What do the observations for changes to volume and pressure show you about the
relationship between the volume and pressure of a gas? Explain using the data! Does
this demonstration support Boyle's Law or not?
(Hint: pressure is not being measured in this video, but think what would happen to a
balloon if it was squeezed or compressed. Would it get larger or smaller?)

Answer:

1.54grams

Explanation:

Molarity of a solution = n/V

Where;

n = number of moles (mol)

V = volume (L)

Based on the information given in this question;

Volume of NaOH solution = 5.0 × 10ml

= 50ml = 50/1000 = 0.050 L

Molarity = 0. 77 M

Using; Molarity = n/V

0.77 = n/0.05

n = 0.77 × 0.05

n = 0.0385mol

To find the mass (grams) of NaOH in the solution, we use the following formula:

mole (n) = mass/molar mass

Molar mass of NaOH = 23 + 1 + 16 = 40g/mol

0.0385 = mass/40

mass = 0.0385 × 40

mass = 1.54grams.

Answer:

623 kgm^-3

Explanation:

Density = Mass/Volume

Mass = 1209 kg

Volume = 1.94 m^3

Density = 1209 / 1.94 kgm^-3

             = 623.1958763 kgm^-3

             = 623 kgm^-3 (3sf)

Answer:

A Parasite.

Explanation:

Viruses and bacteria can survive in most areas without a host. Parasites however need a host to survive. Some parasites include: tapeworm, roundworms, flukes, and protozoa.

Answer:

D

Explanation:

I think it's D but not 100% sure

The pressure that pushes electrons to the cathode is derived from the negative charge of electrons at the anode. Hence, option B is correct.

An electrolytic cell is a type of electrochemical cell that undergoes non-spontaneous reactions by deriving the energy in the form of voltage from external sources.

A voltaic cell is a cell in which chemical reactions are used to produce electrical energy in form of current.

Such a cell is made up of two electrodes and their electrolytes. The electrodes are connected via a salt bridge. The salt bridge allows electrons to move between the electrodes.

In a voltaic cell, an oxidation reaction occurs in the anode. During oxidation, electrons are produced. Therefore, the Na electrode in the anode will lose an electron spontaneously. At the cathode, reduction occurs. The Iron electrode here will gain the electron produced by the oxidation reaction at the anode. The salt bridge moves the electrons from the anode to the cathode.

Hence, the pressure that pushes electrons to the cathode is derived from the negative charge of electrons at the anode.

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Answer:

Convection

Explanation:

Answer:

pH = 12.5

Explanation:

The reaction that takes place is

The OH⁻ species come from the metal hydroxide of the solution, and Pb(OH)₂ is the precipitate.

Now we convert 3.81 grams of Pb(OH)₂ into moles, using its molar mass:

Now we convert 0.0158 Pb(OH)₂ moles into OH⁻ moles, using the stoichiometric coefficients of the reaction:

With the given concentration (1 L), we calculate [OH⁻]:

Then we calculate the pOH of the solution:

And finally we calculate the pH:

Answer:

uhhh D  .-.

Explanation:

Answer:C

Explanation:

Answer:

Following are the responses to the given choices:

Explanation:

The pressure of a container with a volume of 8.95 L holds 0.155 mol of N₂ at 23°C is  42.64 atm.

Ideal gas law is also called as perfect gas law. It is represent by the equation PV = nRT, where, 'P' is the pressure, 'V' is the volume in liters, 'n' is the number of particles in moles, 'T' is the temperature in Kelvin and 'R' is the ideal gas constant.

By ideal gas equation,

PV = nRT

Where,

P = Pressure

V = Volume

n = Number of moles

R = gas constant

T = Temperature

First convert temperature into kelvin

23°C + 273 = 296.15K

By putting given value in ideal gas equation we can solve this problem

P × 8.95 = 0.155 × 8.314 × 296.15 ÷ 8.95

= 381.64 ÷ 8.95

= 42.64 atm

Thus, The pressure of a container with a volume of 8.95 L holds 0.155 mol of N₂ at 23°C is  42.64 atm.

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To solve this we must be knowing each and every concept related to ore and bauxite. Therefore, Bauxite is best used for making wires. The correct option is option B.

Aluminum's primary source of supply is bauxite. Due to its small weight and ease of molding into fine wire or sheets, aluminum is particularly useful.

All across the world, bauxite may be found. The greatest deposits of this ore are in Australia and Guinea, an African nation. Although bauxite was initially found in France, it may now be found all over the world, such as the Caribbean.

Therefore, Bauxite is best used for making wires. The correct option is option B.

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Answer:

See Explanation

Explanation:

Both oxygen and dinitrogen (1) oxide are known to rekindle a glowing splint. However, oxygen is an odorless gas while dinitrogen (1) oxide has a faint smell and has an effect on the central nervous system.

Also, the combustion of dinitrogen (1) oxide produces brown fumes of nitrogen IV oxide.

Finally, when dinitrogen (1) oxide and oxgen are both heated with copper, residual nitrogen gas is left with dinitrogen (1) oxide while no residual gas is left with oxygen.

Answer:

Particle Symbol Mass

electron e- 0.0005486 amu

proton p+ 1.007276 amu

neutron no 1.008665

Answer:

Some clouds form as air warms up near the Earth's surface and Rises heated by Sunshine the ground heats the air just above it that warm air starts to rise because when warm it is lighter and less dense than the air around it as it rises its pressure and temperature drop causing water vapor to condense.

When airborne water vapor condenses into observable water droplets or ice crystals, clouds are created.

Condensation is most likely the cause of cloud formation. The transformation of airborne water vapor into a liquid or solid state is known as condensation. When the air is cooled or the pressure of the water vapor is raised, this occurs.

Water vapor from the Earth's surface is constantly evaporating into the atmosphere. When this water vapor rises, it cools in the atmosphere. The pressure of water vapor rises as the air cools. Water vapor will condense on minute airborne particles like dust, pollen, or salt crystals when the water vapor pressure reaches a particular level.

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Explanation:

The reaction is as follows:

2Mg(s) + O2(g) ---> 2MgO(s)

and the researcher said that 32 g of MgO was produced.

Stoichiometry:

28 g Mg × (1 mol Mg/24.305 g Mg) = 1.15 mol Mg

15 g O2 × (1 mol O2/15.999 g O2) = 0.938 mol O2

1.15 mol Mg × (2 mol MgO/2 mol MgO) = 1.15 mol MgO

1.15 mol MgO × (40.3044 g MgO/1 mol MgO) = 46.6 g MgO

0.938 mol O2 × (2 mol MgO/1 mol O2) = 1.88 mol MgO

1.88 mol MgO × (40.3044 g MgO/1 mol MgO = 75.6 g MgO

Based on these numbers, the amount of product after the reaction is much less than expected so these results don't seem to support the law of conservation of matter.

How does a river form a delta?

Deltas are wetlands that form as rivers empty their water and sediment into another body of water. ... Deltas are wetlands that form as rivers empty their water and sediment into another body of water, such as an ocean, lake, or another river. Although very uncommon, deltas can also empty into land.

Answer:

Valence electrons are the number of electrons in an outer shell of an atom that can participate in forming chemical bonds with other atoms.

Answer:

It's IF5. ................

The most soluble substances gives more number of particles in solution. 1.0 M of sodium sulphate contains most particles here.

Solubility of a solute is the fraction of its concentration which is dissolved in a solvent. When solutes dissolved in solvent the dissociates into ions.

Solubility of a substance depends on the temperature, pressure, bond type and molecular weight of the compound. The no.of particles produced by a molecule when dissolved vary from compound to compound.

Glucose and ethylene glycol partially dissolves in water and they give only one particle as such and does not form ions.

Potassium chloride gives one K⁺ ions and Cl⁻ ions and magnesium sulphate gives one Mg²⁺ and SO₄²⁻ ions. Whereas, sodium sulphate (Na₂SO₄) gives two sodium ions and one sulphate ion.

Hence, more particles are produced when sodium sulphate is dissolved in water. Therefore, 5th option is correct.

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Answer:

1500/290 = x/210 = 1086.2 L

Explanation:

This problem is solved with Charles Law which says

V¹/T¹ = V²/T²

For the given reaction, according to Le -Chatlier principle adding a catalyst will bring the reaction to the right. Removing the hydrogen gas shift  the equilibrium to the left and increasing pressure also shift to right.

According to this principle, when some a disorder is affecting the equilibrium of the system. The system balanced the factors which created the disorder and make  a new equilibrium.

A catalyst always helps to proceed the reaction in the forward direction. Thus adding a catalyst shift the equilibrium to the right.

If any  reactant or produced is removed from the system, the system shifts to the equilibrium to that direction in which they are producing. Removing hydrogen gas will then shift the reaction to the right to produce more hydrogen.

Increasing pressure shift the equilibrium to those direction in which the number of number of moles of gases decreases. Hence, the reaction shifts to the right here.

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Answer: S-block elements

Explanation: Elements of S-block are prepared through the electrolysis process not by the reduction of their compounds with the other group elements of their compounds. For example in Carbon dioxide carbon is non reducing because oxidation state of `C "in" CO_(2)` is `+4`, which is maximum So it does not undergo oxidation, and hence, it is not a reducing agent.

7.9 g/cm3 is the density of iron.  There are three possibilities: 1.3 × 103 g 2.3 × 10-2 g 4.3 × 102 g 2.1 × 104 g 1.4 g.

Iron has a density of 7.874g/cm3.

At atmospheric pressure, different substances have their typical densities.

The mass per unit volume is the definition of density. Mathematically speaking, its intense attribute is defined as mass divided by volume:

ρ = m/V

The total mass (m) of a material divided by the total volume (V) . it occupies is how a substance is defined as having a density (). The kilogram per cubic meter (kg/m3) is the metric unit used by the SI. The pounds mass per cubic foot (lbm/ft3) measurement is used in Standard English.

Compressibility (also known as the coefficient of compressibility is a measure of the relative volume change of a fluid or solid as a response to a pressure (or mean stress) change.

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Answer:

Attached below

Explanation:

Free energy of mixing = ΔGmix = Gf - Gi

attached below is the required derivation of the

a) Molar Gibbs energy of mixing

ΔGmix = Gf - Gi

hence : ΔGmix = ∩RT ( X1 In X1 + X2 In X2 + X3 In X3 + ------- )

b) molar excess Gibbs energy of mixing

Ni = chemical potential of gas

fi = Fugacity

N°i = Chemical potential of gas when Fugacity = 1

ΔG = RT In ( a2 / a1 )  

Answer:

0.13653499904751903

Explanation:

Convert Units .com

Answer:

1: b

2: in the article it says that the benefits from the drug outweigh the costs, so it think it is effective.

Answer:

10.67 moles is the answers.hope it helped

Answer:

ik ppl sy no links but https://courses.lumenlearning.com/cheminter/chapter/the-ph-scale/

Explanation: it should help you