Answer:
the question is bogus
see explanation
Explanation:
explain why the pressure in a sealed container of gas decreases when heat is added to the system?
when you add heat to the gas molecules in a sealed container, the molecules move faster and the pressure INCREASES!!!
IT DOES NOT DECREASE
PV =nrT
IF THE O THEVOLUME IS FIXED (REIN A SEALED CONTAINER) AND THE NUMBER OF MOLES n is FIXED, THEN THE PRESSURE IS DIRECTLY PROPORTIONAL THE TEMPERATURE
THE GREATER T, THE GREATER P
a chemical compound in which ions are held together in a lattice structure by ionic bonds
Answer:
Ionic compounds contain ions and are held together by the attractive forces among the oppositely charged ions
Explanation:
Common salt (sodium chloride) is one of the best-known ionic compounds. Molecular compounds contain discrete molecules, which are held together by sharing electrons (covalent bonding).
When particles in a solid or liquid move faster they move slightly further apart, what is this called?
When particles in a solid or liquid move faster they move slightly further
apart and is referred to as Elastic collision
Liquids and gases possess more kinetic energy than solids which is why
there is movement of its atoms in a system. Gas have the highest kinetic
energy and solids have the lowest. When the atoms move ,they collide with
one another which pushes the particles further apart.
The atoms in liquid and gas exhibit vibrational(rotational) motion which brings about movement and collision of the particles.
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When bacon is cooked, a solid fatty residue remains in the pan after cooling. What can be said about the fat in bacon based on this observation
Answer:
The fatty acids are mostly saturated.
Explanation:
A mixture of molten salts contains the following ions: Mg2 , Cu2 ,F-, Cl-, Br-. Which ion will be oxidized first, when the mixture undergoes electrolysis.
When the mixture of ions undergoes electrolysis, Br- is most easily oxidized.
Electrolysis refers to the decomposition of a solution by the passage of direct current through it. During electrolysis, a specie is oxidized and another specie is reduced since it is a redox reaction.
Among all the ions; Mg2+ , Cu2+ ,F-, Cl-, Br-, the ion that is most easily oxidized in Br- which is oxidized to Br2.
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What will happen to the density of the water if i put salt in it.
Answer:When salt is dissolved in fresh water, the density of the water increases because the mass of the water increases.
Explanation:
in hydrogen iodide __________________ are the most important intermolecular forces.
Answer:
dipole-dipole forces
Explanation:
The important intermolecular force in hydrogen iodide HI is dipole- dipole forces. This force is arising due to the partial charge separation and permanent dipole moment.
What is dipole-dipole force?There are various intermolecular forces which binds two atoms chemically to form a compound. Ionic bonding, covalent bonding, dipole -dipole force, hydrogen bonding, Van der Waals force etc are some of them.
Dipoles are opposite charges separated by a small distance. Dipole -dipole force is generated between the atoms when they have partial charge separation and this creates a permanent dipole moment.
Hydrogen is an electropositive atom and iodine is slightly electronegative. This difference in electronegativities leads to the bonded electrons more attracted towards iodine result in partial charge separation and dipole-dipole force.
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describe how fluids exert forces on objects
Explanation:
Fluids exert forces on objects because of many molecules of the fluid that continuously collide with the surfaces of the object immersed in the fluid. Squeezing a plastic mustard bottle forces mustard out the top because of the amount of force or pressure applied to it that results in mustard coming out.
When an object is immersed in a fluid, the fluid exerts an upward force known as buoyancy. The buoyant force is caused by the fluid's pressure on the object.
How does fluids exert forces on objects?The upward force exerted by fluids on all matter is known as buoyant force. Force According to Archimedes' principle, the buoyant force on an object in a fluid is an upward force equal to the weight of the fluid that the object replaces or displaces.
A submerged object's buoyant force is equal to the weight of the fluid displaced. By measuring the mass of an irregularly shaped object, this principle can be used to determine its volume and thus density.
Squeezing a plastic mustard bottle forces mustard out the top due to the amount of force or pressure applied to it, which causes mustard to come out.
Thus, Fluids exert forces on objects because their molecules constantly collide with the surfaces of the objects immersed in the fluid.
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What is the mass of 1 mol of 0 atoms to three significant figures?
Answer:
16.0 gms
Explanation:
what is the mass of 1 mole of O atoms to 3 significant figures
go to your periodic table.......O is element 8 and has an atomic mass of 15.999. to 3 significant figures, this rounds to 16.0
1 mole is the molar mass in grams
so 1 mole of O atoms has a weight of 16.0 gms
doy CORONITA a quien me ayude rapido que es un examen porfaaa
Answer:
thank you for the points
How to find formula for ionic compounds.
Answer:
I am using an example for this in this table it works for any other compound as well.
Here’s the second part to my science
Answer:
"powerhouse"- mitochondria
"stores spare parts"- vacuole
"surrounds the nucleus"- nuclear membrane
"controls the cell"- nucleus
"pathways"- endoplasmic reticulum
"inner layer"- cell membrane
"outer plant covering"- cell wall
"fills up the cell"- ctyoplasm
"collects light"- chloroplasts
"packages proteins"- golgi
"holds info"-chromosomes
"makes protein"-ribosomes
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Methods used to separate heterogeneous mixtures include the following: check all that apply. *
Decanting
Filtration
Sifting
Answer:
Filtration, Sifting and Decanting
Explanation:
Heterogenous mixtures can be seperated by filtration and sifting (Also known as sieving). Sifting is the process of parting a mixture using a sieve. Sifting is used to separate solid mixtures that contain molecules of varying sizes. Filtration is the process of separating a liquid from an insoluble solid. A common example is using a funnel and a coffee filiter to seperate the liquide from the insoluable solid. Although there are many other methods for filtration. You can also separate mixtures by decantation. Decantation is the process of separating a liquid from a solid/liquid by removing the liquid layer at the top from the layer of solid/liquid below.
What does it mean when an element turns into an ion?.
Answer:
When a neutral atom gains one or more electrons, the number of electrons increases while the number of protons in the nucleus remains the same. The result is that the atom becomes an anion—an ion with a net negative charge.
Explanation:
los hermanos Ana Victoria y José Leonardo están patinando en el hielo, con 25 y 20 kg respectivamente de masa, si Victoria empuja a Leo y este sale despedido con una aceleración de 2 m/s²
calcula la aceleración con que retrocede la niña, suponiendo que los patines no ofrecen resistencia al movimiento
Utiliando las leyes de Newton encontraremos que la aceleración de Ana es -1.6 m/s^2.
La segunda ley de Newton dice que:
F = m*a
Fuerza es igual a masa por aceleración.
La tercera ley de Newton dice que cuando dos objetos interactuan, cadan objeto ejerce una fuerza de igual magnitud pero opuesta direccion en el otro.
Ahora veamos como aplicar esto.
Sabemos que la niña empuja al niño, asumamos que con una fuerza F.
Tendremos entonces la ecuación:
F = 20kg*(2m/s^2) = 40N
Y por la tercer ley de Newton, esta misma fuerza (pero en opuesta dirección) se aplica a la niña, entonces tendremos:
-40N = 25kg*a
-40N/25kg = a = -1.6 m/s²
La aceleración con la que retrosede la niña es -1.6 m/s²
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which of the following statements about this reaction is true:
CH4+2O2-->CO2+2H2O+Heat
A. The reaction releases heat.
B. heat is absorbed by the reaction.
C. the reaction consumes water.
D.The reaction releases oxygen.
Explanation:?
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
The Correct statement is ~
A. The reaction releases heatAs we can observe, there's heat in product side of the given equation that shows - In the given reaction heat is released making it an exothermic reaction ~
I hope it helps ¡
[tex]\mathrm{✌TeeNForeveR✌}[/tex]
......................
Answer:
preciate you
Explanation:
Earth’s spheres interact in a system that makes up all of the matter, energy, and processes within Earth’s boundary. You learned about the different spheres in this lesson and how spheres are not isolated, but they interact. In the space below, explain how the biosphere relies on the other spheres for survival.
Answer:
Explanatthe tryposphereion:
True of False: The 8-Step Problem Solving Process was developed as an intended expansion of OODA Loop.
The 8-Step Problem Solving Process is vital to solving problems in an organized way and it's an extended form of OODA Loop. Therefore, it's logically true.
The 8-Step Problem Solving Process include the following:
Defining the problem.Clarifying the problem.Defining the goals.Identification of the root cause of the problem.Development of an action plan.Executing action plan.Evaluating the results.Continuous improvement.It should be noted that the 8-Step Problem Solving Process was developed as an intended expansion of the OODA Loop. Therefore, the statement is true.
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If i initially have a gas with a pressure of 84 kpa and a temperature of 350 c and i heat it an additional 230 degrees, what will the new pressure be? assume the volume of the container is constant.
Answer:
67.824
Explanation: You want to use the combined gas law equation (P1*V1)/(n1*T1)=(P2*V2)/(n2*T2). So first cross out what remains constant, so volume(V) and I assume moles (since it was not mentioned as a change). Then you can solve algebraically for the answer!
Hope this helped!
The new pressure will be 139.2 kpa .
What is the combined Gas Law?According to combined gas law,
[tex]\rm\dfrac{PV}{nT} = R[/tex]
In the Combined Gas Law,if we change either one of the variables the others will also change.
When the moles of the gas is constant , the above equation can be written as ,
[tex]\rm \dfrac{P'V'}{T'}= \dfrac{PV}{T}[/tex]
Given is P = 84kpa , T= 350⁰ C and T' = 350+230=580⁰ C , V=V' , P'=?
So we will substitute the values in the above formula keeping volume constant.
[tex]\rm \dfrac{P'}{T'}= \dfrac{P}{T}[/tex]
[tex]\rm\dfrac{P'}{580}= \dfrac{84}{350}[/tex]
[tex]\rm P' = \dfrac{84\times 580}{350}[/tex]
[tex]\rm P'= 139.2 \;kpa[/tex]
Therefore the new pressure will be 139.2 kpa .
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how long does vacuum sealed raw meat last in the freezer?
Answer:
Frozen Meats – Frozen raw meats that are properly vacuum sealed can be stored in the freezer from 1-3 years depending on the type of meat. However, raw meat that is not vacuum sealed will only last 1-12 months depending on the meat.
Explanation:
hop this helps
Answer: Six months or three years
Explanation: Frozen meats, poultry, and fish can last in the freezer for up to six months and when they are vacuum sealed, frozen meats can stay fresh and free from freezer burn for up to 3 years.
How does a phase change from solid to liquid occur in a substance?(1 point)
Answer:
As heat is added to solid water, the temperature increases until it reaches 0 °C, the melting point. At this point, the phase change, added heat goes into changing the state from a solid to liquid. Only when this phase change is complete, the temperature can increase.
hope this helps
Heat is responsible for the change of phase from solid to liquid state.
A phase change from solid to liquid occur in a substance by heating of that substance because the bonds present between solid particles can be broken down with the help of heat energy.
When the bond is heat at the temperature on which it is broken down, the solid particles are converted into liquid substance so we can conclude that heat is responsible for the change of phase from solid to liquid state.
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Which of the following are needed to calculate the percent yield? Select all that apply. Question 10 options: Theoretical yield Actual yield Excess yield Limiting yield
Both theoretical and actual yields would be needed to calculate percent yield.
The percent yield of a reaction is defined as the ratio of the actual yield to that of the theoretical yield. It can be mathematically expressed as:
percent yield = actual yield/theoretical yield x 100%
The actual yield is the amount of a specific product produced from a reaction while the theoretical yield is the stoichiometric amount of the same product.
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How many molecules of N 2 are produced by reacting 0.0024 grams of NaN 3 according to the equation: 3 CuCl(aq) 3 NaN 3(aq) ---> Cu 3N(s) 3 NaCl(aq) 4 N 2(g)
Answer:
4 molecules
Explanation:
In the products side of the equation, you see 4N2, this means there are 4 molecules of N2 that are produced by the reaction.
Describe how the suspects used the chemicals found at the crime scene to make the copper coins look silver.
The chemicals found at the crime scene although not mentioned must be Sodium zincate.
Discussion:
An interesting demonstration to show plating and alloys is the conversion of copper coins to silver look-alike coins.
A 'copper' coin when dipped into a solution of sodium zincate in contact with zinc. The coin is plated with zinc and appears silver in colour.
This is a common chemistry classroom trick.
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Write the balanced chemical equation for the reaction
of solid carbon with oxygen gas to form carbon monoxide gas.
Answer:
2C +O2 - COExplanation:
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The balanced chemical equation for the reaction of solid carbon with oxygen gas to form carbon monoxide gas is 2 C + O₂[tex]\rightarrow[/tex] 2 CO.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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how can you keep a cold drink cold without ice or a refrigerator
Answer:
snow and a cooler
Explanation:
so if its really cold out side put your drink out there.
which professional most likely uses x-ray technology a financial analyst or a dentist
Answer:
A dentist
Explanation:
Hope this helps
Work sheet science pls help
Answer:
1. -> D
2. -> E
3. -> G
4. -> A
5. -> H
6. -> B
7. -> C
8. -> J
9. -> F
10. -> I
Explanation:
I hope this helps you!
Be + O2 --> BeO
Balance this and what's the type of reaction?
Answer:
2Be + O2 = 2BeO
its a synthesis
Explanation:
A sample of a gas in a 4L container at 300K has a pressure of 1 atm. If the
temperature is increased to 600K and the volume is decreased to 2L , the
pressure is likely to be closest to which of the following? *
O 0.5 atm
1 atm
4 atm
2 atm
The final pressure of the gas in the container is 4 atm
From the question given above, the following data were obtained:
Initial volume (V₁) = 4 L
Initial temperature (T₁) = 300 K
Initial pressure (P₁) = 1 atm
Final temperature (T₂) = 600 K
Final volume (V₂) = 2 L
Final pressure (P₂) =?Using the combine gas equation, we can obtain the final pressure of the gas as illustrated below:[tex]\frac{P_{1} V_{1} }{T_{1}} = \frac{P_{2} V_{2}}{T_{2}}\\\\\frac{1 * 4}{300} = \frac{P_{2} * 2}{600} \\\\[/tex]
Cross multiply
300 × 2 × P₂ = 4 × 600
600 × P₂ = 2400
Divide both side by 600
[tex]P_{2} = \frac{2400}{600} \\\\[/tex]
P₂ = 4 atmTherefore, the final pressure of gas is 4 atm.
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