Pewter is a solidified solution of tin and lead or tin and zinc. In both cases, tin is the main component. Which metal would you classify as the solute in each type of pewter?

A pressure cοοker uses pressure tο bοil water at a lοwer temperature than its nοrmal bοiling pοint.

Thus οptiοn A is cοrrect.

Water bοils at 100°C (212°F) when yοu cοοk in a typical saucepan at atmοspheric pressure (14.7 pοunds per square inch [psi]). A pressure cοοker's inside can experience an additiοnal 15 psi οf pressure, οr almοst 30 psi. Water bοils at 121°C (250°F) at that pressure.

Pressure cοοkers make it simple tο swiftly create dishes that are slοw-cοοked. They are gοοd fοr tenderising less expensive cuts οf meat and efficient in terms οf electricity use.

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Answer:

% = 5.69%

Explanation:

To do this, we need to write the equations taking place here. First, this is a REDOX reaction where the hypoclorite and thiosulfate solution reacts. The balanced equations are:

ClO⁻ + 2I⁻ + 2H⁺ -------> Cl⁻ +  I₂ + H₂O

I₂ + 2S₂O₃²⁻ -----------> 2I⁻ + S₄O₆²⁻

We already have the required volume and concentration of the thiosulfate solution, so we can calculate the moles of thiosulfate. With this moles, we can calculate the moles of hypochlorite, then the mass and finally the %.

The moles of thiosulfate would be:

moles S₂O₃²⁻ = V * M

moles S₂O₃²⁻ = 0.01324 * 0.0732 = 9.69x10⁻⁴ moles

Now according to the above reactions, we can see that

moles I₂ = moles ClO⁻

and

moles I₂ / moles S₂O₃²⁻ = 1/2

Therefore, let's calculate the moles of ClO⁻:

moles ClO⁻ = 9.69x10⁻⁴ / 2 = 4.845x10⁻⁴ moles

Now, we can calculate the mass of these moles, using the molar mass of sodium hypochlorite which is 74.44 g/mol:

m = 74.44 * 4.845x10⁻⁴

m = 0.036 g

Finally the % of this, in the bleach sample would be:

% = 0.036 / 0.634 * 100

Answer:

1. 136 °C.

2. 0.21 atm.

Explanation:

1. Determination of the new temperature in °C.

Initial volume (V1) = 1.35L

Final volume (V2) = 1.95L

Initial temperature (T1) = 283 K

Final temperature (T2) =...?

Using the Charles' law equation, the new temperature of the gas can be obtained as follow:

V1 /T1 = V2 /T2

1.35/283 = 1.95/T2

Cross multiply

1.35 × T2 = 283 × 1.95

1.35 × T2 = 551.85

Divide both side by 1.35

T2 = 551.85/1.35

T2 = 408.8 ≈ 409 K

Finally, we shall convert 409 K to °C. This can be obtained as follow:

T (°C) = T(K) – 273

T(K) = 409 K

T (°C) = 409 – 273

T (°C) = 136 °C

Therefore, the new temperature of the gas is 136 °C.

2. Determination of the new pressure.

Initial pressure (P1) = 1.34 atm

Initial volume (V1) = 267 mL

Final volume (V2) = 1.67 L

Final pressure (P2) =.?

Next, we shall convert 1.67 L to millilitres (mL). This can be obtained as follow:

1 L = 1000 mL

Therefore,

1.67 L = 1.67 L × 1000 mL / 1 L

1.67 L = 1670 mL

Therefore, 1.67 L is equivalent to 1670 mL.

Finally, we shall determine the new pressure of the gas as follow:

Initial pressure (P1) = 1.34 atm

Initial volume (V1) = 267 mL

Final volume (V2) = 1670 mL

Final pressure (P2) =.?

P1V1 = P2V2

1.34 × 267 = P2 × 1670

357.78 = P2 × 1670

Divide both side by 1670.

P2 = 357.78 / 1670

P2 = 0.21 atm.

Therefore, the new pressure of the gas is 0.21 atm.

a. The rate law for this reaction is: Rate = k[Cl] [H₂]. This means that the rate of the reaction is directly proportional to the concentrations of both Cl and H₂ molecules.

Rate law is an equation that describes the rate of a chemical reaction as a function of the concentrations of reactants. The rate law allows us to describe how the rate of a reaction changes when the concentrations of reactants are changed. It is derived from the rate equation, which is a mathematical expression that can be used to calculate the rate of a reaction from the concentrations of the reactants and the rate constant.

b. The rate law for this reaction is: Rate = k[O] [Os]. This means that the rate of the reaction is directly proportional to the concentrations of both O and Os molecules.
c. The rate law for this reaction is: Rate = k[NO₂]₂. This means that the rate of the reaction is directly proportional to the square of the concentration of NO₂ molecules.

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Complete Question:

Answer: 7 g

Explanation: 42/6=7

Answer:

0 for the elemental form, +2 in its compounds.

The enthalpy change of the reaction C(diamond) → C(graphite) is -2.9 kJ.

The given information is ΔHrxn for the reaction C(diamond) → C(graphite) can be calculated with the given equations:Equations:  C(diamond) + O2(g) → CO2(g) ΔH = −395.4 kJ  2 CO2(g) → 2 CO(g) + O2(g) ΔH = 566.0 kJ  C(graphite) + O2(g) → CO2(g) ΔH = −393.5 kJ  2 CO(g) → C(graphite) + CO2(g) ΔH = −172.5 kJThe required reaction can be obtained by adding the equations (1) and (4), as follows:C(diamond) + O2(g) + 2CO(g) → C(graphite) + 3CO2(g)Addition of the two equations (1) and (4) results in a reaction whose products are C(graphite) and CO2.

To get the final equation that involves only the required reactants and products, the equation (2) should be added, which consumes CO2 and produces O2, as shown below:C(diamond) + O2(g) → CO2(g)  ΔH = −395.4 kJ [eq. (1)]  2 CO(g) → C(graphite) + CO2(g)  ΔH = −172.5 kJ [eq. (4)]  2 CO2(g) → 2 CO(g) + O2(g)  ΔH = 566.0 kJ [eq. (2)]  C(diamond) + O2(g) + 2CO(g) → C(graphite) + 3CO2(g)  ΔHrxn=ΣΔHf(products)−ΣΔHf(reactants)  ΔHrxn=[(3 mol CO2)(-393.5 kJ/mol) + (1 mol C(graphite))(0 kJ/mol)] − [(1 mol C(diamond))(0 kJ/mol) + (1 mol O2)(0 kJ/mol) + (2 mol CO(g))(−172.5 kJ/mol)] − [(2 mol CO2)(566.0 kJ/mol)]  ΔHrxn=−2.9 kJ.

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1a. The volume (in cm³) of the block is 1042.734 cm³

1b. The volume (in L) of the block is 1.04 L

1c. The density (in g/mL) of the block is 0.907 g/mL

1d. The block will not sink

The volume of the block in cm³ can be obtained as follow:

Volume of block = dimension

Volume of block = 11.1 cm × 154 mm × 0.061 m

Volume of block = 11.1 cm × (154 / 10) cm × (0.061 × 100) m

Volume of block = 11.1 cm × 15.4 cm × 6.1 cm

Volume of block (in cm³) = 1042.734 cm³

The volume of the block in L can be obtained as follow:

1000 cm³ = 1 L

Therefore,

1042.734 cm³ = (1042.734 cm³ × 1 L) / 1000 cm³

1042.734 cm³ = 1.04 L

Thus, we can say that the volume of block (in L) is 1.04 L

We can obtain the density in g/mL as shown below:

Density = mass / volume

Density of block = 9.46×10² / 1042.734

Density of block = 0.907 g/mL

First, we shall determine the density of the liquid. Details below:

Density = mass / volume

Density of liquid = 724.11 / 780

Density of liquid = 0.928 g/mL

Now, we shall compare the density of the block and liquid to detect whether or not the block will sink. Details below:

Since the density of the block is smaller than that of the liquid, the block will not sink in the liquid.

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Answer:

\(M=0.0513M\)

Explanation:

Hello!

In this case, since the molarity of a solution is computed by dividing the moles of solute by the volume of solution, we notice we first need the moles of KHP as shown below:

\(n=0.5237g*\frac{1mol}{204.22 g} =0.00256mol\)

Next, the volume in liters:

\(V=50.0mL*\frac{1L}{1000mL}\\\\V=0.0500L\)

Thus, the molarity turns out to be:

\(M=\frac{n}{V}\\\\M=\frac{0.00256mol}{0.05000L} \\\\M=0.0513M\)

Best regards!

The values of X and Y in the diagram represent the progress of the reaction along the x-axis and the potential energy along the y-axis, respectively.

To determine whether the student's sketch of the potential energy diagram for an exothermic reaction is correct or incorrect, we need to understand the characteristics of such a reaction. In an exothermic reaction, the reactants have a higher energy level than the products, and energy is released during the reaction.The potential energy diagram should have the reactants positioned at a higher energy level (y-axis) than the products. As the reaction progresses from reactants to products, the potential energy should decrease, indicating the release of energy. This decrease in energy should be evident in the form of a downward slope or a curve.If the student's sketch accurately depicts these characteristics, with the reactants at a higher energy level than the products and a downward slope or curve indicating energy release, then the diagram is correct. However, if the student's sketch shows the reactants at a lower energy level or depicts an upward slope, it would be incorrect.The x-axis typically represents the reaction coordinate, which can be the extent of the reaction or the progression of time.

The y-axis represents the potential energy, which can be measured in joules or any other energy unit. The specific values on the axes will depend on the reaction and the units chosen.

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Hydrogen peroxide can be prepared by the reaction of barium peroxide with sulfuric acid, so, 13.26 ml of 4.75 M H₂SO₄ (aq) are needed to react completely with 16.1 g BaO₂ (s).

In the reaction, there is 1 mole of BaO₂(s) that reacts with 1 mole of H₂SO₄(aq), so the moles of BaO₂ are 0.063 moles because the mass of this is 16.1 and the molar mass is 253.34 g/mol. So here, the same mole that is 0.063 is for H₂SO₄, and the volume of H₂SO₄ is 13.26 ml, which is gotten from the moles of solute/molarity that are 0.063 moles/ 4.75 M.

Hence, hydrogen  peroxide can be prepared by the reaction of barium peroxide with sulfuric acid, so, 13.26 ml of 4.75 M H₂SO₄ (aq) are needed to react completely with 16.1 g BaO₂ (s).

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Based on the given data, the amount of products from 5.00 g of KClO₃ is:

The decomposition of KClO₃ is given by the equation below:

2 KClO₃  -----> 2 KCl + 3 O₂

2 moles of KClO₃ produces 2 moles of KCl and 3 moles of O₂

Molar mass of KClO₃ is 122.5 g/mol

molar mass of KCl = 74.5 g

molar mass of O₂ = 32 g

Moles of KClO₃ in 5.00 g = 5.00/122.5

For KCl

a. moles: 0.04 moles of KClO₃ will produce 0.04 moles of KCl

b. mass of KCl = 0.04 * 74.5 = 2.98 g KCl

c. number of molecules of KCl = 0.04 * 6.02 * 10²³ = 2.41 * 10²² molecules of KCl

For O₂:

a. moles of O₂; 0.04 moles of KClO₃ will produce = 0.06 moles of O₂.

b. mass of O₂ = 0.06 * 32 g = 1.92 g of O₂

c. number of molecules: 0.06 * 6.02 * 10²³ = 3.61 * 10²² molecules of O₂

Therefore, the amount of products from 5.00 g of KClO₃ is:

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The resulting solution will be neutral having a pH of 7.

The term pH is defined as the hydrogen ion concentration in solution. We know that the pH is inversely related to the hydrogen ion concentration in solution.

We know that the reaction between an acid and a base produced a salt. In this case, the salt that is produced is neutral because the acid is completely reacted with the base.

Since the solution contains a mixture of a  containing pH of 3.5 and that of a pH of 10.5, the resulting solution will be neutral having a pH of 7.

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The calculated formula masses to 133.5 amu, we find that the substance with a formula mass closest to 133.5 amu is (d) AlCl3. Therefore, the answer is option D.

To identify the substance with a formula mass of 133.5 amu, we need to calculate the formula mass of each given substance and compare it to 133.5 amu.

(a) MgCl2:

The formula mass of MgCl2 can be calculated by adding the atomic masses of magnesium (Mg) and chlorine (Cl).

Mg: atomic mass = 24.31 amu

Cl: atomic mass = 35.45 amu

Formula mass of MgCl2 = (24.31 amu) + 2(35.45 amu) = 95.21 amu

(b) SCl:

The formula mass of SCl can be calculated by adding the atomic masses of sulfur (S) and chlorine (Cl).

S: atomic mass = 32.07 amu

Cl: atomic mass = 35.45 amu

Formula mass of SCl = 32.07 amu + 35.45 amu = 67.52 amu

(c) BCl:

The formula mass of BCl can be calculated by adding the atomic mass of boron (B) and chlorine (Cl).

B: atomic mass = 10.81 amu

Cl: atomic mass = 35.45 amu

Formula mass of BCl = 10.81 amu + 35.45 amu = 46.26 amu

(d) AlCl3:

The formula mass of AlCl3 can be calculated by adding the atomic mass of aluminum (Al) and 3 times the atomic mass of chlorine (Cl).

Al: atomic mass = 26.98 amu

Cl: atomic mass = 35.45 amu

Formula mass of AlCl3 = 26.98 amu + 3(35.45 amu) = 133.78 amu. Option D

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The SI unit to the quantity it measures are:

Mass: The mass of an object is a measure of its amount of matter. The SI unit of mass is the kilogram (kg) or gram (g).

Temperature: Temperature is a measure of the average kinetic energy of the particles in a substance. The SI unit of temperature is the kelvin (K).

Time: Time is a measure of the interval between two events. The SI unit of time is the second (s).

Electric current: Electric current is a measure of the flow of electric charge. The SI unit of electric current is the ampere (A).

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Complete question:

Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.

Match each SI unit to the quantity it measures.

Answer:

50.127 J

Explanation:

The following data were obtained from the question:

Initial temperature (T₁) = –5 °C

Final temperature (T₂) = 37 °C

Mass (M) = 3.10 g

Specific heat capacity (C) = 0.385 J/gºC

Heat (Q) absorbed =?

Next, we shall determine the change in temperature. This can be obtained as follow:

Initial temperature (T₁) = –5 °C

Final temperature (T₂) = 37 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 37 – (–5)

ΔT = 37 + 5

ΔT = 42 °C

Finally, we shall determine the heat absorbed. This can be obtained as follow:

Mass (M) = 3.10 g

Specific heat capacity (C) = 0.385 J/gºC

Change in temperature (ΔT) = 42 °C

Heat (Q) absorbed =?

Q = MCΔT

Q = 3.10 × 0.385 × 42

Q = 50.127 J

Thus, the heat absorbed is 50.127 J.

Answer:

Explanation:

average kinetic energy of a gas molecule really only depends on the temperature, so which ever container is at the highest temperature is the answer

In comparison to other fundamental states of matter, plasma has the highest kinetic energy. This is due to the fact that particles in a plasma travel more quickly than those in a corresponding solid, liquid, or gas.

The energy that an object has as a result of motion is known as kinetic energy. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The body holds onto the kinetic energy it acquired during its acceleration until its speed changes.

The reason why molecules in gases have the largest kinetic energy is because they have more space between one another, experience less intermolecular force, and travel at a faster rate, which results in higher energy.

The temperature has a direct impact on the average kinetic energy of the particles inside a container.

Thus, In comparison to other fundamental states of matter, plasma has the highest kinetic energy.

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The United States experienced a decrease in the real GDP, high inflation, and arising unemployment rate.

The United States appeared to be entering a recession.A recession is a decline in economic activity, characterized by declining GDP, high unemployment rates, and increased unemployment benefits. Economic analysts and the media commonly use a two-quarter consecutive decline in real GDP as a definition of a recession.

The United States is considered to have entered a recession in the 1970s, which was characterized by an energy crisis, inflation, and recession. However, by the end of the decade, the economy had improved, and it entered into the 1980s with a strong economic performance.

The 1970s were a period of high inflation, low growth, and an oil crisis, which had a significant impact on the United States economy. Therefore, it can be concluded that The United States was in the middle of an economic boom before the 1970s recession and entered a recession in the 1970s due to a decrease in the real GDP, high inflation, and arising unemployment rate.

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Answer:

Positron emission

Explanation:

Positron emission involves the conversion of a proton to a neutron. This process increases the mass number of the daughter nucleus by 1 while its atomic number remains the same. The new neutron increases the number of neutrons present in the daughter nucleus hence the process increases the N/P ratio.

A positron is usually ejected in the process together with an anti-neutrino to balance the spins.

Gamma rays are high-energy electromagnetic waves given off during nuclear decay; option A.

Electromagnetic waves are waves which are produced as a result of the interaction of the magnetic and electric fields.

Types of electromagnetic waves include gamma rays, radio waves, ultraviolet waves.

Gamma rays are high-energy electromagnetic waves given off during nuclear decay

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Answer:

d

Combustion

Explanation:

The name of  \(CoCl_{2}\) is Cobaltous Chloride ,  \(CrBr_{3}\) is  Chromic Bromide ,  PbO is Plumbous oxide , \(SnO_{2}\) is Stannous oxide , \(Fe_{2} O_{3}\)  is Ferric oxide and \(FeCl_{3}\) is  Ferric Chloride.

Ionic compounds are made up of ions. The positively charged species are referred to as cations and negatively charged species are referred to as anions. Ionic compounds are named based on the nomenclature of ionic compounds.

For \(CoCl_{2}\) , the cation is \(Co^{2+}\) which is called cobaltous ion. The anion is \(Cl^{-}\) which is the Chloride ion. So, the name of the compound is Cobaltous Chloride.

For \(CrBr_{3}\) , the cation is \(Cr^{3+}\) which is called chromic ion. The anion is \(Br^{-}\)which is the bromide ion. So, the name of the compound is Chromic Bromide.

For PbO , the cation is \(Pb^{2+}\) which is called Plumbous ion. The anion is \(O^{2-}\) which is the oxide ion. So, the name of the compound is Plumbous oxide(Lead Oxide).

For \(SnO_{2}\) , the cation is \(Sn^{2+}\) which is called stannous. The anion is \(O^{2-}\)which is the oxide ion. So, the name of the compound is Stannous oxide.

For \(Fe_{2} O_{3}\) , the cation is \(Fe^{3+}\)  which is called Ferric ion. The anion is \(O^{2-}\) which is the oxide ion. So, the name of the compound is Ferric oxide.

For \(FeCl_{3}\) , the cation is  \(Fe^{3+}\)  which is called Ferric ion. The anion  is \(Cl^{-}\) which is the Chloride ion. So, the name of the compound is Ferric Chloride.

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The connection between increasing carbon dioxide and increasing temperature is: carbon dioxide absorbs heat from the sun and traps it in earth's atmosphere. Since the heat cannot escape, it causes the earth's temperature to increase which is the first option.

When carbon dioxide (CO₂) and other greenhouse gases are present in the atmosphere, they act as a natural blanket, allowing sunlight (solar radiation) to pass through and reach the Earth's surface. Some of this solar radiation is absorbed by the Earth's surface, while the rest is reflected back towards space as heat (infrared radiation). However, greenhouse gases like carbon dioxide have the property of absorbing and re-emitting infrared radiation.

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205.7 cm^3 (or 0.2057 L) of the concentrated tetraoxosulphate (VI) acid to prepare 8 dm^3 of a 0.5 mol/dm^3 solution of the compound.

To prepare 8 dm^3 of a 0.5 mol/dm^3 solution of tetraoxosulphate (VI) acid from a stock solution, you need to use:

(0.5 mol/dm^3) x (8 dm^3) x (98 g/mol) = 392 g of tetraoxosulphate (VI) acid

Since the acid is 97% pure, we know that:

(97/100) x (392 g) = 379.84 g of tetraoxosulphate (VI) acid is pure acid

We can use the specific gravity of the acid, which is 1.84 g/cm^3, to calculate the volume of the acid needed:

379.84 g / (1.84 g/cm^3) = 205.7 cm^3 of tetraoxosulphate (VI) acid

So, you would need to use 205.7 cm^3 (or 0.2057 L) of the concentrated tetraoxosulphate (VI) acid to prepare 8 dm^3 of a 0.5 mol/dm^3 solution of the compound.

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The partial charges on each fluorine atom are negative. Option B) The central O atom is the correct answer. Option B

The partial charges in a molecule are determined by the electronegativity values of the atoms involved. Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. In the case of \(F_2O\), fluorine (F) is more electronegative than oxygen.

Fluorine is the most electronegative element on the periodic table, meaning it has a high ability to attract electrons. Oxygen is also relatively electronegative but less so than fluorine. When fluorine atoms bond with oxygen, the shared electrons will be pulled more towards the fluorine atoms, creating a polar covalent bond.

In \(F_2O\), each fluorine atom will pull the shared electrons towards itself, resulting in a higher electron density around the fluorine atoms. This creates a region of partial negative charge around the fluorine atoms.

Conversely, the oxygen atom will have a region of lower electron density and, therefore, a partial positive charge. This is because the shared electrons spend more time around the fluorine atoms due to their higher electronegativity.

Option B

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Answer:

Br₂(l) + ΔV → Br₂(g)

Explanation:

When a chemical or phase change occurs during a chemical process some heat is absorbed or released. For the process of vaporization of a substance, the heat (Usually required) is ΔV (How many energy is required for the process occurs).

In the vaporization of Br2 there are required 7.4kcal/mol, Δv. The reaction is:

Answer:

they are not liquids at room temperature, so your answer is the last one

Explanation:

Answer:

Protein Power

Much of a cell's efforts go toward making proteins. Proteins carry out many important functions in the body. ... Cell organelles must work together to carry out protein synthesis, utilize proteins within the cell, and transport them out of the cell.

Answer: B) 0.005 55 cm

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