if 3.8 g of cu3(po4)2(s) was recovered from step 1, what was the approximate [cu2 ] in the original solution? (the molar mass of cu3(po4)2 is 381 g/mol.)

Answer:

the final mole of the flexible container = 12.92 moles

Explanation:

Given that :

initial volume of a flexible container = 6.13 L

initial mole of a flexible container = 6.51 mol

final volume of a flexible container = 18.3 L

final mole of a flexible container = ???

Assuming the pressure and temperature of the gas remain constant, calculate the number of moles of gas added to the container.

Therefore,

\(n= \dfrac{V_2*n_1}{V_1}\)

\(n= \dfrac{18.3*6.51}{6.13}\)

n = 19.43

\(n=n_1+n_2\)

19.43 = 6.51 + n₂

n₂ = 19.43 - 6.51

n₂ = 12.92 moles

Thus; the final mole of the flexible container = 12.92 moles

Answer:

Ver explicación

Explanation:

El método científico se refiere al patrón establecido de resolución de un problema científico. Los siguientes son pasos importantes en el método científico;

Haz una observación.

formular preguntas relevantes.

elabore una hipótesis que pueda ser probada.

Diseña un experimento.

Prueba la hipótesis usando tu diseño experimental.

Teniendo en cuenta ambos escenarios, el último caso en el que estudiantes de diferentes capacidades trabajan juntos para resolver un problema refleja mejor el método científico porque pueden hacerse preguntas entre sí y llegar a hipótesis comprobables que pueden demostrarse como verdaderas o falsas mediante experimentos.

Explanation:

Total distance (d) = 560 meters

Time taken (t) = 25 seconds

Average speed

= d/ t

= 560/ 25

= 22.4 m/s

Hope it will help :)

Answer:

22.4 m/s

Explanation:

Answer:

15.7g

Explanation:

mass percent=mass of element/mass of compound *100

39.34=unknown(x)/40g×100

39.34=5x/2

multiplying both sides by 2,we get

5x=78.68

devide by 5 on both sides

x=15.74g Na

Answer:

The plates can be thought of like pieces of a cracked shell that rest on the hot, molten rock of Earth’s mantle and fit snugly against one another. The heat from radioactive processes within the planet’s interior causes the plates to move, sometimes toward and sometimes away from each other.

Oxygen release the energy stored in nutrients to provide heat and energy functioning Outside respiratory entails known as external respiration.

The use of oxygen to release energy stored in nutrient molecules, along with, glucose. Sound is produced via air being expelled from the lungs and passed over the larynx. Few organs may be on more than others, such as the brain, or muscular tissues if you are exercising, consequently they get hotter. This needs to be unfold around the body and this is completed by using the blood, which heats a few organs and cools others.

Consumption in extra than necessary amounts is stored as glycogen within the liver and muscle cells, and in fat cells. excess adipose storage can result in weight problems and severe fitness problems. ATP is the energy foreign money of the cell and is received from the metabolic pathways.

There is an change of gases among the lungs and the blood. that is known as external respiration. The blood transports the gases to and from the tissue cells. The trade of gases between the blood and tissue cells is inner respiratory.

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The density of the object can be calculated using the formula: Density = Mass/Volume.

We know the mass of the object is 1.2 g.

The volume of water displaced by the object is 0.0100 L or 10.0 mL.

Therefore, the density of the object is:

Density = Mass/Volume = 1.2 g/10.0 mL = 0.12 g/mL

So the correct answer is .12 mL.
to help you calculate the density of the object using the given information. To find the density, we'll use the formula:

Density = Mass / Volume

Here, the mass of the object is 1.2 g, and the volume of water displaced by the object is 0.0100 L (or 10 mL, since 1 L = 1000 mL).

Step 1: Convert the volume of water displaced to milliliters (mL):
0.0100 L × 1000 = 10 mL

Step 2: Use the density formula with the given mass and volume:
Density = 1.2 g / 10 mL

Step 3: Calculate the density:
Density = 0.12 g/mL

So, the density of the object is 0.12 g/mL.

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Answer:

In a titration, you determine an unknown concentration of a sample by adding a second reactant of known concentration. In many titrations, you use a chemical called an indicator, which lets you know when the titration finishes.

Explanation:

Answer:

\(2Mg^0 + O_2^0\rightarrow2Mg^{2+}O^{2-}\)

Explanation:

Hello there!

In this case, according to the rules for the oxidation states in chemical reactions, it is possible to realize that lone elements have 0 and since magnesium is in group 2A, it forms the cation Mg⁺² as it loses electrons and oxygen is in group 6A so it forms the anion O⁻²; therefore resulting oxidation numbers are:

\(2Mg^0 + O_2^0\rightarrow2Mg^{2+}O^{2-}\)

Best regards!

According to the given statement if it started at the surface The ball's new volume is 0.48 L.

Temperature is a unit used to represent hotness or coolness on any of a number of scales, notably Fahrenheit and Celsius. According to temperature, heat energy will naturally move from a hotter (body with a higher temperature) to a warmer (body with a lower temperature) (one at a lower temperature)

P1 = 752. 0 mmHg

P2 = 2943 mmHg

V1 = 2.00 L

V2 = X

(change to kelvin)

T1

= 20°c + 273

= 293 K

T2

= 0.245 °c + 273

= 273.245 K

V2, unknown

P1 V1 / T1 = P2 V2 / T2 is the equation.

Solution:

(2943 mmHg) (x) / 273.245 K

= (752.0 mmHg) (2.00 L) / 293 K

(2943 mmHg) (x) / 273.245 K is equal to (1504) / 293 K.

(Cross Multiply)

= (1504)(273.245K)/(293K)(2943mmHg) (x)

= 410 960.48 / 862 299 (x) 

X = 0.4765 L

V2 = 0.48 L

The ball's new volume is 0.48 L.

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Answer:

Explanation:

The objects velocity will decrease because the force is opposing its motion

Answer:

D a substance that increases the rate of a reaction without being used up itself in a reaction.

Explanation:

Examples are

ammonia synthesis ==> iron

sulfuric acid manufacture ==> nitrogen(II) oxide, platinum

cracking of petroleum==> zeolites

hydrogenation of unsaturated hydrocarbons ==> nickel, platinum, or palladium

I hope it helps

Answer:

Hey there!

The correct answer would be D. "a substance that increases the rate of a reaction without being used up itself in a reaction."

Hope this helps :)

It is true that according to Hubble's law, the farther away a galaxy is, the faster it is moving away from us.

It is true that the formation of a star occurs when nuclear fusion begins to fuse light elements into heavier ones;

The distance to the nearest stars can be determined by parallax, the apparent shift of a start against background stars observed as the earth moves along its orbit. (Option B)

Based on the accompanying H-R Diagram, the type of start that has the greatest temperature is the blue giants (Option C)

Two hydrogen atoms come together in a nuclear fusion reaction to produce Helium Gas. (Option A).

Hubble's law, which essentially states that the velocity of a galaxy (or, as it is commonly plotted, its redshift) is precisely proportionate to its distance, also reveals crucial information about the condition of the universe. There should be no relationship between distance and velocity if the cosmos is static and unchanging.

Hubble's law is the physical cosmology observation that galaxies move away from Earth at a rate proportionate to their distance. In other words, the farther they are from Earth, the quicker they are travelling away.

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We have that the arrangement of particles of NaCl is most ordered in a sample of

NaCl(s)  

i.e solid NaCl

From the question we are told

The arrangement of particles is most ordered in a sample of  

1. NaCl(aq)

2. NaCl(l)  

3. NaCl(g)  

4. NaCl(s)

NaCl Generally known as sodium chloride or salt exist in four main states as shown

1. NaCl(aq)

2. NaCl(l)  

3. NaCl(g)  

4. NaCl(s)

Mow in a subject of its arrangement of particles we can see that as its state changes from gaseous through to solid it gains in form and arrangement of particles

Therefore

The arrangement of particles of NaCl is most ordered in a sample of

NaCl(s)  

i.e solid NaCl

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The synthesis of nylon requires solutions of 5% hexamethylenediamine and 5% adipoyl chloride. This polymer will form between layers of the solutions. To remove the nylon, one can choose to dissolve it in the 5% hexamethylenediamine or in the 5% adipoyl chloride.

Nylon, a synthetic polymer, is produced from the combination of adipoyl chloride and hexamethylenediamine. This process is called the synthesis of nylon. Nylon is a highly flexible material that is resistant to wear and tear, as well as chemical and heat degradation. The synthesis of nylon requires solutions of 5% hexamethylenediamine and 5% adipoyl chloride, respectively, for the two reactants to be mixed together.

The reaction between these two chemicals is exothermic, which means that it releases heat. The heat generated in the reaction drives the reaction forward, resulting in the formation of nylon. The chemical formula for nylon is (-CO-NH-)n, where n is a large number that reflects the degree of polymerization. To remove the nylon, it is soaked in an acid solution. The acid dissolves the nylon, separating it into its constituent components, which can then be purified and reused.

The most commonly used acid for this process is hydrochloric acid. The process of removing nylon from its solvent is called the "acid-catalyzed hydrolysis of nylon." Nylon is used in a variety of applications, including textiles, packaging materials, and electrical components, among others. Its properties make it ideal for use in applications that require durability, strength, and flexibility. Nylon's physical properties, including its resistance to heat and chemical degradation, make it ideal for use in applications such as electrical insulation, packaging materials, and textiles.

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Answer:

The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change

Hope that helps

Answer:

microwaves

Explanation:

matter has anyting has mass and takes up space. any objec you can touch,taste,or smell is matter

Answer:

Helium is less dense. Because helium is lighter than air, a helium balloon rises, just as an air bubble rises in more dense water

Explanation:

Also why not. It just is.

Answer:

This is due to the fact that helium has a lower density. A helium balloon rises like an air bubble in more dense water because helium is lighter than air. Another gas lighter than air is hydrogen, which is even lighter than helium.

Explanation:

According to the IUPAC nomenclature, the name of the compound is 2-ethyl non-6-ene.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.

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Answer: 2 : 1

Explanation:

Cation :

Ca - calcium = atomic number = 20

Electron dot configuration : 2, 8, 8, 2

Ca losses 2 electrons in its outermost shell and thus has a charge of 2+ in other to attain a stable octet state.

Anion:

F - has 7 valence electrons and thus needs 1 electron to achieve a stable octet state, hence it accepts one electron has has a charge of (-1)

Therefore,

Ratio of cation (+) to negative (-) = 2 :1

Answer:

The area is important for climate science research because they can look at the glaciers and see over the years what is happening with them, are they multiplying or are they decreasing and if so at what rate.

Answer:

Melting glaciers are causing sea levels to rise. It’s important to study natural conditions in the Northern Patagonian Ice Field because the landscape there is dynamic and the effects of climate change can easily be seen. The retreat of the Nef Glacier and the disappearance of icebergs on the lake are evidence of rising temperatures and climate change.

Explanation:

Answer:

element

Explanation:

A metal is an element that readily forms positive ions (cations) and has metallic bonds. Metals are sometimes described as a lattice of positive ions surrounded by a cloud of delocalized electrons

Answer:

Metal is an element because it consist of type of atom and can't be divided into other substance .

Answer:

2Ag + Cl₂ → 2AgCl

Most pots and pans that are used for cooking made out of metal because of high conductivity and low resistance.

Most pots and pans that are used for cooking made out of metal because metals are good conductors of heat. This means that metal get hotter quickly as compared to other materials due to its high conductivity and low resistance characteristics.

So we can conclude that most pots and pans that are used for cooking made out of metal because of high conductivity and low resistance.

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Explanation:

from positive to negative terminal

There will be a flow of current from the battery through the wires to the bulbs.

The term circuit speaks of a path that is designed for the flow of current. We know that current often flows from the battery to other circuit components.

It then follows that in the circuit as shown, there will be a flow of current from the battery through the wires to the bulbs.

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The correct option is B. Remain the same.

When converting a pressure from units of torr to millimeters of mercury, the numeric value will remain the same.

Both torr and millimeters of mercury (mmHg) are units of pressure that are equivalent to each other.

The numerical value of the pressure will not change when converting between these two units.

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