A 35. 3 g of element m is reacted with nitrogen to produce 43. 5 g of compound m3n2. what is (i) the molar mass of the element and (ii) name of the element?

Press 2+5bUiR1(: r)p to change a complex number into polar form. Use the r theta command or enter the angle in polar form to convert any complex number's polar form.

Most scientific calculators have a function to convert a complex number from rectangular form (a + bi) to polar form (r cis θ). Here's how to do it:

1) Enter the complex number in rectangular form into your calculator using the "a + bi" format.

2) Press the "mode" or "setup" button on your calculator and select "polar" or "cis" mode.

3) Press the "convert" or "pol" button on your calculator to convert the complex number to polar form. The result will be displayed in the format "r cis θ".

4) If your calculator displays the polar form in radians, you may need to convert it to degrees if you need it in degrees. To do this, multiply the angle in radians by 180/π.

Alternatively, you can manually convert a complex number from rectangular to polar form using the following formulas:

r = √(a² + b²)

θ = atan(b/a)

where a is the real part and b is the imaginary part of the complex number. The angle θ is measured in radians, and atan() is the inverse tangent function.

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The statement "the reaction between R and P appeared to stop when no further changes were observed" suggests that the observable changes in the reaction have ceased. However, chemical reactions may not actually "stop" completely even when no further changes are visibly observed.

Chemical reactions occur at the molecular level, where individual molecules collide and undergo chemical transformations. Even if the macroscopic changes or observable properties appear to have reached a steady state, the molecular-level reactions can continue at an equilibrium. In other words, while the overall concentrations or properties of the reactants and products may remain constant, the individual molecules are still undergoing constant microscopic fluctuations and interconversions.

In such cases, the reaction is considered to be in a dynamic equilibrium, where the forward and reverse reactions occur at equal rates, resulting in no net change in the macroscopic observable properties. This state of equilibrium does not imply that the reaction has completely stopped but rather that the rates of the forward and reverse reactions have balanced out.

Therefore, even when no further changes are observed at the macroscopic level, chemical reactions can continue at the molecular level in a dynamic equilibrium state.

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Temperature and pH can potentially affect the speed of Alka-Seltzer dissolving, with higher temperatures and lower pH levels likely increasing the dissolution rate. Salinity, on the other hand, generally has minimal impact.

The speed of Alka-Seltzer dissolving can be affected by temperature, pH, and salinity. Here's a brief explanation of their potential effects:

1. Temperature: Increasing the temperature typically enhances the rate of dissolution. Higher temperatures provide more thermal energy, leading to faster molecular movement and collisions, thereby increasing the dissolution rate of Alka-Seltzer.

2. pH: Alka-Seltzer contains citric acid and sodium bicarbonate, which react to produce carbon dioxide gas. pH can influence the rate of this chemical reaction. Lower pH levels (more acidic conditions) may accelerate the reaction, resulting in faster dissolution. However, extreme pH levels, particularly highly acidic or highly alkaline conditions, might have an adverse effect on the dissolution process.

3. Salinity: Salinity refers to the salt content in the surrounding solution. Salinity generally does not have a significant impact on the dissolution of Alka-Seltzer tablets. As long as the water used for dissolving Alka-Seltzer is not excessively saline, the presence of salts should not noticeably affect the dissolution rate.

It's important to note that these factors may interact with each other, and the specific composition and formulation of Alka-Seltzer can also influence the dissolution behavior. Experimental testing under different conditions would provide more accurate and detailed insights into how temperature, pH, and salinity affect the speed of Alka-Seltzer dissolving.

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Answer:

To determine the limiting reactant and the excess reactant, we need to compare the stoichiometry of the reaction with the amounts of each reactant given.

The balanced chemical equation is:

3 MgCl2 + 2 Na3PO4 -> 6 NaCl + Mg3(PO4)2

Given:

Moles of MgCl2 = 0.75 mol

Moles of Na3PO4 = 0.65 mol

a) To verify the limiting reactant, we need to calculate the moles of Na3PO4 and MgCl2 needed to react completely, based on the stoichiometry of the balanced equation.

From the equation, we can see that:

For every 3 moles of MgCl2, 2 moles of Na3PO4 are required.

Therefore, the moles of Na3PO4 required to react with 0.75 mol of MgCl2 would be:

(0.75 mol MgCl2) x (2 mol Na3PO4 / 3 mol MgCl2) = 0.5 mol Na3PO4

Since we have 0.65 mol of Na3PO4, which is greater than the required amount of 0.5 mol, Na3PO4 is the excess reactant.

b) To find the moles of the excess reactant left over, we subtract the moles of Na3PO4 that reacted from the initial moles:

0.65 mol Na3PO4 - 0.5 mol Na3PO4 = 0.15 mol Na3PO4 (left over)

c) To determine the moles of NaCl produced in the reaction, we need to calculate the moles of the limiting reactant (MgCl2) that reacted. From the balanced equation, we know that:

For every 3 moles of MgCl2, 6 moles of NaCl are produced.

Using the stoichiometry, we can calculate the moles of NaCl produced:

(0.75 mol MgCl2) x (6 mol NaCl / 3 mol MgCl2) = 1.5 mol NaCl

Therefore, 1.5 mol of NaCl will be produced in this reaction.

Answer:

Chemical Changes are also called Chemical Reactions. Chemical reactions involve combining different substances. The chemical reaction produces a new substance with new and different physical and chemical properties. Matter is never destroyed or created in chemical reactions.

Explanation:

Answer:

the answer I think is 76.5L

Answer:

300cm³

Explanation:

volume=l×b×h

4cm×15cm×5cm

=300cm³

The fact that radon is a gas and can enter basements through any cracks makes it a potential health risk. Radon decays into radioactive polonium (Z = 84) and has a half-life of 3.8 days.

Ra-226 has a half-life of 1600 years, a significant difference from the other radioactive isotopes of radium that decay over a short period of time. It possesses 138 neutrons in its nucleus and 88 protons, which is equal to the number of electrons in its shells, giving it a mass number of 226.

A reaction's half-life is the amount of time needed for the reactant concentration to drop to half its initial value.

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If the concentration of Hâ (g) is increased, the reaction will shift to the right to form more product (2HI).

This is because Le Chatelier's principle states that if a stress is applied to a system at equilibrium, the system will shift in a way that reduces the stress.

In this case, increasing the concentration of one reactant (Hâ) will create an imbalance, and the system will shift towards the side with fewer moles of gas (the product side) to reduce the concentration of Hâ and establish a new equilibrium.

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35g

Noting the mass of scientific tools such as beakers can help us take the mass of liquids and other samples that cannot be measured on their own.

Mass of the Liquid

To find the mass of the liquid, we have to know the mass of the beaker. Then, we can subtract the mass of the beaker from the mass of the liquid and beaker combined. This will leave the mass of the liquid.

The liquid has a mass of 35g.

Significant Figures and Units

Whenever doing scientific calculations, it is important to include significant figures and units.

Significant figures show the accuracy of a measurement. When, subtracting numbers, round to the smallest number of decimal places. Neither measurement has decimal points, thus the answer also should not have a decimal point. Thus the answer is just 35.

Then, make sure you have units. Since the original measurements are in grams, the answer should also be in grams. So, the final answer is 35 grams.

Answer:

Two hydrogen atoms and one oxygen atom (water) was removed.

Explanation:

yw:))

0.0333 moles of NO gas can be formed If 0.10 moles of powdered silver is added to 10.0 milliliters of 6.0-molar nitric acid,

The balanced chemical equation for the reaction between powdered silver and nitric acid is:

3Ag(s) + 4HNO3(aq) → 3AgNO3(aq) + NO(g) + 2H2O

(l) 0.10 moles of powdered silver is added to 10.0 milliliters of 6.0-molar nitric acid. The volume of 10.0 milliliters of 6.0-molar nitric acid is: 10.0 / 1000 L = 0.01

The number of moles of nitric acid used is: moles = molarity x volume (in liters) moles of HNO3 = 6.0 mol/L x 0.01 L = 0.06 moles of HNO3 From the balanced equation, it can be observed that 3 moles of Ag produce 1 mole of NO.

Therefore, 0.10 moles of powdered silver will produce moles of NO: moles of AgNO3 = 0.10 moles Ag x 1 mol AgNO3/3 mol Ag = 0.0333 moles AgNO3 moles of NO = 0.0333 moles AgNO3 x 1 mol NO / 1 mol AgNO3 = 0.0333 moles NOTherefore, 0.0333 moles of NO gas can be formed.

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The chemical equilibrium has the concentration of reactants and products equal. The addition of NaCl shifts the equilibrium towards the left, leading to soap precipitation.

The chemical equation for the reaction is:

\(\rm C_{17}H_{35}COONa\;\leftrightharpoons C_{17}H_{35}COO^-\;+\;Na^+\)

The addition of NaCl to the reaction results in the dissociation of Na and Cl ions.

At the equilibrium condition, the concentration of all the species is equal. The addition of NaCl results in an increase in the product concentration in the solution, with the common ion effect.

The increase in the product concentration results in the reaction moving towards the reactant formation and process in the left direction.

Thus, the addition of NaCl shifts the equilibrium towards the left, leading to soap precipitation. Thus, option B is correct.

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Answer:

the correct answer is (B The equilibrium will shift to the left to such an extent that it leads to the precipitation of solid soap.)

i just took the test

Explanation:

For standard electrochemical cells a redox reaction is the spontaneous if the standard electrode potential for the redox reaction,

E°(redox reaction), is then positive.

E°(redox reaction) = E°(reduction reaction) + E°(oxidation reaction)

and E°(redox reaction) > 0

that is, E°(redox reaction) is positive

If E°(redox reaction) is positive,  then the reaction will proceed in forward direction as it will be spontaneous.

Gibbs free energy, sometimes referred to as  Gibbs function, Gibbs energy, or free enthalpy, is a unit used to quantify  most work that can be performed in a thermodynamic system while maintaining constant conditions of temperature and pressure.

Spontaneous redox reactions can be used to produce the electricity

If E°(redox reaction) is negative (E°(redox reaction) < 0),

here, reaction will not proceed in the forward direction (non-spontaneous).

The reaction will be spontaneous in the  reverse direction of reaction.

And non-spontaneous redox reactions cannot be used to produce the  electricity.

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Answer:

Thanks!!!

Explanation:

Answer:

true

Explanation:

The intermolecular force of attraction in liquid molecules affect their flow as well their viscosity. As the viscosity of the liquid increases, its rate of flow decreases.

Viscosity of a  liquid is the measure of resistance to its flow. The fluidity, a measure indicating the ease of flow, is the reciprocal of viscosity. For instance, molasses is more viscous than water.

Viscosity can be thought of as internal friction between the molecules; this friction prevents the development of velocity disparities within a fluid since a section of a fluid that is compelled to move carries along nearby parts to some extent.

When fluids are employed as lubricants and carried through pipelines, their viscosity plays a significant role in determining the forces that need to be overcome.

Hence, the property viscosity is illustrated in this example.

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1) The reaction is exothermic and heat is a product

2) The color would turn to pink.

Let us recall that an endothermic reaction is one in which the increase in the temperature of the system would drive the forward reaction. This implies that the equilibrium would shift to the right when the set up is heated. Since the color of the solution changes to blue when heated hence the reaction is exothermic.

If you removed heat by placing the solution in the ice bath, we can see that we have removed the heat thus we expect that the reverse reaction would take place and the color would change to pink.

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(1) The average kinetic energy of the Xe atom will be the same

(2) Container B's walls will have more atomic collision force.

(3) The root mean square velocity will be same

(4) Collision is higher in container B than in container A.

(5) Container B will experience more pressure than container A.

(1) Average kinetic energy

Absolute temperature has a direct relationship with average kinetic energy. The average kinetic energy of the Xe atom will be the same because the temperatures in both containers are the same.

(2) Force due to collisions with walls

The volume of the container has an inverse relationship with the force of atomic collisions. Container B is shorter since it contains less volume. As a result, container B's walls will experience more atomic collision force.

(3) The root mean square velocity

The root mean square velocity of the Xe atoms in both containers will be the same because they are both at the same temperature.

(4) The collision frequency with other atoms  

The volume of the container has an inverse relationship with the frequency of collisions with other atoms. Because container B is smaller than container A, the frequency of Xe atoms colliding with other atoms will be higher in container B than in container A.

(5) Pressure in two containers

As is common knowledge, pressure and volume are inversely related. A container has a larger volume than container B. Thus, container B will experience more pressure than container A.

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You have two containers each with 1 mole of Xenon gas at \(15^{0}\) C. Container A has a volume of 3.0 L, and the container B has a volume of 1.0 L. Explain how the following quantities compare between the two containers:

4.5 moles of magnesium phosphate contains 8.14 × 10²⁴ magnesium ions.

Magnesium phosphate, represented as Mg₃(PO₄)₂, consists of three magnesium ions (Mg²⁺) and two phosphate ions (PO₄³⁻) in each molecule.

3 times the atomic mass of magnesium (Mg) plus 2 times the atomic mass of phosphorus (P) plus 8 times the atomic mass of oxygen (O).

Each mole of Mg₃(PO₄)₂ contains 3 moles of Mg²⁺ ions. Therefore, multiplying the number of moles of Mg₃(PO₄)₂ by the ratio of moles of Mg²⁺ ions to moles of Mg₃(PO₄)₂ gives us the number of moles of Mg²⁺ ions.

So 8.14 × 10²⁴ magnesium ions is present in 4.5 moles of magnesium phosphate.

Avogadro's number, which states that 1 mole of a substance contains 6.022 × 10²³ particles, the total number of magnesium ions. The moles of Mg²⁺ ions by Avogadro's number gives us the number of magnesium ions in the sample.

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To calculate the molarity of a solution, we need to divide the moles of solute by the volume of the solution in liters. Here's how we can calculate it step by step:

Convert the mass of Na2CrO4 to moles:

  The molar mass of Na2CrO4 can be calculated by adding the atomic masses of each element:

  Na: 22.99 g/mol x 2 = 45.98 g/mol

  Cr: 52.00 g/mol

  O: 16.00 g/mol x 4 = 64.00 g/mol

  Total molar mass = 45.98 g/mol + 52.00 g/mol + 64.00 g/mol = 161.98 g/mol

  Now, we can calculate the moles of Na2CrO4 by dividing the given mass by the molar mass:

  Moles of Na2CrO4 = 12.9 g / 161.98 g/mol ≈ 0.0795 mol

Convert the volume of the solution to liters:

  The given volume is 720 mL. We need to convert it to liters by dividing by 1000:

  Volume of solution = 720 mL / 1000 mL/L = 0.720 L

Calculate the molarity:

  Molarity (M) = Moles of solute / Volume of solution in liters

  Molarity = 0.0795 mol / 0.720 L ≈ 0.11 M

Therefore, the molarity of the solution prepared by dissolving 12.9 g of Na2CrO4 in enough water to produce a solution with a volume of 720 mL is approximately 0.11 M.

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A. The unpaired electron in the outer shell of the compound CH3 makes it a free radical species and extremely reactive.

A species known as a free radical is one that has an unpaired electron in its outer shell, making it highly reactive and capable of taking part in chemical processes that can be both good and bad. A free radical is represented by the symbol •. Only A is an option from the list. The existence of an unpaired electron is indicated by the presence of the symbol for •CH3:. So, •CH3 is a type of free radical. Free radicals play a role in a number of biological and chemical processes, including immunological response, oxidative damage, and cell signalling.

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The net force on the plane is 700 N.

We know that force is that which causes motion. Force is a vector quantity. This implies that the force force could have both a magnitude and a direction. The direction of force is the area where the force acts towards.

In this case, we have an airplane that is acted upon by three forces;

Taking the direction of the engine force as positive and the direction of the air friction and the wind force as negative we can now obtain the magnitude of the net force that acts on the plane as;

800 N - ( 40 N + 60 N) = 700N

Hence the net force on the plane is 700 N.

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The molarity of the calcium hydroxide solution is 0.0696 M

These are essentially 4-step problems.

1. Write and balance the equation. If we call potassium hydrogen phthalate just KHP, then

Ca(OH)2 + 2KHP ==> 2H2O + CaP + K2P

2. Convert grams to moles. moles KHP = 0.990/molar mass KHC8H4O4 = 0.990/179 = approximately 0.0055

3. Using the coefficients in the balanced equation, convert moles KHP to moles Ca(OH)2

0.0055moles KHP x (1 mole Ca(OH)2/2 moles KHP) = 0.0055 x (1/2) = 0.00275 moles Ca(OH)2.

4. M Ca(OH)2 = moles Ca(OH)2/L Ca(OH)2

 M Ca(OH)2 = 0.00275/0.0395 = approximately 0.0696 M

Part B is done the same way. Now that you have the Ca(OH)2 standardized, use that, with the same process, to determine the molarity of the HI.

Remember that moles = M x L.

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Answer:

solute and solvent

Explanation:

Because solutes dissolves in solvent to form a solution

A reaction in equilibrium with an equilibrium constant of 85.0 can be used to explain the extraction of iodine from water using the nonpolar solvent CCl4. 3.14 x 10-6 mol of I2 are still present in the aqueous layer following extraction.

Iodine extraction involves taking the element out of one medium and putting it in another. Iodine is an element that occurs naturally and can be found in a variety of states, including as a gas, solid, or solution. Iodine's solubility in a solvent is influenced by the solvent's composition and the iodine's form. Iodine is soluble in water, although it is more soluble in nonpolar solvents like carbon tetrachloride (CCl4). This means that after shaking a solution of water and CCl4, iodine will prefer to collect in the nonpolar solvent. A reaction in equilibrium with an equilibrium constant can be used to model the extraction of iodine. After extraction, the amount of iodine left in the water layer can be determined.

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The final gas pressure : 175.53 atm

Maybe the complete question is like this :

A ridged steel tank filled with 62.7 l of nitrogen gas at 85.0 atm and 19 °C is heated to 330 °C while the volume remains constant. what is the final gas pressure?

The volume remains constant⇒Gay Lussac's Law  

When the volume is not changed, the gas pressure in the tube is proportional to its absolute temperature  

\(\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}\)

P₁=85 atm

T₁=19+273=292 K

T₂=330+273=603 K

\(\tt P_2=\dfrac{P_1\times T_2}{T_1}\\\\P_2=\dfrac{85\times 603}{292}\\\\P_2=175.53~atm\)