A motorcyclist changes the velocity of his bike from 20.0 meters/second to 35.0 meters/second under a constant acceleration of 4.00 meters/second2. How long does it take the bike to reach the final velocity?

A.
2.02 seconds
B.
–2.02 seconds
C.
3.75 seconds
D.
–3.75 seconds

Answer:

the events of the story

Explanation:

hope this helps

A 0.195m aqueous solution of K₂S will contain three particles for every formula unit of K₂S that dissolves in water.

Given that we have

Solution of K₂S

The above means that

two potassium ions (K⁺) and one sulfide ion (S²⁻).

So, we have

Particles = 2 + 1

Evaluate

Particles = 3

One a broader concept:

K₂S dissociates into three particles when it dissolves in water: two K⁺ ions and one S²⁻ ion.

This is because K₂S is an ionic compound and dissociates into its constituent ions in water.

Therefore, the number of particles is 3

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0.112 L CO₂ is the volume of carbon dioxide.

Glucose ferments decompose to form the ethanol and carbon dioxide.

Balanced equation :  C₆H₁₂O₆  ----> 2C₂H₅OH (aq) + 2CO₂ (g)

By using formula, M= m/n

Where,

M⇒ Molar mass

m⇒ Mass of a substance (in grams)

n⇒ Number of moles of a substance

The molar mass (M) of C₆H₁₂O₆ (aq) ⇒180.156 g/mol

Calculating the moles(n) of C₆H₁₂O₆(aq) .

n ⇒ m/M

m ⇒ mass ⇒ 0.9 C₆H₁₂O₆

M ⇒ molar mass

n ⇒180.156g/mol C₆H₁₂O₆

n ⇒ 0.9g C₆H₁₂O₆/ 180.156 g/mol

n⇒ 0.005 mol C₆H₁₂O₆

Calculating moles(m) of CO₂ :

m⇒0.005 mol CaCO₃× (1 mol CO₂/1 mol  C₆H₁₂O₆)

m⇒ 0.005 mol CO₂

At STP of 273.15 K (0°C) and 1 atm, the molar volume of a gas is 22.414 L/mol.

Calculating volume of CO₂ :

Multiply the mole CO₂ by the molar volume to get the volume of CO₂ in liters.

⇒ 0.005 mol CO₂× 22.414 L/mol

⇒ 0.112 L CO₂  to three significant figures

Converting volume CO₂ in L to mL.

⇒ 0.112 L CO₂ × 1000 mL/L

⇒ 112.07 mL CO₂

Volume of CO₂ ⇒ 0.112 L CO₂  or 112.07 mL CO₂

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Answer:

A. Actual Yield

Since all of the others are calculated not measured outright.

Answer:

Forecasters use satellite data to estimate characteristics of a storm, including the location of its center, its past motion (within 6-12 hours), and its intensity (maximum wind speed). Atlantic and Pacific Geostationary (GOES) satellites can continuously observe hurricanes from their formation to dissipation.

Answer:

Explanation:

4,5 diethyl-2 fluoro-3-methylheptanal

The pH of a buffer solution that is 0.15 M chloroacetic acid (C2H3ClO2) and 0.10 M sodium

chloroacetate is 2.7.

Buffer Solution is defined as a water solvent based solution that is mostly consists of a mixture having weak acid and conjugate base of the weak acid, or in other word solution of a weak base and conjugate acid of the weak base.

The buffer solution always acidic or basic.

[H+] = Ka × [weak acid] / [salt] × valancy

[salt] = 0.10M

[weak acid] = 0.15M

Ka = 1.3 x 10-3

[H+] = 1.3 x 10-3 × 0.15/ 0.10

= 0.00195M

Now, as we know that

pH = -log[H+]

= -log(0.00195M)

= 2.7

Thus, we concluded that the pH of a buffer solution that is 0.15 M chloroacetic acid (C2H3ClO2) and 0.10 M sodium

chloroacetate is 2.7.

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The wavelength of the first line (n=4 to n=3) in the Balmer series is 656.3 nm. The wavelength of the second line (n=4 to n=2) in the Balmer series is 486.1 nm. The wavelength of the third photon, calculated above, is 594.1 nm.

The hydrogen atom has a single electron in its shell. Electrons in a hydrogen atom have a set of allowed energy levels. The ground state has the lowest energy level, and n represents the electron's energy level in the hydrogen atom.

Electrons gain energy and rise to a higher energy level when they are stimulated by energy from an external source such as an electric current or a photon beam.The hydrogen atom is said to be excited when its electron absorbs energy and rises to a higher energy level.

The excited atom then emits the energy in the form of electromagnetic radiation, which includes visible light and other wavelengths.The hydrogen atom has a characteristic spectrum due to the transitions between its energy levels. The wavelengths of photons absorbed or emitted when electrons in a hydrogen atom move between energy levels are determined by the following equation:

E=(hc)/λ whereE = energy of the photonh = Planck's constanctc = speed of lightλ = wavelength of the photonLet us now determine the wavelengths of the other two photons. When a hydrogen atom is excited from its ground state to the n=4 state, it emits a series of spectral lines known as the Balmer series.

The Balmer series is a series of lines in the visible light region of the spectrum. The wavelength of the first line (n=4 to n=3) in the Balmer series is 656.3 nm. The wavelength of the second line (n=4 to n=2) in the Balmer series is 486.1 nm.The third photon's wavelength can be calculated as follows

:Energy of the photon = (hc)/λEnergy of the photon = (6.626 x 10^-34 J s) x (2.998 x 10^8 m/s) / (1882 x 10^-9 m) = 3.328 x 10^-19 JThe wavelength of the third photon is calculated as follows: Energy of the photon = (hc)/λ3.328 x 10^-19 J = (6.626 x 10^-34 J s) x (2.998 x 10^8 m/s) / λλ = (6.626 x 10^-34 J s) x (2.998 x 10^8 m/s) / (3.328 x 10^-19 J)λ = 594.1 nmThe first two wavelengths are given by the Balmer series.

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Answer:

mechanical digestion is the physical part of digestion

Answer:

mechanical digestion

Explanation:

A mineral's crystal classification deals mostly with its Shape (internal arrangement of atoms).

A mineral's crystal classification primarily deals with its internal arrangement of atoms or ions, which ultimately influences its external shape. The arrangement of atoms or ions within a mineral's crystal lattice determines its crystal structure, which is characterized by repeating patterns of the constituent particles.

The crystal structure of a mineral is determined by the arrangement and bonding of its constituent atoms or ions. These arrangements can be described in terms of symmetry and coordination. Symmetry refers to the regular and repeated patterns in which atoms or ions are positioned within the crystal lattice, while coordination describes the number and arrangement of neighbouring atoms or ions around a central atom or ion.

There are several crystal systems used to classify minerals based on their symmetry and external shape. The crystal systems include cubic, tetragonal, orthorhombic, hexagonal, rhombohedral (trigonal), and monoclinic. Each crystal system has its unique set of symmetry elements and characteristic shapes.

The crystal classification of minerals is crucial because it provides valuable information about their internal structure, physical properties, and behaviour. Different crystal structures can affect a mineral's optical properties, cleavage planes, hardness, and other characteristics.

Therefore, while a mineral's shape is a visible manifestation of its crystal structure, the crystal classification primarily focuses on the internal arrangement of atoms or ions within the crystal lattice. The crystal structure, determined by the arrangement and bonding of constituent particles, influences a mineral's external shape, physical properties, and behaviour.

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Answer:

For hydrogen. H

Explanation:

Atomic number is 1

Proton number is 1

Mass number is 2

Neutron number is 1

Answer:

the answer is 55 degrees Celsius

NaHCO3(s) + HC2H3O2(aq) → CO2(g) + H2O(l) + NaC2H3O2(aq)

This equation represents the reaction of baking soda (sodium bicarbonate) with vinegar (acetic acid) to generate carbon dioxide gas, water, and sodium acetate.

The balanced equation for the reaction of NaHCO3(s) with HC2H3O2(aq) including phase symbols is

NaHCO3(s) + HC2H3O2(aq) → CO2(g) + H2O(l) + NaC2H3O2(aq)

Baking soda, also known as sodium bicarbonate, is a white, crystalline powder with the chemical formula NaHCO3. It is an alkaline substance that neutralizes acids.

Vinegar is mostly composed of acetic acid, HC2H3O2, which is a weak acid. Vinegar has a sour flavor and a strong smell due to the presence of acetic acid.

NaHCO3(s) + HC2H3O2(aq) → CO2(g) + H2O(l) + NaC2H3O2(aq)  This equation represents the reaction of baking soda (sodium bicarbonate) with vinegar (acetic acid) to generate carbon dioxide gas, water, and sodium acetate. When the baking soda and vinegar are combined, a chemical reaction occurs, causing carbon dioxide gas bubbles to form. This is due to the reaction between the acid and base in the mixture, which generates carbon dioxide gas as a byproduct. This reaction is commonly used in baking as a leavening agent to make cakes, muffins, and other baked goods rise.

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Answer:

C) 0.121 M

Explanation:

HCl + H₂O = H₃O⁺ + OH⁻

.121M              .121M

HCl is a strong acid . It will dissociate almost 100 % so the concentration of acid and hydronium ion formed will be equal . It is to be noted that hydronium ion is formed due to association of H⁺ and H₂O . H⁺ is formed due to ionisation of HCl .

So concentrtion of hydronium ion ( H₃O⁺ ) will be .121 M.

Answer:

m=175

Explanation:

100/16 = 6.25

6.25x28 = 175

Answer: To solve this equation for m, you can divide both sides of the equation by 0.16. This will give you:

m = 28 / 0.16

Simplifying the right side of the equation gives:

m = 175

Therefore, m = 175.

Explanation:

Answer:

granoblastic metamorphic rock

Explanation:

Answer:

N2S2

I just took the quiz and it was right

Answer:

tell me the question i cant see the picture

Explanation:

Answer:

45 km

Explanation:

To find the distance Tylee walked, multiply her speed by the time.

\(d=10(4.5)\)

\(d =45\)

The distance Tylee walked is 45 kilometers.

I hope this helped :)

Tylee walked 45 km from her parents' farm into town .

Speed can be understood as the measure of  how fast an object is moving.

It is the rate at which an object covers certain distance in fixed amount of time.

It is scalar quantity and its S.I. unit is m/sec .

\(\rm Speed = \dfrac{distance}{time}\)

It is given in the question speed = 10 km/h and time = 4.5 hr

So,

\(\rm Distance = Speed\; \times\;time\)

\(\rm Distance = 10\; \times\;4.5\\\\\rm Distance = 45 \;km\\\)

Therefore Tylee walked 45 km from her parents' farm into town .

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Answer:

Calcium

Explanation:

The number of protons is the atomic number of the element. Number 20 on the periodic table is Calcium.

\(\qquad \qquad\huge \underline{\boxed{\sf Answer}}\)

Here's the balanced equation for given Double displacement reaction ~

\( \sf Pb(NO_3)_2 +2 \: KI = PbI_2 +2 \: KNO_3\)

The products fored are : Lead Iodide ( PbI2 ) and Potassium Nitrate ( KNO3 )

\(\\ \rm\Rrightarrow Pb(NO_3)_2+2KI\longrightarrow 2KNO_3+PbI_2\)

On both sides

Answer:

Transition Metals are all of the elements kn group 3-12.

The number of moles of iron produced can be obtained by the use of  stoichiometry.

The term stoichiometry has to do with mass - mole or mass - volume relationships. Stoichiometric relationships could be used to determine the amount of substance.

Now the reaction equation as well as other details are not shown in this question hence a numerical anwer can not be provided. As such, we can know that the balanced reaction equation can always be used to obtain the amount of iron by stoichiometry.

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Answer:

C₃H₅N₃O₉

Explanation:

Molar mass of nitroglycerin (Ratio of mass and moles of the compound) is:

1.00g / 0.0041mol = 226.8g/mol

We can write the equations:

0.6H = C (1)

-60% as many carbon atoms as hydrogen atoms-

3N = O (2)

C = N

Using as basis the atoms of Carbon:

Carbon = 1

Nitrogen = 1

Oxygen = 3

Hydrogen = 1/0.6 = 1.67

A molecular formula has just whole numbers. This ratio of atoms times 3:

Carbon = 3

Nitrogen = 3

Oxygen = 9

Hydrogen = 5

C₃H₅N₃O₉. Molar mass of this formula is:

C = 12.01g/mol*3 = 36.03g/mol

H = 1.01g/mol*5 = 5.05g/mol

N = 14g/mol*3 = 42g/mol

O = 16g/mol*9 = 144g/mol

Molar mass:

36.03g/mol + 5.05g/mol + 42g/mol + 144g/mol = 227g/mol ≈ 226.8g/mol

That means molecular formula of nitroglycerin is:

The molecular formula of nitroglycerin is C₃H₅O₉N₃

Mass of nitroglycerin = 1.00 g

A number of moles of nitroglycerin =  0.0041 mol

It is required to calculate the molecular formula of nitroglycerin.

An empirical formula tells us the relative ratios of different atoms in a compound.

The molecular formula of nitroglycerin can be estimated with the help of empirical formula.

The molar mass of nitroglycerin (Ratio of mass and moles of the compound) is:

1.00g / 0.0041mol = 226.8 g/mol

We can write the equations:

0.6H = C (1)

-60% as many carbon atoms as hydrogen atoms-

3N = O (2)

C = N

Using as basis the atoms of Carbon:

Carbon = 1

Nitrogen = 1

Oxygen = 3

Hydrogen = 1/0.6 = 1.67

A molecular formula has just whole numbers. This ratio of atoms times 3:

Carbon = 3

Nitrogen = 3

Oxygen = 9

Hydrogen = 5

C₃H₅N₃O₉.

Molar mass of this formula is:

C = 12.01g/mol*3 = 36.03g/mol

H = 1.01g/mol*5 = 5.05g/mol

N = 14g/mol*3 = 42g/mol

O = 16g/mol*9 = 144g/mol

Molar mass:

36.03g/mol + 5.05g/mol + 42g/mol + 144g/mol = 227g/mol ≈ 226.8g/mol

That means molecular formula of nitroglycerin is:

C₃H₅N₃O₉

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Answer:

have a p000000000000000000

Answer:

56.64°c

Explanation:

its obtained from facts that heat gained by water=heat lost by calorimeter

True. Photons with energy greater than 105 kJ/mol can induce the ozone destruction reaction, causing the O3 molecule to break into O and O2. This is because the energy of the photons is sufficient to overcome the activation energy barrier required for the reaction to occur.

The energy required for the ozone destruction reaction is 105 kJ/mol. If a photon possesses energy greater than this threshold, it can provide the necessary energy for the reaction to take place. When a photon with sufficient energy collides with an ozone molecule (O3), it can transfer its energy to the molecule, breaking it into oxygen atoms (O) and molecular oxygen (O2).

This process is called photodissociation and is responsible for the destruction of ozone in the upper atmosphere. Thus, photons with energy exceeding the activation energy can induce the ozone destruction reaction.

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Answer:

Ca2+ I'm not sure hahahahhahah

Answer:

Ca

hope it is helpful..