The chemical formula for glucose, a type of sugar, is C 6H 12O 6. Which statement is true about glucose?

The molecular formula for the provided composition of different elements is C₆H₁₄N₄.

Every time a problem provides you with a compound's molar mass, you can use a little trick to help you determine the compound's molecular mass faster.

More specifically, instead of determining the empirical formula first, then using the molar mass to get the molecular formula, we can skip the empirical formula altogether.

As you know, a compound's molar mass tells we what the mass of one mole of that substance is. In this case, one mole of our compound has a mass of 142.00 g . This means that if we pick a sample of 142.00 g of this compound, w can use its percent composition to get the exact number of moles of each element you get per mole of compound.

So, we know that this compound's percent composition is as follows:

carbon ---> 50.7%

Hydogen ---> 9.9%

Nitrogen ---.> 39.4%

This means that it contains

142 g of compound × 50.7 g of carbon / 100 g of compound = 71.99 g of Carbon

142 g of compound × 9.9 g of hydrogen/ 100 g of compound = 14.05 g of hydrogen

142 g of compound × 39.4 g of nitrogen/ 100 g of compound = 55.94 g of nitrogen

Now all we have to use the molar masses of

hese three elements to determine how many moles of each we get in one mole of our compound.

For carbon (C) : 71.99 g × 1 mole of C / 12.01 g

= 5.99 ~ 6

For Hydrogen (H) : 14.05 g × 1 mole of H / 1.007g

= 13.95 ~ 14

For Nitrogen (N) : 55.94 g × 1 mole of N / 14.006 g

= 3.99 ~ 4

therefore, molecular formula of compound will be C₆H ₁₄N₄ .

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The molarity of the HCl solution is 0.376 M.

To find the molarity of the HCl solution, we need to use the balanced chemical equation for the reaction between calcium hydroxide and hydrochloric acid:

Ca(OH)2 + 2HCl → CaCl2 + 2H2O

From the equation, we can see that 1 mole of Ca(OH)2 reacts with 2 moles of HCl. We can calculate the number of moles of Ca(OH)2 from its mass and molar mass:

moles of Ca(OH)2 = mass / molar mass = 2.10 g / 74.10 g/mol = 0.0284 mol

Since 151 mL of HCl solution completely neutralized the Ca(OH)2, we can use the balanced equation to calculate the number of moles of HCl:

moles of HCl = 2 x moles of Ca(OH)2 = 2 x 0.0284 mol = 0.0568 mol

Now we can calculate the molarity of the HCl solution:

Molarity = moles of solute / volume of solution in liters

Volume of solution = 151 mL = 0.151 L

Molarity = 0.0568 mol / 0.151 L = 0.376 M

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The potential temperature is 15°C.

Given,The temperature of some air is minus 20 degrees C at 95 kPa of pressure.

Reference pressure at sea level = 101.3 kPa

The potential temperature (θ) is the temperature a parcel of dry air would have if it were adiabatically brought to a standard reference pressure, typically 1000 millibars (100 kPa).

Potential temperature is directly proportional to the absolute temperature and inversely proportional to the pressure in a system.

In order to find the potential temperature of the given air, we can use the formula below:

θ = T × (P0 / P)^(R/cp)

where,θ = potential temperature (in Kelvin)

T = temperature (in Kelvin)

P0 = reference pressure (in Pa)

P = actual pressure (in Pa)

R = gas constant for dry air (287 J/(kg·K))

cp = specific heat of dry air at constant pressure (1004 J/(kg·K))

Converting the given temperature in Celsius to Kelvin:

T = -20°C + 273.15K= 253.15K

The formula can be written as:

θ = T × (P0 / P)^(R/cp)θ

= 253.15 × (101300/95000)^(287/1004)θ

= 288.5 K

Converting the potential temperature from Kelvin to Celsius:

θ = 288.5 K - 273.15

= 15.35°C (to the nearest degree)'

= 15°C (rounded off to the nearest degree).

Therefore, the potential temperature is 15°C.

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Answer:

C6H120

Explanation:

atom ratio= 1:2:1 even though it has 6 carbon.

mass ratio=6:1:8

is this what you wanted/needed?

Answer:

1) The number of the listed compounds that have ionic bonds between them are 5 compounds

2) Their formulas showing their charges within the compounds are;

NaCl ↔ Na⁺+Cl⁻

MgO ↔ Mg²⁺+O²⁻

K₂O ↔ 2K⁺+O²⁻

LiF ↔Li⁺+F⁻

CaO ↔ Ca⁺+O²⁻

3) The major reason they were selected is because they are compounds formed by the combination of a metal and a nonmetal

Explanation:

1) An ionic bond involves the transfer of an atoms valence to another atom, such that the ions formed by the ionic chemical bond will be oppositely charged

Therefore, metals, which are elements that mainly have a few electrons in their outermost shell, loses their valence electrons and become positively charged, while non metals, which require a few electrons to complete the stable octet electronic configuration, receive the electrons from the metallic atoms and become negatively charged

Therefore, the compounds formed between a metal and a nonmetal in the list are the the compounds containing ionic bonds, including

NaCl, MgO, K₂O, LiF, and CaO

Therefore, 5 compounds contain ionic bonds between them;

2) Their formulas are;

NaCl, MgO, K₂O, LiF, and CaO

3) The major reason that the chosen compounds contain ionic bonding between them is because they involve the combination of a metal and a nonmetal as follows;

a) NaCl → Na⁺ (metal ion) + Cl⁻(nonmetal ion)

b) MgO → Mg²⁺ (metal ion) + O²⁻(nonmetal ion)

c) K₂O → 2K⁺ (metal ion) + O²⁻(nonmetal ion)

d) LiF → Li⁺ (metal ion) + F⁻(nonmetal ion)

e) CaO → Ca⁺ (metal ion) + O²⁻(nonmetal ion)

DNA contains deoxyribonucleotide triphosphates joined together by phosphodiester-covelent bonds.

The full form of DNA is deoxyribonucleic acid and this is the only one responsible for the heredity transfer from the parent to the offspring as it contains the genetic codes and some characteristics of the parent.

The DNA is bonded by nitrogen base pairs and the phosphodiester-covalent bonds are the backbone of the NDA.

Therefore, DNA contains deoxyribonucleotide triphosphates joined together by phosphodiester-covalent bonds.

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The decay of crystal violet is a first-order reaction, so it does not matter when data collection starts after mixing with sodium hydroxide.

In a first-order reaction, the rate of decay is directly proportional to the concentration of the reactant. The reaction rate is determined by the concentration of the crystal violet, and it decreases exponentially over time. Therefore, regardless of when data collection begins after mixing with sodium hydroxide, the rate of decay remains consistent as long as the concentration of crystal violet is within the measurable range.

This is because the reaction follows a mathematical relationship that allows for accurate determination of the reaction rate and half-life based on the concentration at any given time.

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The complete question-

based on  the decay of crystal violet, explain why it did not matter when you started collecting data after you mixed the crystal violet with the sodium hydroxide?

Answer:

The symbol for an atom can be written to show its mass number at the top, and its atomic number at the bottom. To calculate the numbers of subatomic particles in an atom, use its atomic number and mass number: number of protons = atomic number. number of electrons = atomic number.

Answer:

Public water supply and sanitation in the United Kingdom is characterised by universal access and generally good service quality[citation needed]. A salient feature of the sector in the United Kingdom compared to other developed countries is the diversity of institutional arrangements between the constituting parts of the UK (England and Wales; Scotland; and Northern Ireland), which are each described in separate articles, while this article is devoted to some common issues across the United Kingdom.

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\ \)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{3.612 \times {10}^{24} }{6.02 \times {10}^{23} } \\ \)

We have the final answer as

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The electrical force between these two particles is approximately -2.3 N.

So,the correct answer is (B) -2.3 N

Coulomb’s law is given as:F=ke * q1 * q2 / d^2

Where,F = Force in Newton (N)q1 = Charge on particle 1 in Coulombs (C)q2 = Charge on particle 2 in Coulombs (C)k = Coulomb’s constant = 8.99 × 10^9 N m^2/C^2d = Distance between two particles in meters (m).

Given:e = 1.6 × 10^-19 Ck = 8.99 × 10^9 N m^2/C^2Distance between two particles, d = 10^-14 mAs given, both particles are negative charges; hence, the force between the two particles will be repulsive.

The formula to find the electric force between two negative charges is:F = -ke * q1 * q2 / d^2F = - (8.99 × 10^9 N m^2/C^2) * (1.6 × 10^-19 C) * (1.6 × 10^-19 C) / (10^-14 m)^2= - 2.304 × 10^-9 N= - 2.3 N (approximately).

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The temperature (in °C) that the ideal gas shifted to is -270.38 °C.

Given data:Initial Temperature, T1 = -15.50 °C = 257.65 K

Initial Pressure, P1 = 4.620 atm

Final Pressure, P2 = 8.710 atm

Initial Volume, V1 = 35.00 L

Final Volume, V2 = 15.00 L

We need to calculate the final temperature, T2.

As the gas is assumed to be an ideal gas, we can use the combined gas equation to solve the problem, that is,

P1V1 / T1 = P2V2 / T2

Let's substitute the values,P1V1 / T1 = P2V2 / T2

(i)At initial conditions, P1V1 / T1 = 4.620 × 35.00 / 257.65 = 0.6294

At final conditions, P2V2 / T2 = 8.710 × 15.00 / T2 = 1.742

Now, let's substitute this value in equation (i)0.6294 = 1.742 / T2T2 = 1.742 / 0.6294= 2.77 K or -270.38 °C

Answer:The temperature (in °C) that the ideal gas shifted to is -270.38 °C.

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Answer:

neutron number

Explanation:

^

Answer:

Explanation:

Did u ever get the answer?

If hard water is softened by the ion exchange method, the level of sodium (d) will increase. This is because calcium and magnesium ions in the hard water are replaced with sodium ions during the ion exchange process.

The ion exchange method for softening hard water includes swapping out the calcium and magnesium ions for sodium ions, which raises the concentration of sodium in the water. This procedure has no impact on the levels of dissolved oxygen or iron.

The correct answer is d. sodium. Softening hard water through the ion exchange method involves replacing the calcium and magnesium ions with sodium ions, which results in an increase in the level of sodium in the water. Dissolved oxygen and iron levels are not affected by this process, and P1-1 is not a relevant term for this question.

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In the reaction of aryl halides with NaOH, it is observed that aryl fluoride reacts the slowest with NaOH through nucleophilic aromatic substitution. Among the aryl halides, aryl chloride and aryl bromide react more readily with NaOH by nucleophilic aromatic substitution.

We can conclude that aryl halides react faster with NaOH than aryl fluorides. Additionally, among aryl halides, aryl bromide reacts faster than aryl chloride with NaOH through nucleophilic aromatic substitution. Consequently, aryl bromide is considered the fastest reactant with NaOH. Thus, the answer to the given question is "aryl bromide."

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• Molar mass NH3 ,= Molmass of N + ( 3xmol.mass of H ) = ,17 g/mol

• Molar mass of O2, = 2 x Mol.mass of O = 2*16 = ,32 g/mol

• Mass of NH3 = 7.42 g

The balanced equation of the chemical reaction:

According to stoichemistry ,

• 4 moles of NH3 reacts with 5 moles of O2

• 4x17 g of NH3 reacts with 5x32 g of O2

• then , 7.42 g NH3 reacts with x mass of O2

Answer:

Oxidation state for Mg(s) is 0

Explanation:

This is redox reaction, where one element is oxidized and another is reduced.

H from water is being reduced while the Mg which is in ground state is oxidized.

When the element is reduced, the oxidation state is decreased:

2H⁺ + 2e⁻  ⇄  H₂

When the element is oxidized, the oxidation state is increased

Mg ⇄ Mg²⁺ + 2e⁻

As Mg(s) in the product side, is at ground state, the oxidation state is 0.

Any element in ground state has 0, as oxidation state.

Answer:the plants received more sunlight

Explanation:

Answer:

Examine the units: If the density is 1 g/mL, how many mL do you need to make 250 g?

X mL * 1 g/mL = 250 g

Solve for X

x mL = 250 g / 1 g/mL = 250 mL

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The volume of water = 250 L

\(density = \frac{mass}{volume}\)

Given, density = 1.0 g/L = 0.001 kg/L

           mass = 250 g = 0.25 kg

Putting the values in the equation

\(0.001 = \frac{0.25}{volume}\)

\(volume = \frac{0.25}{0.001}\)

\(volume = 250 L\)

Hence, the volume of the water is 250 L.

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Iron l is said to have a high permeability. High coercivity, high retentivity, and high permeability materials make up the permanent magnets. An object made of a substance that has been magnetized and produces its own persistent magnetic field is referred to as a permanent magnet.

In contrast to an electromagnet, which is made of a coil of the wire wrapped around a ferrous core and needs an electric current to create a magnetic field, a permanent magnet's magnetism is "always on" and it creates its own permeability magnetic field. A common example is a refrigerator magnet used to the keep notes on the door of the refrigerator.

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When depurination of a nucleotide occurs, an apurinic site is created. A nucleotide with an adenine (A) base is typically inserted across from the apurinic site during DNA replication.

When depurination takes place, it refers to the removal of a purine base (adenine or guanine) from a DNA molecule, leaving behind an apurinic site, also known as an "AP site." This occurs when the glycosidic bond between the purine base and the sugar component of the nucleotide is broken. During DNA replication, the apurinic site acts as a gap in the DNA strand that needs to be filled in. The DNA polymerase enzyme recognizes this gap and seeks to insert a nucleotide across from the AP site to restore the DNA sequence. In the case of depurination, a nucleotide with an adenine (A) base is typically inserted opposite the AP site.

This choice of adenine insertion is due to the natural base-pairing rules in DNA. Adenine (A) always pairs with thymine (T) via two hydrogen bonds. Therefore, when the replication machinery encounters an AP site, it adds a thymine (T) to the newly synthesized DNA strand, complementary to the adenine (A) base across from the AP site on the template strand. This ensures the preservation of the original DNA sequence during replication and the maintenance of the genetic code.

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Answer:

Homogeneous mixture is the answer for this

Answer:

A. Non-metal

B. Six

C. 2

D.NA2O

E.Oxygen

Explanation:

Oxygen is the element in the second period (second horizontal row) and Group VI A of the periodic table. These properties apply to oxygen

Answer:

20 grams.

Explanation:

5 mols of a compound has a mass of 100 grams

1 mol of the same compound has a mass of 100/5 = 20 grams

If there are three bond pairs and two lone pairs in the molecule, we are going to have a T shaped geometry. This is the expected molecular geometry of the resulting compound here.

From the valence shell electron pair repulsion theory, we know that the shape of a molecule has a lot to do with the number of electron shells that we have in the molecule. Now the electron pairs that we are concerned with here are the electron pairs that can be found on the central atom that is in the molecule.

In this case, we have been told that a central atom has five total electron group with three being bonding groups and two being lone pairs. This implies that the bond angles between the groups in the compound would be just about less than 90 degrees.

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Answer: 1.2 M

Explanation:

molarity = (moles of solute)/(liters of solution) = 2.4 / 2.0 = 1.2 M

For a solution with pOH = 4.74, the hydrogen ion concentration is approximately 1.51 × 10^(-9) M, and for a solution with pOH = 6.62, the hydrogen ion concentration is approximately 2.22 × 10^(-8) M. option A

To calculate the hydrogen ion concentration (also known as the hydronium ion concentration) from the pOH value, we can use the relationship:

pOH = -log[OH-]

where [OH-] represents the hydroxide ion concentration.

To find the hydrogen ion concentration ([H+]), we need to use the relationship:

[H+] × [OH-] = 1.0 × 10^(-14) at 25°C

Taking the negative logarithm of both sides, we get:

-log[H+] - log[OH-] = -log(1.0 × 10^(-14))

Since pOH = -log[OH-], we can rewrite the equation as:

-log[H+] - pOH = 14

Now, we can rearrange the equation to solve for [H+]:

-log[H+] = 14 + pOH

[H+] = 10^(-pH)

Using this equation, we can calculate the hydrogen ion concentration for each given pOH value:

A) pOH = 4.74

[H+] = 10^(-(14 + 4.74))

[H+] ≈ 1.51 × 10^(-9) M

B) pOH = 6.62

[H+] = 10^(-(14 + 6.62))

[H+] ≈ 2.22 × 10^(-8) M

option A

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