The key point when trying to speed
up the dissolving process is to
increase the

A)contact between the solvent and
solute
B)amount of solvent used in the
solution

The  work (in joule)  performed on the surrounding  when 1 mole of an ideal gas expanded from a volume of 1. 00 liter to a volume of 8. 93 liter against a constant external pressure of 1. 00 atm is 803 joules

we know that,

n = 1 mole

Vi = 1 L

Vf = 8.93 L

P = 1 atm

the work performed on the surrounding under constant pressure is given as can be calculated as below:

W = P∆V

W = P(Vf—Vi)

W = 1 atm × (8.93—1) L

W = 1 atm × 7.93 L

W = 8.93 Litre•atm

Given that,

1 Litre•atm = 101.3J

So,

W = 7.93 Litre•atm × 101.3J/Litre•atm

W = 803.309 J

W ≈ 803 J

Then the work done on the surrounding is approximately

803 joules

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Answer:

1. Force

2. contact force

3. non-contact force

4. magnetism

5. strength and direction

6. length, direction

7. newtons

Explanation:

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Answer:

steel making

Explanation:

The magnitude of the elevator's acceleration is 1.63 m/s².

The weight of an object is the force with which it is attracted to the center of the Earth due to gravity. On solid ground, your weight is equal to your mass times the acceleration due to gravity (g), which is approximately 9.81 m/s². Therefore, your mass would be;

mass = weight / g = 151 lb / (9.81 m/s² × 2.2046 lb/kg)

≈ 68.49 kg

In the elevator, your apparent weight is different because the elevator is accelerating. The force acting on you in the elevator is the sum of your weight and the force due to the acceleration of the elevator, which is given by;

force = mass × (g + acceleration)

When the elevator is moving upward with an acceleration a, your apparent weight is;

131 lb = mass × (g + a)

Substituting the value of mass, we get;

131 lb = 68.49 kg × (9.81 m/s² + a)

Solving for a, we get;

a = (131 lb / 68.49 kg - 9.81 m/s²)

≈ 1.63 m/s²

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--The given question is incomplete, the complete question is

"When you weigh yourself on good old terra firma (solid ground), your weight is 151 lb. In an elevator your apparent weight is 131 lb . What is the magnitude of the elevator's acceleration?"--

i)   Either Q or R could potentially form an ionic bond with S because the element S has the highest electronegativity (6), while the other two elements have lower electronegativity values.

ii)

S and Q are more likely to form a polar covalent bond because the electronegativity difference between S and Q (6 - 3.64 = 2.36) is greater than the electronegativity difference between S and R (6 - 3 = 3).

iii)

The electronegativity difference between Q and R (3.64 - 3 = 0.64) is relatively small, indicating that they are more likely to form a non-polar covalent bond.

In a polar covalent bond, the electrons are shared unequally between the two atoms, thus creating a partial positive charge on one atom and a partial negative charge on the other.

The greater the difference in electronegativity between the two atoms, the more polar the bond will be.

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Explanation:

particles

Answer: particle

Explanation:

The light make small particle of wave

Answer:

14.594% Iron and 85.406% Sulfur

Explanation:

103g (S) + 17.6g (Fe) = 120.6g total mass

103/120.6 × 100 = 85.406% Sulfur

17.6/120.6 × 100 = 14.594% Iron

The surface area of the statute covered with the gold is 9,627.32 m².

Volume is a scalar quantity expressing the amount of three-dimensional space enclosed by a closed surface.

The volume of the statute covered with gold is calculated as follows;

Volume = mass/density

Volume = (279 kg) / (19,320 kg/m³)

Volume = 0.0144 m³

The surface area of a solid object is a measure of the total area that the surface of the object occupies.

V = S.A x h

where;

S.A = V/h

S.A = (0.0144) / (0.0015 x 10⁻³)

S.A = 9,627.32 m²

Thus, the surface area of the statute covered with the gold is 9,627.32 m².

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Answer: In this order

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

Explanation:

Answer:

Mars.....................

The amount, in grams, of radon that will be collected in the office sample of air, would be 148.8 grams.

The air sample contains 3.20 x 10⁻⁴ mg of radon per mL of gas. A total air volume of 4.65 x 10⁴ L passed through the office. The amount of radon in the air that passed through the office can be estimated as follow:

Amount of radon per mL of gas = 3.20 x 10⁻⁴ mg

Total volume of air in sample = 4.65 x 10⁴ L

The total air volume needs to be converted to mL:

4.65 x 10⁴ L x 1000 = 4.65 x \(10^7\) mL

1 mL = 3.20 x 10⁻⁴ mg

4.65 x \(10^7\) mL = 4.65 x \(10^7\) x 3.20 x 10⁻⁴

                       = 14.88 x \(10^4\) mg

In other words, the total amount of radon gas in the sample of air is 14.88 x \(10^4\) mg.

1 g = 0.001 mg

14.88 x \(10^4\) mg = 14.88 x \(10^4\)/1000

                        = 148.8 grams

In summary, the total amount of radon gas that will be collected in the office sample would be 148.8 grams.

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Answer: a, 1 b,1 c,0

Explanation:

Answer:

A= 1

B= 1

C= 0

Explanation:

Answer:

It is unsaturated

Explanation:

A solution is said to be unsaturated when it contains less solute than it can normally hold at a given temperature.

The solubility of NaCl remains fairly independent of temperature hence the line for the solubility of NaCl remains fairly flat in the solubility curve.

The solubility of NaCl is about 36 g of NaCl in 100g of water. Hence a solution that contains 35.00 g of sodium chloride in 100 g of water at 45.0C is unsaturated.

Answer:

13.4 mol Ar

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

534 g Ar

Step 2: Identify Conversions

Molar Mass of Ar - 39.95 g/mol

Step 3: Convert

\(534 \ g \ Ar(\frac{1 \ mol \ Ar}{39.95 \ g \ Ar} )\) = 13.3667 mol Ar

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

13.3667 mol Ar ≈ 13.4 mol Ar

Answer:

The number of moles in 452 grams of Argon is 13.31 moles.

Explanation:

The piece of glassware calibrated "TD" will contain and transfer the stated volume the stated volume slightly more than

Volumetric flasks, burets and pipets are the maximum correct with tolerances of much less than 0.2%. To obtain those accuracies the character the use of the tool desires to apply the right approach and the measurements want to made on the temperature for which the glassware changed into calibrated (commonly 20 stages C).To suggest this difference, volumetric glassware is commonly marked TD which means to supply or TC which means to comprise.

Certain styles of pipets, in particular micropipets, are designed to comprise a positive extent of liquid and those are marked piece of glassware calibrated "TD" will comprise and switch the said extent the said extent said precisely; precisely barely greater than; precisely barely much less than; precisely precisely: barely much less than barely much less than; barely greater than.

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The axodendritic synapses are rare and always terminate on dendrites.
Axodendritic synapses are a type of synapse in which the axon of one neuron forms a synapse with the dendrite of another neuron. This type of synapse is important for neuronal communication and signal transmission in the nervous system.

Out of the given options, option a) states that axodendritic synapses are rare, which is true. This means that they are not commonly found in the nervous system.

Option c) states that axodendritic synapses always terminate on dendrites, which is also true. Dendrites are the receiving end of a neuron, and the axon terminals form synapses with dendritic spines to transmit signals to the next neuron.

Therefore, the correct answer is a and c, which means that axodendritic synapses are rare and always terminate on dendrites.

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Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

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The same amount of time, the cobalt-60 sample will have a higher activity than the strontium-90 sample because more of its atoms will have decayed. However, over time, the activity of both samples will decrease as more and more atoms decay.

The activities (number of decays per second) of the samples will not be the same. This is because the half-life of strontium-90 is longer than that of cobalt-60, which means that it takes longer for half of the atoms in the strontium-90 sample to decay. Therefore, after the same amount of time, the cobalt-60 sample will have a higher activity than the strontium-90 sample because more of its atoms will have decayed. However, over time, the activity of both samples will decrease as more and more atoms decay.

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The disadvantage of increasing our use of solar energy is that unfortunately currently, the production and storage of solar energy is bit as cost efficient when compared to obtaining the same quantity of energy from fossil fuels.



Answer:

3x10^21molecules

Explanation:

convert 0.89g to a mole by finding the molar mass of C7H8N4O2. Divide 0.89 by 180g(molar mass) then multiply it by 6.02x10^23 and it equals 2.9766x10^21 on the calculator and you round to the nearest sig fig.

Answer:

Explanation:

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Answer:

negative charge

Explanation:

An anion has more electrons than protons, consequently giving it a net negative charge.

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The mass of water that contains same number of hydrogen atoms as 34 g of ammonia is 54 g.

First calculate the number of moles in a hydrogen gas. The molar mass of ammonia(NH₃) is 17 g/mol. Hence, the number of moles for ammonia(NH₃) is

moles=34 g×(1 mol/17 g)

=2 mol

The relation between moles and number of atoms is given as

1 mol=6.022×10²³ atoms

Since 1 mol NH₃ contains 3 mol of hydrogen. Hence, the number of hydrogen atoms in 2 mol NH₃ is

2 mol NH₃×(3 mol H/1 mol N)×(6.022×10²³ atoms/1 mol H)

=(2×3×6.022×10²³ atoms)

=3.6132×10²⁴ atoms

The molecular formula of water is H₂O. First, we need to find out the number of moles in the calculated atoms of hydrogen. One mol of water contains 2 moles of H. Hence, the number of moles of water is

3.6132×10²⁴ atoms×(1 mol H/6.022×10²³ atoms)×(1 mol H₂O/2 mol H)

=(3.6132×10²⁴ mol of H₂O/6.022×10²³×2)

=(3.6132×10²⁴ mol of H₂O/1.2044×10²⁴)

=3 mol of H₂O

The molar mass of of H₂O(water) is 18 g/mol. Hence, the mass of water is

3 mol H₂O×(18 g H₂O/1 mol H₂O)

=54 g H₂O.

Therefore, the mass of water which contains the same number of hydrogen atoms as 34 g of ammonia is 54 g of H₂O.

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Answer:

See explanation

Explanation:

When a beaker of ethanoic acid is placed in the refrigerator, its temperature drops and the vessel feels cool.

Now, when we mix ethanoic acid and sodium carbonate, an endothermic reaction occurs, fizzing is observed as carbon dioxide is given off and heat is lost to the surroundings causing the reaction vessel to feel cool to touch.

The difference between putting ethanoic acid in the refrigerator and adding  sodium carbonate to the solution is that, in the former, no new substance is formed. The substance remains ethanoic acid when retrieved from the refrigerator. In the later case, new substances are formed. The substance is no more ethanoic acid because a chemical reaction has taken place.

The molecular formula of polyvinyl chloride is (C₂H₃Cl)ₙ, where n is the number of repeating units in the polymer chain.

The given composition of vinyl chloride can be used to determine the empirical formula of the compound. To do this, we assume that we have 100g of the compound, which means we have 38.43g of carbon, 4.838g of hydrogen, and 56.72g of chlorine.

We then convert these masses to moles using the molar masses of each element:

- Moles of carbon = 38.43 g / 12.01 g/mol = 3.201 mol

- Moles of hydrogen = 4.838 g / 1.008 g/mol = 4.802 mol

- Moles of chlorine = 56.72 g / 35.45 g/mol = 1.599 mol

Next, we divide each of these mole values by the smallest mole value to get the mole ratio of the elements in the compound:

- Carbon: 3.201 mol / 1.599 mol = 2

- Hydrogen: 4.802 mol / 1.599 mol = 3

- Chlorine: 1.599 mol / 1.599 mol = 1

This gives us the empirical formula of vinyl chloride, which is C₂H₃Cl.

Polyvinyl chloride is formed by polymerizing vinyl chloride molecules to form a long chain of repeating units. The molecular mass of polyvinyl chloride is given as 23875 g/mol. To find the number of repeating units in the polymer chain, we divide the molecular mass by the molar mass of the empirical formula:

- Molar mass of C₂H₃Cl = 2(12.01 g/mol) + 3(1.008 g/mol) + 35.45 g/mol = 62.5 g/mol

- Number of repeating units = 23875 g/mol / 62.5 g/mol ≈ 382

Therefore, the molecular formula of polyvinyl chloride is (C₂H₃Cl)₃₈₂, which represents a long chain of 382 repeating units of vinyl chloride.

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Answer:

alpha: atomic mass = 4

beta: mass of electron; positive charge

gamma: 100 percent energy; zero mass

positron: mass <1; unstable charge (+)

beta: electron emitted from the nucleus

Note: Mesons are particles composed of a quark and an antiquark and do not fit the descriptions provided.