Which of the following best describes the structure of a protein?

a
Carbon ring(s)
b
Hydrocarbon(s)
c
Single or double helix
d
Globular or fibrous

Answer:

Denver CO your weclome:)

First, we must know: 1 pound = 1 lb = 453.592 g

1 mole CO2 = 44.0 g = 6.02x10^23 molecules CO2

44.0 g CO2 ------- 6.02x10^23 molecules CO2

X ------- 8.65 x 10^20 molecules of CO2

X = 0.0632 g CO2

Now, we need pounds, not g ===> 0.0632 g CO2 x (1 pound/453.592 g) = 1.39x10^-4 pounds.

Answer: 1.39x10^-4 pounds

Answer:

False; An oxidation-reduction is any chemical process that involves any chemical process in which elements undergo changes in oxidation number. hope that helps love!

Answer:

0.32 grams

Explanation:

To go from moles to grams (I assume you meant mass instead of weight) you start by finding the molar mass. For O2, the molar mass is 32, because there are two oxygen atoms so 16 grams multiplied by 2.

After that, you take your given moles and multiply it by the grams per mole. The moles cancel each other out and you get your value in grams. I have attached my work below.

Hope this helps! :^)

Answer:

47900 cm

General Formulas and Concepts:

Chemistry

Explanation:

Step 1: Define

0.479 km

Step 2: Identify Conversions

1 km = 1000 m

1 m = 100 cm

Step 3: Convert

\(0.479 \ km(\frac{1000 \ m}{1 \ km} )(\frac{100 \ cm}{1 \ m} )\) = 47900. cm

Step 4: Check

We are given 3 sig figs. Follow sig fig rules.

47900. cm ≈ 47900 cm

Answer:

strawberry blueberry raspberry walang compound at element

Answer:

The concentration of the nitric acid (HNO3) solution is 72 M.

Explanation:

To determine the concentration of the nitric acid solution, we can use the concept of stoichiometry and the equation of the neutralization reaction between nitric acid (HNO3) and sodium hydroxide (NaOH):

HNO3 + NaOH → NaNO3 + H2O

The balanced equation shows that the molar ratio between HNO3 and NaOH is 1:1. This means that 1 mole of HNO3 reacts with 1 mole of NaOH.

Given:

Volume of HNO3 solution = 10.0 ml

Volume of NaOH solution = 3.6 ml

Molarity of NaOH solution = 0.2 M

To find the concentration of the HNO3 solution, we need to calculate the number of moles of NaOH used in the neutralization reaction:

moles of NaOH = volume of NaOH solution * molarity of NaOH solution

= 3.6 ml * 0.2 M

= 0.72 mmol (millimoles)

Since the molar ratio between HNO3 and NaOH is 1:1, the number of moles of HNO3 in the solution is also 0.72 mmol.

Now, we can calculate the concentration of the HNO3 solution using the formula:

concentration (in M) = moles of solute / volume of solution (in L)

concentration = 0.72 mmol / 0.010 L

= 72 mmol/L

= 72 M

Therefore, the concentration of the nitric acid (HNO3) solution is 72 M.

Answer:

Molar mass of Z in solution A is 148.2 g/mol.

Explanation:

To solve this, we need to use colligative property about vapor pressure.

In any ideal solution, the vapor pressure of solution is lower than vapor pressure of pure solvent. Formula is:

ΔP = P° . Xm

ΔP = Vapor pressure of pure solvent - Vapor pressure of solution

At the normal boiling point of water (100°C), vapor pressure is 760 mmHg.

Let's replace in the formula, to find out Xm (mole fraction of solute)

760 mmHg - 754.5 mmHg = 760 mmHg . Xm

(760 mmHg - 754.5 mmHg) / 760 mmHg = Xm

Xm → 0.00724

Mole fraction of solute = moles of solute /total moles (st + sv)

In this case, our mole fraction will be

(6 g / MM) / ( (6 g/ MM + 100 g / 18g/mol) = 0.00724

Our unknown is MM (molar mass of Z). We solve the equation:

6 g / MM = 0.00724 . ((6 g/ MM + 100 g / 18g/mol))

6 g / MM =  0.04344 g /MM + 0.0402 g/mol

6 g/MM - 0.04344 g /MM = 0.0402 g/mol

5.95656 /MM = 0.0402 g/mol

5.95656 / 0.0402 g/mol = MM → 148.2 g/mol

The molar mass of Z in solution A is 150 g/mol.

Based on the given information,

• The mass of water given is 100 grams.

• The mass of solute given is 6 grams.

• It is known that the molar mass of water is 18 gram per mole.  

Now the moles of water can be calculated as,

\(n = \frac{mass}{molar mass}\)

Now putting the values we get,

\(n = \frac{100 g}{18 g/mol} \\n = 5.5556 moles\)

• It is known that the vapor pressure of water at 100 degree C (Po) is 760 mmHg.

• The given vapor pressure of solution at 100 degree C is 754.5 mmHg.

• Based on Raoult's law, the vapor pressure of solution = mole fraction of water * Po of water.

The mole fraction of water is,

\(= \frac{754.5 mmHg}{760 mmHg} \\= 0.9928\)

The mole fraction of solute is,

\(= 1-0.9928\\= 0.00722\)

The mole fraction of solute = n1/n1+n2

Now putting the values we get,

\(\frac{n1}{n1+n2} = 0.00722\\\frac{n1+n2}{n1} = \frac{1}{0.00722} \\\)

\(\frac{n1+5.56 mol}{n1} = 138.50\\n1 = \frac{5.56 mol}{138.50} \\n1 = 0.040 mol\)

Now the molar mass of solute, Z is,

\(Molar mass = \frac{mass}{moles} \\Molar mass = \frac{6.0 grams}{0.04 mol} \\Molar mass = 150 g/mol\)

Thus, the molar mass of Z in solution A is 150 g/mol.

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Here option 2 is correct ^H = +48 kJ, AS = +135 J/K at 400 K for a reaction to be spontaneous.

What is a spontaneous reaction ?

A spontaneous reaction is one that favors the creation of products under the reaction's current conditions. A bonfire that is raging and exothermic is an illustration of a spontaneous reaction (there is a decrease in the energy of the system as energy is released to the surroundings as heat)

If both ΔH0 and ΔS0 are positive then reaction will be spontaneous at high temperature

Here option 2 is correct ^H = +48 kJ, AS = +135 J/K at 400 K for a reaction to be spontaneous.

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The reaction of -COOH and -NH₂ creates a peptide bond.

Peptide bond is defined as a type of amide type covalent chemical bond which is formed between the two simultaneous molecules of amino acid in such a way that carboxyl group of one molecule of amino acid get attached to the NH₂ group of another molecules of Amino acid.

Peptide bond is formed by the elimination of water molecules.

The hydroxyl group from the carboxyl and proton hydrogen cation from NH₂ group.

Thus, we concluded that the reaction of -COOH and -NH₂ creates a peptide bond by losing—OH from the -COOH and H+ from the -NH₂.

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Answer:

Explanation:

When potassium chloride reacts with lead acetate in aqueous medium, it gives white precipitate of lead chloride and potassium acetate in aqueous medium as a product.

As shown in chemical reaction given below:

The balanced chemical equation is Hg₂(C₂H₃O₂)₂ + 2KCl → Hg₂Cl₂ + 2KC₂H₃O₂

The equation in which the number of atoms of all the molecules is equal on both sides of the equation is known as a balanced chemical equation.

for example the chemical formula of salt is is NaCl. That would be considered balanced, because the amount of sodium and the amount of chlorine is the same

In the given reaction :

Hg₂(C₂H₃O₂)₂(aq)  + KI(aq)   →   Hg₂I₂(s)  +  KC₂H₃O₂(aq)

there must be two acetates  in product side  so first balance acetates

Hg₂(C₂H₃O₂)₂(aq)  + KI(aq)   →   Hg₂I₂(s)  +  2KC₂H₃O₂(aq)

two potassium and two iodines  must present reactant side  so add  2  before  KI  we get balanced reaction

Hg₂(C₂H₃O₂)₂ + 2KCl → Hg₂Cl₂ + 2KC₂H₃O₂

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To name Type 2 ionic compounds such as AuCl₃, you need to use the Stock system or Roman numeral system to indicate the oxidation state of the cation. Some steps are; Identify the cation, Determine the charge, Write the name, and combine two names.

Here are the steps to name AuCl₃; Identify the cation and anion. In this case, the cation is Au³⁺ and the anion is Cl⁻.

Determine the charge on the cation by using the anion's charge and balancing the charges to zero. Since Cl⁻ has a charge of -1 and there are three Cl⁻ ions in the compound, the total negative charge is -3. Therefore, the Au³⁺ ion has a charge of +3.

Write the name of the cation first, followed by the name of the anion with an -ide ending. Since the cation is Au³⁺, we use the name "gold(III)" to indicate the oxidation state of +3. The anion is Cl⁻, so we add the -ide ending to get "chloride".

Combine the two names to get the compound's name: "gold(III) chloride".

Therefore, the name of the Type 2 ionic compound AuCl₃ is "gold(III) chloride".

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The pressure inside the container will become 0.71 atm if the piston is moved to the 1.40 L

To obtain the pressure inside the container, we'll begin by listing out the given parameters from the question. This is given below:

Since the temperature is constant, we can determine the pressure inside the container by using the Boyle's law equation as illustrated below:

P₁V₁ = P₂V₂

1.00 × 1.00 = P₂ × 1.40

1 = P₂ × 1.40

Divide both sides by 1.40

P₂ = 1 / 1.40

P₂ = 0.71 atm

Thus, from the calculation made above, we can conclude that the pressure inside the container is 0.71 atm

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Answer:

that one or more new substances are produced. Temperature Changes Chemical reactions can release energy or absorb energy.

Explanation:       .

e. The radius of the metal cylinder is 1.27 cm / 2 = 0.635 cm.

f. The volume of the metal cylinder is 4.745 cm³

g. The density of the metal cylinder is 7.53 g/cm³

Data given:

b. Mass of metal cylinder: 35.732 g

c. Length of metal cylinder: 3.15 cm

d. Diameter of metal cylinder: 1.27 cm

e. Radius of metal cylinder: The radius (r) of a cylinder is half of its diameter. Therefore, the radius of the metal cylinder is 1.27 cm / 2 = 0.635 cm.

To calculate the volume (V) of the metal cylinder;

V = πr²h, where π is approximately 3.14159, r is the radius, and h is the height (length) of the cylinder.

Volume of metal cylinder:

V = 3.14159 * (0.635 cm)² * 3.15 cm = 4.745 cm³

Density of metal cylinder:

Density (ρ) is defined as mass (m) divided by volume (V). Therefore, the density of the metal cylinder is ρ = 35.732 g / 4.745 cm³ = 7.53 g/cm³ (rounded to two decimal places).

So, the radius of the metal cylinder is 0.635 cm, the volume is 4.745 cm³, and the density is 7.53 g/cm³.

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The statement "increasing the force will increase the moment" is true.

This is because the moment is a measure of the turning effect of a force on an object about a pivot point. It is defined as the product of the force and the perpendicular distance between the force and the pivot point. The unit of moment is the newton-meter (Nm) or the joule (J).When a force is applied to an object, it will produce a moment about the pivot point if the force is not acting along the same line as the pivot point. The magnitude of the moment depends on the force applied and the distance of the force from the pivot point. As the force increases, the moment also increases, provided that the distance from the pivot point remains constant. Conversely, if the force remains constant, but the distance from the pivot point increases, the moment also increases. This is because the perpendicular distance is directly proportional to the moment, meaning that a longer distance results in a larger moment.Therefore, it can be concluded that increasing the force applied to an object will increase the moment produced about a pivot point.

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The correct option is B. CaBr2 + 2Na → 2NaBr + Ca because In option B, the reactants CaBr2 and Na are both metals with similar reactivities.

Exothermic reactions release energy and are defined as producing products with higher stability (lower energy) than the reactants. The exothermic reaction that happens during a fire and releases energy in the form of heat and light is the combustion reaction.

In terms of reactivity, the metals that are listed in the periodic table's lower left corner are the most active. Lithium, sodium, and potassium, for instance, all interact with water.

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Question:

Based on the reactivities of the elements involved, which reaction will form products that are more stable than the reactants?

A. 2AlBr3 + 3Zn → 3ZnBr2 + 2Al

B. CaBr2 + 2Na → 2NaBr + Ca

C. MgBr2 + H2 → 2HBr + Mg

D. BaBr2 + Ca → CaBr2 + Ba

E. 2LiBr + Ba → BaBr2 + 2Li

The correct option is 2.

A 88

B 94

C 100

To solve this problem, we need to use our knowledge of how streams flow and how velocity changes in different parts of the stream.

Typically, streams flow fastest in the center of the channel and slowest along the edges, due to friction with the banks and bottom of the stream.

Given that it lies in the middle of the stream's two extreme velocities, option 2, which equals 94, is probably the right response. The velocity near the channel's middle is probably closer to 100 because the stream runs there the quickest.

On the other hand, it is likely that the velocity near the edges is closer to 88 since the stream runs more slowly along the edges due to friction with the banks and streambed. Consequently, a velocity of 94 is the most logical choice because it is within the range that is  predicted by the velocity distribution of a stream.

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Answer:

What??????

Explanation:

The kinetic theory of matter states that all matter is made up of minute particles with space in between them that move randomly. The theory is based on the fact that matter is composed of small particles.

Based on the atoms of an ideal gas, KMT has five hypotheses:

1. Gases are made up of several molecules moving randomly and constantly in linear motion.

2. The volume of all the molecules is dwarfed by the volume of the gas as a whole.

3. Intermolecular forces are negligible.

4. The average kinetic energy of every molecule in the gas stays constant as long as the temperature stays constant. Molecular collisions are therefore entirely elastic.

5. The average kinetic energy of all molecules in a gas depends on its absolute temperature. This shows that at any temperature, gas molecules in equilibrium have the same average kinetic energy (but NOT the same velocity and mass).

The kinetic-molecular theory, a theory that characterizes the states of matter, is based on the presumption that matter is composed of small particles that are constantly in motion. The theory clarifies observed properties and behaviors of gases, liquids, and solids.

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1.34 × 10³μg /ML is equivalent to 1.34 × 10⁹ mg/pL. Details about how to convert micrograms to milligrams can be found below.

Micrograms is a unit of mass equal to one millionth of a gram, or 0.000001 grams. It is denoted by the symbol μg.

Milligrams is equivalent to one thousandth of a gram.

Also, millilitre (mL) is a unit of measure of capacity, being one thousandth of a litre while picoliters is one millionth of a microlitre i.e. 10-¹² litres.

The conversion factor of μg/mL to mg/mL is as follows:

1 microgram/millilitre = 0.001 milligram/millilitre

1.34 × 10³μg/mL = 1.34mg/mL

The conversion factor of mg/mL to mg/pL is as follows:

1 millilitre = 1000000000 picolitres

1.34 mg/mL = 1.34 × 10⁹ mg/pL

Therefore, 1.34 × 10³μg /ML is equivalent to 1.34 × 10⁹ mg/pL.

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Answer:

Explanation:

a ) silver chloride AgCl and lead chloride PbCl₂  Hg₂Cl₂ ,  are not dissolved in ware

so Ag⁺ and Pb⁺² Hg₂ ⁺² will precipitate out .

b ) BaSO₄ , SrSO₄  are insoluble

Ba⁺² and Sr⁺² will precipitate out .

c )

Al₂( CO₃)₃ ,  Fe₂(CO₃)₃  , CuCO₃ insoluble .

Al⁺³ and Fe⁺³ and Cu⁺² will be insoluble .

d )  

2Fe⁺³(aq) + 3CO₃⁻²(aq) = Fe₂(CO₃)₃ (s)

The observation that compound A releases H2 gas while compound B does not when treated with Na metal can be explained by considering the structural differences between the two compounds and their ability to undergo specific reactions.

Compound A and compound B both have the molecular formula C₂H₆O, which indicates that they both contain two carbon atoms, six hydrogen atoms, and one oxygen atom. However, the difference lies in the arrangement of these atoms within the molecules. One possible explanation for the observed difference is that compound A is an alcohol, specifically ethanol (CH₃CH₂OH), while compound B is an ether, such as dimethyl ether (CH₃OCH₃). The presence of the hydroxyl group (-OH) in ethanol enables it to undergo a reaction with sodium metal, known as the metal-acid reaction. In this reaction, the metal displaces the hydrogen from the hydroxyl group, forming sodium ethoxide (CH₃CH₂ONa) and releasing hydrogen gas (H₂). On the other hand, ethers like dimethyl ether lack the hydroxyl group and therefore cannot undergo the metal-acid reaction. Consequently, when compound B is treated with sodium metal, no hydrogen gas is released. The ability of compound A to release hydrogen gas while compound B does not when treated with sodium metal can be attributed to the presence of a hydroxyl group in compound A (ethanol), enabling it to undergo a metal-acid reaction, whereas compound B (dimethyl ether) lacks the necessary functional group and thus does not undergo this reaction.

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Answer:

One mole of cadmium (6multiply1023 atoms) has a mass of 112 grams, as shown in the periodic table on the inside front cover of the textbook. The density of cadmium is 8.65 grams/cm3.

Explanation:

Answer:

Second Option ([O2]*[NO]^2)/[NO2]^2

Explanation:

To find the Kc value of a reaction, you must divide the concentration of the products over the concentration of the reactants (divide right side of the reaction by the left side of the reaction)

you must also remember to turn the multiplier prefix such as the '2' in the 2NO into an exponent for that particular molecule in the Kc equation

as such, the second option is correct

The answer would be \(2.79\) × \(10^{5}\ ml\).

When you have a big number and have to make it smaller, the exponent will be positive therefore \(10^{5}\) and always remember that you have to round. It asks for 3 significant figures so you look at the last digit you need, which is 8, and then look to the right of it to see if you will need to round up or down. Since the number to its right is a 6, that means that you have to round up therefore the answer is \(2.79\) instead of \(2.78\).

The balanced nuclear equation for the beta decay of 234/90Th can be represented as follows: ^234/90Th --> ^234/91Pa + e^0/-1β

In this equation, the nucleus of thorium-234 (234/90Th) undergoes beta decay. During beta decay, a neutron within the nucleus is converted into a proton, resulting in the emission of an electron (beta particle). As a result, the thorium-234 nucleus is transformed into protactinium-234 (234/91Pa) by gaining one proton.

The beta particle emitted during the decay process is represented as e^0/-1β, where the superscript 0 denotes that the electron has no charge (neutral), and the subscript -1 indicates that the electron carries a negative charge of -1.

It is important to note that in a nuclear equation, the total atomic mass and atomic number on both sides of the equation must be equal to maintain a balanced equation and conserve mass and charge.

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The first image shows cleavage, same as the second. The third image shows fracture

1. Image 1:

2. Image 2

Image 3:

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Answer: a

. dissolving it in water

Explanation:

When the unknown material is dissolved in water, it could react with the water particles and end up producing another material. For instance an alkali metal in water could form metal oxides.

Heating the material until it melts will not change it into another material because it will still be the same material only now it will be in liquid form. The same logic applies if it is burnt in a flame.