Answer:
it can help heat or cool a room.
Explanation:
I think this is right...
Which of the following elements is a metalloid? A. phosphorus B. cobalt C. silicon D. magnesium
Answer: silicon
Explanation:it just is
Respuesta
es la C. silicio
Explanation:
No existe una definición estandarizada de elemento metaloide ni un consenso completo sobre los elementos que son metaloides.
En la clasificación de metaloides se suelen incluir a:
Boro (B)
Silicio (Si)
Germanio (Ge)
Arsénico (As)
Antimonio (Sb)
Telurio (Te)
i need answer and work
Answer:
9240.759
Explanation:
There are 9.033 x 1023 atoms in 1.50 moles of pure fluorine gas
You are so excited-your first summer job! You are a hot-tub maintenance assistant. You travel to homes, making sure the pH of their hot-tub water is correct (between 7 and 7.6), and adjusting and cleaning when necessary. But before you get started, you need to answer the following questions. What is pH? What do you use to test it? Why would it be important to keep the pH of hot-tub water between 7 and 7.6?
Answer: well i guess we can say that is a scale used to specify the acidity or basicity of an aqueous solution and it is important to keep ph of hot tub water between 7 and 7.6 because if it is not balanced the water can negatively affect your tub.
Explanation:
pH is an extremely important chemical level to maintain in your spa's water chemistry. A high pH or a low pH will spell trouble for you and your spa. On the pH scale, a reading of 7.4-7.6 indicates perfectly balanced pH. Any number lower than 7.4 means that your water is now considered “acidic”.
Answer:
pH is a scale to measure the acidity or basicity of a substance such as water, it would be important to keep the pH of hot-tub water between 7 and 7.6 because if the acidity is too high, the walls of the hot-tub may be damaged, and if the pH is too low, the heating thing may get damaged.
Explanation:
how many moles of calcium is 4.88 multiply by 10^23 atoms of calcium
Answer:
The answer is 0.81 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\ [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{4.88 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{4.88}{6.02} \\ = 0.810631229...[/tex]
We have the final answer as
0.81 molesHope this helps you
3. Which element is a nonmetal? *
1 point
Nitrogen (N)
Iron (Fe)
Titanium (Ti)
Potassium (K)
An object has a mass of 441 g and a volume
of 10 cm3. What is the density of the object
in g/cm3?
The density is the ratio of the mass to the volume. The density of the object is 44.1 g/cm³.
What is density?Density (ρ) is the quantitative measurement of the substance having grams of mass that are dissolved per cubic meter of the solution. The density is calculated as:
ρ = M ÷ V
Given,
Mass of the object = 441 gm
The volume of the object = 10 cubic meter
Density is calculated as:
ρ = 441 ÷ 10
= 44.1 g/cm³
Therefore, 44.1 g/cm³ is the density of the object.
Learn more about density here:
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Which statements correctly describe characteristics of cells? Check all that apply. A. Animal cells are all generally circular in shape.
B. Plant cells come in many different shapes and sizes.
C. Only animal cells have a nucleus.
D. Bacterial cells are smaller than animal or plant cells.
E. Most cells within a living organism are alive.
Answer:
A. Correct
B. Wrong
C. Wrong.
D. Correct.
E. Correct.
Explanation:
what is electron shielding?
Answer:
Electron shielding is when the inner electrons shield the outer electrons from the full force of the nucleus
Some things that can be made from coal are...
A. All of the above
B. Tar
C. Generating power
D. Plastics
E. Fertilizer
Answer:A
Explanation:just casuse
n which phase(s) of matter are the atoms closely packed but still able to slide past each other?
gas
liquid
solid and gas
liquid and solid
Answer:
I belive its liquid if I'm right because liquids are packed together when they take shape but they are still able to move.....brainliest???
Answer:
Liquid
Explanation:
Please don't jugde me if I got it wrong
explain how you know the numbers of atoms in your formula. Carbon Monoxide
Explanation:
hrhrbdbc hdbdbdhdbdbdbdebebebrbbrbrdbbc bf bdvdbf bdbdbdbdbdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdhdgdgdggdgdgddgdhdhdhdhdhddgghdhdgdhdhdhhdhdhdhhdgdgdhdgdgdhdhdgfhfhdv dvdvvvdvdvdvdvddvdvfvdvfgddgfvvgdhhdvdvdvdgfvdhfdvdddhdhfh ddhfhdddhdhhdhfhfhfhhdhdhdhvffv
7th grade help me plzzzzzzzz
Answer:
1. Metals
2. Solid, gas, liquid
Explanation:
For #1:
The majority of elements in the periodic table are classified as metals. The transition metals lie in the center of the table, spanning groups three through 12. These elements are solid at room temperature, except mercury, and have the metallic color and malleability expected of metals.
Hope this helps :)
The sun causes water in the pond to evaporate
1.conduction
2.convection
3.radiation
Answer:
The answer is Radiation
Answer:
Convectional
Explanation:
It is the movement of heat through fluid
While radiation travels though a vacuum and conduction accrues between atoms / solids
give a brainliest if it desires it plzzzz
Lucy learns that the lymphatic system is part of the circulatory system. She wants to learn more about it and reads more carefully about the part it plays in circulation. What is the role of lymph nodes in the lymphatic system?
A. They are found in the plasma and help fight off bacteria and other harmful microorganisms.
B. They filter plasma and return it back to the bloodstream.
C. They filter lymph by trapping harmful bacteria and other microorganisms in the fluid.
D. They transport lymph to where it is needed in the body.
Answer: C because I’m smart
Explanation:
The Lymph nodes have been consisted of the lymph fluid that has been able to entrap the bacteria and kill them. Thus, option C is correct.
Lymph nodes have been defined as the small swellings in the lymphatic system that has been consisting of the various parts of the body.
The lymph nodes have consisted in the neck, armpit, chest and abdominal region of the body and have been able to perform the function as the first layer of defense.
The Lymph nodes have been consisted of the lymph fluid that has been able to entrap the bacteria and kill them. Thus, option C is correct.
For more information about the lymph nodes, refer to the link:
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In the following reaction, how many grams of H2O are produced if 2.00 g of N2H4 react? N2H4 + 3 O2 ---> 2NO2 + 2H2O
Answer:
2
Explanation:
From this equation, 2 grams are produced.
The mass of H₂O produced from the reaction is 2.25 g
We'll begin by calculating the mass of N₂H₄ that reacted and the mass of H₂O produced from the balanced equation.
N₂H₄ + 3O₂ —> 2NO₂ + 2H₂O
Molar mass of N₂H₄ = (2×14) +(4×1) = 32 g/mol
Mass of N₂H₄ from the balanced equation = 1 × 32 = 32 g
Molar mass of H₂O = (2×1) + 16 = 18 g/mol
Mass of H₂O from the balanced equation = 2 × 18 = 36 g
SUMMARY
From the balanced equation above,
32 g of N₂H₄ reacted to produce 36 g of H₂O.
Finally, we shall determine the mass of H₂O produced by the reaction of 2 g of N₂H₄From the balanced equation above,
, 32 g of N₂H₄ reacted to produce 36 g of H₂O.
Therefore,
2 g of N₂H₄ will react to produce = (2 × 36) / 32 = 2.25 g of H₂O
Thus, the mass of H₂O produced from the reaction is 2.25 g
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What might happen if you mixed a strong acid with an equally strong base?
A.You would see an explosive chemical reaction.
B.The acid would destroy the base.
C.The base would destroy the acid.
D.You'd wind up with a pH-neutral salt and water.
Answer:
D
Explanation:
When you mix a strong acid and a strong base : ( D ) You will wind up with a pH-neutral salt and water
The mixture of a strong base and an equally strong acid results in a neutralization reaction, because at the point of equivalence the base and acid will completely neutralize each other.
The mixture solution will have a pH value of 7 and the end products will an ionic salt and water.
Hence we can conclude that When you mix a strong acid and a strong base , you will wind up with a pH-neutral salt and water.
Learn more : https://brainly.com/question/23008798
training doctors to recognize child abuse and explain how you could apply it to teaching. Write a short paragraph, using complete sentences with proper grammar, spelling, and punctuation.
Answer: E
Explanation:
Why did the increase in consumerism occur in the Roaring Twenties?(1 point)
A. There were new technologies and new innovations to drive the sale of goods, since people could afford them.
B. Improvements in technology made life easier for all people.
C. Machines and robots were used on assembly lines, making production more efficient.
D. People were tired of the economy only producing necessary supplies.
Answer:
A. There were new technologies and new innovations to drive the sale of goods, since people could afford them
Explanation:
Which of the following accurately describes metallic bonding?
A. electrons sea of delocalized
B. electrons are shared between atoms
C. electrons are transferred between atoms
D. electrons are released as beta particles
The answer is not C that's all I know. Please answer with explanation if you know.
Answer:
A
Explanation:
points)
(06.01 LC)
Based on the kinetic theory, which statement is true? (4 points)
A
Matter consists of only large molecules.
B
Matter is made up of only charged particles.
C
The particles of matter have zero kinetic energy and potential energy.
D
The particles of matter are arranged in different ways for the different state.
Answer:
D .The particles of matter are arranged in different ways for the different state.
Explanation:
The kinetic molecular theory is used to explain the forces between molecules and the energy the molecules possesses.
One of the key postulate of this theory is that;
The particles of molecules are continual state of motion. They posses kinetic energy. In gas, the particles are random and moves in a straight line motion. Liquids are less random and only slide past one another. Solids have a restricted space and the molecules are free to move about.Therefore, we can see that the particles of matter are arranged in different ways for different state.
239
239
-
93Np
94Pu + c
Answer:4>34.1>56
Explanation:ez
25 pts
3. Describe the subatomic structure of the nucleus, including the structure of each nucleon. Draw a picture.
Describe the forces that hold the nucleus together and draw them on your diagram.
Explain how beta emission works
Answer:
2 circles one proton and one nucleon.draw quarks within each. strong nuclear force within protons between quarks and residual strong force between proton and nucleon (up,up,down in proton)
Explanation:
What is the second life cycle stage during complete metamorphosis of insects?
O A) The eggs hatch into larvae.
OB) The eggs hatch into nymphs.
OC) Nymphs stop molting and are adult sized.
OD) Larvae make hard, protective cases around themselves during the pupal stage.
Answer:
They hatch into larvae.
Explanation:
A block of lead displaces 50.5ml of water. The block weighs 698 g. From this
information, calculate the density of lead.
Answer:
13.82 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{698}{50.5} \\ = 13.8217...[/tex]
We have the final answer as
13.82 g/mLHope this helps you
What is the cost to drive to Los Angeles from San Francisco a distance of 405 miles if the cost of gasoline is $2.90 a gallon and the car get 25 miles per gallon of gas?
Answer: $46.98
Explanation:
The distance to drive to Los Angeles from San Francisco is 405 miles. Since the car get 25 miles per gallon of gas, for 405 miles, the car will use:
= 405/25 = 16.2 gallons
Since the cost of gasoline is $2.90 a gallon and the car will use 16.2 gallons. The cost will be:
= $2.90 × 16.2 gallons
= $46.98
What is the density of an object (g/cm) that has a mass of 2.78 g & a volume of 10.0
cm3?
Answer:
The answer is 0.28 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{2.78}{10} \\ = 0.278[/tex]
We have the final answer as
0.28 g/cm³Hope this helps you
Answer:
p = 0.278 g/cm3
Explanation:
How much eat is absorbed when 50.0g of water changes from 25.0 Celsius to 37.0 Celsius?
Please help me I don’t understand this !!!
Answer:
The real answer for a is-He(helium)4,002602
The answer for b is-Mg(Magnesium) 24.305
Which of these mixtures is a suspension?
A. salad dressing
B. Gelatin
C. whipped cream
D. apple juice
Answer:
D. apple juice
Explanation:
How many moles are present in 2.3 x 1023 molecules of NH3?
Answer:
0.38 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{2.3 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{2.3}{6.02} \\ = 0.382059...[/tex]
We have the final answer as
0.38 molesHope this helps you