Calculate the density of argon gas at a pressure of 753 mmHg and a temperature of 35 °C

Answers

Answer 1

Answer:

The density of Argon gas at a pressure of 753 mmHg and a temperature of 35 °C is equal to 1.59 g/L.

What is the ideal gas equation?

The state of a quantity of gas is calculated by its pressure, volume, and temperature. The ideal gas law can be explained as the product of the volume and pressure of gas is equal to the multiplication of the universal gas constant and absolute temperature.

The mathematical equation for an ideal gas can be written as follows:

PV = nRT

PV =(m/M) RT

PM/RT = m/V

d = PM/RT

Where n is the moles of gas, T is the temperature of the gas, V is the volume of the gas, and R is the gas constant.

Given, the temperature of argon gas, T = 35 °C = 35 +273 = 308 K

The pressure of the argon gas, P = 753 mmHg = 1.01 atm

The molar mass of the Argon gas, M = 40 g/mol

Substitute V, R, P, and T in the ideal gas equation, we get:

The density of Argon gas, d = PM/RT

d= 1.01 ×40/(0.082 × 308)

d = 1.59 g/L

Therefore, the density of Ar gas is 1.59 g/L.

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Answer 2

Answer: PV=nRT
PV= (m/M)RT
PM=(m/v)RT
PM =dRT
d= (PM) ÷(RT)

substitute the the given data to the above equation. d-density, p-pressure, M- molar mass of argon gas, T- temperature. and R is a constant. make sure to substitute its value too.. :)

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An unknown substance turns blue litmus paper to red. Which additional test could be used to confirm the substance’s identity? It should turn phenolphthalein from colorless to pink because it is a base. It should turn phenolphthalein from pink to colorless because it is a base. It should turn methyl orange to orange because it is an acid. It should turn methyl orange to red because it is an acid.

Answers

The substance that turns blue litmus red should turn methyl orange to red because it is an acid.

What is an acid?

An acid is a substance that produces hydrogen ions as the only positive ions when dissolved in water.

Properties of acid include :

acids turn blue litmus red
are corrosive
are sour in taste

Therefore, the substance that turns blue litmus red is an acid:

It should turn methyl orange to red because it is an acid.

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Blue litmus paper turning red means that the solution where the litmus paper was submerged is an acidic solution with a pH of less than 7. Another verification of the nature of the solution is the turning to red of methyl orange in acidic solutions. The answer then is D.

Why does it make sense that if an atom loses electrons, it is left with a pisitive charage?

Answers

Because atoms are neutral. By neutral, I mean that; there are three main particles that make up an atom. Protons, Electrons and Neutrons. Protons have (electrically) positive charge, electrons have negative and neutrons are electrically neutral. One proton's charge is +1 and one electron's charge is -1. An atom (normally) has the same amount of protons and electrons. Let's say if an atom has two protons and two electrons, the sum of electrical charges of the protons is (two times +1) +2 and sum of electrical charge of electrons is (two times -1) -2 . The total charge of the atom is the sum these. So, (-2)+(2)= 0. That makes the charge of the atom 0, thus makes it neutral. But let's say this atom loses one of its electrons, and now has only one. So one electron (-1) and two protons (+2) in total will be : (-1)+(2) = +1 . +1 is positive, so this makes the charge of the atom positive.

Electrons have a net negative charge, therefore by losing them the atom will become slightly more positive.

If the nucleus was the size of a tennis ball the atom would be the size of....?

Answers

If the nucleus was the size of a tennis ball, the atom would be the size of a sphere about 1,450 feet in diameter.

The size of one atom would be comparable to one of the world's largest sports stadiums if the nucleus were the size of a tennis ball, or around 1,450 feet in circumference.

There are protons, neutrons, and electrons, three types of subatomic particles. Protons and electrons, two of the subatomic particles, each carry an electrical charge of one or the other.

Electrically charged protons and electrically neutral neutrons make up atomic nuclei. The strongest basic force known to science, often known as the strong force, holds these things together.

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If you could find anything just bigger than a tennis ball, you're all good, because the nucleus is almost half the size of the atom, I think! U should find this helpful, if you do, great, I'm glad that I ciyld help

Which compound would most likely turn litmus paper to a red color?a. CH₃CH₂CH₂OH
b. CH₃CH(Br)CH(Br)CH₃
c. CH₃CH₂CH(Br)CH₃
d. CH₃CH₂CH₂COOH
e. CH₃CH₂CH₂CH₃

Answers

answer D, because it's acid

Which equation represents a decomposition reaction?(1) CaCO3(s) ==>CaO(s) + CO2(g)
(2) Cu(s) + 2AgNO3(aq) ==>2Ag(s) + Cu(NO3)2(aq)
(3) 2H2(g) + O2(g) ==>2H2O(l)
(4) KOH(aq) + HCl(aq) ==>KCl(aq) + H2O(l)

Answers

Answer : The correct option is, (1)

Explanation :

The option (1) reaction is an example of decomposition reaction because in this reaction the larger compound, calcium carbonate decomposes into smaller molecule, calcium oxide and carbon dioxide.

Decomposition reaction : It is a type of reaction in which a larger compound decomposes into a smaller molecule or elements.

$AB\rightarrow A+B$

The option (2) reaction is an example of single displacement reaction because in this reaction the most reactive metal, copper displace the less reaction metal, silver.

The option (3) reaction is an example of combination reaction because in this reaction two reactants, hydrogen and oxygen react to give a single product as water.

The option (4) reaction is an example of double displacement reaction because in this reaction a positive cation and a negative anion of two reactants exchange their places to give two new products.

Hence, the correct option is, (1)

Answer (1 )

CaCO3(s) ==>CaO(s) + CO2(g)

hope this helps!.

Which physical changes are endothermic?(1) melting and freezing
(2) melting and evaporating
(3) condensation and sublimation
(4) condensation and deposition

Answers

Melting and evaporating are endothermic.

Melting and evaporating are the physical changes that are endothermic. Therefore, the correct option is option 2.

Physical modifications are those that modify a chemical substance's shape yet do not affect its chemical content. Physical changes may normally be utilised to separate compounds to chemical elements and simpler compounds, but they cannot be utilised for separate mixtures to their individual components. When something changes physically but not chemically, it is said to have undergone a physical transformation. This contrasts to the idea of a chemical change, when a material's composition changes or a substance or substances mix or separate to generate new compounds. Melting and evaporating are the physical changes that are endothermic.

Therefore, the correct option is option 2.

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