A car travels with a speed of 91.4 kilometers per hour (km/hr). Convert this speed to meters per second (m/s).

Show your work.

Round your final answer to three significant figures.

Type your answer...

Answer:

2) 0.4 mol

Explanation:

Step 1: Given data

Step 2: Convert "V" to L

We will use the conversion factor 1 L = 1000 mL.

500 mL × 1 L/1000 mL = 0.500 L

Step 3: Calculate the moles of KBr (solute)

The molarity is the quotient between the moles of solute (n) and the liters of solution.

M = n/V

n = M × V

n = 0.8 mol/L × 0.500 L = 0.4 mol

Answer: 92.3 G AgCl

Explanation:

CaCl2 + 2 Ag-----> 2 AgCl + Ca

35.5 g Cacl2 x(1mole cacl2/110g caCl2) X (2 moles AgCl/1mole Cacl2) X

(143 g AgCl/1mole Agcl) =

When 35.5 grams of calcium chloride react with excess silver nitrate, 91.70 grams of silver chloride will form.

The ratio between the mass and amount of substance of any sample of a compound is called the molar mass of a chemical compound.

CaCl2 + 2AgNO3 → 2AgCl + Ca(NO3)2`

As moles of CaCl2 = mass of CaCl2 / molar mass of CaCl2

= 35.5 g / 110.98 g/mol

moles of CaCl2 = 0.3198 mol

As from equation, moles of AgCl = moles of CaCl2 x (2 moles of AgCl / 1 mole of CaCl2)

moles of AgCl = 0.3198 mol x 2

moles of AgCl = 0.6396 mol

and mass of AgCl = moles of AgCl x molar mass of AgCl

= 0.6396 mol x 143.32 g/mol

mass of AgCl = 91.70 g

Therefore, when 35.5 grams of calcium chloride react with excess silver nitrate, 91.70 grams of silver chloride will form.

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Note: The question given on the portal is incomplete. Here is the complete question.

Question: How many grams of silver chloride form when you react 35.5 grams of calcium chloride? CaCl2 + 2AgNO3 → 2AgCl + Ca(NO3)2`

Answer:

both

Explanation:

plants have mitochondria and can preform cellular respiration

animals and plants use oxygen in respiration to produce corbon dioxide

Answer:

I think it's both.

Explanation:

I just looked it up, so yeah.

Marlon can conclude that the cell belongs to the Kingdom Protista if he observes that the paramecium has a nucleus.

The presence of a nucleus is a characteristic feature of eukaryotic cells, which are found in Protists, Fungi, Plants, and Animals. Therefore, if Marlon observes that the paramecium has a nucleus, he can conclude that the cell belongs to the Kingdom Protista, which includes unicellular eukaryotic organisms.

The presence of a nucleus is one of the defining features of eukaryotic cells, which are found in Protists, Fungi, Plants, and Animals. The Protista Kingdom includes unicellular organisms that have a nucleus and other membrane-bound organelles.

However, he would need to observe other features of the cell to further classify it into a specific group or species within the Protista Kingdom.

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1

1

The general molecular formula for phenol is C6H5OH. It is an aromatic organic compound with a hydroxyl group bonded to a carbon atom of a cyclic structure. The ring structure has alternate double and single bonds. The formula of phenol is C6H5OH. Benzene has the formula C6H6. It is a hexagonal ring of six carbon atoms bonded with alternate single and double bonds. Each carbon atom in benzene has a bond with a hydrogen atom. In phenol, a hydroxyl group replaces one of the hydrogen atoms.

The reaction of CuCl2, HNO3, and AgNO3 is a redox reaction. In a redox reaction, one substance loses electrons and is oxidized, while another substance gains electrons and is reduced. In this reaction, CuCl2 is oxidized to Cu2+, HNO3 is reduced to NO, and AgNO3 is reduced to Ag.

The balanced equation for the reaction is:

CuCl2 + 2HNO3 + 2AgNO3 → Cu2+ + 2NO + 2AgCl

The products of the reaction are copper(II) ions, nitrogen monoxide gas, and silver chloride precipitate.

Here are some of the properties of phenol:

Phenol is a white crystalline solid that is soluble in water.

Phenol has a strong, characteristic odor.

Phenol is a mild acid.

Phenol is toxic and can cause burns to the skin and eyes.

Phenol is used in a variety of products, including disinfectants, antiseptics, and plastics.

Answer:

immma send you the link friend me on hereExplanation:

Answer:

what is your zoom email

teĺlllll

There are approximately 1.62 x 10^25 water molecules in the 499.8 mL bottle of water.

To determine the number of water molecules in the given volume of water, we need to use the relationship between mass, volume, and molar mass of water.

First, we need to find the mass of water in the bottle:

Mass = Density * Volume

Mass = 0.967 g/mL * 499.8 mL = 483.9 g

Next, we need to convert the mass of water to moles using the molar mass of water. The molar mass of water (H2O) is approximately 18.015 g/mol.

Moles = Mass / Molar mass

Moles = 483.9 g / 18.015 g/mol = 26.88 mol

Finally, we can calculate the number of water molecules using Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules = Moles * Avogadro's number

Number of molecules = 26.88 mol * (6.022 x 10^23 molecules/mol) = 1.62 x 10^25 molecules

Therefore, there are approximately 1.62 x 10^25 water molecules in the 499.8 mL bottle of water.

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Based on the information provided, we have a reaction between hydrogen iodide (HI) gas and hydrogen gas (H₂) to form iodine gas (I₂). The equilibrium is represented by the equation:

2HI(g) = H₂(g) + I₂(g)

The concentration values given in the table correspond to the concentrations of H₂ and HI at different times.

a) From t=0 s to t=5 s: Without the specific graph mentioned in Figure 7.10, it is difficult to provide a precise explanation of the physical situation in the container during this time period. However, based on the equilibrium reaction given, we can make some general observations. At the start (t=0 s), the concentrations of H₂ and HI may be high. As time progresses, the reaction proceeds, and the concentrations of H₂ and HI may decrease while the concentration of I₂ increases. The specific behavior will depend on the rate of the forward and reverse reactions.

b) External factor altered at t=5 s: To bring about a change in the shape of the graph at t=5 s, some external factor must have been altered. The most likely factor is the total pressure within the container. Since the reaction involves gases, changes in pressure can affect the equilibrium position. However, according to the information given, a change in pressure will not affect equilibrium in this case since the number of moles of gas is the same on both sides of the equation. Therefore, if the shape of the graph changes at t=5 s, some other external factor, such as temperature or the addition of a catalyst, must have been altered.

c) Calculation of K at t=3 s: The equilibrium constant (K) can be calculated at any given time using the concentrations of the reactants and products. However, the concentrations of H₂ and HI at t=3 s are not provided in the information given. Without the necessary data, it is not possible to calculate K at t=3 s.

Lastly, the statement "1 dm³ COCI, decomposes" seems incomplete. If you provide additional information or clarify the question, I'll be happy to assist you further.

Engineers must take into account the cultural, social, and economic factors that may affect the adoption and sustainability of the system in the target communities.

The main challenges and constraints that engineers must overcome in the design of a low-cost, portable water purification system include:

Designing a water purification system that meets these challenges and constraints requires careful consideration of the materials, technology, and resources available.

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Answer:

5700

Explanation:

The style of Vincent Van Gogh's Starry Night (1889) is Post-Impressionism.

Post-Impressionism is an art movement that developed in France in the late 19th century as a reaction against the limitations of Impressionism. It is characterized by a focus on subjective emotions and personal interpretations of the world, as well as an interest in the formal qualities of art, such as color, line, and form.

Van Gogh's work is known for its expressive use of color and texture, and Starry Night is a prime example of his Post-Impressionist style, with its swirling brushstrokes, intense colors, and dreamlike quality.

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Answer:

Bubbles formed where the acid touched the limestone. After 20 minutes, the bubbling stopped and the surface of the limestone appeared unchanged.

Answer:

the first would be an polar compound the second would be a ionic compound and the third would be nonpolar compound

Answer:

c - Record !!

Answer:

EZ ANSWER IS C

Explanation:

The given question is incomplete. The complete question is:

The standard heat of combustion is shown in the following chemical equation \(C_9H_{20}(g)+14O_2(g)\rightarrow 9CO_2(g)+10H_2O\)\(\Delta H_{rxn}=-6125.21kJ/mol\).  If 130 g of nonane combusts , how much heat is released?

Answer: 6211.21 kJ

Explanation:

Heat of combustion is the amount of heat released on complete combustion of 1 mole of substance.

Given :

Amount of heat released on combustion of 1 mole of nonane = 6125.21 kJ

According to avogadro's law, 1 mole of every substance occupies 22.4 L at NTP, weighs equal to the molecular mass and contains avogadro's number \(6.023\times 10^{23}\) of particles.

1 mole of nonane \((C_9H_{20})\) weighs = 128.2 g  

Thus we can say:  

128.2 g of nonane on combustion releases = 6125.21 kJ

Thus 130 g of \(C_4H_{10}\) on combustion releases =\(\frac{6125.21}{128.2}\times 130=6211.21kJ\)

Thus the heat of combustion of 130 g of nonane is 6211.21 kJ

Periodic table is a tabular chart of the chemical elements according to their atomic numbers so that elements with similar properties are in the same group (column).

The periodic table consists of elements arranged in a vertical (groups) and horizontal (periods) manner.

However, elements on the same group are known to have the same chemical properties because they possess the same number of valence electrons, hence, react chemically similar.

These elements have the same chemical properties because they contain the same number of valence electrons.

Example of elements with those similarities are chlorine, fluorine, iodine etc.

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Answer:

Ions.

Explanation:

Hello!

In this case, since iron is a metal which has lots of uses in the design of metallic alloys and materials, when it is at its ground state we say it is just Fe; however, since it is a metal, it is very likely to lose electrons and therefore getting positively charged as +2 or +3, say:

\(Fe^{2+}\\\\Fe^{3+}\)

Thus, since they are positively charged, they are classified as cations, which are ions.

Best regards!

Answer:

d

Explanation:

neutrons and protons have the mass nearly 1.67*10-24 g

but neutrons have no charge.. protons are positively charged

Answer:

your answer is the one that is highlighted cuz

Explanation:

Because electrodes such as silver, lead or copper precipitate with chlorine ions, it is not preferred to use NaCl or KCl solutions in the salt bridge.

What is Electrolysis?

By running a direct electric current through an ionic compound in fluid form, electrolysis is the process of breaking down the substance into its constituent parts. Anions are oxidised at the anode while cations are reduced at the cathode. An electrolyte, electrodes, and some sort of external power source are the key elements needed to perform electrolysis. A salt bridge or an ion-exchange membrane may also be employed as a partition, albeit this is optional. These are mostly utilised to prevent goods from diffusing close to the opposing electrode.

By applying electric current to the water's primary components, hydrogen and oxygen, an acidified or salty water can be broken down. Atoms of sodium and chlorine can separate from molten sodium chloride.

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Answer: Ecosystem services are the flows of benefits which people gain from natural ecosystems, and natural capital is the stock of natural ecosystems from which these benefits flow. So, a forest is a component of natural capital, while climate regulation or timber might be the ecosystem service it provides.

Answer:

approximately 137.3 grams of P2O3 will form if one uses 78 grams of oxygen.

Explanation:

Diphosphorus trioxide, P2O3, is formed from the reaction of phosphorus with oxygen:

P4 + 5O2 -> 2P2O3

To determine how many grams of P2O3 will form from 78 grams of oxygen, we need to know how much phosphorus is also involved in the reaction. If we assume that there is enough phosphorus present, then we can calculate the amount of P2O3 that will be produced.

The balanced equation tells us that for every 2 moles of P2O3 that are produced, 4 moles of P4 and 5 moles of O2 are consumed. From the number of moles of O2, we can calculate the number of moles of P2O3 produced using the ratio from the balanced equation:

78 g O2 / (32 g/mol O2) = 2.43 mol O2

2.43 mol O2 * (2 mol P2O3 / 5 mol O2) = 0.972 mol P2O3

Finally, we can convert the number of moles of P2O3 to grams:

0.972 mol P2O3 * (141.94 g/mol P2O3) = 137.3 g P2O3

So, approximately 137.3 grams of P2O3 will form if one uses 78 grams of oxygen.

Answer:

The cell potential for the given galvanic cell is 0.188 V.

Explanation:

To calculate the cell potential, we can use the Nernst equation:

Ecell = E°cell - (RT/nF)ln(Q)

where E°cell is the standard cell potential, R is the gas constant (8.314 J/mol·K), T is the temperature in Kelvin (25°C = 298 K), n is the number of moles of electrons transferred (in this case, n = 2), F is the Faraday constant (96,485 C/mol), and Q is the reaction quotient.

First, we need to write the half-reactions and their standard reduction potentials:

Sn4+(aq) + 2e- → Sn2+(aq) E°red = 0.15 V

Fe3+(aq) + e- → Fe2+(aq) E°red = 0.77 V

The overall reaction is the sum of the half-reactions:

Sn2+(aq) + 2Fe3+(aq) → Sn4+(aq) + 2Fe2+(aq)

The reaction quotient Q can be expressed as:

Q = [Sn4+][Fe2+]^2 / [Sn2+][Fe3+]^2

Substituting the given concentrations, we get:

Q = (0.00655)(0.01139)^2 / (0.0624)(0.0437)^2 = 0.209

Now we can calculate the cell potential:

Ecell = 0.15 V + 0.0592 V log([Fe2+]^2/[Fe3+]) + 0.0592 V log([Sn4+]/[Sn2+])

= 0.15 V + 0.0592 V log(0.01139^2/0.0437^2) + 0.0592 V log(0.00655/0.0624)

= 0.188 V

Therefore, the cell potential for the given galvanic cell is 0.188 V.

The cell potential for the given galvanic cell in which the given reaction occurs at 25 °C is 0.188 V.

To find the cell potential, we take the Nernst equation:

Ecell = E°cell - (RT/nF)ln(Q)

In which R is the gas constant (8.314 J/mol·K) and E° cell is the standard cell potential.

T temperature in Kelvin (25°C = 298 K), and n is the number of moles of electrons transferred (n = 2), Q is the reaction quotient and F is the Faraday constant (96,485 C/mol).

Firstly, write the half-reactions and then their standard reduction potentials:

Sn⁴⁺(aq) + 2e⁻  → Sn²⁺(aq) E°red = 0.15 V

Fe³⁺(aq) + e⁻ → Fe²⁺(aq) E°red = 0.77 V

The overall reaction is the sum of the half-reactions:

Sn²⁺(aq) + 2Fe³⁺(aq) → Sn⁴⁺(aq) + 2Fe²⁺(aq)

The Q reaction quotient can be written as:

Q = [Sn⁴⁺][Fe²⁺]² ÷ [Sn²⁺][Fe²⁺]²

Substituting the given concentrations, we observe:

Q = (0.00655)(0.01139)² ÷ (0.0624)(0.0437)² = 0.209

Next, we can find the cell potential:

Ecell = 0.15 V + 0.0592 V log([Fe²⁺]²/[Fe³⁺]) + 0.0592 V log([Sn⁴⁺]/[Sn²⁺])

= 0.15 V + 0.0592 V log(0.01139²÷0.0437²) + 0.0592 V log(0.00655÷0.0624)

= 0.188 V

Thus, the cell potential for the given galvanic cell is 0.188 V.

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When 7.524 is rounded to 3 significant figures, it will be 7.52.

The process of changing a number to a nearby number with fewer significant digits is known as rounding.

Rounding can be done to the nearest integer, the nearest tenth, the nearest hundredth, and so on.

Here are some pointers on rounding numbers to a certain number of significant digits:If the digit following the last significant digit is less than 5, simply drop it and all following digits.

(round down)For example, 2.832 rounded to two significant digits is 2.8 since the 3 is followed by a 2 which is less than 5.

If the digit following the last significant digit is greater than 5, add 1 to the last significant digit, then drop all of the digits that follow it.

(round up)For example, 4.673 rounded to two significant digits is 4.7 since the 3 is followed by a 7 which is greater than 5.

If the digit following the last significant digit is exactly 5, the preceding digit is odd, and no other digits follow, increase the last significant digit by 1.

If the digit following the last significant digit is exactly 5, the preceding digit is even, and no other digits follow, simply leave the last significant digit alone.

For example, 2.875 rounded to two significant digits is 2.9 since the 5 is followed by an odd number, which means that the 8 should be rounded up, while 2.765 rounded to two significant digits is 2.8 since the 5 is followed by an even number, which means that the 6 should be left alone.

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Answer:

The name of the ionic compound LiCl is Lithium Chloride

Answer:

A. CODIS

Explanation:

The Combined DNA Index System (CODIS), administered by the FBI, maintains DNA profiles obtained through federal, state, and local DNA sample collection programs, and makes this information available to law enforcement agencies across the country for law enforcement identification purposes.