Ammonium perchlorate is a powerful solid rocket fuel, used in the Space Shuttle boosters. It decomposes into nitrogen gas, chlorine gas, oxygen gas and water vapor, releasing a great deal of energy. Calculate the moles of ammonium perchlorate needed to produce 0.090 mol of water

The physical method that can be used for obtaining a sample of salt from a small beaker of salt and water would be evaporation.

A mixture of salt and water can be separated by a method known as evaporation. This is based on the assumption that the salt in question is a water-soluble salt.

In order to separate the salt/water mixture:

Care should be taken not to overheat the residue in order to avoid melting. Evaporation is generally used to separate a mixture of water and soluble salt. If the salt is insoluble, filtration using a suitable filter paper will filter off the salt while the water is collected as the filtrate.

More on evaporation can be found here: https://brainly.com/question/1097783

#SPJ1

Which physical method can be used for obtaining a sample of salt from a small beaker of salt water?

The best describes her speed and velocity is; Her speed is 4. 4 m/s, and her velocity will be 0 m/s. Option A is correct.

Lila's speed will be calculated by dividing the total distance she covered by  time it took her to complete the race;

Speed = Total distance/Time

In this case, Lila will covered 4 laps, which is a total distance of 4 x 400 = 1600 meters. She completed the race in 6 minutes, which is 6 x 60 = 360 seconds. Therefore, her speed is;

Speed = 1600 meters / 360 seconds

Speed = 4.44 m/s (rounded to two decimal places)

Velocity, on the other hand, is a vector quantity that takes into account both speed and direction. Since Lila ran four laps around a circular track, she ended up at the same position where she started. However, her displacement (change in position) is zero, which means her velocity is also zero.

Hence, A. is the correct option.

To know more about velocity here

https://brainly.com/question/17127206

#SPJ4

--The given question is incomplete, the complete question is

"Lila is a track and field athlete. She must complete four laps around a circular track. The track itself measures 400 meters from start to finish and the race took her 6 minutes to complete. Which best describes her speed and velocity? A) Her speed is 4. 4 m/s, and her velocity is 0 m/s. B) Her speed is 1. 1 m/s, and her velocity is 0 m/s. C) Her speed is 0 m/s, and her velocity is 2400 m/s. D) Her speed is 4. 4 m/s, and her velocity is 4. 4 m/s"--

Answer: 1.91 moles

Explanation:

First you want to find the molar mass of NaCL

Na = 22.99g  Cl = 35.45g

22.99g + 35.45g = 54.44g

Then divide 111.5g by 54.44g and this will give you moles.

Answer:

n=4

Explanation:

n= (154.75×28.40)÷(68.45×18)

n=3.5

n=4(approximately)

1.643 g mass of acid has been dissolved

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

\(\large \boxed {\bold {M ~ = ~ \dfrac {n} {V}}}\)

Where

M = Molarity

n = number of moles of solute

V = Volume of solution

Molarity of HCl solution = 0.3 M

Volume of HCl solution = 150 ml=0.15 L

So moles of HCl :

\(\tt n=M\times V\\\\n=0.3\times 0.15\\\\n=0.045\)

mass of HCl (MW=36.5 g/mol) :

\(\tt mass=moles\times MW\\\\mass=0.045\times 36.5\\\\mass=1.643~g\)

It would take approximately 0.144 hours to produce 7.5 moles of copper metal using the given current and cell potential.  

To produce 7.5 moles of copper metal from an electrolytic cell, we can use the following equation:

moles of copper produced = moles of Cu produced

here:

moles of Cu produced is the number of moles of Cu that are produced as the Cu ions dissolve in the solution and move towards the cathode.

We are given that the current passed through the cell is 50.0 A and the cell potential is 2.50 V. Therefore, we can calculate the number of moles of Cu produced using the following equation:

moles of Cu produced = -50.0 A x 2.50  x time

To find the time required to produce 7.5 moles of copper, we can rearrange the equation as follows:

time = -moles of Cu produced / (50.0 A x 2.50 V)

time = -7.5 moles / (50.0 A x 2.50 V)

time = 0.144 hours

Therefore, it would take approximately 0.144 hours to produce 7.5 moles of copper metal using the given current and cell potential.  

Learn more about moles visit: brainly.com/question/29367909

#SPJ4

Answer:

70 because it is subtracted 121 by 51 to give u 70 use m

Answer: Precipitation forms in the clouds when water vapor condenses into bigger and bigger droplets of water. When the drops are heavy enough, they fall to the Earth.

Explanation: Have a blessed day!

Answer: Precipitation forms in the clouds when water vapor condenses into bigger and bigger droplets of water. When the drops are heavy enough, they fall to the Earth.

Explanation:hope this helps u

Answer:

1.56x10^23 atoms of Mn

Explanation:

250 grams of braunite (Mn3SiO6) is:

  (250 g)/(288.91 g/mole) = 0.865 moles of Mn3SiO6

One mole of Mn3SiO6 would contain 3 moles of Mn, since it appears 3 times in the compound.  Breaking apart 1 mole of Mn3SiO6 into individual atoms of each element would procude 3 moles of Mn atoms (and 1 mole of Si and 6 moles of O atoms),

Since we have 0.865 moles of Mn3SiO6,

we should have:

    (0.865 moles of Mn3SiO6)*((3 moles of Mn)/(1 mole Mn3SiO6))

 this is equal to 2.596 moles of Mn atoms

Since 1 mole is 6.02x10^23 particles of anything, we can write:

(2.596 moles of Mn)*(6.02x10^23 particles Mn atoms/mole) =

          1.56x10^23 atoms of Mn

The change in internal energy for this reaction is -150 kJmol-1.

The change in internal energy for this reaction is -150 kJmol-1.

Here's how to get this result:

Enthalpy, ΔH = -1623 kJmol-1

For a reaction at constant pressure, ΔH = ΔU + Δ(PV)

But, at constant pressure, Δ(PV) = PΔV = 0, as there's no change in the volume of the reactants or products.

ΔH = ΔU ΔH = -1623 kJmol-1ΔU = -1623 kJmol-1

So, the change in internal energy for this reaction is -150 kJmol-1.

This is because:

ΔU = ΔH - Δ(PV)

Since Δ(PV) = 0,ΔU = ΔH

Learn more about internal energy eith the given link,

https://brainly.com/question/25737117

#SPJ11

Answer:

4. C2H4, C3H6, C4H8

this is the alkane homologous series of hydrocarbons.

Their general formula is CnH2n

you can check this fits for all these compounds

put n = 1, 2, 3 and so on

0.540 moles of hydrogen bromide can be made from 6.6 L of hydrogen gas.

We can use the balanced chemical equation to determine the stoichiometry of the reaction and calculate the number of moles of HBr produced.

From the balanced chemical equation:

1 mol of H2 reacts with 1 mol of Br2 to produce 2 moles of HBr.

Since we are given the volume of hydrogen gas, we need to convert it to moles using the ideal gas law:

PV = nRT

Where

Assuming standard temperature and pressure (STP) conditions of 0°C and 1 atm, the volume of 6.6 L of hydrogen gas is:

n = PV/RT = (1 atm) x (6.6 L) / [(0.08206 L atm mol^-1 K^-1) x (273 K)]

n = 0.270 mol

Since the balanced chemical equation tells us that 2 moles of HBr are produced for every 1 mole of H2, we can calculate the number of moles of HBr produced as:

moles of HBr = (0.270 mol H2) x (2 mol HBr/1 mol H2) = 0.540 mol HBr

Therefore, 0.540 moles of hydrogen bromide can be made from 6.6 L of hydrogen gas.

Learn more about ideal gas law here : brainly.com/question/909628

#SPJ1

Answer:

In cellular respiration, complex molecules containing carbon react with oxygen to produce carbon dioxide and other materials. ... Matter is conserved during cellular respiration because atoms are conserved in physical and chemical processes

Explanation:

I hope this helps

The potassium nuclide, symbolized as K, decays by positron emission, which means that it emits a positron (a particle with the same mass as an electron but with a positive charge). The resulting nuclide is one atomic number lower and has the same mass number. Here is the balanced nuclear chemical equation for the decay of potassium by positron emission:

39 19 K → 39 18 Ar + 0 1 e + + ν

In this equation, the atomic number (or the number of protons) is shown as a subscript on the left-hand side and the mass number (or the number of protons plus neutrons) is shown as a superscript. The positron emission is shown as 0 1 e +, and the antineutrino (ν) is also emitted to balance the equation. The resulting nuclide on the right-hand side is argon, symbolized as Ar.

To know more about positron , refer here:

https://brainly.com/question/31818947#

#SPJ11

Answer:

The new volume of the balloon will be approximately 77.7 mL (3 s.f.).

Explanation:

We can assume that the pressure remains constant, since the balloon is not being compressed or expanded, and is simply being exposed to a different temperature. Therefore, to solve this problem, we can use Charles's Law, which relates the volume and temperature of a gas.

\(\boxed{\sf \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}}\)

where:

Given the balloon is initially filled with 47 mL of hydrogen gas at 276 K, and its temperature is raised to 456 K:

Substitute the given values into the formula:

\(\implies \sf \dfrac{47\;mL}{276\;K}=\dfrac{V_2}{456\;K}\)

Solve for V₂:

\(\implies \sf \dfrac{47\;mL}{276\;K} \cdot 456\;K=\dfrac{V_2}{456\;K} \cdot 456\;K\)

\(\implies \sf V_2=\dfrac{47\;mL\cdot 456\;K}{276\;K}\)

\(\implies \sf V_2=77.6521739...\;mL\)

\(\implies \sf V_2=77.7\; mL\; (3\;s.f.)\)

Therefore, the new volume of the balloon will be approximately 77.7 mL when the temperature is raised to 456 K.

\(\blue{\huge {\mathrm{CHARLES' \; LAW}}}\)

\(\\\)

\({===========================================}\)

\({\underline{\huge \mathbb{Q} {\large \mathrm {UESTION : }}}}\)

\({===========================================}\)

\( {\underline{\huge \mathbb{A} {\large \mathrm {NSWER : }}}} \)

\({===========================================}\)

\({\underline{\huge \mathbb{S}{\large \mathrm {OLUTION : }}}}\)

We can use Charles' Law to solve this problem, which states that at constant pressure, the volume of a gas is directly proportional to its absolute temperature:

where:

Solving for \(\sf V_2\), we get:

\(\begin{aligned}\sf V_2& =\sf \dfrac{(V_1 \cdot T_2)}{T_1} \\& =\sf \dfrac{(47\: mL \cdot 456\: K)}{276\: K} \\ & = \boxed{\bold{\:77.7\: mL\:}} \end{aligned}\)

Therefore, the new volume of the balloon at a temperature of 456 K is 77.7 mL.

\({===========================================}\)

\(- \large\sf\copyright \: \large\tt{AriesLaveau}\large\qquad\qquad\qquad\qquad\qquad\qquad\tt 04/02/2023\)

Prior to melting, both compounds were solids at first. Both samples were the same mass. The melting point of substance A is the same as that of substance B.

Two pure substance samples are heated continuously, and temperature is measured as a function of time. Melting point is the temperature at which a substance changes state from a solid to a liquid (or, less frequently, liquefaction point). At the melting point, there is an equilibrium between the solid and liquid phases. Chemicals that are produced by the chemical industry can be divided into three groups based on the volume of production: bulk chemicals, fine chemicals, and chemicals found. Prior to melting, both components were solids at first. Both samples were the same mass. The melting point of substance A is the same as that of substance B.

Learn more about compounds here

https://brainly.com/question/12166462

#SPJ4

A heat sensing resistor that changes its value as its temperature changes is known as a Thermistor.

The Thermistor is a special type of variable resistive detail that adjustments its physical resistance while uncovered to modifications in temperature. The Thermistor is a solid kingdom temperature sensing device which acts a chunk like an electrical resistor however is temperature touchy. A thermistor is a temperature sensitive resistor. they may be regularly used as a temperature sensor.

Thermocouples are the maximum generally used form of temperature sensor. they are used in business, automotive, and purchaser programs. Thermocouples are self-powered, require no excitation, can function over a extensive temperature variety, and feature brief response times.

Learn more about Thermistor here:-https://brainly.com/question/14531016

#SPJ4

Answer:

the answer is coal

Explanation:

Answer:

B

Explanation:

Answer:

b. to determine how fast

Explanation:

edg 22

To match each ion to its corresponding electron configuration, we need to consider the number of electrons gained or lost by each ion. Let's analyze each ion and determine their electron configurations:

K^+ (Potassium ion): Potassium (K) normally has an electron configuration of [Ar]4s1. However, since it loses one electron to become K^+, its electron configuration will be [Ar]4s0.

Ca^2+ (Calcium ion): Calcium (Ca) has an electron configuration of [Ar]4s2. By losing two electrons to become Ca^2+, its electron configuration will be [Ar]4s0.

Ti^4+ (Titanium ion): Titanium (Ti) typically has an electron configuration of [Ar]4s23d2. When it loses all four of its valence electrons, it forms Ti^4+, with an electron configuration of [Ar]3d2.

V^5+ (Vanadium ion): Vanadium (V) usually has an electron configuration of [Ar]4s23d3. When it loses five electrons to become V^5+, its electron configuration will be [Ar]3d0.

The correct matching of each ion to its electron configuration is:

K^+: [Ar]4s^2

Ca^2+: [Ar]4s^2

Ti^4+: [Ar]3d^2

V^5+: [Ar]3d^3

In summary, the matching electron configurations for the given ions are as follows: K^+ -> [Ar]4s0, Ca^2+ -> [Ar]4s0, Ti^4+ -> [Ar]3d2, and V^5+ -> [Ar]3d0.

To know more about  electron , visit:

brainly.com/question/12001116

#SPJ11

Answer:

number 6, sorry late answer

Explanation:

Sound travels best in solids poorest in air and medium in liquids.

Sound does not travel in a vacuum

Answer:

58.29 g/mole (or 58.3 g/mole for 3 sig figs)

Explanation:

The term molecular, or molar mass of an atom or molecule is the number of grams of that substancce that is required to provide Avagadro's number of particles (atoms/molecules) of that substance.  If 0.0275 mole weighs 1.603 grams, we can find the molar mass by dividing the two given values:

  (1.603 grams)/(0.0275 moles) = 58.29 g/mole.

Note that the division of grams by the moles yileds the correct unit:  grams/mole.  The division essentially tells us how many grams are in one mole of the substance.

The molecular mass of milk of magnesia if 0.0275 mol weighs 1.603g is 58.29g/mol.

Molecular mass refers to the mass of an individual molecule of an element or compound.

The molecular mass of a substance can be calculated by dividing the mass of that substance by the number of moles it contains as follows:

molecular mass = mass ÷ no of moles

According to this question, 0.0275 moles of magnesia weighs 1.603g. The molecular mass can be calculated as follows:

molecular mass = 1.603g ÷ 0.0275moles

molecular mass = 58.29g/mol

Therefore, 58.29g/mol is the molecular mass of magnesia.

Learn more about molecular mass at: https://brainly.com/question/14122402

#SPJ1

Oxygen gas is produced at the positive electrode of the solution.

We know that the term electrolysis has to do with the process by which we can be able to cause the splitting of a compound that is ionic when we pass a direct current through the solution of the compound.

Now we know that at the negative electrode, we are going to have the copper metal that is discharged but at the positive electrode, we are going to have the discharge of oxygen gas. This is because it is higher in the series than sulfate ions.

Learn more about electrolysis:https://brainly.com/question/12054569

#SPJ1

Direct evidence of pre-industrial revolution CO₂ fluctuations can be found through various sources, including ice cores, sediment and coral records, historical documents, and plant stomata analysis.

Direct evidence of pre-industrial revolution CO₂ fluctuations can be found by analyzing various sources, such as:

Ice cores: Ice cores extracted from glaciers and polar ice sheets provide a historical record of atmospheric composition dating back hundreds of thousands of years. By analyzing air bubbles trapped in the ice, scientists can measure the concentration of CO₂ in the atmosphere over time. This allows them to study pre-industrial levels of CO₂ and track its natural fluctuations.

Sediment and coral records: Sediment cores from the ocean floor and coral reef structures also provide valuable information about past CO₂ levels. The chemical composition of sediments and the growth rings of corals can be analyzed to estimate CO₂ concentrations in the past. These records can extend back thousands of years, providing insights into pre-industrial CO₂ fluctuations.

Historical records: Historical documents, including scientific journals, diaries, and reports, may contain observations and measurements of atmospheric conditions, including CO₂ concentrations, before the industrial revolution. These records can offer valuable direct evidence of CO₂ levels from specific locations and time periods.

Plant stomata: Stomata are small openings on the surfaces of leaves that allow for gas exchange, including the uptake of CO₂ during photosynthesis. Fossilized leaves and plant remains can be examined to measure the density and size of stomata, which can provide indirect evidence of CO₂ concentrations in the past. This method has been used to estimate CO₂ levels in pre-industrial periods.

Learn more about pre-industrial revolution from the link given below.

https://brainly.com/question/32875142

#SPJ4

Answer:

protons and electrons

Explanation:

protons give off a positive charge and electrons give off a negative charge