Carlos rides his bike away from the school at a constant speed. Explain what a
distance-time graph for this type of motion
would look like.

The answer is A: Oil.

Answer:

Explanation:

A. Oil

hope it helps!

In this case, we have an oxide since the compound contains oxygen at the end of the molecule.

Because we have 5 oxygens we will have a pentaoxide. The atom that goes with the oxygen is nitrogen and we have two nitrogen atoms, so we have a dinitrogen pentoxide.

15.6 grams of water are formed when 500.0 kJ of energy is released in the synthesis of water from its elements.

The balanced chemical equation for the synthesis of water from its elements is:

O2(g) + 2H2(g) → 2H₂O(l) + 572 kJ

The given energy change is -500.0 kJ, which means that energy is released during the reaction.

We can use the relationship between the amount of energy released and the amount of substance involved in the reaction to calculate the mass of water formed.

The molar enthalpy change for the reaction can be calculated as follows:

ΔH = -500.0 kJ/mol H2O

The molar enthalpy change tells us how much energy is released when 1 mole of water is formed.

The molar mass of water (H2O) is 18.015 g/mol.

To calculate the mass of water formed, we can use the following equation:

mass of water = (ΔH / molar enthalpy change) x molar mass of water

mass of water = (-500.0 kJ / mol H2O / -572 kJ/mol) x 18.015 g/mol

mass of water = 15.6 g

Therefore, 15.6 grams of water are formed when 500.0 kJ of energy is released in the synthesis of water from its elements.

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In the given reaction, the limiting reactant is C₆H₆ (benzene).

To determine the limiting reactant as well as calculate the mass of HCl produced, compare the moles of each reactant.

The number of moles for each reactant:

Molar mass of Cl₂ = 35.5 g/mol + 35.5 g/mol = 71 g/mol

Moles of Cl₂ = mass of Cl₂ / molar mass of Cl₂

                     = 45 g / 71 g/mol

                     = 0.634 moles of Cl₂

Molar mass of C₆H₆ (benzene) = 12 g/mol + 6(1 g/mol) = 78 g/mol

Moles of C₆H₆ = mass of C₆H₆ / molar mass of C₆H₆

                        = 45 g / 78 g/mol = 0.577 moles of C₆H₆

Determine the stoichiometry between Cl₂ and HCl:

Cl₂ + C₆H₆ → C₆H₅Cl + HCl

Here, we can see that 1 mole of Cl₂ produces 1 mole of HCl.

Thus, the limiting reactant is C₆H₆ (benzene).

Calculate the mass of HCl produced:

Molar mass of HCl = 1 g/mol + 35.5 g/mol = 36.5 g/mol

Moles of HCl produced = moles of C₆H₆ = 0.577 moles

Mass of HCl produced = moles of HCl produced × molar mass of HCl

Mass of HCl produced = 0.577 moles × 36.5 g/mol

                                     ≈ 21.04 g

Therefore, approximately 21.04 grams of HCl will be produced.

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Applying physical and scientific concepts to the design, development, and maintenance of both the artificially produced environment as well as the naturally occurring built environment is known as civil engineering. The correct option is B.

In both the public and private sectors, civil engineers conceptualize, design, develop, supervise, run, and maintain infrastructure projects and systems, such as highways, buildings, airports, tunnels, dams, bridges, and water supply and sewage treatment systems.

Traditionally, civil engineering has been divided into a variety of sub-disciplines. It is defined to separate non-military engineering from military engineering and is regarded as the second-oldest engineering subject after military engineering.

A civil engineer make brainstorming ways to prevent landslides on steep slopes. In some locations, a civil engineer is qualified to do land surveying; in other locations, surveying is only permitted for building purposes without a different licence.

Thus the correct option is B.

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Answer:

(a): Precipitate of calcium carbonate will form.

(b): Precipitate of barium sulfate will form.

(c): Precipitate of silver iodide will form.

(d): Precipitate of sodium chromate will form.

Explanation:

Complete ionic equation is defined as the equation in which all the substances that are strong electrolytes present in an aqueous state and are represented in the form of ions.

Net ionic equation is defined as the equations in which spectator ions are not included.

Spectator ions are the ones that are present equally on the reactant and product sides. They do not participate in the reaction.

(a):

The balanced molecular equation is:

\(CaCl_2(aq)+K_2CO_3(aq)\rightarrow 2KCl(aq)+CaCO_3(s)\)

The complete ionic equation follows:

\(Ca^{2+}(aq)+2Cl^-(aq)+2K^+(aq)+CO_3^{2-}(aq)\rightarrow 2K^+(aq)+2Cl^-(aq)+CaCO_3(s)\)

As potassium and chloride ions are present on both sides of the reaction. Thus, they are considered spectator ions.

The net ionic equation follows:

\(Ca^{2+}(aq)+CO_3^{2-}(aq)\rightarrow CaCO_3(s)\)

Precipitate of calcium carbonate will form.

(b)

The balanced molecular equation is:

\(BaCl_2(aq)+MgSO_4(aq)\rightarrow MgCl_2(aq)+BaSO_4(s)\)

The complete ionic equation follows:

\(Ba^{2+}(aq)+2Cl^-(aq)+Mg^{2+}(aq)+SO_4^{2-}(aq)\rightarrow Mg^{2+}(aq)+2Cl^-(aq)+BaSO_4(s)\)

As magnesium and chloride ions are present on both sides of the reaction. Thus, they are considered spectator ions.

The net ionic equation follows:

\(Ba^{2+}(aq)+SO_4^{2-}(aq)\rightarrow BaSO_4(s)\)

Precipitate of barium sulfate will form.

(c):

The balanced molecular equation is:

\(AgNO_3(aq)+KI(aq)\rightarrow KNO_3(aq)+AgI(s)\)

The complete ionic equation follows:

\(Ag^{+}(aq)+NO_3^-(aq)+K^+(aq)+I^{-}(aq)\rightarrow K^+(aq)+NO_3^-(aq)+AgI(s)\)

As potassium and nitrate ions are present on both sides of the reaction. Thus, they are considered spectator ions.

The net ionic equation follows:

\(Ag^{+}(aq)+I^{-}(aq)\rightarrow AgI(s)\)

Precipitate of silver iodide will form.

(d):

The balanced molecular equation is:

\(2NaCl(aq)+(NH_4)_2CrO_4(aq)\rightarrow 2NH_4Cl(aq)+Na_2CrO_4(s)\)

The complete ionic equation follows:

\(2Na^{+}(aq)+2Cl^-(aq)+2NH_4^+(aq)+CrO_4^{2-}(aq)\rightarrow 2NH_4^+(aq)+2Cl^-(aq)+Na_2CrO_4(s)\)

As ammonium and chloride ions are present on both sides of the reaction. Thus, they are considered spectator ions.

The net ionic equation follows:

\(2Na^{+}(aq)+CrO_4^{2-}(aq)\rightarrow Na_2CrO_4(s)\)

Precipitate of sodium chromate will form.

Answer:

not sure if it's right because there are no choices but most likely a chemical change

Two elements that could displace iron in a single replacement reaction are magnesium and zinc. This determination is made based on the reactivity series, which ranks metals according to their ability to displace other metals in aqueous solutions.

An element replaces another element in a compound in a single replacement reaction, creating a new compound and a different element.

The reactivity series determines the displacement of metals in single replacement reactions by ranking metals in order of their reactivity, with the most reactive metal displacing less reactive metals from their compounds.

Magnesium and zinc, which are more reactive than iron, can displace iron in a single replacement reaction.

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Answer:

Producers produce their own food using energy from sunlight. Yes they are the basis since they are the base in a food pyramid

Concentration of H3O+ = 0.00037mol/L

pH = -log (0.00037) = 3.43

pOH = 14-3.43. = 10.57

Hence, molarity of

OH-= antilog (-10.57)=0.269

10-10mol/L

Answer:

3

Explanation:

The three things that can affect a condition to enforce a slide is friction, weight, and slope of an area. Solutions that can make flow easily are those that can create less friction depending on the condition of an environment where it is present.

The line that represents the motion of the cathode ray in an electric field is line A.

The correct option is C.

Electron streams can be seen in discharge tubes as cathode rays or electron beams. When a voltage is applied to an evacuated glass tube with two electrodes, it can be seen that the glass behind the positive electrode glows as a result of the cathode's emission of electrons.

Cathode rays are deflected to the positive electrode.

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Answer:

2.5 × 10² L

Explanation:

Step 1: Given and required data

Step 2: Convert 25 °C to Kelvin

We will use the following expression.

K = °C + 273.15 = 25 + 273.15 = 298 K

Step 3: Calculate the volume (V) of the balloon

We will use the ideal gas equation.

P × V = n × R × T

V = n × R × T / P

V = 9.7 mol × (0.0821 atm.L/mol.K) × 298 K / 0.955 atm = 2.5 × 10² L

Answer:

1.8 m³

Explanation:

To find the volume, you need to multiply the given mass by the density. Density can serve as a conversion between mass (kg) and volume (m³) because it is a ratio which represents the mass (kg) of a piece of wood per every 1 m³. It is important to arrange this ratio in a way that allows for the cancellation of units (kg should be in the denominator to cancel the units of the given mass). The final answer should have 2 sig figs like the given mass (1.5 = 2 sig figs).

Denisty: 0.82 kg/m³

   1.5 kg                 1 m³
---------------  x  --------------------  =  1.8 m³
                           0.82 kg

Answer: The complete molecular, ionic, and net ionic equations are given below. The spectator ions are sodium and nitrate ions.

Explanation:

The ionic equation is defined as the equation in which all the substances that are strong electrolytes present in an aqueous state and are represented in the form of ions.

The net ionic equation is defined as the equations in which spectator ions are not included.

Spectator ions are the ones that are present equally on the reactant and product sides. They do not participate in the reaction.

The balanced molecular equation for the reaction of lead (II) nitrate and sodium sulfide follows:

\(Pb(NO_3)_2(aq)+Na_2S(aq)\rightarrow PbS(s)+2NaNO_3(s)\)

The ionic equation follows:

\(Pb^{2+}(aq)+2NO_3^-(aq)+2Na^+(aq)+S^{2-}(aq)\rightarrow PbS(s)+2Na^+(aq)+2NO_3^-(aq)\)

As sodium and nitrate ions are present on both sides of the reaction. Thus, they are considered spectator ions.

The net ionic equation follows:

\(Pb^{2+}(aq)+S^{2-}(aq)\rightarrow PbS(s)\)

The claim that can be supported is that the channels in mars are made by the flow of lave and not by water. Thus, claim  2 is supportive.

According to the new studies of the surface features of mars there are some channels found through the plates of mars. At least one of the meandering channels on the surface of Mars can possibly be explained by the fact that flowing lava can create or carve patterns that resemble the riverbeds and canyons cut by water.

NASA delivered this talk on these findings on March 4, 2010, at the 41st Lunar and Planetary Science Conference at NASA's Goddard Space Flight Center in Greenbelt, Maryland.

The possibility of discovering life on Mars is supposed to be affected by the question of whether the channels on Mars were produced by lava or by water.

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The primary distinction between these two negotiation strategies is that distributive negotiation does not take into consideration the demands of the other party when negotiating a settlement.

In a competitive negotiation style known as distributive bargaining, one party only gains when the other party loses.

Positional negotiating involves both sides criticising one other's proposals in an effort to convince the other that theirs is the best. By engaging in interest-based negotiation, both (or all) sides approach the problem and search for a solution that best advances their individual interests.

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Answer:

gravitational potential energy

Explanation:

i just did it

The correct options that apply during a chemical change are:

A) One atom or more changes into atoms of another element.

B) New substances with different properties are formed.

C) Solids, liquids, or gases may form. Option A, B and C

During a chemical change, the arrangement of atoms in molecules is altered, resulting in the formation of new substances with different chemical properties. This is represented by option B. For example, when hydrogen gas (H₂) reacts with oxygen gas (O₂), a chemical change occurs, and water (H₂O) is formed. The properties of water, such as boiling point, density, and chemical reactivity, are distinct from those of its constituent elements.

Additionally, during a chemical change, atoms can rearrange to form molecules of different elements, as indicated in option A. For instance, during a nuclear reaction, such as radioactive decay, the nucleus of an atom can change, leading to the formation of atoms of different elements.

Option C is also correct. Depending on the specific reaction conditions, chemical changes can result in the formation of solids, liquids, or gases. For example, when a metal reacts with an acid, such as zinc with hydrochloric acid, a gas (hydrogen) is produced.

Options D and E are not universally applicable to all chemical changes. While some reactions may release heat energy (exothermic reactions), others may absorb heat energy (endothermic reactions). The requirement for heating or the release of heat depends on the specific reaction and its energy considerations.

In summary, during a chemical change, atoms can change into atoms of another element (A), new substances with different properties are formed (B), and solids, liquids, or gases may form (C).

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The number of electrons for sulfur, selenium, tellurium, and polonium will have in their outer shell is 6,6,6,6 respectively.

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The rate of the given reaction is 0.00197 M/s.

The balanced chemical equation of the reaction is:

CO (g) + NO₂ (g) → CO₂ (g) + NO (g)

From the equation, 1 mole of CO produces 1 mole of CO₂, and hence the number of moles of CO2 produced is equal to the number of moles of CO consumed.

The concentration of CO₂ produced = 0.123 M.

Therefore, the concentration of CO consumed is also 0.123 M.

The rate of reaction is given by the formula:

where Δ[C] is the change in concentration and Δt is the change in time.

Over 62.3 seconds, the concentration of CO decreases from 0 M to 0.123 M.

Δ[C] = 0.123 M - 0 M

Δ[C]  = 0.123 M

Δt = 62.3 s

Substituting the values in the formula, we get:

rate of the reaction = Δ[C]/Δt

rate of the reaction = 0.123 M/62.3 s

rate of the reaction = 0.00197 M/s

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Answer:b

b

Explanation:

Answer:

66 grams of ice would have to melt to lower the temperature of 352 mL of water from 15 °C to 0 °C.

Explanation:

To calculate the amount of ice that would have to melt to lower the temperature of 352 mL of water from 15 °C to 0 °C, we need to use the formula:

Q = m_water * c_water * ΔT_water + m_ice * Lf

where,
Q = the amount of heat transferred,
m_water = the mass of water, c_water is the specific heat capacity of water,
ΔT_water = the change in temperature of water, m_ice = the mass of ice,
Lf = the specific latent heat of fusion of ice.

First, let's calculate the amount of heat transferred to the water:

Q = m_water * c_water * ΔT_water
Q = 352 g * 1.0 cal/(g*°C) * (15-0) °C
Q = 5,280 cal

Next, we can use the specific latent heat of fusion of ice, which is 80 cal/g, to calculate the amount of heat required to melt the ice:

Q = m_ice * Lf
Q = m_ice * 80 cal/g
m_ice = Q / Lf
m_ice = 5,280 cal / 80 cal/g
m_ice = 66 g

The change in internal energy of the system is found to be -8joules.

We know that, work done W by the system is taken as negative. Work done on the system is taken as positive.

Heat absorbed Q by the system is taken as positive and heat released by the system is taken as negative.

It is given,

W = +4J (Work done on the system)

Q = -12j (Head released by the system)

Now, we calculate change in Internal energy ΔE of the system by using first Law of thermodynamics,

It says, total change in internal energy is equal to the sum of work done and heat absorbed,

So, we can write,

ΔΕ = Q + w

Putting the values,

ΔΕ = −12+ 4

ΔΕ = -8J

Hence, change in internal energy of the system is -8joules.

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The number of energy levels in iron atom in its ground state is 4. The valence electrons in iron fills in 4s and 3d orbitals.

Iron is 26th element in periodic table. It is located in d-block and is called a transition metal. Like all other transition metals, Fe also exhibit the variable oxidation states.

The electrons in an atom fills in different energy levels from lower energy level to the higher energy level. Fe contains total 26 electrons out of which 8 are valence electrons.

Among this 8 electrons, 2 are in 4s orbital and 6 are in 3d orbital. The largest occupied energy level is n =4. Therefore, the number of shell in Fe is 4.

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Flame test is a qualitative test which is used to identify the metal and metalloid ion in the sample.

A Flame test is used to identify the metal and metalloid ion in the sample. Flame test is a qualitative test. Not every metal ion emit color when it is heated in the gas burner.

The purpose of flame test is used to find the identities of ions in two solutions of unknown composition by comparing the colors they produce.

Thus from the above conclusion we can say that Flame test is a qualitative test which is used to identify the metal and metalloid ion in the sample.

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Explanation:

3+3+6=12 is the three numbers adding up to 12

Answer: Neils Bohr

Explanation: Development of the Atomic Theory. In 1913, Neils Bohr, a student of Rutherford 's, developed a new model of the atom. He proposed that electrons are arranged in concentric circular orbits around the nucleus. This model is patterned on the solar system and is known as the planetary model.