The graph shows a heating curve for water.




Which point on the graph indicates that all of the liquid water has been converted to water vapor?


1

2

3

4

Answer:

where are the answer choices

Answer:

i think d is the answer for this

Answer:

the addition of sodium chloride to water effect a lowering of the melting point of water such that the liquid cream or water mixture tends to solidify upon churning when in thermal contact with the mix indigrents

Answer:

a. 3; b. 5; c. 10; d. 12

Explanation:

pH is defined as the negative log of the hydronium concentration:

pH = -log[H₃O⁺] (hydronium concentration)

For problems a. and b., HCl and HNO₃ are strong acids. This means that all of the HCl and HNO₃ would ionize, producing hydronium (H₃O⁺) and the conjugate bases Cl⁻ and NO₃⁻ respectively. Further, since all of the strong acid ionizes, 1 x 10⁻³ M H₃O⁺ would be produced for a., and 1.0 x 10⁻⁵ M H₃O⁺ for b. Plugging in your calculator -log[1 x 10⁻³] and -log[1.0 x 10⁻⁵] would equal 3 and 5, respectively.

For problems c. and d. we are given a strong base rather than acid. In this case, we can calculate the pOH:

pOH = -log[OH⁻] (hydroxide concentration)

Strong bases similarly ionize to completion, producing [OH⁻] in the process; 1 x 10⁻⁴ M OH⁻ will be produced for c., and 1.0 x 10⁻² M OH⁻ produced for d. Taking the negative log of the hydroxide concentrations would yield a pOH of 4 for c. and a pOH of 2 for d.

Finally, to find the pH of c. and d., we can take the pOH and subtract it from 14, giving us 10 for c. and 12 for d.

(Subtracting from 14 is assuming we are at 25°C; 14, the sum of pH and pOH, changes at different temperatures.)

Answer:

reproduction i would believe

Explanation:

if correct plz mark brainliest

Answer:

Reproduction :)

Explanation:

hope this helps

Answer:

The volume required is 2.24L

Explanation:

The slaked lime Ca(OH)2, reacts with chlorine, Cl2, as follows:

6Cl₂(g) + 3Ca(OH)₂(s) → Ca(ClO₃)₂ (aq) + 2CaCl₂ (aq) + 6HCl (aq)

Where 6 moles of chlorine react with 3 moles of slaked llime,

To solve this question we must find the moles of slaked lime added. With these moles we can find the moles of chlorine required and its volume at STP as follows:

Moles Ca(OH)2 - Molar mass: 74.093g/mol-

3.70g * (1mol / 74.093g) = 0.0500 moles Ca(OH)2

Moles Cl₂:

0.0500 moles Ca(OH)2 * (6 mol Cl₂ / 3 mol Ca(OH)2) =

0.100 moles Cl₂

Now using PV = nRT

nRT / P = V

Where n are moles: 0.100 moles

R is gas constant = 0.082atmL/molK

T is absolute temperature = 273K at STP

P is pressure = 1atm at STP

And V is volume, our incognite:

0.100mol*0.082atmL/molK*273K / 1atm = V

2.24L = Volume of Cl₂

Answer:

D. Alkali metal ions will not have a negative  one charge; they will have a positive one  charge

Explanation:

Alkali metals are a found towards the left hand side of the periodic table. The comprise of Li, Na, K, Rb, Cs and Fr.

They form univalent positive ions such as Cs^+, Na^+ etc. They do not form negative ions but give out one electron to form the sort of ions stated above. Recall that metals are electropositive in nature (donate electrons).

The mistake made by Shanice is to say that group 1 elements have a negative one  charge.

Answer:

1.2x10⁻²³M = [Ag⁺]

Explanation:

The Kf of Ag(CN)₂⁻ is:

Ag⁺(aq) + 2CN⁻ → Ag(CN)₂⁻(aq)

Kf = 1.0x10²¹ = [Ag(CN)₂⁻] / [Ag⁺] [CN⁻]²

Where [] are equilibrium concentrations.

The initial concentrations of the reactants are:

[Ag⁺] = 3.0x10⁻³M * (130mL / 355mL) = 1.10x10⁻³M

335mL is the total volume of the solution

[CN⁻] =  0.14M * (225mL / 355mL) = 0.089M

In equilibrium, the concentrations are:

[Ag⁺] = 1.10x10⁻³M - X

[CN⁻] = 0.089M - 2X

Ag(CN)₂ = X

Replacing in Kf expression:

1.0x10²¹ = [Ag(CN)₂⁻] / [Ag⁺] [CN⁻]²

1.0x10²¹ = [X] / [1.10x10⁻³ - X] [0.089 - 2X ]²

1.0x10²¹ = [X] / 8.7131×10⁻⁶ - 0.0083126 X + 0.3604 X² - 4 X³

8.7131×10¹⁵ - 8.3126×10¹⁸ X + 3.604×10^20 X² - 4x10²¹ X³ = X

8.7131×10¹⁵ - 8.3126×10¹⁸ X + 3.604×10^20 X² - 4x10²¹ X³ = 0

X = 0.0011M → Right solution.

X = 0.0445M → False solution. Produce negative concentrations

Replacing:

[Ag⁺] = 0

[CN⁻] = 0.0868M

Ag(CN)₂ = 0.0011M

The equilibrium will shift to the left just a little bit until produce a determined amount of Ag⁺ that we can write as:

[Ag⁺] = X

Thus:

1.0x10²¹ = [0.0011] / [X] [0.0868M ]²

Answer:

yes it can because heat can solidify the rubber and it does matter what light

Explanation:

The light can cause the rubber to become solid. It doesn't matter the type of light.

Any type of light can cause the rubber to become solid because all types of

light emit thermal(heat) radiation.  When they are emitted , it causes the

vaporization of some compounds thereby causing it to solidify.

In this scenario, the rubber being able to absorb ultraviolet light simply

depicts that it will solidify as a result of an increase in temperature due to

the thermal radiation.

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Answer:

B. 20m/s

Explanation:

The wavelength of a wave can be calculated using the formula;

λ = v/f

Where;

λ = wavelength (m)

v = velocity (m/s)

f = frequency (Hz)

According to the information provided in this question; the wave has a wavelength (λ) of 2m and a frequency (f) of 10Hz.

Using λ = v/f

v = λ × f

v = 2 × 10

v = 20m/s.

Answer:

No. Light is not a physical thing, so it cannot change physical things like glue.

Explanation:

Light is not effective at all to glue, it doesn't do anything at all.

Answer:

10

Explanation:

Answer:

DDDDD

Explanation:

According to the indicator theory, the hydrogen ion concentration for this solution is 1 × 10⁻⁸ M.

Indicator is defined as a chemical substance which is chemically a weak acid or a weak base which changes it's color depending upon the concentration of hydrogen ions present in the solution.They dissociate slightly in water to produce ions.

These are generally derived from plant pigments and are of slightly acidic or basic in nature.There are three types of indicators:

1) natural indicators

2) synthetic indicators

3) olfactory indicators.

These are mainly used in determination of end point of titrations. Every indicator has it's pH range in which it can perform effectively.These are usually organic compounds.

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Answer:

Explanation:

molecules NH3 = 1.47 moles x 6.02x1023 molecules/mole = 8.9x1023 molecules of NH3

The first to dissolve is the solute in tank B. The amount of a substance that dissolves in a specific solvent concentration at a specific temperature is known as its solubility.

The introduction of a solute to a solvent is the first stage in the dissolving process. The molecules of these two substances begin to interact, causing the solute molecules to disperse and become encircled by solvent molecules.

In water, salt, sugar, and coffee all dissolve. They disintegrate quickly. They typically dissolve more rapidly and completely in hot or warm water. Even very hot water won't be able to dissolve sand or pepper.

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Answer:

Saturated fat occurs naturally in red meat and dairy products. It's also found in baked goods and fried foods. Trans fat occurs naturally in small amounts in red meat and dairy products. Trans fat can also be manufactured by adding hydrogen to vegetable oil.

Explanation:

—COOH and —NH₂

Carboxylic Acid and Amino

Answer:

0.00032 M

Explanation:

From the question,

Applying the for pH

pH = -log[H⁺]............... Equation 1

Where H⁺ = Hydrogen ion concentration of Hydrochloric acid

Given: pH = 3.50

Substitute into equation 1 and solve for H⁺

3.50 = -log[H⁺]

Taking the log inverse of both side,

H⁺ = 10⁻⁽³⁵/¹⁰⁾

H⁺ = 0.00032 M

Hence the H⁺ of Hydrochloric acid is  0.00032 M

Explanation:

Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane. This gives the plant cell its unique rectangular shape. Animal cells simply have a cell membrane, but no cell wall.

Answer:

artic is correct please give brainliest please??

The nature of the indicated covalent bond in water molecule is polar.

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

The atoms that make up the molecule of water causes the water molecule to be polar because of its shape.

Thus, the nature of the indicated covalent bond in water molecule is polar.

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Answer:

5.47 B.M

Explanation:

✓We were given electronic configuration of argon as [Ar] 3d5.

✓This is a divalent ion. It has atomic number of 25.

✓magnetic moment can be calculated using below expresion

√[n(n+2)] .....................eqn(1)

✓ It has 5 unpaired electrons. Then n= 5

✓ [n(n+2)]

✓ substitute the ( n= 5) into eqn(1)

Then magnetic moment= [n(n+2)]

= [ 5(5+2) ]

= 5.47BM

Answer:

10

Explanation:

1 Fe atom+ 3 nitrogen atoms+ 6 oxygen atoms= 10 atoms

Answer:

An earthquake

Explanation:

Answer:

they help to calm the bees when the person keeping the bees inspects there hives.

Answer: Infrasound because sound waves travel easily through water to accessible buoys.

Explanation: its installation: underwater microphones hung from buoys near a volcano. how it works: senses low-frequency sound waves near a volcano. Since in its installation it specifies that it has UNDERWATER microphones and the question asks in predicting an eruption from an UNDERSEA volcano, that makes perfect sense.

Volcanologists utilize a technique called infrasound monitoring to pick up low-frequency pitches that are inaudible to human hearing and to pick up rumblings and explosions inside volcanoes. A crater can be altered by volcanic activity, which alters the shape of the infrasonic sound waves that are emitted by the volcano.

An opening in the crust of a planet or moon known as a volcano allows molten rock, heated gases, and other things to erupt. As layers of rock and ash accumulate from numerous eruptions, volcanoes frequently take the form of a hill or mountain. There are three types of volcanoes: active, dormant, and extinct.

Seismographic detection of the earthquakes and tremor that almost invariably precede eruptions, as well as exact measurements of the ground deformation that frequently coincides with the ascent of magma, are just a few of the many methods that scientists employ to monitor volcanoes.

Tiny movements along a volcano can be a sign of an impending eruption because of rock fractures along the magma chamber. Scientists can enter this data and utilize GPS and satellites to measure this deformation.

Thus,  A crater can be altered by volcanic activity, which alters the shape of the infrasonic sound waves that are emitted by the volcano.

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