Solid-
shape-retains a fixed volume and shapenot easily compressibledoes not flow easily , Particles in a solid are tightly packed, usually in a regular pattern. Particles in a solid vibrate (jiggle) but generally do not move from place to place.liquid-
shape-assumes the shape of the part of the container which it occupiesnot easily compressibleParticles in a liquid are close together with no regular arrangement. Particles in a liquid vibrate, move about, and slide past each other.Gas-
shape-assumes the shape and volume of its containercompressibleParticles in a gas are well separated with no regular arrangement. Particles in a gas vibrate and move freely at high speeds.Plasma-
shape-variable volume and shapePlasma is slightly different from the other phases of matter, in that the high temperatures cause the atoms/particles to break apart into electrons and nuclei. This mixture of electrons and nuclei act similarly to gas particles, moving freely and have no distinct arrangement.what's Electro magnetic radiation?
Answer:
a kind of radiation including visible light, radio waves, gamma rays, and X-rays, in which electric and magnetic fields vary simultaneously.
A gas occupies a volume of 131.0-mL at 165.2-kPa. What volume will the gas occupy at 170.8-kPa if the temperature remains the same?
The relationship between the pressure and the volume of the gas at a constant temperature is given by Boyle's law. The volume, of the gas at 170.8 kPa is 126.70 mL.
What is Boyle's law?Boyle's law states the inverse relationship between the pressure and the volume of the gas. The formula for the law can be given by:
[tex]\rm P_{1}V_{1} = P_{2}V_{2}[/tex]
Given,
Initial pressure = 165.2 kPa
Initial volume = 131.0 mL
Final pressure = 170.8 kPa
The final volume is calculated as:
165.2 * 131.0 = 170.8 * V
V = 126.70 mL
Therefore, the final volume of the gas is 126.70 mL.
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what happens when you mix hydrogine, potassium and sodium
Answer:
-
Explanation:
As the piece of metal skitters across the surface of the water in a beaker and — particularly in the case of potassium — it appears to catch fire, it is not obvious that the explanation for both phenomena lies in the production of hydrogen gas.
WILL MARK BRAINLIST!! A chemist weighs a steel cylinder of compressed oxygen, O2, and finds that it has a mass of 1027.8 g. After some of the oxygen is used in an experiment, the cylinder has a mass of 1023.2 g. How many moles of oxygen gas are used in the experiment?
When answering this question include the following:
Explain how you found the mass of oxygen gas.
Explain how to find the molar mass of the compound.
Explain how many significant figures your answer needs to have.
The numerical answer
Answer:
0.14376 moles O₂
Explanation:
To find the amount of moles lost, (1) convert the grams O₂ before to moles (via molar mass from periodic table), then (2) convert the grams O₂ after to moles, then (3) subtract the moles O₂ after from the moles O₂ before.
Molar Mass (O₂) = 2(15.999) g/mol
Molar Mass (O₂) = 31.998 g/mol
Before Experiment:
1,027.8 grams O₂ 1 mole O₂
-------------------------- x ---------------------- = 32.121 moles O₂
31.998 grams
After Experiment:
1,023.2 grams O₂ 1 mole O₂
-------------------------- x ---------------------- = 31.977 moles O₂
31.998 grams
Moles Before - Moles After = Moles Lost
32.121 moles - 31.977 moles = 0.14376 moles O₂
The number of significant figures is determined by the significant figures of the values given. Both of the given values (1,027.8 and 1,023.2) have 5 sig figs. Therefore, the answer should also have 5 sig figs.
1 Defing polymerization
Answer:
Polymerization, any process in which relatively small molecules, called monomers, combine chemically to produce a very large chain-like or network molecule, called a polymer. The monomer molecules may be all alike, or they may represent two, three, or more different compounds.
Explanation:
:^)
Water’s property of surface tension is due to _____.
A. capillary action
B. solubility
C. cohesion
D. adhesion
E. All of the above
Answer:
C. cohesion
Explanation:
The cohesive force between liquid molecules are responsible for the phenomenon known as surface tension
When you insert a new slide in a presentation, where is it placed in relation to the existing slides?
When we insert a new slide in a presentation, it is placed next or below in relation to the existing slides.
Where should the new slide placed in relation to the existing slides?When we want to open a new slide we will Click on the New Slide button located on the Home tab in the Slides group. The new slide should appear below the selected slide.
So we can conclude that When we insert a new slide in a presentation, it is placed next or below in relation to the existing slides.
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importance of mole ratio in solvey process
Answer:
Sry i accidently clicked on ''SAVE''.
U can remove it or report it...
Explanation:
What are some applications of fission reactions? as a zero-waste energy source for generating large amounts of heat for creating stable elements from unstable ones for creating new, heavier elements as the energy source in nuclear weapons
Some applications of fission reactions are as a zero-waste energy source for generating large amounts of heat and as the energy source in nuclear weapons.
What are nuclear fission reactions?Nuclear fission reactions are reactions in which the nucleus of heavier atoms are split into two or more atoms of smaller nucleus with the release of energy and radiation.
Some of the applications of fission reactions are as a zero-waste energy source for generating large amounts of heat and as the energy source in nuclear weapons.
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Which type of wave pushes the medium in the direction of the wave? *
A. transverse wave
B. compression wave
C. neither A nor B
D. both A and B
Answer:
Neither because it’s a longitudinal wave that is supposed to be the answer
Explanation:
For each reaction below, use the drop-down menus to select which compound will form a precipitate. Note: It is possible that no precipitates form.
Na2S + Cd(NO3)2 → CdS + 2NaNO3
FeCl3 + 3KOH → 3KCl + Fe(OH)3
Na2CO3 + Ba(NO3)2 → BaCO3 + 2NaNO3
Answer:
1. Cadmium sulfide
2. Iron (III) hrydroxide
3. Barium carbonate
1. Cadmium sulfide
2. Iron (III) hydroxide
3. Barium carbonate
These three will form a precipitate in the respective reactions.
What is a precipitate?
In chemistry, a solid is formed by a change in a solution, often due to a chemical reaction or change in temperature that decreases the solubility of a solid.
[tex]Na_2S + Cd(NO_3)_2[/tex] → [tex]CdS + 2NaNO_3[/tex]
cadmium sulfide will form a precipitate.
[tex]FeCl_3 + 3KOH[/tex]→ [tex]3KCl + Fe(OH)_3[/tex]
iron (III) hydroxide will form a precipitate.
[tex]Na_2CO_3 + Ba(NO_3)_2[/tex] → [tex]BaCO_3 + 2NaNO_3[/tex]
barium carbonate will form a precipitate.
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5. Why does temperature go down when you remove CO2?
Answer:
It is harmful gas which cause global warming
How do scientists organize dinosaur bones? By type and size. By size and location. By location and type.
Answer:
I'm pretty sure by type and size (I might be wrong).
Joanne added iron filings to copper sulphate solution. she observed the reaction after one week. what is the name of the compound formed in this reaction?
The iron filings react with copper sulfate, the copper is displaced and iron sulfate results.
Copper sulfate + Iron reactionThe reaction between iron filings and copper sulfate is represented by the equation below:
[tex]Fe + CuSO_4--- > FeSO_4 + Cu[/tex]
The iron filings displace the copper from copper sulfate to form iron sulfate. Thus, elemental copper and iron sulfate are formed.
Iron is able to displace copper from copper sulfate because iron ranks higher than copper in the reactivity series.
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what is the difference between soft water and hard water
Answer:
soft water can leath with soap whiles hard water cannot be leathers with soap
Answer:
Hard water is water with excess calcium and magnesium, while soft water lacks harsh minerals that can hurt your body.
Explanation:
Also, in hard water, soap is not so effective (little or no foam) and in soft water soap is easily effecive (foams easily).
When cooking in a convection oven, for best results you place your food in the center of the oven. This is because convection is energy transfer
A. by currents of moving liquid or gas
B. from a reaction system to its surroundings
C. by direct matter contact
D. by electromagnetic waves
This is because convection is energy transfer by currents of moving liquid or gas.
What is heat transfer by convection?
Heat transfer by convection is the transfer of heat from one place to another due to the movement of fluid.
When cooking in a convection oven, for best results you place your food in the center of the oven, this is because convection is energy transfer by currents of moving liquid or gas.
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This is because convection is a type of energy transfer by currents of moving liquid or gas (Option A).
What is convection?Convection is a physical natural phenomenon associated with energy transfer through a fluid.
In convection, a suitable fluid that produces what transfer can be for example air and/or water.
In conclusion, this is because convection is energy transfer by currents of moving liquid or gas (Option A).
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Identify the correct type of heat transfer for A, B, and C in the picture. Using the picture, cite evidence for your choices.
The correct type of heat transfer for A, B, and C are conduction, convection and radiation respectively.
What is heat transfer?Heat transfer is a process in which amount of heat will be transferred from one object to any other object by various means.
In type A, heat is transferred through conduction process as in this transfer takes place due to direct contact of particles.In type B, heat is transferred through the convection process as in that process transfer of heat takes place through the medium.In type C, heat transfer done by the radiation as in that transfer through empty space.Hence at A, B and C heat transfer done through conduction, convection and radiation respectively.
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Answer:
heat transfer for A, B, and C are conduction, convection and radiation respectively.
hope you like it
A semiconductor:
A.
always allows charge to flow.
B.
never allows charge to flow.
C.
cannot be used at normal temperatures.
D.
has characteristics between conductors and insulators.
Answer:
D. has characteristics between conductor and insulator
What is the molality of a solution in which 13.7 grams of nacl have been dissolved in 500 grams of water?
Answer: 0.5 M
Explanation:
molarity = (moles of solute)/(liters of solution)
To find liters of solution, we can convert the 500 grams of water to liters, which is 0.5 L.The formula mass of NaCl is about 58.44 g/mol, so 13.7 grams is about 13.7/58.44 = 0.234 mol.Hence, the molarity is (0.234)/(0.5) = 0.5 M (to 1 s.f.)
) experimental evidence indicates that the nucleus of an atom
a) contains most of the mass of the atom
b) contains a small percentage of the mass of the atom
c) has no charge
d) has a negative charge
d) This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.
What is the temperature, in degrees Celsius, of a substance with a temperature of 49K?
If you could travel to any TIME PERIOD, when would go and why.
Answer:
I Would Go Back To When There Were Cavemen Because I Would Love To See How Things Went On And How Women/Men Handled Themselves
Explanation:
Why Would I Travel To When Cavemen Were Here?
Because I Have A Fuji Film And I Would Love To Come Back To This Day And Show Everyone That Cavemen/Dinosoars ARE Real
Part D
Based on your research, which source of energy do you think best meets the needs of society? Defend your answer in 50 to 100 words.
Energy is the fundamental need for lives. Fossil fuel is the energy source that is most needed in society. It is now replaced with solar energy as fossil fuels are nonrenewable resources.
What is the non-renewable and renewable source?Nonrenewable resources are energy sources that are finite in amount and get depleted after some time as it takes millions of years to produce these resources. Fossil fuels though are needed but are nonrenewable and cause pollution.
Solar energy is a renewable source that is present in abundant and infinite quantity and does not get depleted fast after they are used excessively. They are also environmentally friendly and do not produces much pollution.
Therefore, fossil fuel and solar energy are the most demanded sources.
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why might it be unwise to drink water straight from a pond
Answer:
it is because of the bacteria and different things that go into waters such as ponds, rivers, lakes, seas, oceans, streams, and other body of waters and I should also add the chemicals that go into them as well
Explanation:
,.,.,.,.,,.,.,..,,.,.,.,..,,..
In an ionic bond, metals lose electrons to become _____.
Answer:
In an ionic bond, metals lose electrons to become Cations.
Explanation:
Metal atoms lose electrons to form positive ions (cations).
How much sample will remain after 40 days for as 200 g sample of Radon-222? The half-life of Radon-222 is 4 days.
Answer:
[tex]\boxed{N_t =0.1953125 \: grams}[/tex]
Explanation:
Formula:
[tex]N_t = N_0( { \frac{1}{2} })^{ \frac{t}{t_ \frac{1}{2} } } [/tex]
Where Nt is the amount of substance remaining after time t,
N0 is the amount of substance at time t = 0,
t is the time at which we have to find out how much substance disintegrated from t = 0 to t = t
& t_1/2 is the half life corresponding radioactive sample.
Given:
N0 = 200g
t= 40 days
t1/2 = 4 days
To find:
Nt =?
Solution:
Substituting given data in above formula,
[tex]N_t = N_0( { \frac{1}{2} })^{ \frac{t}{t_ \frac{1}{2} } } \\ N_t = 200( { \frac{1}{2} })^{ \frac{40}{4 } } \\ N_t = 200 \times 0.0009765625 \\ \boxed{N_t =0.1953125 \: grams} [/tex]
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How many grams of sodium chlorate(nacio3) are in 1.23 x10^23 representative particles?
Answer:
About 21.7 grams.
Explanation:
To find the mass of a sample of sodium chlorate (NaClO₃) given the amount of particles present, we can convert from particles to moles, and moles to mass using its molecular weight.
The molecular weight of sodium chlorate is:
[tex]\displaystyle \begin{aligned} \mathcal{M}_\text{NaClO$_3$} &= (22.99 + 35.45 + 3(16.00)) \text{ g/mol} \\ \\ & = 106.44\text{ g/mol} \end{aligned}[/tex]
And recall that in one mole of any substance, there are 6.02 × 10²³ of it. Hence:
[tex]\displaystyle \begin{aligned} 1.23\times 10^{23} \text{ NaClO$_3$} &\cdot \frac{1\text{ mol NaClO$_3$}}{6.02\times 10^{23}\text{ NaClO$_3$}} \cdot \frac{106.44\text{ g NaClO$_3$}}{1\text{ mol NaClO$_3$}} \\ \\ &= 21.7 \text{ g NaClO$_3$} \end{aligned}[/tex]
In conclusion, there are about 21.7 grams of sodium chlorate.
A species that has experienced a severe bottleneck event would be expected to _______. a. be better able to adapt to changing environmental pressures b. have few instances of inbreeding c. be more susceptible to disease and famine d. retain significant genetic diversity
Answer:
hi the answer is C
Explanation:
hope i helped :)
Answer:
be more susceptible to disease and famine
Explanation:
Green plants are primary consumers. True False
Answer:
The answer is False beacuse, plant are called producers because they make their own food.
