If a 12 fl. Oz. Beer has a 12% abv, how many servings of alcohol is that?.

Answer:

D

Explanation:

The area of a shape is the amount of space a 2-dimensional shape covers. It's measured in units squared (units²). So, the answer is D.

If you want to change the mass of your atom by 1 or more mass units, you can either? Add a proton and Add a neutron.

Explanation:

Option A and Option B is your answers.

To change the mass of your atom by more mass units ; you can add a proton or add a neutron ( A and B )

The nucleus of an atom is composed of a neutron and a proton while the outer shell of an atom comprises of the electrons.

The mass of an atom is dependent on the mass of the nucleus of the atom therefore to increase the mass of the atom by any number of mass units you can either add a proton or a neutron to the nucleus of the cell.

Hence we can conclude that to change the mass of your atom you can add a proton or add a neutron to the nucleus of the atom

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The empirical formula of lysine is C₆H₁₄N₂.

By calculating the smallest whole number ratio from the mass percentages of a compound's constituent parts, it is possible to calculate its empirical formula.

We must first establish how many moles of each element are included in 1.50 g of lysine in order to determine the empirical formula for lysine. The mole ratios of the elements may then be calculated using these values and will match the ratio of the subscripts in the empirical formula.

We may determine how many moles of carbon and hydrogen are contained in 1.50 g of lysine by computing the mass of generated CO₂ and H₂O.

Moles of C = 2.72 g CO₂ x (1 mol CO₂ / 44.01 g CO₂) = 0.062 moles

Moles of H = 1.29 g H₂O x (2 moles H / 18.02 g H₂O) = 0.143 moles

Secondly, by being aware that lysine also generated 0.287 g of N. We can determine how many moles of N there are.

moles of N = 0.287 g N x (1 mole N / 28.02 g N) = 0.0102 moles

By dividing each element by the minimum number of moles, which is 0.0102 moles, we can now determine the ratio of the elements.

C = 0.062 moles / 0.0102 moles = 6

H = 0.12 moles / 0.0102 moles = 14

N = 0.0102 moles / 0.0102 moles = 1

Therefore, the empirical formula of lysine is C₆H₁₄N₂

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The correct order of acid strengths (largest to smallest) is: 4) HNO₃ > HCIO₂ > HBrO > HCIO

The  acid strength of an acid is determined by its ability to donate a hydrogen ion (H+). The more readily an acid donates its hydrogen ion (H+ ion), the stronger it is.

In option 1, HCIO is listed as the strongest acid, but this is incorrect. HNO₃ is a stronger acid than HCIO.

In option 2, HBrO is listed as the strongest acid, but this is also incorrect. HNO₃ is still the strongest acid.

Option 3 has HCIO listed as a stronger acid than HBrO, which is incorrect. HBrO is a stronger acid than HCIO.

Option 5 has HClO₂ listed as the strongest acid, which is also incorrect. HNO₃ is still the strongest acid.

Therefore, option 4 is the correct order of acid strengths, with HNO₃ being the strongest acid, followed by HCIO₂, HBrO, and HCIO in decreasing order of strength.

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Answer:

b. 6.02 x 1023 molecules

Explanation:

The formula mass of ammonia is 14 + 1 × 3 = 17.

The number of moles in 27.6g ammonia is 27.6 ÷ 17 = 1.62 mol.

A mole is 6.02 × 10²³, so the number of hydrogen atoms in a 1.62 moles of ammonia is 1.62 × 6.02 × 10²³ × 3 = 2.93 × 10² atoms.

Answer:

I'm pretty sure is a mixture

Answer:

Very fast

Explanation:

Due to elasticity, a bar of lead is more easily bent than a bar of aluminum of the same size.

A bar of lead is more easily bent than a bar of aluminum of the same size because of its less hardness and elasticity. If an object is more elastic, it will bent easily while on the other hand, if an object have less elasticity then it can't be bend. Elasticity is the ability of a body to return to its original shape and size when the forces that are causing the deformation are removed from it.

So we can conclude that due to elasticity, a bar of lead is more easily bent than a bar of aluminum of the same size.

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If large amounts of sulfate are present during methane production, the contaminant that may accompany methane production is hydrogen sulfide (H2S).

If large amounts of sulfate are present during methane production, the contaminant that may accompany methane production is hydrogen sulfide (H2S).

Sulfate-reducing bacteria (SRB) can convert sulfate to hydrogen sulfide during the anaerobic decomposition of organic matter in the presence of methane-producing bacteria. This process is known as anaerobic sulfate reduction, and it is commonly used in the production of biogas (which is mainly composed of methane). However, the presence of hydrogen sulfide in biogas can be problematic as it is toxic, corrosive, and can cause odor issues.

Therefore , biogas producers  often take steps to remove hydrogen sulfide from the biogas before it is used or sold.

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Answer:

V = 25.7 L

Explanation:

To find the volume of Argon (Ar), you need to use the Ideal Gas Law equation. This looks like:

PV = nRT

In this formula,

        > P = pressure (atm)

        > V = volume (L)

        > n = number of moles

        > R = constant (0.0821 L*atm/K*mol)

        > T = temperature (K)

While there is a different constant that can be used if you want to keep the pressure in mmHg, there is a more common constant used when the pressure is in atm. So, to find the volume, you need to (1) convert mmHg to atm (by dividing by 760) and then (2) calculate the volume (using Ideal Gas Law).

(Step 1)

600 mm Hg              1 atm
-------------------  x  ---------------------  =  0.789 atm
                              760 mm Hg

(Step 2)

PV = nRT

(0.789 atm) x V = (0.825 mole)(0.0821 L*atm/K*mol)(300 K)

(0.789 atm) x V = 20.32

V = 25.7 L

Surface tension increases by increasing the intermolecular forces.

The following information should be considered -

What increases the surface tension?

What increases with increasing intermolecular forces?

Higher its boiling point. The harder it is for a liquid to escape into the vapor phase, the more energy is required to do so, and the higher the intermolecular forces between the liquid particles.

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The milligrams of the gas are formed if 10.0ml of 3.00% hydrogen peroxide solution decomposes, The density of the solution is 1.00 g/mL is 300 mg.

The equation is as follows :

2H₂O₂(l)   ---->   2H₂O(l)   +   O₂(g)

The density of the solution = 1 g/mL

The volume of the water = 100 mL

The volume of the H₂O₂ = 10 mL

The mass of the hydrogen peroxide = 3 g

2 moles of the hydrogen peroxide produces the 1 mole of the oxygen gas.

The mass of the O₂ =   (10 mL × 3 g of H₂O₂ ) / 100 mL

                                = 0.3 g = 300 mg

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55.44 K is the temperature that need to change in order for the neon gas to be 39.0% faster than the RMS speed of the argon.

Given

RMS speed of argon = 1.20 km/sec = 1.20 ×\(10^{3}\) m/sec

RMS speed of neon = 39% faster than the speed of argon

                                 = RMS speed of argon + \(\frac{39}{100}\) RMS speed of argon

                                 = RMS speed of argon ( 1 +0.39)

RMS speed of neon = 1.39 times of RMS speed of argon

Hence   \(\frac{v_{ne} }{v_{ar} } = \frac{1.39}{1}\) … (1)

The atomic mass of argon is 39.95 g/mol = 39.95×\(10^{-3}\) Kg/mol

and  the atomic mass of neon is 20.18 g/mol = 20.18 ×\(10^{-3}\) Kg/mol

According to the formula of root-mean-square velocities of gas molecules

\(v_{rms} = \sqrt{3RT/M}\) where,

\(v_{rms}\) = root-mean-square velocity

M = molar mass of gas (in kg per mole)

R = Molar gas constant = 8.314 J/mol/K

T = temperature (in kelvin)

\(v_{arg }\) = \(\sqrt{3RT_{arg}/M }\)

\(v_{arg} ^{2}\) = \(3RT_{arg} /M\)

1.20 ×1.20 ×\(10^{6\\\) = 3 ×8.314×\(T_{arg}\) /39.95 ×\(10^{-3}\)

\(T_{arg}\) = 1.44 × 39.95 ×\(10^{3}\) / 24.942

\(T_{arg}\) = 2306.47 K

Now,

RMS velocity is directly proportional to \(\sqrt{T}\) and inversely proportional to \(\sqrt{M}\)

\(v_{rms}\) \(\alpha\) \(\sqrt{T}\)   and  \(v_{rms} \frac{1}{\alpha } \sqrt{M}\)

\(\frac{v_{ne} }{v_{ar} }\) =  \(\sqrt{\frac{T_{ne} }{T_{ar} } }\)× \(\sqrt{\frac{M_{ar} }{M_{ne} } }\)

According to equation 1

\(\sqrt{\frac{T_{ne} }{T_{ar} } }\) × \(\sqrt{\frac{M_{ar} }{M_{ne} } }\) = 1.39

\(T_{ne}\) = 1.39 ×1.39 × 2306.47 × 20.18 / 39.95

\(T_{ne}\) = 2251.03K

Change in temp ΔT = 2306.47-2251.03= 55.44 K

Hence, 55.44 K is the temperature that need to change in order for the neon gas to be 39.0% faster than the RMS speed of the argon.

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The number of moles of HCl produced along with the 2.9 moles of H₃PO₄ is 14.5 moles

From the question, we are to determine the number of moles of HCl that are produced along with 2.9 moles of H₃PO₄

The given balanced chemical equation of the reaction is

PCI₅ + 4H₂O ---> H₃PO₄ + 5HCI

From the balanced chemical equation,

1 mole of PCI₅ reacts with 4 moles of H₂O to produce 1 mole of H₃PO₄ and 5 moles of HCI

Now,

If 2.9 moles of H₃PO₄ are produced from the reaction,

Then,

5 × 2.9 moles of HCl will be produced along with the H₃PO₄

5 × 2.9 =  14.5 moles

Hence, the number of moles of HCl produced is 14.5 moles

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The foreign substance responsible for causing an allergic reaction is called an allergen.

The exaggerated reaction of our body’s immune system to certain foreign substances is known as an allergy.

The symptoms of allergy are sneezing, watery eyes, running nose, and difficulty in breathing which occur due to the release of certain chemicals like histamine and serotonin in our body.

The foreign substance that causes allergy is called an allergen.

Common examples of the allergens are pollen grains of certain plants, animal dander, and food items like peanuts, mushrooms etc.

To control the symptoms of allergy, drugs like antihistamines and steroids are used.

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The source of gases for the secondary atmosphere of the earth was Volcanic Eruptions.

The scientist think that the atmosphere today is completely different from what it used to be originally and therefore they call it secondary atmosphere.

Internal volcanic activity or the deposit of debris from comet collisions produce a secondary atmosphere. 

The secondary atmosphere is thought to have formed as a result of the numerous volcanic eruptions that occurred from the start of Earth's early periods.

Although each volcano is unique, they all emit gases such as H₂O, CO₂, SO₂, H₂S, HCl, N₂, NO₂, and others.

These gases are formed due to melting of the Earth's crust.

Volcanic activity  renew the atmosphere's molecules.

These molecules are not the Nitrogen and Oxygen that make up the atmosphere today.

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Answer:

The chemical formula for the ionic compound is

Na3N3

-2832.79 kJ heat is produced by combustion of 125 g of methanol under standard state condition.

The typical enthalpy of methanol combustion,

It implies that:

When methanol is burned, it produces 726.1 kJ of energy.

Methanol's molar mass is 32.04 g/mol.

So,

When methanol is burned, 32.04 g of it produces 726.1 kJ of energy.

When methanol is burned, it produces 726.1/32.04 kJ of energy.

125 g of methanol is released during burning (726.1/32.04)

energy of 125 kJ

kilojoules (kJ) released: 2832.79

The basic aliphatic alcohol and an organic compound, methanol has the chemical formula CH3OH. It has a pronounced alcoholic odor resembling that of ethanol and is a colorless, colorless, light, volatile liquid that is combustible.

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Tin, cobalt, and cadmium metals can be prepared by electrolysis of their aqueous salts, while barium metal cannot be prepared by electrolysis of its aqueous salts.

Tin, cobalt, and cadmium can be prepared by electrolysis of their aqueous salts, hydrogen can be prepared by suitable electrolysis of aqueous magnesium and aluminum salts, but not by electrolysis of aqueous zinc and silver salts, barium metal cannot be prepared by electrolysis of its aqueous salts, lead metal can be prepared by electrolysis of its aqueous salts, nitrogen cannot be prepared by electrolysis of an aqueous nitrate solution, and oxygen can be prepared by suitable electrolysis of aqueous perchlorate, nitrate, and oxide salts.

Electrolysis is a process that uses an electric current to drive a chemical reaction. The electrolysis of aqueous salts of certain metals can produce those metals in their elemental form. However, not all aqueous salts can be electrolyzed to produce their corresponding metals. Similarly, electrolysis can be used to produce hydrogen and oxygen from certain aqueous salts, but not all of them. The ability to electrolyze certain compounds depends on their chemical properties and the conditions under which the electrolysis is performed.

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Answer:

Big bang theory

Explanation:

Our universe began with an explosion of space itself - the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.

Answer:

The Big Bang

Explanation:

The Big Bang was the moment 13.8 billion years ago when the universe began as a tiny, dense, fireball that exploded. Most astronomers use the Big Bang theory to explain how the universe began.

Answer:

a: they're used in saucepan handles 'cause they don't soften when heated and also 'cause they cant be bent easily.

b: thermosetting plastics are bad electricity conductors. they don't get moulded and are also hard and strong.

Answer:

H3PO4: Phosphoric acid

HBr: Hydrobromic acid

HNO3: Nitric acid

The question is incorrect, the correct question is;

Which of the following ground-state electron configurations represents the atom that has the

lowest first-ionization energy?

a) 1s2

b) 1s22s2

c) 1s22s22p6

d) 1s22s22p63s23p1

e) 1s22s22p63s23p3

The correct ground state configuration that represents the atom that has the lowest first ionization energy is 1s² 2s² 2p⁶ 3s² 3p¹.

The first ionization energy is the energy required to remove an electron from the outermost shell of an atom.

Ionization energy decreases down the group as number of shells increases but increases across the period as nuclear charge increase.

As the number of shells increases, the degree of shielding or screening decreases it easier to remove the outermost electron.

The elements whose ground state electronic configurations were shown are;

Helium - 1s²  

Beryllium - 1s² 2s²  

Neon - 1s² 2s² sp⁶  

Aluminum - 1s² 2s² 2p⁶ 3s² 3p¹    

Phosphorus - 1s² 2s² 2p⁶ 3s² 3p³

Aluminium (1s² 2s² 2p⁶ 3s² 3p¹) is a metal so it has the lowest first ionization energy since metals are highly electropositive.

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a) The molar mass of Co is 58.93 g/mol, which means that 1 mole of Co contains 6.022 x \(10^{23}\)  atoms.

Therefore, 1 mol Co has 6.022 x \(10^{23}\) atoms.

b) To find the number of atoms in 0.0052 mol Co, we can use the same conversion factor as in part (a):

0.0052 mol Co x 6.022 x \(10^{23}\)  atoms/mol = 3.129 x \(10^{21}\) atoms

c) First, we need to convert the mass of Co to moles:

17.8 g Co ÷ 58.93 g/mol = 0.302 mol Co

Then, we can use the conversion factor from part (a):

0.302 mol Co x 6.022 x \(10^{23}\)  atoms/mol = 1.82 x \(10^{23}\)  atoms

Q2.

a) The molar mass of Co(NO3)2 is 182.89 g/mol, which means that 1 mole of \(Co(NO_{3} )_2\)  contains 6.022 x \(10^{23}\)  molecules.

Therefore, we can use the following conversion factor:

3.604 x \(10^{24}\)molecules \(Co(NO_{3} )_2\)  x 1 mol/6.022 x \(10^{23}\)molecules = 5.99 mol \(Co(NO_{3} )_2\)

b) We can use the molar mass of \(Co(NO_{3} )_2\) to convert from molecules to grams:

2.55 x \(10^{21}\)  molecules \(Co(NO_{3} )_2\) x 182.89 g/mol ÷ 6.022 x \(10^{23}\)molecules/mol = 7.74 x \(10^{-3}\) g \(Co(NO_{3} )_2\)

Q3.

The density of water is 1.00 g/mL, which means that 1 liter of water has a mass of 1000 g.

The molar mass of water is 18.02 g/mol, which means that 1 mole of water contains 6.022 x \(10^{23}\) molecules.

Therefore, we can use the following conversion factor:

1000 g \(H_{2} O\) x 1 mol/18.02 g x 6.022 x \(10^{23}\) molecules/mol = 3.34 x \(10^{25}\) molecules

Q4.

The molar mass of HgO is 216.59 g/mol, which means that 1 mole of HgO produces 1 mole of O2.

Therefore, we can use the following conversion factor:

3.55 g O2 x 1 mol/32.00 g x 2 mol HgO/1 mol O2 x 216.59 g/mol = 15.1 g HgO

Q5.

The balanced equation shows that 1 mole of \(AgNO_{3}\)  reacts with 3 moles of Ag. The molar mass of \(AgNO_{3}\) is 169.87 g/mol, which means that 1 mole of AgNO3 contains 107.87 g of Ag.

Therefore, we can use the following conversion factor:

0.189 g \(AgNO_{3}\) x 1 mol \(AgNO_{3}\) /169.87 g x 3 mol Ag/1 mol \(AgNO_{3}\) x 107.87 g/mol = 0.072 g Ag

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Answer:

Explanation:

Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white.

Hope this helps you

Answer:

\( ZnSO_4 + Li_2CO_3 \longrightarrow ZnCO_3 + Li_2SO_4 \)

Explanation:

Here a reaction is given to us and we need to balance the equation . The given reaction is ,

\( ZnSO_4 + Li_2CO_3 \longrightarrow ZnCO_3 + Li_2SO_4 \)

So here , we can make a table as ,

\(\begin{array}{c|c} \\ LHS & RHS \\\\ Zn = 1 & Zn = 1 \\\\ SO_4 = 1 & SO_4 =1\\\\ Li = 2 & Li= 2 \\\\ CO_3 = 1 & CO_3 = 1 \end{array}\)

We can see that the number of elements and ions is same on both LHS and RHS . Hence the reaction is already balanced .

Therefore the final reaction would be same as before that is ,

\( ZnSO_4 + Li_2CO_3 \longrightarrow ZnCO_3 + Li_2SO_4 \)

I hope this helps .