A balloon takes up 625 L at 0°C. If it is heated to 80°C, what will its new volume be?

During the formation of a coordination compound, ligands act as:

A) Lewis bases.

Ligands are molecules or ions that bind to a central metal ion or atom in a coordination complex. They typically have one or more lone pairs of electrons available for donation. In this context, ligands are considered Lewis bases because they donate electron pairs to the central metal ion or atom. The central metal ion or atom, in turn, acts as a Lewis acid by accepting electron pairs from the ligands to form coordination bonds.

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Answer:6.023*10²³ / 2*10²⁵

To find the mass of a one mole of a specific molecule, add the atomic masses of each of its component atoms.\

Answer:

C. B

Explanation:

42.6 g of chromium(iii) oxide reacts with 15.1 g of aluminum to produce chromium and aluminum oxide. if 29.1 g of chromium is produced, then the mass of aluminum oxide is produced 14.6 g,

Here's how,

Cr2O3 + 2Al  ⇄  Al2O3 + 2Cr.....(1) (take this equation 1)

∴ In the above chemical reaction, Aluminum oxide is produced,

Given, Mass of Chromium(iii) oxide = 42.6 g,

Mass of Aluminum = 15.1 g, and

Mass of Chromium = 29.1 g,

Hence, we have to find oxygen, before finding the mass of aluminum oxide.

∵ Mass of Cr2O3 = 42.6 g,

⇒ (29.1 × 2)+(O3) = 42.6

⇒ 58.2 + O3 = 42.6

⇒ O3 = 42.6 - 58.2 ⇒ - 15.6 g

Put O3 in equation (1), we get,

Now, put the atomic mass of O in equation 1, we get,

∴ Al2O3 ⇒ [(29.1 × 2) + {(-5.2) × 3}]

⇒ 14.6 g

Therefore, the Mass of Aluminum Oxide produced is 14.6 g.

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If the temperature drops, an endothemic response is occurring.

endothermic

As a result, dissolving table salt in water is endothermic. The only chemical reaction that can be either exothermic or endothermic is the dissolving of salts in water.

Exothermic or endothermic dissolving of a salt depends on which of the two energies, lattice or hydration, is larger. The quantity of energy released per unit of salt is often expressed in terms of kilocalories per mole (kcal/mol) or kilojoules per mole (kJ/mol).

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Answer:

nnhnhgnklhnhmkghklmfmg

Explanation:

cvgngh kcvl vl gkh kn hg

360 ml of the 70% acid and 540 ml of the 20% acid is required to make the 40% acid.

We know that this is a mixture problem thus we would have to apply the algebra of the problem so as to obtain the required solution. We are told that; The chemist combines x ml of a 20% acid solution, and y ml of a 70% acid solution to make the 40% acid solution.

We would then set up a pair of equations as follows;

x + y= 900...........eq 1

0.2x + 0.7y= 0.4(900)...eq 2

x = 900 - y ------ eq 3

Then;

0.2( 900 - y) + 0.7y = 360

180 - 0.2 y + 0.7y = 360

0.5 y = 180

y = 360 ml

Then we have;

x + 360 = 900

x = 540 ml

These are the required volumes.

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Answer: 17, Si

Explanation:

To balance the redox reaction in basic solution, follow these steps:

Assign oxidation numbers to each element in the reaction:

Cl in ClO₂: +4

Cl in CIO: +1

Ag in Ag⁺: +1

Ag in Ag: 0

Identify the elements undergoing oxidation and reduction:

Oxidation: Cl in ClO₂ is going from +4 to +1.

Reduction: Ag⁺ is going from +1 to 0.

Balance the number of atoms for each element except for H and O:

ClO₂ + Ag⁺ → CIO + Ag

Balance the oxygen atoms by adding water (H₂O) molecules:

ClO₂ + Ag⁺ → CIO + Ag + H₂O

Balance the hydrogen atoms by adding hydroxide ions (OH⁻):

ClO₂ + Ag⁺ + H₂O → CIO + Ag + OH⁻

Balance the charge by adding electrons (e⁻):

ClO₂ + 2Ag⁺ + 2H₂O → CIO + 2Ag + 2OH⁻ + 2e⁻

Make sure that the number of electrons lost in the oxidation half-reaction equals the number of electrons gained in the reduction half-reaction.

The balanced redox reaction in basic solution is:

ClO₂ + 2Ag⁺ + 2H₂O → CIO + 2Ag + 2OH⁻

Answer:

Ideal?

Explanation:

This question is lacking context, but it's most likely looking for ideal. There is an idea of "ideal" gasses, which are gasses the behave according the ideal gas law PV=nRT. The concept is the gasses can get very close to behaving ideally, but there is never a gas the will perfectly obey the ideal gas law. There are many factors that affect this, but I won't get into thoes since that's not what the question asked.

(a) To get the pH of the media to 5.8, you would add NaOH solution. NaOH is used as a basic solution, and when it is added to a solution, it will increase the pH of the solution.

(b) The molecular weight of BA is 225.3. To prepare a 1M solution, you would have to weigh out 225.3 grams of BA.(c) To convert a 1M solution of BA to mg/mL, you can use the following equation: 1 mole = molecular weight in grams; 1000 millimoles = 1 mole. So, 1 M = 1000 mg/mL. Therefore, a 1M solution of BA is equivalent to 1000 mg/mL .(d) To convert a concentration of 1000 mg/mL .

Therefore, to calculate the weight required for a 5 mM solution, use the following formula :Mass of BA = molarity × volume × molecular weight= 5 × 0.001 × 225.3= 1.1265 grams(f) To convert a concentration of 5 mM to mg/mL, we use the following formula: Concentration (mg/mL) = (Concentration (mM) × Molecular weight) / 1000= (5 × 225.3) / 1000= 1.1265 mg/mL(g)

To convert a concentration of 1.1265 mg/mL to mg/L, we multiply by 1000, so 1.1265 mg/mL = 1126.5 mg/L.(h) Given that the stock solution of BA is 5 mM and the working solution is 0.2 mg/mL.

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The properties of matter which can be used to classify it include the following:

This is referred to as any substance which has mass and occupies space thereby meaning that it has a volume.

Matter can be classified into three forms which are:

Matter has physical properties such as shape in which a solid has a definite shape while gas and liquid doesn't due to the distance of their molecules. On the other hand chemical properties such as reactivity also determines the classification as gas is known to be more reactive while solids are least reactive.

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Answer:

A

Explanation:

I would say a because we all know that kinetic energy is energy in motion and fuel is an example of chemical energy. So it must be from chemical to kinetic energy.

Explanation:

In general, to balance an equation, here are the things we need to do:

Count the atoms of each element in the reactants and the products.

Use coefficients; place them in front of the compounds as needed.

Answer:

When the body senses it's not getting enough oxygen during sleep, it forces an awakening. At this time, the breathing airways open and breathing resumes. Because of this mechanism, you stand no chance of suffocating in your sleep.

Explanation:

Answer:

The correct answer is V1/T1=V2/T2.

Explanation:

Just took the test

Answer:

Its A on edge :)

Explanation:

Answer:

0.972

Explanation:

The balanced chemical equation for the reaction is:

3 NaOH + H3PO4 → Na3PO4 + 3 H2O

From the equation, we can see that for every 1 mole of H3PO4 reacted, 3 moles of water are produced. Therefore, we need to first calculate how many moles of H3PO4 are present in 4.30 g of NaOH:

molar mass of NaOH = 23.0 g/mol + 16.0 g/mol + 1.0 g/mol = 40.0 g/mol

moles of NaOH = 4.30 g / 40.0 g/mol = 0.108 mol

According to the balanced equation, 3 moles of water are produced for every 1 mole of H3PO4. Therefore, we can calculate how many moles of water are formed as follows:

moles of H3PO4 = 3/1 * 0.108 mol = 0.324 mol

moles of water = 3/1 * 0.324 mol = 0.972 mol

Therefore, 0.972 moles of water are formed when reacting 4.30 g of sodium hydroxide with phosphoric acid.

Answer:

First 20 Elements

Atomic Number Element Symbol

17 Chlorine Cl

18 Argon Ar

19 Potassium K

20 Calcium Ca

Answer:

High pressure.

Explanation:

The weather should have clear skies, if it is a Large "L" it would be could be stormy.

Hope this helps! have a great day!

Answer: 360g potassium chlorate

40g KCIO3 - 400g H2O = 360g KCIO3

When a liquid such as acetic acid is stirred it causes the molecules to become far apart, due to which the forces of attraction between molecules is weakened and freezing point is lowered.

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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Answer:

Number 3

Explanation:

The estimated age of the rock is approximately 1.58 x 10^10 years.

To estimate the age of the rock based on the mass ratio of 208Pb to 232Th, we can use the concept of radioactive decay and the half-life of 232Th.

The ratio of 208Pb to 232Th in the rock represents the amount of 208Pb that has been formed through the radioactive decay of 232Th over time. Since one 208Pb atom is the final decay product of one 232Th atom, the mass ratio can be used to determine the fraction of 232Th that has decayed.

Given that the mass ratio of 208Pb to 232Th is 0.28/1.00, we can calculate the fraction of 232Th that has decayed as follows:

Fraction of 232Th decayed = (1 - mass ratio of 208Pb/232Th) = (1 - 0.28/1.00) = 0.72

The fraction of 232Th that has decayed corresponds to the fraction of the original amount of 232Th present in the rock. Using the concept of half-life, we can relate this fraction to the age of the rock.

Since the half-life of 232Th is 1.39 x 10^10 years, we can calculate the number of half-lives that have passed using the fraction of 232Th decayed:

Number of half-lives = log(base 0.5) (fraction of 232Th decayed)

Number of half-lives = log(base 0.5) (0.72) ≈ 1.14

The number of half-lives represents the time elapsed, and each half-life is equal to 1.39 x 10^10 years.

Therefore, the age of the rock can be estimated as:

Age of the rock = Number of half-lives x Half-life of 232Th

= 1.14 x 1.39 x 10^10 years

≈ 1.58 x 10^10 years

The estimated age of the rock is approximately 1.58 x 10^10 years.

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Answer:

Rate cup 1: 36.00 tsp/h.

Rate cup 2: 59.50 tsp/h.

Rate cup 3: 70.13 tsp/h.

Explanation:

Based on the given example, the units must be in tsp/hour. To do this we just have to divide tsp by seconds and then convert it to hours remembering that 1 hour equals 3600 seconds.

Let's calculate each case:

- Cup 1: 1 tsp, 1 minute 40 seconds. Remember that 1 minute equals 60 seconds, so 1 minute and 40 seconds equals 100 seconds. The calculation of the rate will look like this:

The rate of cup 1 is 36.00 tsp/h.

- Cup 2: 2 tsp, 2 minutes 1 second. As we saw before 1 minute equals 60 seconds, so 2 minutes equals 120 seconds. 2 minutes and 1 second equals 121 seconds. The rate of cup 2 will be calculated as:

The rate of cup 2 is 59.50 tsp/h.

- Cup 3: 3 tsp, 2 minutes 34 seconds. 2 minutes are the same that 120 seconds, so 2 minutes 34 seconds equals 154 seconds. The rate of cup 3 is calculated as follows:

The rate of cup 3 is 70.13 tsp/h.

Answer:

I don't know the exact answer you are looking for

Dilution reduces the total moles of solute in solution. When a solution is diluted, more solvent is added to decrease the concentration of the solute. As a result, the total amount of solute in the solution decreases.

This is because the amount of solute remains constant while the volume of the solution increases. However, the number of moles of solute remains the same, as it is a fundamental property of the solute that does not change with dilution.

For example, if you have a solution containing 1 mole of solute dissolved in 1 liter of solvent, and you dilute it by adding 1 more liter of solvent, the resulting solution will contain 1 mole of solute dissolved in 2 liters of solvent.

The total amount of solute remains the same, but the concentration of the solute in the solution is decreased due to the increased volume of the solution.

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Answer

electrons are very small, so every atom would have to contain a whole lot of electrons.Atoms must also contain some type of positively charged material which balances the negative charge on the electrons.

Explanation:

J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus.

hope this helped

A metal electrode composed of  strong reducing agent will have a greater

electrical potential to push electrons toward the electrode composed of a

weak reducing agent.

Strong reducing agents are compounds which donates or loses electrons

with a corresponding increase in the oxidation state. Weak reducing agents

can also be referred to as oxidizing agents and they accept the electrons

from the strong reducing agents which results in a reduction in the oxidation

state.

The strong reducing agent has a greater electric potential which aids the

electrons being pushed towards the electrodes with a weak reducing agent.

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