Suppose you add a cup of sugar to hot water and all of the sugar dissolves. then the water cools and some of the sugar is seen as a solid on the bottom of the beaker. explain why this happened.

Answers

Answer 1

Answer:

its becuz the water is not capable to disolve all the salt it has limits and ones it reaches its limit it wont have the ability to disolve any salt


Related Questions

What is the mass percent of Fe in iron(II) chloride

Answers

its

28.090%
hope its helpful >~

CaCO3(s) CaO(s) + CO₂(g)
4
3.25 mol CaCO3 decomposes
according to the reaction above.
What volume of CO2 gas is
produced once the gas cools to
STP?

Answers

Try 22.4 and see if that works


2.3 moles of CaBr2 contains how many molecules

Answers

Avogadro's law states that in every mole of a substance, there are [tex]6.022 \times 10^{23}[/tex] molecules.

This means that in 2.3 moles, there are [tex]2.3(6.022 \times 10^{23})=\boxed{1.4 \times 10^{24} \text{ (to 2 sf)}}[/tex]

How a reaction between colorless substances can produce a colored precipitate

Answers

A reaction between colorless substances can produce a colored precipitate by formation of new ionic compound.

What is an ionic compound?

An ionic compound is a compound that is made up of two elements, one metal and the other non metal, which are held together by an ionic bonding.

When reaction occurs between two colourless substances, colored precipitate results by formation of new ionic compound.

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How many electrons are in a ion that has 16 protons and 59 neutrons if it has negative 2 charge? ​

Answers

Hi there I believe it’s 18 please let me know if I’m wrong :)

how many atoms of of titanium are present in a sample containing 0.375 moles Ti

Answers

2.258302785 x [tex]10^{23}[/tex] atoms of titanium are present in a sample containing 0.375 moles of Ti.

What are moles?

A mole is defined as 6.02214076 × 10^{23} of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

To find the number atoms we need to multiply by 6.02214076 × 10^{23}.

0.375 moles x  6.02214076 × [tex]10^{23}[/tex]

2.258302785 x [tex]10^{23}[/tex]

Hence, 2.258302785 x [tex]10^{23}[/tex] atoms of titanium are present in a sample containing 0.375 moles of Ti.

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30 points!!!! Answer fast

EXPERIMENT: MAGNETISM Bar Magnet
1. Place the bar magnet on a table.
2. Put a sheet of glass or plastic over the magnet.
3. Sprinkle the iron filings over the sheet evenly.
4. On a separate paper, sketch the magnet. Show the lines made by the iron filings. Horseshoe Magnet
5. Place a horseshoe magnet on the table.
6. Put a sheet of glass or plastic over the magnet.
7. Sprinkle the iron filings over the sheet.
8. On a separate paper, sketch the magnet. Show the lines made by the iron filings. N Pole to N Pole
9. Place two bar magnets N pole to N pole with an inch between them.
10. Put a piece of glass or plastic over the magnets.
11. Sprinkle the iron filings over the glass or plastic.
12. On a separate paper sketch the magnets. Show the lines made by the iron filings. N Pole to S Pole
13. Turn one of the bar magnets around so the magnets are N pole to S pole with an inch between.
14. Sprinkle the iron filings over the glass or plastic.
15. On a separate paper sketch the magnets. Show the lines made by the iron filings.

From the information you have observed, determine the following:
What rule of magnetism is illustrated by the lines of the iron filings in Step 12?

What rule of magnetism is illustrated by the lines of the iron filings in Step 15?

Why was glass or plastic used to separate the filings from the magnets in the experiments?

Did the glass or plastic stop the passage of the magnetic lines of force?

Did the iron filings almost or completely bridge the open end of the horseshoe magnet?

Answers

The magnetism is either created inside a given element by passing some number of charges,Q across it or it is due to the interaction with a permanent magnet.

What is Magnetism ?

A physical phenomenon produced by the motion of electric charge, which results in attractive and repulsive forces between objects.

The magnet consists the characteristics of having an optimum amount of energy (P.E inside it) inside it.

As, the energy lines are either directed outwards from the north pole of the magnet, the south pole of the magnet consumes or absorbs the magnetic rays(energy lines) originated from the north pole of the magnet.

The right hand rule of magnetism is illustrated in the 12 point of the question.
As the right hand rule says that there will be a net amount of magnetic field around the conductor or any current carrying element in a specific direction.
Now, the current carrying direction of the wire is in perpendicular direction to that of the magnetic field created.

Point No.15 of the given question provides us the information regarding the idea of left hand rule of magnetism.
As, due to the contact between the  magnetic fields.

The fillings are separated from the magnets in the given experiment due to the fact there is a source for covering up the particles from getting too much exposed to the magnetic field. But, they are not able to stop the magnetic line of force,F from not penetrating its surface.

The iron fillings are present there to have a complete bridged form of connections between itself and the horseshoe magnet.
As the horseshoe magnet and the iron fillings are placed in a specified form of orientation inside the given space or region of interaction.

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Determine the quantity of each atom in a compound
1. CaCO3
2.3 BaF2
3.4 H₂PO4
4. Sr(OH)₂
5. 3 Al2(Cr₂O7)3

Answers

1. 5 atoms
2. 5 atoms
3. 11 atoms
4. 5 atoms
5. 18 atoms

An electron moved from shell n = 2 to shell n = 1. What most likely happened during the transition? (4 points)
A fraction of a photon was added.
A photon of energy was absorbed.
A fraction of a photon was removed.
A photon of energy was released.

Answers

i think it’s the fraction of a photon was removed

A 10.0 ml portion of 0.010 m hcl is diluted by adding it to100.0 ml of water. what is the ph of the solution

Answers

From the calculation, the pH of the solution after dilution is 3.

What is the pH?

The pH is the hydrogen ion concentration of the solution. Now we know that;

C1 =  0.010 m

V1 = 10.0 ml

V2 = 10.0 ml + 100.0 ml = 110 ml

C2 = ?

C1V1 = C2V2

C2 = C1V1 /V2

C2 =  0.010 m  * 10.0 ml / 110 ml

C2 = 0.00091 M

pH = -log[0.00091 M]

pH = 3

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What mass of solute will dissolve in 100g of water at the following temperatures?
• KNO3 at 70°C =
• NaCl at 100°C=
• NH₂Cl at 90°C=

Answers

[tex]KNO_3[/tex] at 70°C = 130 gram

NaCl at 100°C= 40 gram

NH₂Cl at 90°C= 70 gram

What is solubility?

Solubility is defined as the maximum amount of a substance that will dissolve in a given amount of solvent at a specified temperature.

Amount of a substance (called the solute) that dissolves in a unit volume of a liquid substance (called the solvent) to form a saturated solution under specified conditions of temperature and pressure. Solubility is expressed usually as moles of solute per 100 grams of solvent.

Hence,

[tex]KNO_3[/tex] at 70°C = 130 gram

NaCl at 100°C= 40 gram

NH₂Cl at 90°C= 70 gram

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hydrochloride acid +_________ zinc chloride +hydrogen​

Answers

Answer:

Hydrochloride acid + Zinc = Zinc Chloride + Hydrogen

Explanation:

When Hydrochloride acid and Zinc react, it results in the formation of Zinc chloride and hydrogen.

Hope I helped

How many atoms are present in 2.1 moles of Fe

Answers

Answer:

1.3 x 10²⁴ atoms Fe

Explanation:

To convert moles to atoms, you need to multiply your given value by Avogadro's Number. This causes the conversion to occur because Avogadro's Number exists as a ratio. It is the ratio that allows for the cancellation of units during multiplication. This is why atoms should be in the numerator of your conversion. The final answer should have 2 sig figs to reflect the given value.

Avogadro's Number:

1 mole = 6.022 x 10²³ atoms

2.1 moles Fe          6.022 x 10²³ atoms
---------------------  x  -------------------------------  =  1.3 x 10²⁴ atoms Fe
                                        1 mole


An atom contains one proton, one electron, and one neutron. Which two particles are most similar in mass?
O the neutron and the electron
O the proton and the electron
O the proton and the neutron
O the neutron and the atom

Answers

Answer:

the pro on and the electron

The proton and electron

which experimental technique was most likely used by the students to determine the rate of reaction?

Answers

The students can determine the rate of reaction by measuring change in concentration of reactant or product with time.

What is rate of reaction?

The rate of a reaction is the rate at which reactant molecules are used up or the rate at which product molecules are formed.

The rate of a reaction can be determined by measuring the change in concentration of the reactant at each given time in a reaction.

The rate of reaction can be also be determined by measuring the change in concentration of the product at each given time in a reaction.

Therefore, the students can determine the rate of reaction by measuring change in concentration of reactant or product with time.

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The Oxidation number of iron in the Complexion [Fe(CN) 6]³^- is what?​

Answers

+3

Hence, the magnetic behaviour of the complex is paramagnetic. The oxidation number of the central metal atom: The oxidation number of the metal iron is +3.

Answer:

the oxidation number of iron in the complexion is +3 or x=+3

How many grams Fe2O3 would be
required to make 187 g Fe?

Fe₂O3 + 3CO → 2Fe + 3CO₂

Answers

266.63g of Fe2O3 would be required to make 187 g Fe in accordance with the following equation: Fe₂O3 + 3CO → 2Fe + 3CO₂.

How to calculate mass?

The mass of a product or reactant can be calculated using stoichiometry as follows:

According to this question, iron oxide reacts with carbon monoxide as follows:

Fe₂O3 + 3CO → 2Fe + 3CO₂

1 mole of Fe2O3 produces 2 moles of Fe

Moles of Fe = 187/56 = 3.34mol

3.34/2 = 1.67 moles of Fe2O3 will be required to produce 3.34 moles of Fe.

mass of Fe2O3 = 1.67 mol × 159.69 g/mol = 266.63g

Therefore, 266.63g of Fe2O3 would be required to make 187 g Fe in accordance with the following equation: Fe₂O3 + 3CO → 2Fe + 3CO₂.

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Drag each tile to the correct location.

Classify the reactions as endothermic or exothermic.

The reaction between
ammonium nitrate and
water absorbs heat
from the surrounding
environment.
Three drops of concentrated
sulfuric acid added to 100
milliliters of water in a beaker
makes the beaker hot.
Ammonium chloride dissolved
in a beaker of water makes the
beaker cold.
Uranium atoms are split to
produce nuclear energy.
Water separates into
hydrogen and oxygen
when an electric current
is run through it.
Methane and oxygen are
combined to produce
methanol and heat.
Reset Next
Post Test: Chemical Reactions
© 2022 Edmentum. All rights reserved.

Answers

First and fifth reaction shows endothermic reaction while the rest of it shows exothermic reaction.

What reaction shows exothermic and endothermic reaction?

The reaction between ammonium nitrate and water is an example of endothermic reaction because it absorbs heat from the surrounding environment.

Three drops of concentrated sulfuric acid added to 100 milliliters of water in a beaker makes the beaker hot because exothermic reaction occur.

Ammonium chloride dissolved in a beaker of water makes the beaker cold which shows that it is exothermic reaction because heat leaves the solution.

Uranium atoms are split to produce nuclear energy is an example of exothermic reaction.

Water separates into hydrogen and oxygen when an electric current is run through it that shows endothermic reaction.

Methane and oxygen are combined to produce methanol and heat is an example of exothermic reaction.

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A solution is 0.225M Na2SO4. What is the molarity of the sodium ion in solution

Answers

The molarity of the sodium ion in the solution is 0.450 M.

How do we determine the molarity of sodium ions in a solution?

The molarity of the sodium ion in a solution can be determined by the dissociation of the given solution Na2SO4(sodium sulfate).

The dissociation of Na2SO4 is computed as follows:

1 mole of Na2SO4 dissociates to give 2 moles of sodium cations and 1 mole of sulfate anion.

i.e.

[tex]\mathbf{Na_2SO_4 \to 2Na^{+} + SO_4^{2-}}[/tex]

The molarity for sodium-ion [Na+] is:

= 2 × 0.225 M

= 0.450 M

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An arrow is fired at a target on a high wall. How does the energy change between the moment the arrow is fired and the moment it hits the target?

o The potential energy and kinetic energy remain the same.
o The potential energy decreases as kinetic energy increases.
o The kinetic energy decreases as potential energy increases.
o The kinetic energy remains at zero, but potential energy increases.

Answers

The kinetic energy decreases as potential energy increases. Hence, option C is correct.

What is potential energy?

Potential energy is stored energy that depends upon the relative position of various parts of a system.

As the target is fired high on the wall, the change in the energy that is observed as the arrow moves toward the target is kinetic energy starts to decrease as the arrow reaches nearer to the target and the potential energy is observed to increase.

So, in short, the energy transformation is from kinetic energy from a moving arrow to potential energy when the arrow hits the target.

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What is lawn sand made up of and clay don’t copy straight off Cuz I can’t write the same thing it has

Answers

Answer:

?? what i dont understand

You are trying to determine the
mass of sodium chloride required to
create a 0.875 m solution in 534 g of
water. How many moles of NaCl are
required?

Answers

Answer:

Answer:

Mass = 27.291 g

Explanation:

Given data:

Mass of sodium chloride = ?

Mass of water = 534 g

Molality = 0.875 m

Solution:

Molality:

It is the number of moles of solute into kilogram of solvent.

Formula:

Molality = number of moles of solute / kilogram solvent

Mathematical expression:

m = n/kg

Now we will convert the g into kg.

Mass of water = 534 g× 1kg/1000 g = 0.534 kg

Now we will put the values in formula.

0.875 m = n / 0.534 kg

n = 0.467 mol

Now we will calculate the mass of sodium chloride:

Mass = number of moles × molar mass

Mass = 0.467 mol × 58.44 g/mol

Mass = 27.291 g

0.467 mol NaCl are needed to
create a 0.875 m solution using 534
g of water. How many grams of
sodium chloride are required to
make the solution?

Answers

The mass, in grams, of sodium chloride needed would be 27.29 grams.

Number of moles

The number of moles of a substance is mathematically given as:

Mole = mass/molar mass.

Thus, mass = mole x molar mass.

In this case, 0.467 moles of NaCl is needed. The mass of 0.467 moles of NaCl can then be calculated as:

Mass = 0.467 x 58.44 = 27.29 grams.

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6.0 mol NaOH reacts with
9.0 mol H3PO4 according to
the equation below:
3NaOH + H3PO4 → 3H₂O + Na3PO4
How many moles of Na3PO4 form from
6.0 mol NaOH?
[?] mol Na3PO4
Round your answer to the tenths place.

Answers

2 moles of Na3PO4 form from 6.0 mol NaOH. Details about stoichiometry can be found below.

How to calculate number of moles?

The number of moles of a substance can be calculated stoichiometrically as follows:

3NaOH + H3PO4 → 3H₂O + Na3PO4

According to this equation,

3 moles of NaOH produces 1 mole of Na3PO4

This means that 6 moles of NaOH will produce 6/3 = 2 moles of Na3PO4

Therefore, 2 moles of Na3PO4 form from 6.0 mol NaOH.

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. Sodium hydroxide is added drop by drop to some hydrochloric acid in a beaker. Which of the following occurs in the beaker? .​

Answers

Answer:

Table salt+water

Explanation:

When hydrochloric acid and sodium hydroxide interact it results in the formation of salt and a release of heat. The result of these 2 highly aggressive compounds is table salt and water. (Compounds that are ultimately harmless, even beneficial to us human beings)

Hope i helped

What temperature, in Kelvin, does a 1.00 gram sample of Ne in a 2.50 L container need to be adjusted to in order to bring the pressure to 1.00 atm? Report your answer to the nearest Kelvin. (Moodle is looking for a number only, no units.)

Answers

The temperature of 0.049 moles of a Ne with a pressure of 1.00 atm and a volume of 2.50 L is 621.44K.

How to calculate temperature?

The temperature of a given gas can be calculated using the ideal gas law equation:

PV = nRT

Where;

P = pressure = 1.00 atm

V = volume =2.50 L

R = gas law constant = 0.0821 Latm/molK

Mass =1.00 gram

The molar mass of Ne= 20.1797 u

[tex]Moles = \frac{mass}{molar \;mass}[/tex]

[tex]Moles = \frac{1.00}{20.1797}[/tex]

Moles = 0.049mol

T = temperature=?

Putting the value in the equation:

PV = nRT

1.00 atm × 2.50 L = 0.049mol × 0.0821 × T

T = 621.44K

Therefore, the temperature of 0.049 moles of a Ne with a pressure of 1.00 atm and a volume of 2.50 L is 621.44K.

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The atomic mass unit is presently based on assigning an exact integral mass (in amu) to an isotope of an hydrogen oxygen sodium carbon helium
a. hydrogen

b. oxygen

c. sodium

d. carbon

e. helium

Answers

Answer: a. hydrogen

This is a fact.

Carbon is the reference taken to assign the atomic mass unit

One twelfth of the mass of unbound carbon-12 is taken as 1amuThe unit for the atomic mass constant is Dalton (Da)This unit is standard when doing calculations in chemistry and physics1amu = 1.6605x10⁻¹⁹gThis was also derived from the law of definite proportionsThis standard has been set by the International Union of Pure and Applied Chemistry (IUPAC)The IUPAC is responsible for assigning various standards such as the nomenclature of various compounds, and updating the periodic table of elements.According to the IUPAC carbon is the reference taken to assign the atomic mass unit

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How many moles of fluorine atoms are in a sample of fluorine that contains 7.45 x 10^24 fluorine atoms? (Report your answer to one place past the decimal point.

Answers

Based on the calculations, the number of moles of fluorine atoms present is equal to 12.4 moles.

How to calculate the moles of fluorine atoms?

In order to determine the number of moles of fluorine atoms, we would calculate the number of atoms in 1 mole of an fluorine atoms in accordance with Avogadro's constant.

1 mole of fluorine atom = 6.02 × 10²³ molecules

X moles of fluorine atom = 7.45 × 10²⁴ molecules

Cross-multiplying, we have:

X = 7.45 × 10²⁴/6.02 × 10²³

X = 12.4 moles.

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Which of the following reactions would result in decreased entropy?
Q A. CO,(s) → CO2(g)
OB. H₂O(g) → H₂O()
OC. 203(g) → 30₂(g)
D. N₂204(g) → 2NO₂(g)

Answers

The reaction that would result in decreased entropy is : ( A ) CO(s) → CO2(g)

What are Endothermic reactions

Reactions that absorb heat from its surroundings are known as endothermic reactions, Endothermic reactions result in a decreased entropy as the temperature of the surrounding becomes lower than the temperature of the container where the reaction occurs.

Examples of endothermic reactions are : melting and evaporation which results in the change of state from solid to liquid or from solid to gaseous state.

Hence we can conclude that The reaction that would result in decreased entropy is : ( A ) CO(s) → CO2(g)

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can a chemical reaction take place without enzyme​

Answers

Answer:

Theoretically, Yes (See the explanation)

Explanation:

The body has enzymes that catalyze processes, as several other respondents have mentioned. I haven't noticed any comments, but the reverse impact might be just as significant. Some enzymes are reaction inhibitors. Others operate as both catalysts and inhibitors, depending on the amounts of the reactants and reaction products close to the catalyst. I'll provide an illustration to demonstrate how crucial inhibition may be. Let's say you consume three banana splits one after the other. That is a large number of calories. You would have a very high temperature and be so energetic and full of energy that you would be bouncing off the walls if all those calories were converted simultaneously into energy and heat. But neither you nor I have ever heard of overeating creating a high temperature or anxiety. This is due to the fact that many of the high energy molecules produced by the process hinder the enzymes that regulate metabolism, which produces the energy needed to power your body and generate heat. In other words, if you don't require high energy, your body won't keep making it. When there are huge amounts of carbohydrates around, the enzymes that turn the carbohydrates you consumed into glycogen and fat (to store the extra energy you don't need right now) become catalytic (mostly glucose). Therefore, the /majority of the energy from those three banana splits will be stored as fat and glycogen as it won't be needed. And that occurs as a result of the reaction to turn the sugars into energy being blocked by the lack of a demand for the energy at the time. Both enzymes that act as catalysts and those that act as inhibitors are essential to the healthy operation of our bodies.

________________________________________________________

Definitions:

Enzymes: Any of various proteins, as pepsin, originating from living cells and capable of producing certain chemical changes in organic substances by catalytic action, as in digestion.

Metabolism: The sum of physical and chemical processes in an organism by which its material substance is produced, maintained, and destroyed, and by which energy is made available.

Glucose: A sugar, C6H12O6, having several optically different forms, the common dextrorotatory form (dextroglucose, or -glucose) occurring in many fruits , animal tissues and fluids, etc., and having a sweetness about one half that of ordinary sugar, and the rare levorotary form (lavoglucose, or -glucose) not naturally occurring.

Chemical reaction: Reaction, the reciprocal action of chemical agents upon each other; chemical change.

Protein: Any of numerous, highly varied organic molecules constituting a large portion of the mass of every life form and necessary in the diet of all animals and other nonphotosynthesizing organisms, composed of 20 or more amino acids linked in a genetically controlled linear sequence into one or more long polypeptide chains, the final shape and other properties of each protein being determined by the side chains of the amino acids and there chemical attachments: proteins include such specialized forms as collagen for supportive tissue, hemoglobin for transport, antibodies for immune defense, and enzymes for metabolism.

Amino acids: Any of a class of organic compounds that contains at least one amino group, -NH2, and one carboxyl, -COOH: the alpha-amino acids, RCH(NH2)COOH, are the building blocks from which proteins are constructed.

Answer:

Chemical reactions would slow down and even not proceed at all without enzymes.

Explanation:

Enzymes are protein catalysts, meaning they speed up chemical...

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