Swag? Swag? Swag? Swag? Swag?

Answer:

Although you might think of a machine as complex system of gears, drive belts and and a motor, the definition physicists use is much simpler. A machine is simply a device that does work, and there are only six different types of simple machines. They include the lever, the pulley, the wheel and axle, the screw, the wedge and the inclined plane.

Explanation:

The balanced equation of the redox reaction is given as follows:

The balanced equation of the reaction is determined using the half-reaction method.

The given equation of the redox reaction is:

H₆TeO₆ + Br₂ ----> TeO₂ + BrO₃⁻

Reduction half-reaction:

H₆TeO₆ → TeO₂

The oxidation state of Te changes from +6 to +4, showing that it has lost gained electrons.

H₆TeO₆ → TeO₂ + 2e⁻

Oxidation half-reaction:

Br₂ → BrO₃⁻

The oxidation state of Br changes from 0 to +5, showing that it has lost five electrons.

Balancing the electrons transferred and the atoms by adding electrons, H₂O, and H⁺ to the appropriate sides:

Br₂ + 6 H₂O → 2 BrO₃⁻ + 12 H⁺ + 10 e⁻

The number of electrons transferred in both half-reactions balanced is  by multiplying the oxidation half-reaction by 5 and the reduction half-reaction by 2:

5 (H₆TeO₆ → TeO₂ + 2 e⁻) → 5 H₆TeO₆ → 5 TeO₂ + 10 e⁻

2 * (Br₂ + 6H₂O → 2 BrO₃⁻ + 12 H⁺ + 10e⁻) → 2 Br₂ + 12 H₂O → 4 BrO₃⁻ + 24 H⁺ + 20 e⁻

The two half-reactions are added together and the electrons are canceled out to obtain the balanced redox reaction:

5 H₆TeO₆ + 2 Br₂ + 12 H₂O → 5 TeO₂ + 4 BrO₃⁻ + 24 H⁺

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Answer:

2NaNO3 ->  2NaNO2 +  O2

Explanation:

Answer:

2NaNO3 → 2NaNO2 + O2

Answer:

A. They must be kept separate from moisture and oxygen

Explanation:

Alkali metals refers to a group of chemical elements in the periodic table. It is the common name given to Group 1 elements (excluding hydrogen). They are generally metallic in nature with physical properties like shining lustre, silvery in appearance etc. Alkali metals include lithium, Pottasium, Sodium, Rubidium etc.

One important chemical property of alkali metals is their high reactivity i.e. they tend to react quickly with other substances. For example, alkali metals react vigorously with water to form hydroxides. They also react with oxygen to form oxides. Due to this highly reactive properties, they are kept or stored away from moisture (water) and oxygen (present in air).

852 grams of chromium carbonate needs to be measured out to produce 3 moles of chromium carbonate.

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Answer:

a. 67

Explanation:

3mol O2 = 2mol O3

1mol O2 = 2/3 mol O3

100g = 2/3 × 100 = 67

The final temperature if you mixed a 1,000 grams of 20 degree Celsius water with 2,000 grams of 40 degree Celsius water is 33.3 degree Celsius.

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.

It is given by the formula -

                                                  Q = mcΔT

where, Q = amount of heat

m = mass

c = specific heat

ΔT = Change in temperature

Given,

On mixing the water at two different temperatures-

Q(gained) = Q (lost)

mcΔT = mcΔT

2000 × 4.184 × ( 40 - x ) = 1000 × 4.184 × ( x - 20)

x = 33.3⁰C

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Answer:

true

Explanation:

because heat tempeture wise it can cool down

We know that air is not a single substance because it is a mixture of several gases such as nitrogen, oxygen, carbon dioxide, and other trace gases.

Each gas in air has its own unique physical and chemical properties, and can be separated from the mixture using various techniques like distillation, adsorption, and membrane separation.

Metals have many similar properties, such as being good conductors of electricity and heat, having high melting and boiling points, and being ductile and malleable. Grouping metals is useful because it allows us to make generalizations about their properties and behavior, and to predict how they will react with other elements and compounds.

The Periodic Table is structured as a table rather than a list of elements because it allows us to see the relationships between elements more clearly. Elements in the same row, or period, have the same number of electron shells, while elements in the same column, or group, have similar valence electron configurations and therefore similar chemical properties. The periodic nature of these relationships is easier to visualize and understand when the elements are arranged in a table.

The Periodic Table is important for all of science because it provides a framework for understanding the properties and behavior of elements, and for predicting the properties of unknown elements. It is used in many fields beyond chemistry, such as physics, biology, geology, and materials science.

The Periodic Table could be arranged differently, and there have been many alternative arrangements proposed over the years. One alternative is the spiral periodic table, which arranges the elements in a spiral shape according to their electron configurations. Another alternative is the 3D periodic table, which arranges the elements in a cube or sphere based on their atomic properties. However, the traditional table format has proven to be the most useful and intuitive for most applications, and is therefore the one most commonly used.

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Answer:

It takes 0.27 second to travel the distance of  100 yard

Explanation:

We can use the formula ( t = d / s )t = d / s  = 91 m / 333 m/s  = 0.27 s

Answer:

80.2L

Explanation:

Given parameters:

Initial volume of oxygen = 47.2L

Initial pressure of oxygen = 1240torr

Final pressure  = 730torr

Unknown:

Final volume  = ?

Solution:

To solve this problem, we apply the Boyle's law proposed by Robert Boyle. It states that "the volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant".

Mathematically;

             P₁V₁ = P₂V₂

P and V are pressure and volume

1 and 2 are initial and final states

              1240 x 47.2  = 730 x V₂  

                  V₂  = 80.2L

If the MDS (Minimum Data Set) is successfully implemented, several positive outcomes can be expected. The MDS is a standardized assessment tool used in healthcare settings to evaluate the physical, mental, and psychosocial well-being of patients.

Its successful implementation can lead to improved patient care, more efficient resource allocation, and enhanced data analysis.With the MDS in place, healthcare providers can gather consistent and comprehensive data about patients, enabling better understanding of their needs and tailoring of individualized care plans.

This can result in improved treatment outcomes and patient satisfaction. Additionally, the MDS facilitates effective communication and information sharing among healthcare professionals, leading to coordinated care and reduced errors.From a broader perspective, successful implementation of the MDS allows for accurate and reliable data collection, enabling robust research and evidence-based decision-making.

This can contribute to advancements in healthcare practices, policy development, and quality improvement initiatives. Ultimately, the successful implementation of the MDS can enhance patient outcomes, improve healthcare delivery, and drive positive changes in the healthcare system as a whole.

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we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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1.)D

2.)B

3.)A

4.)C

5.)C

Answer:

see the image below

Explanation:

oxidation is losing of electrons

reduction is gaining of electrons

Answer: Explanation:

Sodium Phosphide has a formula of Na3P . In order to bond ionically the charges must be equal and opposite. It will take one -3 phosphide ion to balance three +1 sodium ions forming a magnesium phosphide molecule of Na3P . I hope this was helpful.

Answer:

A. Memory reconstruction

6.02 x \(10^{20\) formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

To convert formula units of MgCl₂ to moles of MgCl₂, we need to use Avogadro's number, which relates the number of formula units to the number of moles.

Avogadro's number (NA) is approximately 6.022 x 10^23 formula units per mole.

Given that we have 6.02 x 10^20 formula units of MgCl₂, we can set up a conversion factor to convert to moles:

(6.02 x 10^20 formula units MgCl₂) * (1 mol MgCl₂ / (6.022 x 10^23 formula units MgCl₂))

The formula units of MgCl₂ cancel out, and we are left with moles of MgCl₂:

(6.02 x 10^20) * (1 mol / 6.022 x 10^23) = 0.1 mol

Therefore, 6.02 x 10^20 formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

It's important to note that this conversion assumes that each formula unit of MgCl₂ represents one mole of MgCl₂. This is based on the stoichiometry of the compound, where there is one mole of MgCl₂ for every one formula unit.

Additionally, this conversion is valid for any substance, not just MgCl₂, as long as you know the value of Avogadro's number and the number of formula units or particles you have.

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the volume of the gas is quadrupled.

Explanation:

Water is a tiny molecule.

it consists of three atoms : two of hydrogen and one of oxygen. Water molecules cling to each other because of a force called hydrogen bonding.

Answer:

12.937 mL

Explanation:

First, we have to start with the hendersson-hasselbach equation:

\(pH=pKa+\frac{A^-}{HA}\)(Equation 1)

So, from this equation, we already know the desired pH value 9.3. Therefore we have to calculate the pKa value, for this, we need to use the following equations:

\(pKb=-LogKb\) (equation 2) and \(14=pKa+pKb\) (equation 3) With this in mind we can do the calculations:

\(pKb=-Log(1.8x10^-^5)=4.74\)

\(pKa=14-4.74=9.26\)

Additionally, we have to know the buffer system reaction:

\(NH_4^+~<=>~NH_3~+~H^+\) (reaction 1)

With this in mind \(NH_4^-=HA\) and \(NH_3=A^-\). Now if we use the hendersson-hasselbach reaction we can find the ratio (\(\frac{A^-}{HA}\)) that we need for the desired pH value, so:

\(9.30=9.26+Log(\frac{A^}{HA})\)

\(\frac{A^-}{HA}=1.108\) (equation 4)

From the problem, we know that we already have a portion of \(NH_3=A^-\), 30 mL and 0.1 M. Also, the HCl that we are going to add will react with the NH3 (\(H^+=HCl\)), so:

\(H^+~+~NH_3=>~NH_4^+\) (reaction 2)

With this in mind, all the HA concentration will come from the addition of the HCl and this addition will consume some A-. Therefore, we have to know the moles of A- before the addition:

\(moles~of~A^-~=~0.03*0.1=0.003~mol~of~A-\)

So, we can write a new equation that calculates the concentration of \(A^-\) before the addition:

\(A^-=\frac{0.003-X}{0.03+Y}\) (equation 5)

In this case, "X" is the of A- (NH3) consumed in the reaction for the addition of HCl and Y is the volume of HCl (in litters). Additionally, we can write another equation for the concentration of HA after the addition of HCl:

\(HA=\frac{X}{Y+0.03}\) (equation 6)

Let's remember that we already have 0.03L (30mL) on the beaker, thats why we have to add "0.03" in the bottom. Now, we can include these last two equations on equation 4, so:

\(\frac{\frac{0.003-X}{0.03+Y}}{\frac{X}{Y+0.03}}=1.108\)(equation 7)

We have 2 unknows and 1 equation we need another equation to solve this. So, all X would be produced by the addition of HCl therefore "X" are the moles of HCl added and Y would be the volume of HCl, if we have a concentration of 0.11M for HCl we can use the molarity equation to relate "X" and "Y", so:

\(0.11M=\frac{X}{Y}\) (equation 8)

\(X=0.11*Y\) (equation 9)

Now, we can replace equation 9 in equation 7, so:

\(\frac{\frac{0.003-0.11*Y}{0.03+Y}}{\frac{0.11*Y}{Y+0.03}}=1.108\) (equation 10).

If we do some math we will obtain:

\(\frac{0.003-0.11*Y}{0.11*Y}=1.108\) (equation 11)

When we solve for "Y" we obtain a value of 0.012937 L or 12.937 mL.

I hope it helps!

To determine the temperature of the air inside the tire when the pressure increases to 87.3 kPa, we can use the ideal gas law equation:

PV = nRT

Where:

P = pressure

V = volume

n = number of moles

R = gas constant

T = temperature

Assuming the volume of the tire remains constant, we can rearrange the equation as follows:

P₁/T₁ = P₂/T₂

Where:

P₁ = initial pressure (82.0 kPa)

T₁ = initial temperature (26.0 °C + 273.15 K) [converting Celsius to Kelvin]

P₂ = final pressure (87.3 kPa)

T₂ = final temperature (unknown)

Substituting the values into the equation:

82.0 kPa / (26.0 °C + 273.15 K) = 87.3 kPa / T₂

Now, let's solve for T₂:

T₂ = (87.3 kPa * (26.0 °C + 273.15 K)) / 82.0 kPa

Calculating the expression:

T₂ ≈ 299.19 K

To convert this temperature back to Celsius:

T₂ ≈ 299.19 K - 273.15 ≈ 26.04 °C

Therefore, the temperature of the air inside the tire, when the pressure increases to 87.3 kPa, is approximately 26.04 °C.

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The molar mass of phenyl alanine is 165 g/mol and the mas of the phenyl alanine is 211.2 g /mol

We know that the statement in the question has told that from the reaction equation. It is one mole of the aspartame that is required to be able to obtain one mole of the phenylamine.

Now we know that the number of moles of the aspartame that is required can be obtained by the use of;

Number of moles =  mass/molar mass

=  378g/294.3 g/mol

= 1.28 moles

Molar mass of phenylalanine = 9(12) + 11(1) + 14 + 2(16)

=108 + 11 + 14 + 32

= 165 g/mol

Hence mass of the phenylamine = 1.28 moles * 165 g/mol

= 211.2g

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Answer:

Empirical formula of a compound means that it provides simplest ratio of whole number.

Explanation:

Mass of boron and chlorine is 9.224% and 90.74%

A muffi n recipe calls for cream of tartar, or potassium hydrogen tartrate. The amount of cream of tartar that is required contains 2.56 ×10²³atoms of carbon. 0.42moles of potassium hydrogen tartrate is required

In the Global System of Units (SI), the mole represents the unit of material quantity. How many fundamental entities of a particular substance are present within an object a sample is determined by the quantity of that material. An elementary entity can be a single atom, a molecular structure, an ion, a charged particle pair, or a particle that is subatomic like a proton depending on the makeup of the substance.

For instance, despite the fact that the two substances have different volumes and masses, 10 moles of water because 10 moles of the chemical element mercury both contain the same quantity of stuff, because the mercury comprises exactly one particle for each molecule of water.

mole = 2.56 ×10²³/ 6.022×10²³

       = 0.42moles

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Answer:

3.1g/mL

Explanation:

density = mass/volume

= 43.3/ 13.8

= 3.1g/mL

Answer:

In this reaction, Ca(OH)2 is a reducing agent. It reacts with hydrogen chloride to form calcium chloride and water. Therefore, the following reaction shows that matter is neither created nor destroyed in a chemical reaction: Ca(OH)2 + 2HCI -> CaCl2 + 2H20. The formation of calcium chloride and water from the hydrolysis of calcium hydroxide is not an example of matter being created or destroyed in a chemical reaction because it does not involve the breaking down of any bonds between atoms.

Explanation:

Based on the heat change or heat absorbed by the ethanol, the temperature change is 8.6 °C.

Phase transition refers to the process where a substance changes from one phase or physical state to another when heat is added or removed from it

No change in temperature occurs in a phase transition.

The heat absorbed by the ethanol is calculated thus:

Hence, temperature change = heat change / moles * molar heat capacity

moles of ethanol = 310 * 0.789 / 46

moles of ethanol = 5.317 moles

Heat change = 5.00 kJ or 5000 J

temperature change = 5000 / (5.317 *  109.5)

temperature change = 8.6 °C

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Answer:

Option D. 4

Explanation:

The oxidation number of nitrogen (N) in NO₂ can be obtained as follow:

Oxidation number of O = –2

Oxidation number of N =?

N + 2O = 0

N + 2(–2) = 0

N – 4 = 0

Collect like terms

N = 0 + 4

N = +4

Thus, the oxidation number of nitrogen (N) in NO₂ is +4

Answer:

La ley de los gases ideales relaciona cuatro propiedades macroscópicas de los gases ideales (presión, volumen, número de moles y temperatura). Si conocemos los valores de tres de estas propiedades, podemos utilizar la ley de los gases ideales para conocer la cuarta. En este video, usaremos la ley de los gases ideales para resolver el número de moles (y en última instancia de moléculas) en una muestra de un gas

Explanation: