What is the ph of a 0. 056 m hno3 solution?.

Answer:

\(\boxed {\tt 48 \ grams}\)

Explanation:

Mass can be found by multiplying the density by the volume.

\(m=d*v\)

The density is 2 grams per cubic centimeter.

The volume is 24 cubic centimeter.

\(d= 2 \ g/cm^3 \\v=24 \ cm^3\)

Substitute the values into the formula.

\(m= 2 \ g/cm^3 *24 \ cm^3\)

Multiply. Note that the cubic centimeters, or cm³ will cancel each other out.

\(m= 2 \ g * 24\)

\(m= 48 \ g\)

The mass of the material is 48 grams.

The molecular formula of most monosaccharides represents a multiple of B. CH₂O.

The most fundamental type of carbohydrates are monosaccharides. The majority of organisms convert monosaccharides like glucose into energy, which they then store or use as needed. The number of carbon atoms in this form of glucose and the functional group that is connected to it are used to classify it.

Monosaccharides are simple sugars, and their general molecular formula is (CH₂O)n, where "n" represents the number of carbon atoms in the molecule. This formula indicates that monosaccharides consist of carbon, hydrogen, and oxygen atoms, with the ratio of hydrogen to oxygen being the same as in water (H₂O). Each carbon atom is typically connected to a hydroxyl group (-OH) except for one carbon, which is double-bonded to an oxygen atom, forming the carbonyl group (C=O).

So, the correct choice is B. CH₂O.

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The molecular formula of most monosaccharides represents a multiple of CH2O.

The correct answer is B. CH2O.

The molecular formula of most monosaccharides represents a multiple of CH2O, which means that they have the same ratio of carbon, hydrogen, and oxygen atoms. This formula reflects the basic structure of monosaccharides, which consist of carbon (C), hydrogen (H), and oxygen (O) atoms in a 1:2:1 ratio, respectively.

For example, glucose, which is a monosaccharide, has a molecular formula of C6H12O6. If we divide each subscript by the greatest common divisor (in this case, 6), we get the simplest ratio of C1H2O1, which is equivalent to CH2O.

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Answer:

natural selection

A

Explanation:

I looked it up

if you want the answer urself look up "How has Charles Darwin contributed to the study of evolution?"

The value of the H-C-H bond angle in ethylene is 117°.

The bond angle is a geometric angle that is formed due to the repulsion between atoms or electrons in a bond. The binding angle for a linear molecule is 180°, for a triangular planar molecule it is 120°, and so on.

The size of the bond angle is affected by the magnitude of the repulsive force of electron pairs in the molecule. The lone pair has a slightly stronger repulsive force than the bonding pair. This happens because the lone pair of electrons is only bound to one atom, so the movement is more flexible.

Determine the bond angles using VESPR theory, such as if the shape of the molecule AX means that it is linear with a bond angle of 180 degrees.

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The statement that describes how a rabbit responds to the spring season is as follows: It rests in it's den (option B).

Hibernation is a state of minimum power consumption, inactivity and metabolic depression in some animals during winter.

Rabbits unlike other animals do not hibernate in the winter or cold weather. They are active year-round. During winter, the colder temperatures and lack of vegetation force rabbits to spend more time searching and hunting for food.

However, as a change, rabbits stay in their den more often to reduce their level of activity.

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In an ecosystem, strike-slip type of basin  are formed at transform boundaries.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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The number of protons and the number of neutrons is 14.

The most common isotope of silicon is silicon 28 with the mass number=28 and atomic number=14.

An atomic number is defined as the number of protons or the number of electrons present in the given element. The atomic number is used to define the chemical properties of the elements. The atomic number of silicon is 14. Hence the number of protons is 14.

The mass number is defined as the combined total of the number of protons and the number of neutrons present in the given element. The mass number of silicon is 28. Hence the number of neutrons=28-14=14.

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Answer:

C7H6O2

Explanation:

Let;

68.8% of Carbon represents 68.8g

4.95% of Hydrogen represents 4.95g

26.25% of Oxygen represent 26.25g

Next, we convert each gram value to mole value by dividing by their respective molar mass {C = 12, H = 1, O = 16}

C = 68.8/12 = 5.73 mol

H = 4.95/1 = 4.95 mol

O = 26.25/16 = 1.64 mol

Next, we divide each mole value by the smallest (1.64mol)

C = 5.73 ÷ 1.64 = 3.49

H = 4.95 ÷ 1.64 = 3.02

O = 1.64 ÷ 1.64 = 1

Next, we multiply each ratio by 2 to obtain our simplest whole number ratio (empirical formula)

C = 3.5 × 2 = 7

H = 3.02 × 2 = 6

O = 1 × 2 = 2

Hence, the ratio of C, H and O is 7:6:2 and the empirical formula of benzoic acid is C7H6O2

Answer:

O

Explanation:

O is in the red which says nonmetal

Ethane is the limiting reactant, so no mass of ethane will be left over by the chemical reaction. All the mass will react, the 8.1 grams of ethane.

How much grams of ethane will react, explain.

First of all, we need to determine the reaction and the limiting reactant to work with the stoichiometry.

The equation is: 2C₂H₆ + 7O₂ →  4CO₂ + 6H₂O

We define the moles of the reactants:

8.12 g / 30 g/mol = 0.270 moles of ethane

13g / 32 g/mol = 0.406 moles of oxygen

To determine the limiting reactant, we start with oxygen:

7 moles of O₂ can react with 2 moles of ethane

Then, 0.406 moles of O₂ will react with (0.406 . 2) / 7= 0.116 moles of ethane.

We do not have enough ethane, just only 0.07 moles to react.

Ethane is the limiting reactant, so no mass of ethane will be left over by the chemical reaction. All the mass will react, the 8.12grams of ethane.

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Answer:

Explanation:

Cu(s) + 2Ag+  ======> Cu^(2+) + Ag(s)

Notice what happened. Silver started out as an ion. It took on 2 electrons that were donated by the copper.

The silver then became a solid ppte. This equation wil take on much more meaning when you take up oxidation and reduction. Until then, you need only know who gave up elections and who took them up.

The advantage of Bronsted-Lowry base theory over the Arrhenius base theory is that the Bronsted-Lowry bases can act as proton acceptors.

According to the definition of Bronsted-Lowry, a base is a proton acceptor. In that case, the concept of bases is not limited to only the hydroxide ions.

Thus the advantage of Bronsted-Lowry base theory over the Arrhenius base theory is that the Bronsted-Lowry bases can act as proton acceptors.

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Answer:

A

Explanation:

The subatomic particle that plays the greatest part in determining the properties of an element is the electron (B).

The properties of an element are primarily determined by its atomic structure. Elements are characterized by the number of protons, neutrons, and electrons they possess.

Protons and neutrons are located in the nucleus of an atom, while electrons orbit around the nucleus in energy levels or shells.

The electron configuration of an atom, specifically the arrangement and distribution of electrons in the outermost shell, is what primarily influences the chemical and physical properties of an element. The behavior of atoms in chemical reactions, bonding patterns, and electrical conductivity are all related to the movement and interactions of electrons.

Although protons and neutrons contribute to factors such as atomic mass and stability, the electron's involvement in chemical reactions and interactions is most significant in determining an element's properties.

Therefore, the subatomic particle that plays the greatest part in determining the properties of an element is the electron (B).

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To calculate the mass of sulfur required to produce 112 dm^3 of sulfur dioxide (SO2) at standard temperature and pressure (STP), Approximately 20.044 grams of sulfur are required to produce 112 dm^3 of sulfur dioxide at STP.

we need to use the balanced chemical equation for the combustion of sulfur.
The balanced equation for the combustion of sulfur is:
S8 (s) + 8O2 (g) -> 8SO2 (g)

From the equation, we can see that 1 mole of sulfur (S8) reacts to produce 8 moles of sulfur dioxide (SO2).

First, we need to calculate the number of moles of SO2. At STP, 1 mole of any gas occupies 22.4 dm^3. Therefore, 112 dm^3 of SO2 corresponds to 112/22.4 = 5 moles of SO2.

Since the molar ratio between S8 and SO2 is 1:8, we can conclude that the number of moles of sulfur required is 5/8 = 0.625 moles.

To calculate the mass of sulfur, we need to use the molar mass of sulfur (32.07 g/mol). Multiply the number of moles (0.625 moles) by the molar mass of sulfur to get the mass of sulfur required.

Mass of sulfur = 0.625 moles x 32.07 g/mol = 20.044 g

Therefore, approximately 20.044 grams of sulfur is required to produce 112 dm^3 of sulfur dioxide at STP.

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Radiant energy is the energy of electromagnetic waves. Light energy is a form of radiant energy that is visible to the human eye.

Radiant energy is the energy of electromagnetic waves. These waves can travel through space. Electromagnetic radiation is made up of tiny particles called photons – think of them as little packets of energy. Light energy is a form of radiant energy that is visible to the human eye.

Answer: Gamma radiation

Explanation:

Gamma rays have high penetrating power, similar to high-energy X-rays.

To calculate the minimum concentration of \(Mg_{2}\) + that must be added to 0.10 M NaF in order to initiate a precipitate of magnesium fluoride (\(MgF_{2}\)), we can use the concept of the solubility product constant (Ksp).

The balanced equation for the precipitation reaction is:

\(Mg_{2}\) + + 2F- → \(MgF_{2}\) (s)

The Ksp expression for \(MgF_{2}\) is:

Ksp = [\(Mg_{2}\) +] \([F-]^{2}\)

Since the stoichiometry of the reaction is 1:2 between \(Mg_{2}\) + and F-, we need to consider that we need twice the concentration of F- ions compared to\(Mg_{2}\) + ions in order to satisfy the stoichiometry. Therefore, we will set up the following equation:

Ksp = [\(Mg_{2}\) +]\([F-]^{2}\)

Ksp = (x) \((2x)^{2}\) (since [F-] = 2x)

Ksp = 4\(x^_{3}\)

where x is the concentration of \(Mg_{2}\) + ions in mol/L.

Given that Ksp for \(MgF_{2}\) is 6.9 x \(10^-^{9}\), we can set up the equation:

6.9 x\(10^-^{9}\) = 4\(x^{3}\)

Solving for x:

\(x^{3}\) = (6.9 x \(10^-^{9}\) ) /4

x = [ (6.9 x \(10^-^{9}\) ) / \(4] ^{^{1/3}\)  

x ≈ 7.2 x \(10^-^{3}\)

So, the minimum concentration of \(Mg_{2}\) + ions that must be added to 0.10 M NaF in order to initiate a precipitate of \(MgF_{2}\) is approximately 7.2 x \(10^-^{3}\) M.

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Answer: the amount of time over which the number of parent isotopes decreases by half

Explanation: yes

Answer:

Explanation:simple 1s22s22p63s23p1

short form [Ne] 3s23p1

orbital energy diagram

The ground state electronic configuration, 1s22s22p63s23p645' is of potassium in the periodic table. Option C is correct.

A periodic table is an arrangement done by Mosley for better learning and understanding of the physical and chemical properties of an element and to know about the electronic configurations of the elements.

In potassium the arrangement of electrons in the shells of s, p, d, and f are 1s22s22p63s23p645' and these shells contain different energies and this is the stable electronic configuration that means at the ground state for the element.

Therefore, Option C is correct. The  ground state electronic configuration, 1s22s22p63s23p645' is of potassium in the periodic table.

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In a weak acid and strong base titration, the pH at the equivalence point is affected by: the basicity of the salt anion. Hence, the final pH of the equivalence factor will be higher than 7.

At the equivalence point, the mixture of a weak acid and a strong base produces basic salt. This happens because the acid is too weak to donate the hydrogen ions to the solution, so it has an anion of a strong base. Meanwhile, the base is strong enough to accept hydrogen ions from water, so it has a cation of a weak acid. It affects the salt pH to be greater than 7 (basic salt).

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Answer: a

Explanation:

The highest entropy will be 0 mL of water at 100°C.

Entropy is just a measured physical quality that will be most usually linked with disorder, unpredictability, or uncertainty.

The quantity of random movement in a system increases as more energy is put into it. Entropy rises like a volume increases in a system.

Therefore, the correct answer will be option 1.

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From the given information using the colligative property, the vapor pressure of seawater at 20°C is approximately 17.07 Torr.

To calculate the vapor pressure of seawater at 20°C, we can use the following equation:

ΔP = P°(solvent) - P(solvent)

where ΔP is the change in vapor pressure, P°(solvent) is the vapor pressure of the pure solvent (water), and P(solvent) is the vapor pressure of the solvent in the solution (seawater). We can solve for P(solvent) to get the vapor pressure of seawater.

The vapor pressure of pure water at 20°C is given as 17.54 Torr. We can assume that the seawater solution is dilute and therefore can use the following approximation:

ΔP ≈ -Km

where K is the cryoscopic constant (for water, K = 1.86 °C/m) and m is the molality of the solution.

Substituting the given values, we get:

ΔP = -Km = -1.86 °C/m × 1.10 m = -2.046 °C

To convert this temperature change to a vapor pressure change, we can use the Clausius-Clapeyron equation:

ln(P°(solvent)/P(solvent)) = ΔHvap/R × (1/T(solvent) - 1/T°)

where ΔHvap is the enthalpy of vaporization of the solvent, R is the gas constant, T(solvent) is the temperature of the solvent in kelvin (20 + 273 = 293 K), and T° is the normal boiling point of the solvent (100°C or 373 K for water).

We can solve for P(solvent) to get:

P(solvent) = P°(solvent) × exp(-ΔHvap/R × (1/T(solvent) - 1/T°))

The enthalpy of vaporization of water is approximately 40.7 kJ/mol, and R is 0.08206 L·atm/mol·K.

Substituting the values, we get:

P(solvent) = 17.54 Torr × exp(-40700 J/mol / (0.08206 L·atm/mol·K × 293 K) × (1/293 K - 1/373 K)) = 17.07 Torr

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7.273 - 12.37 = -5.097

Answer:

-5.10

Explanation:

7.273 - 12.37 = -5.097

round up!

:)

If the daily value for Ca is 1500 mg, the number of Tums tablets needed by older women each day would be  7.5 tablets.

Calcium carbonate consists of calcium and carbonate ions as follows:

\(CaCO_3 -- > Ca^{2+} + CO_3^{2-}\)

Thus, for every 1 mole of calcium carbonate, 1 mole of calcium is involved.

Recall that: mole = mass/molar mass

500 mg of calcium carbonate would be equivalent to:

0.5/100 = 0.005 mol

The equivalent mole of calcium would also be 0.005 mol.

5 mol of calcium would be equivalent to:

0.005 x 40 = 0.2 grams or 200 mg of calcium.

This means that 1 Tums tablet, contains 200 mg of calcium. But 1500 mg is needed daily.

1500/200 = 7.5

This means that older women will need to take 7.5 tablets of Tums per day in order to meet up with the daily calcium requirement of 1500 mg.

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Answer:

Synthesis of Potassium Nitrate (KNO3)

When potassium hydroxide neutralizes nitric acid potassium nitrate is formed.

Answer:

Below.

Explanation:

Nitric acid and potassium hydroxide:

HNO3 + KOH  ---> KNO3 + H2O.

Rehardens the newly arranged disulfide bonds as well as neutralizes any remaining waving lotion in the hair through oxidation is called a neutralizer.

Waving Lotion / Solution is the one that softens and swells the cuticle layer then it breaks the disulfide bonds through the process of reduction.

Neutralizer is the substance that  rehardens the newly arranged disulfide bonds as well as neutralizes any remaining waving lotion in the hair through oxidation.

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