Need help !!!!! ASAP

Answer:

An acid would be soemthing that starts with H (hydrogen)

That is just the way it is written chemically.

Hope this helped!

Explanation:

Answer:

General formula of the hydrate XY.5H₂O

Explanation:

The general formula of a hydrate is given by; XY.nH₂O

Where n is the number of water of crystallization;

n = Moles of H₂O/Moles of XY

  = 0.050 Mol/0.00998 mol

  = 5.01

  ≈ 5

Therefore, the generalized formula of the hydrate is XY.5H₂O

The generalized formula of the hydrate can be written as [tex]\[ \text{ionic compound} \cdot 5 \text{H}_2\text{O} \][/tex]

To write the generalized formula of the hydrate, we need to represent the ratio of moles of water molecules to moles of the ionic compound in the hydrate.

Given:

[tex]Moles \ of \ water\ (H_2O) = 0.050 \ mol[/tex]

[tex]Moles\ of\ ionic\ compound = 0.00998\ mol[/tex]

The ratio of moles of water to moles of the ionic compound can be expressed as:

[tex]\[ \frac{\text{moles of water}}{\text{moles of ionic compound}} = \frac{0.050 \, \text{mol}}{0.00998 \, \text{mol}} \][/tex]

To simplify this ratio and express it as a whole number, we can multiply both the numerator and denominator by a factor that will result in whole numbers. In this case, we can multiply by [tex]1000[/tex]

[tex]\[ \frac{0.050 \, \text{mol} \times 1000}{0.00998 \, \text{mol} \times 1000} = \frac{50}{9.98} \][/tex]

This simplifies to approximately

[tex]\[ \frac{50}{9.98} = 5.01 \][/tex]

So, the ratio of moles of water to moles of the ionic compound in the hydrate is approximately [tex]\(5.01:1\)[/tex]

Where "ionic compound" represents the formula of the ionic compound present in the hydrate.

Using Charles's Law, the volume of argon gas at standard temperature (0°C) after initial conditions of 22.8 mL at 48°C is calculated to be approximately 19.5 mL.

The student is asking for help with the concept of how gas volume changes with temperature at constant pressure, a principle known as Charles's Law. Since the question involves argon gas, a noble gas, and relates to changes in temperature and volume, this is a Chemistry subject, typically studied in high school.

According to Charles's Law, the volume of a gas is directly proportional to its temperature when pressure is held constant. The formula relating initial and final volumes and temperatures is V1/T1 = V2/T2, where V1 and T1 are the initial volume and temperature, and V2 and T2 are the final volume and temperature. Here, T must be in Kelvin.

The standard temperature (STP) is defined as 0 degrees Celsius or 273.15 K. To find the volume at STP (V2) for the argon gas, we first convert the initial temperature from degrees Celsius to Kelvin:

Now, we apply Charles's Law:

V1/T1 = V2/T2 -> (22.8 mL / 321.15 K) = V2 / 273.15 K

Multiplying both sides by 273.15 K to solve for V2 gives:

V2 = (22.8 mL * 273.15 K) / 321.15 K

V2 ≈ 19.5 mL

So, at standard temperature, this sample of argon would occupy approximately 19.5 mL.

A) If volume increases, temperature increases

The law is V/T, meaning the two values are directly proportional, as one increases, the other increases too.

The statement which best describes Charles law is: A) If volume increases, temperature increases.

Charles law states that when the pressure of an ideal gas is kept constant, the volume of a gas is directly proportional to the absolute temperature of the gas.

Mathematically, Charles law is given by this formula;

[tex]V\;\alpha \;T\\\\V=kT[/tex]

This ultimately implies that, as the volume of an ideal gas increases, its temperature also increases in accordance with Charles law.

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Answer:

The bottom is troposhere the next is sratoshere,mesosphere,thermosphere then exoshere

Explanation:

The study of the atmosphere is called metrology. There are different types of components present in the atmosphere and these are gases and impure particles.

According to the question, the layers name is as follows:-

Hence, the answer is mentioned above.

For more information about the layers, refer to the link:-

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Answer:

Explanation:molar mass of N2=28

Volume occpied at stp=22.4 so 28/22.4=1.25 so mass nitrogen will be 56 multiply 1.25 =70g

Answer:

Newton 3rd Law of Motion or the Law of Force Pairs

(An applied force)

Force is a phenomenon that creates a push or pull that has both magnitude and direction. No push or pull exists in isolation, and multiple forces interacting can have cumulative effects. The force can vary in magnitude and can manifest both as a contact force and a field force.

A force is a push or pull that acts upon an object as a result of its interaction with another object. It has both magnitude and direction, therefore it's a vector quantity. Objects and systems are moved by forces. This area comes under the study of dynamics.

Examples of a force can include a person pushing a table (a contact force), or the gravitational pull of the Earth on a falling object (a field force). Forces have been categorized into many types such as push, pull, thrust, lift, weight, friction, and tension.

Keep in mind that no push or pull occurs in isolation (Newton's third law). For instance, when you are pushing a wall, the wall exerts an equal and opposite force on you.

When multiple forces act on an object, they add up like vectors. If two forces push in different directions on an object, the total force will be in the direction of the resultant force.

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Answer:

Cellular Respiration

Explanation:

Cellular respiration is the process that occurs in both plant and animal cells, allowing them to convert glucose into ATP, the usable form of energy for cellular functions. While photosynthesis only happens in plants, cellular respiration is essential for both plants and animals, illustrating a fundamental connection between these two types of organisms.

The process that takes place in both plant and animal cells is cellular respiration. This is a series of metabolic pathways that extracts energy from the bonds in glucose, a sugar that's produced during photosynthesis in plants, and converts it into ATP (adenosine triphosphate), which is a form of energy that all living things can use.

Although plants are capable of photosynthesis, the process by which they convert solar energy into chemical energy (glucose), they also perform cellular respiration to break down this glucose into usable energy for cellular activities. Animals, which cannot perform photosynthesis, rely entirely on cellular respiration to convert energy from consumed food into ATP.

It's important to note that photosynthesis only occurs in photosynthetic organisms such as plants, algae, and certain bacteria, while cellular respiration occurs in virtually all living organisms. This highlights the interconnectedness of life processes, as the oxygen created as a byproduct of photosynthesis is used by animals during cellular respiration, and the carbon dioxide produced by animals during cellular respiration is utilized by plants during photosynthesis.

Answer:

1. the outer layer of the eye: G scelra

2. when a light ray bends, or changes direction, when it moves from one material into another: F refraction

3. an optical instrument that makes objects that are far away look closer: K telescope

4. the point where all of the beams of light leaving a lens converge: focal point

5. a term for a medium that transmits nearly all the light rays that hit it: C transparent

6. the distance between any two peaks or any two troughs of a wave: J wavelength

7. a term used to describe a person who cannot see close objects clearly: B

farsighted

8. a term used to describe a person who cannot see faraway objects clearly: M nearsighted

9. a narrow beam of light that travels in a straight line: H light ray

10. a curved, transparent object used to refract light: lens

11. a word used to describe a medium that only allows some of the light rays that hit it to pass through it: E translucent

12. the process of converting light energy into...(can't see the rest)

13. (isn't visible either)

False100% sure of it

Answer is A Access pictures of the area taken by satelites.

Explanation: Satelites are the only thing out of these four answers that does not requir power supply from the town. Hope it helped!

The newspaper can get the pictures of the place by accessing pictures of the area taken by satellites.

Satellites use magnetic sensors to collect electromagnetic radiation of specific wavelength reflected from the Earth surface.

These sensors are able to detect wavelengths that are not possible by human eyes.

The power supply that has been cut off does not affect the satellite, hence it will detect the waves reflected from the Earth surface during the hurricane and the photo of the place can used by the newspaper for its morning edition.

Thus, the best way for the newspaper to get the pictures of the place is to access pictures of the area taken by satellites.

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Answer: 0.548J/g°C

Explanation:

Q = s × m × DeltaT

Q = Heat (J)

S = Specific Heat Capacity

M = mass (g)

DeltaT = Change in temperature (°C)

0.158Kg x 1000 = 158g

2.510J = s x 158g x (61°C-32°C)

2.510J/(158g x 29°C) = s

S = 0.54779.... J/g°C

S = 0.548 J/g°C

Answer: A, B, D

Explanation:

all of these examples show matter moving from a high volume of matter, to low volume of matter. When the molecules of the paint, toast, and chemicals were released, they will try to disperse away from the high concentration

Examples of diffusion include the spread of marker odor in a classroom, the smell of burnt toast in a kitchen, and the detection of toxic fumes in a town miles from a chemical factory. Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration.

Examples of diffusion in the list provided include:

Option C) is not an example of diffusion; it is an example of the gas contracting due to lower kinetic energy when cooled. Option E) concerns the expansion of a container with gas when heated due to increased pressure, not diffusion.

Charles’ Law........

Answer: Charles' Law

Explanation:

Charles' Law: This law states that volume is directly proportional to the temperature of the gas at constant pressure and number of moles.

[tex]V\propto T[/tex]     (At constant pressure and number of moles)

[tex]{V_1\times T_1}={V_2\times T_2}[/tex]

where,

[tex]V_1[/tex] = initial volume of gas

[tex]V_2[/tex] = final volume of gas

[tex]T_1[/tex] = initial temperature of gas

[tex]T_2[/tex] = final temperature of gas

Therefore, the volume and absolute temperature of a fixed quantity of gas are directly proportional under constant pressure conditions.

1,474 degrees fahrenheit (801 degrees celsius)

Salt, also known as sodium chloride, melts roughly around 801 degrees Celsius or 1473.8 Fahrenheit.

I think this is mainly for table salt.

a) Answer:

= 225 mL

Explanation:

Using Boyle's law of gases;

The volume of a fixed mass of a gas is inversely proportional to its pressure at constant temperature.

Therefore;

P1V1 = P2V2

in this case; let the initial pressure be P;

Therefore; V1 = 450 mL, P1 = P, V2 = ? and P2 = 2P

Thus;

V2 = P1V1/P2

     = (P×450)/ (2P)

     = 225 mL

Therefore, the new volume will be 225 mL

b) Answer;

=1800 mL

Explanation;

Let the initial pressure be P;

Therefore; V1 = 450 mL, P1 = P, V2 = ? and P2 = 1/4P

Thus;

V2 = P1V1/P2

     = (P×450)/(0.25P)

      = 1800 mL

Thus, when the pressure is reduced to one-fourth of its original, the new volume will be 1800 mL.

Given that the initial volume of the gas is 450 mL, the new volume of the gas obtained based on the given data are:

A. The new volume of the gas when the pressure is doubled is 225 mL

B. The new volume of the gas when the pressure is reduced to one-fourth of its original value is 1800 mL

P₁V₁ / T₁ = P₂V₂ / T₂

Since the temperature is constant, we have:

P₁V₁ = P₂V₂

P × 450 = 2P × V₂

Divide both side by 2P

V₂ = (P × 450) / 2P

V₂ = 450 / 2

V₂ = 225 mL

P₁V₁ / T₁ = P₂V₂ / T₂

Since the temperature is constant, we have:

P₁V₁ = P₂V₂

P × 450 = ¼P × V₂

450P = PV₂ / 4

Cross multiply

450P × 4 = PV₂

Divide both side by P

V₂ = (450P × 4) / P

V₂ = 450 × 4

V₂ = 1800 mL

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Answer:

= 3,702.816 Joules

Explanation:

Heat absorbed by water is equivalent to heat released by copper.

Heat absorbed is given by:

Q = mcΔT

where m is the mass, c is the specific capacity and ΔT is the change in temperature.

Mass = 1248 g

ΔT = 45°C - 22°C = 23°C

c = 0.129j/g°c

Heat = 1248 g × 23°C × 0.129j/g°C

        = 3,702.816 Joules

The heat required can be calculated using the formula Q = mcΔT, where Q is the heat energy, m is the mass, c is the specific heat capacity, and ΔT is the temperature change.

The amount of heat required to raise the temperature of a substance can be calculated using the formula:

Q = mcΔT

Where Q is the heat energy, m is the mass of the substance, c is the specific heat capacity, and ΔT is the temperature change. In this case, the mass of the gold is 1.248 kg, the specific heat capacity is 0.129 J/g°C, and the temperature change is from 22.0°C to 45.0°C. Converting the mass to grams (1.248 kg = 1248 g), we can calculate the heat energy:

Q = (1248 g)(0.129 J/g°C)(45.0°C - 22.0°C) = 19230.72 J

Therefore, the total amount of heat required to raise the temperature of 1.248 kg of gold from 22.0°C to 45.0°C is 19230.72 Joules.

Answer:

7.5 mol of hydrogen would be needed to consume the available nitrogen.

Explanation:

3H₂ + N₂ → 2NH₃

it is clear that 3mol of hydrogen react with 1 mol of Nitrogen to give 2 mol of ammonia.

for H₂:

number of moles = mass / molar mass = (7.00 g) /  (2.00 g/mol) = 3.5 mol.

for N₂:

number of moles = mass / molar mass = (70.00 g) /  (28.00 g/mol) = 2.5 mol.

using cross multiplication

1 mol of  N₂ needs → 3 mol of H₂

2.5 mol of  N₂ needs → ??? mol of H₂

∴ the number of mol of H₂ needed = (3*2.5) / 1 = 7.5 mol

So, the right choice is:

7.5 mol of hydrogen would be needed to consume the available nitrogen.

Answer:

Its A

Explanation:

Answer: 4 mol

C + 2S = CS2

1 mol of CS2 contains 2 mol of sulfur

So 2 mol of cs2 contains 2*2 mol of S

2mol CS2 x 2 mol S/ 1 mol CS2 =

4 mol S

Final answer:

In 2.00 moles of carbon disulfide (CS2), there are 4.00 moles of sulfur atoms because each molecule of CS2 contains two sulfur atoms.

Explanation:

The question asks how many moles of sulfur atoms are present in 2.00 moles of carbon disulfide (CS2). Carbon disulfide is a chemical compound made up of one carbon atom and two sulfur atoms per molecule (CS2).

To determine the moles of sulfur atoms, we use the mole ratio from the molecular formula, which is 1 mole of CS2 contains 2 moles of sulfur (S). Accordingly, for 2.00 moles of CS2, we would have:

2.00 moles CS2 × (2 moles S / 1 mole CS2) = 4.00 moles of sulfur atoms.

All living beings are made up of cells. or Cell is the most basic unit of life. or All cells must come from pre-existing cells.

I hoped I helped a little

Answer:

Absolute zero is the lowest possible temperature of a gas.

Explanation:

Absolute zero is the lowest possible temperature, at which all molecular motion theoretically stops. Its actual implications, especially concerning the volume of a gas, don't fully comply with classical interpretations and delve into the realm of quantum physics.

Absolute zero is the lowest possible temperature at which all molecular motion ceases. It is defined as 0 on the Kelvin scale and equivalent to -273.15 degrees Celsius. This temperature is theoretically the point at which a gas would have no kinetic energy.

It's important to understand that while at temperatures near absolute zero, the behavior of real gases deviates from that predicted by ideal gas laws like Charles's Law or Amonton's Law. These deviations occur because the volume of the gas molecules themselves becomes appreciable relative to the total volume occupied by the gas and the collisions between the molecules can no longer be ignored.

However, these assumptions become less valid as temperatures approach absolute zero. The volume of a gas at absolute zero is a matter of quantum physics, and doesn't strictly comply with classical interpretations of gas behavior.

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Answer: About 160 grams

Explanation: The formula for this reaction is 4Fe + 3O2 = 2Fe2O3. Since only 2 moles of iron are reacting then only 1 mole of the product will be produced. The molar mass of the product is about 160 grams.

The answer is:

The approximate volume is 9.84 L.

[tex]V=9.84L[/tex]

Since we are given the numer of moles, the temperature and the pressure of the gas, we can calculate the approximate volume using The Ideal Gas Law.

The Ideal Gas Law is based on Boyle's Law, Gay-Lussac's Law, Charles's Law, and Avogadro's Law, and it's described by the following equation:

[tex]PV=nRT[/tex]

Where,

P is the pressure of the gas.

V is the volume of the gas.

n is the number of moles of the gas.

T is the absolute temperature of the gas (Kelvin).

R is the ideal gas constant, which is equal to:

[tex]R=0.082\frac{atm.L}{mol.K}[/tex]

So, we are given the information:

[tex]n=1.5mol\\Temperature=300K\\Pressure=3.75atm[/tex]

Now, substituting the given information and isolating the Volume from The Ideal Gas Law equation, we have:

[tex]PV=nRT[/tex]

[tex]V=\frac{nRT}{P}[/tex]

[tex]3.75atm*V=1.5mol*0.082*\frac{atm.L}{mol.K}*300K[/tex]

[tex]V=\frac{ 1.5mol*0.082*\frac{atm.L}{mol.K}*300K}{3.75atm}\\\\V=\frac{36.9atm.L}{3.75atm}=9.84L[/tex]

So, the approximate volume is 9.84 L.

[tex]V=9.84L[/tex]

Have a nice day!

A chemical reaction between solar ultraviolet radiation and an atmosphere polluted with hydrocarbons and oxides of nitrogen causes photochemical smog. ... Smog can happen both during the day and at night, but photochemical smog only happens in the presence of sunlight.

Answer:

Solution X might be a solution of carbonate ions [tex]\text{CO}_3^{2-}\;(aq)[/tex].

The question doesn't tell much about the positive ion in solution X. The ion itself shall not react with carbonate ions [tex]\text{CO}_3^{2-}\;(aq)[/tex] to form a precipitate. For that, cations from group 1 metals will work. For example, X can be a solution of sodium carbonate, which contain a large number of sodium ions [tex]\text{Na}^{+}\;(aq)[/tex].

Explanation:

Start with the first observation:

"Solution X mixed with magnesium chloride solution to form a white precipitate."

A solution of magnesium chloride [tex]\text{MgCl}_2\;(aq)[/tex] contains both

Both may react to form a white precipitate.

[tex]\text{Mg}^{2+}\;(aq)[/tex] ions:

[tex]\text{Cl}^{-}\;(aq)[/tex] ions:

Second observation:

"The white precipitate obtained and reacted with [dilute] HCl to give [colorless] gas bubbles."

The carbon dioxide gas from the reaction between [tex]\text{MgCO}_3\;(s)[/tex] and dilute HCl reacts with lime water (saturated calcium hydroxide [tex]\text{Ca}(\text{OH})_2\;(aq)[/tex] solution in water) to form the white-colored, insoluble salt calcium carbonate [tex]\text{CaCO}_3\;(s)[/tex]. The [tex]\text{CaCO}_3\;(s)[/tex] precipitate will turn the lime water milky.

In summary,

[tex]\rm \underbrace{\text{Na}_2\text{CO}_3\;(\rm aq)}_{\text{White Precipitate}} + \text{MgCl}_2 \;(aq) \to 2\;\text{NaCl}\;(aq) + \underbrace{\text{MgCO}_3\;(\rm s)}_{\text{White Precipitate}[/tex].

[tex]\rm \underbrace{\text{MgCO}_3\;(\rm s)}_{\text{From Solution X}} + \text{HCl} \;(aq) \to \text{MgCl}_2\;(aq) + \rm H_2O\;( aq) + \underbrace{{\rm CO_2}\;(g)}_{\rm Colorless\;Gas}[/tex].

[tex]\rm Ca(OH)_2\;(aq)+CO_2\;(g)\to \underbrace{\rm CaCO_3\;(s)}_{\begin{aligned}&\small\text{Turns Lime}&\\[-0.5em]&\small\text{Water Milky}&\end{aligned}} + H_2O\;(l)[/tex].

Answer:

Precipitate.

Explanation:

The reaction between AgNO₃ and NaCl:

AgNO₃ + NaCl → AgCl↓ + NaNO₃

It will produce insoluble substance (AgCl) which is considered as a precipitate.

Answer:

97.54

Explanation:

Molar mas of cu (oh) 2

Cu = 63.54

O x 2  = 16 x 2 = 32

H x 2 = 1 x 2 = 2

TOTAL = 97.54

The answer is:

The new volume is 2.84 L.

[tex]V_{2}=2.84L[/tex]

To solve the problem, we need to remember what STP means. STP means that the gas is at standard temperature and pressure, or 273.15 K (0°C) and 1 atm.

Also, we need to use the Combined Gas Law, since the temperature, the pressure and the volume are being changed.

The Combined Gas Law establishes a relationship between the temperature, the pressure and the volume of an ideal gas using , Gay-Lussac's Law, Charles's Law,  and Boyle's Law.

The law is defined by the following equation:

[tex]\frac{P_{1}V{1}}{T_{1}}=\frac{P_{2}V{2}}{T_{2}}[/tex]

Where,

[tex]P_{1}[/tex] is the first pressure.

[tex]V_{1}[/tex] is the first volume.

[tex]T_{1}[/tex] is the first temperature.

[tex]P_{2}[/tex] is the second pressure.

[tex]V_{2}[/tex] is the second volume.

[tex]T_{2}[/tex] is the second temperature.

So, we are given the following information:

[tex]V_{1}=2L\\P_{1}=1atm\\T_{1}=0\°C=273.15K\\P_{2}=80kPa=0.8atm\\T_{2}=37\°C=37+273=310K[/tex]

Then, isolating the new volume, and substituting, we have:

[tex]\frac{P_{1}V{1}}{T_{1}}=\frac{P_{2}V{2}}{T_{2}}\\\\V_{2}=\frac{P_{1}V{1}}{T_{1}}*\frac{T_{2}}{P_{2}}\\\\V_{2}=\frac{1atm*2L}{273.15K}*\frac{310K}{0.8kPa}=2.84L[/tex]

Hence, the new volume is 2.84 L.

[tex]V_{2}=2.84L[/tex]

Have a nice day!

Answer:

Photosynthesis in plants converts solar energy into chemical energy using electrons and protons from water. The process of photosynthesis in plants involves a series of steps and reactions that use solar energy, water, and carbon dioxide to produce organic compounds and oxygen

Answer:

Solar energy is converted to chemical energy in the chemical bonds of the glucose molecule.

Explanation: