burnt in oxygen to produce carbon (IV) oxide.
Also, it's a synthesis reaction because the two different atoms which are Carbon and oxygen interact to form a different compound which is CO2.
Thus, the correct answer is Option C: combustion and synthesis only
The following is NOT an example of a behavior:
Buying a lottery ticket
Jumping rope
Doing a 60 second plank
Making the decision to buy a lottery ticket
Can you please help me this is due today and I really need help.
What is the name of the molecule with 1 iron atoms and 2 oxygen atoms
Answer:
Carbon
Explanation:
i took this asdf asdf asdf sadf as faasdfasdf
asd
f asdfas
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asdf
Answer:
Fe, or the iron atom
Explanation:
The subscripts designate the number of atoms in the molecule. If there is no subscript, it is understood to be 1.