This table shows sizes of Earth's oceans. Based on this table and the makeup of Earth's total water, which reasonable conclusion can be made? A) Earth's seas contain more salt water than the oceans. Earth's land has more surface area than Earth's oceans. Earth's largest source of salt water is the Pacific Ocean. D) The Pacific Ocean is larger than all other oceans combined. USATestprep, LLC... Settings Po X​

The 14C will be found in both carbon dioxide and water when measured later.

In the given reaction, CO(g) H₂O(g) <--> CO₂(g) H₂(g), when you replace every 12C atom in CO₂ with a 14C atom, you are introducing a radioactive isotope of carbon, 14C. Since CO₂ is formed in the forward reaction and H₂ is formed in the reverse reaction, both CO₂ and H₂ will contain the 14C isotope. Therefore, when you measure it later, you can expect to find 14C in both CO₂ and H₂.

The equilibrium of the reaction will still be maintained, and the 14C will be distributed between the two products. It is important to note that the concentration of 14C in each product will depend on the initial concentrations of CO and H₂O and the position of the equilibrium.

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the lattice energy of MgH2() is 2791 kJ/mol with a series of step when the Enthalpies of formation for calcium hydrided is given.

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Solution:

the lattice energy of MgH2() is :

ΔHf(−75. 3 kJ/mol )  =S+0.5D+IE+EA+U

ΔHf(−75. 3 kJ/mol )= 2791 kJ/mol

The papers published in MDPI Special Issues are of extremely high quality! When I published my research with MDPI (Energies Journal), it was a wonderful experience. Both the submission of the manuscript and the timing of publishing were excellent.

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Answer:

5.0000 I think this answer so mark be brainlist

The incorrect statement regarding the reaction between aqueous solutions of aluminum nitrate, Al(NO3)3, and ammonium carbonate, (NH4)2CO3, which form a precipitate of aluminum carbonate, Al2(CO3)3 is If 0.5 mole of (NH4)2CO3 react with sufficient Al(NO3)3, 3 moles of Al2(CO3)3 will be formed. Option C.

A chemical equation is a description of the chemical reaction that takes place. It contains the formulae of the reactants and products separated by an arrow. The arrow indicates the direction of the reaction. The stoichiometric coefficients in the equation represent the number of moles of each substance involved in the reaction.

Stoichiometry is a branch of chemistry that deals with the quantitative relationships between reactants and products in a chemical reaction. It's important to keep in mind that the law of conservation of mass applies to chemical reactions. This means that the number of atoms of each element present in the reactants must equal the number of atoms of that element present in the products. Thus, stoichiometry plays a significant role in determining how much product is formed from a given amount of reactant and vice versa. Option C.

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Answer:

140 g (to 2 sf)

Explanation:

The atomic mass of magnesium is 24.305 u.

The atomic mass of oxygen is 15.9994 u.

So, the gram-formula mass of magnesium dioxide, in g/mol, is

\(2(15.9994) + 24.305 = 56.3038\)

So, the mass of 2.5 moles is (56.3038)(2.5), which is equal to 140 g (to 2 sf)

Molecules have sufficient kinetic energy to overcome the intermolecular forces in the liquid. So option B is correct.

Molecules of a liquid can pass into the vapor phase provided that the molecules have adequate kinetic energy to beat the intermolecular powers in the fluid.

This happens when the temperature of the fluid is close to its edge of boiling point, and the vapor tension of the fluid is high. The surface pressure of the fluid affects the vaporization cycle.

So, the correct option is b) "molecules have sufficient kinetic energy to overcome the intermolecular forces in the liquid."

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We find that the concentration hydronium ion is approximately 3.5488 x 10⁻⁶ M.

pH is a measure of the acidity or alkalinity of a solution. It quantifies the concentration of hydrogen ions ([H⁺]) in a solution. The pH scale ranges from 0 to 14, with values below 7 indicating acidity, values of 7 indicating neutrality, and values above 7 indicating alkalinity. The pH of a solution is determined by calculating the negative logarithm (base 10) of the hydrogen ion concentration. A lower pH value corresponds to a higher concentration of hydrogen ions, indicating greater acidity, while a higher pH value indicates lower hydrogen ion concentration and greater alkalinity.

To determine the [H⁺] concentration using the pH value, we can use the relationship:

pH = -log[H⁺]

Rearranging the equation, we get:

[H⁺] = 10^(-pH)

Substituting the given pH value of 5.45 into the equation:

[H+] = 10^(-5.45)

Calculating this value, we find that [H⁺] is approximately 3.5488 x 10⁻⁶ M.

Therefore, the correct answer is (e) 3.5488 x 10⁻⁶ M.

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The number of moles of a substance is calculated from the given weight of the substance and its molecular mass by using the formula:

No. of moles = \(\frac{Mass of substance in grams}{Molecular mass of substance}\)

Molecular mass of Na₂SO₄.10H₂O is calculated to be

(23×2)+32+(16×4)+(10×18) = 46+32+64+180 = 322 g/mol

Thus, for 483g of Na₂SO₄.10H₂O, the number of moles would be

= \(\frac{322}{483}\) = 0.67 mol

For every 1 mole of Na₂SO₄.10H₂O, there are 2 moles of Na⁺ and 1 mole of SO₄²⁻.

Thus, 0.67 moles of Na₂SO₄.10H₂O will have 0.67×2= 1.34 moles of Na⁺ and 0.67 moles of SO₄²⁻.

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Answer:

D

Explanation:

Only some types of waves can move through a vacuum and soundwaves ar not one of them.

Sound waves do not carry matter.

But soundwaves do transfer energy through particles and as I just said, they do not carry matter.

Sound waves convey energy from one particle to the next in matter, but they do not carry the matter with them.

Option D. is correct.

Longitudinal waves are created in which the individual fluid is flowing move in a direction that's also parallel to the energy transfer direction.

The vibrations of such particles in a sound wave flowing through air are better expressed as longitudinal vibrations.

Sound waves convey energy from one particle to the next in matter, but they do not carry the matter with them.

Option D. is correct.

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Answer: D) Sodium Chloride is dense, soluble in water, brittle, ionic lattice, high melting point.

Apply Charles law

\(\\ \bf\bull\rightarrowtail V1T2=V_2T1\)

\(\\ \bf\bull\rightarrowtail 10(20)=25V_2\)

\(\\ \bf\bull\rightarrowtail 200=25V_2\)

\(\\ \bf\bull\rightarrowtail V_2=8L\)

Answer:

hope it's helpful to you

Answer:

10.80

Explanation:

As per the equation, let us calculate the mole ratio. N2+3H2→2NH3. As per the equation one mole of nitrogen  reacts with 1 mol of hydrogen.

In terms of mass. 28.01 g of nitrogen needs 3 mol of hydrogen or 6.048 g of hydrogen.

We can set up the ratio;

28.01 g of

l

N

2

needs  

6.048 g of

l

H

2

1 g of

l

N

2

needs  

6.048

28.01

g  of

l

H

2

50.0 g of

l

N

2

needs  

6.048

×

50.0

28.01

l

g of

l

H

2

=

10.80 g of

l

H

2

Each C-H bond is formed by the overlap of an sp³ hybrid orbital from C and a 1s orbital from H.

Thus, the correct answers are sp³ hybrid; 1s.

Eаch C-H bond in methаne, then, cаn be described аs аn overlаp between а hаlf-filled 1s orbitаl in four hydrogen аtoms аnd the lаrger lobe of one of the four hаlf-filled sp³ hybrid orbitаls form а four equivаlent sigmа (σ) bond. This orbitаl overlаp is often described using the notаtion: sp³(C)-1s(H). The formаtion of sp³ hybrid orbitаls successfully explаins the tetrаhedrаl structure of methаne аnd the equivаlency of the four C-H bonds.

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Answer:

sea water

Explanation:

For an FCC crystal: calculate the density of atoms (atoms/a² where a is the lattice constant) for the (100), (110) and (111) planesThe unit cell of a FCC crystal is shown below:Here, each corner atom contributes 1 atom, and each face atom contributes 1/2 atoms.

For (100) plane:Length of unit cell along (100) plane direction = a Density of atoms = No. of atoms / Area of the plane Area of the plane = a²Density of atoms for (100) plane = 4 / a²For (110) plane:Length of unit cell along (110) plane direction = a√2Density of atoms = No. of atoms / Area of the plane Area of the plane = a x a√2Density of atoms for (110) plane = 2 x 2 / (a x a√2) = 4√2 / a²

For (111) plane:Length of unit cell along (111) plane direction = a√3Density of atoms = No. of atoms / Area of the plane Area of the plane = a²√3/2 Density of atoms for (111) plane = 3 x 4 / (a²√3) = 4√3 / a²Hence, the density of atoms for the (100), (110) and (111) planes in an FCC crystal are as follows:For (100) plane: 4 / a²For (110) plane: 4√2 / a²For (111) plane: 4√3 / a².

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Answer:

They have different DNA and different physical appearance

Explanation:

Because if the sperms fertilize two different eggs the DNA will be different too and if the sperms are different the physical appearance will be different also

Answer:

The radiation of the Sun's electromagnetic waves

Explanation:

Earth's atmosphere keeps much of the Sun's energy from escaping into space. This process, called the greenhouse effect, keeps the planet warm enough for life to exist.

Random errors will shift each measurement from its true value by a random amount and in a random direction. These will affect reliability (since they're random) but may not affect the overall accuracy of a result.

Kb1 = 1.61 × 10^-10 and Kb2 = 4.35 × 10^-9. The basicity constant, or Kb, is a measure of the strength of a base in a particular chemical reaction. The products of a reaction of a weak base and water with the corresponding acid determine the base constant.

For example, for a given acid and base, Kb1 and Kb2 are the basicity constants for the first and second base dissociations, respectively, of the base. The formulas and charges of the conjugate acid and base, as well as the acid dissociation constants, Ka1 and Ka2, are needed to calculate Kb1 and Kb2.

The following reactions are balanced chemical reactions that represent the dissociation of succinic acid:

Reaction 1: H2C4H4O4(aq) + H2O(l) ⇌ HC4H4O4(aq) + H3O+(aq) Ka1 = 6.2 × 10−5
Reaction 2: HC4H4O4(aq) + H2O(l) ⇌ C4H4O42-(aq) + H3O+(aq) Ka2 = 2.3 × 10−6

The values of Ka1 and Ka2 can be used to calculate Kb1 and Kb2, respectively, using the following equation:

Ka1 × Kb1 = Kw

where Kw is the ion-product constant for water, which is 1.0 × 10−14 at 25°C.

Kb1 can be calculated as follows:

Kw = Ka1 × Kb1

Kb1 = Kw / Ka1

Kw = 1.0 × 10^-14

Ka1 = 6.2 × 10^-5

Kb1 = Kw / Ka1

Kb1 = 1.0 × 10^-14 / 6.2 × 10^-5

Kb1 = 1.61 × 10^-10

Kb2 can be calculated using the same method:

Kw = Ka2 × Kb2

Kb2 = Kw / Ka2

Kw = 1.0 × 10^-14

Ka2 = 2.3 × 10^-6

Kb2 = Kw / Ka2

Kb2 = 1.0 × 10^-14 / 2.3 × 10^-6

Kb2 = 4.35 × 10^-9

Therefore, Kb1 = 1.61 × 10^-10 and Kb2 = 4.35 × 10^-9.

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The number of atoms in 16.25 g of Al is calculated here. One mole or 26.98 g of Al contains 6.022 × 10²³ atoms. Thus, the atoms in 16.25 g or 0.60 mol of Al contains 3.62 × 10²³ atoms.

Any substance containing 6.022 × 10²³ atoms is called one mole of that substance. This number is called Avogadro number. Therefore, one mole of every substances contains Avogadro number of atoms. The mass of one mole of an atom is called its atomic mass.

Al is 13th element in periodic table. Its atomic mass is 26.98 g/mol. Thus, the  number of moles of 16.25 g of Al is calculated as follows:

no.of moles = given mass/atomic mass

                    = 16.25/26.98 =0.60 moles.

1 mole of Al contains 6.022 × 10²³ atoms. Thus, 0.60 moles contains 6.022 × 10²³ × 0.60 =  3.62 × 10²³ atoms.

Therefore, to calculate the number of atoms in a given number of moles of an element multiply the number of moles with Avogadro's number.

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The medication can treat people who have the disease described. According to the commercial, the drug has FDA approval to treat a condition whose symptoms are listed.

Additionally, the narrator notes that the medication only comes with a prescription and has 1% of the active substance. We can deduce from this information that the drug can effectively treat persons who have the condition generating these symptoms, but obtaining it requires a prescription. The commercial provides no support for the other possibilities.

Therefore, the correct option is D.

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Answer:

The liquid will freeze

Explanation:

well see... all the other answers require INCREASING the temp, so yeah.

please brainliest me. i just gave away 1300 points in the last 24 hours for questions like "what is 1+1"

Answer:

NaCl

Explanation:

Na is the symbol of sodium. Cl is the symbol of chlorine

Answer:

35/44* 6.022*10^24

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Explanation:

Answer:

The answer will be listed below.

Explanation:

Speed and velocity both represent a way to measure the change in position of an object relative to time. If the motion is in a straight lne, then the speed and velocity would be the same. When measuring speed and velocity, they are used in m/s.

Answer:

To produce a solution that frees at -50°C we need 1668.5 g of ethylene glycol

Explanation:

Formula for freezing point depression is:

Freezing T° of pure solvent - Freezing T° of solution = Kf . m . i

Our solute is the ethylene glycol, then water is our solvent.

As ethylene glycol is a non ionic compound, i = 1 (Van't Hoff factor, numbers of ions dissolved)

Kf = Cryoscopic constant. For water is 1.86 °C/m

We replace data:

0°C - (-50°C) = 1.86 °C/m . m . 1

To determine grams of ethylene glycol needed, we need to find m (molality)

50°C / 1.86 m/°C = m → 26.8 mol/kg

As this moles of solute are contained in 1kg, definetely we need 26.8 moles of ethylene glycol.

To find the answer, we convert moles to mass:

26.8 mol . 62.07g / mol = 1668.5 g

Answer:

Hello there! :) All of these are molecular formulas but F2.

Explanation:

F2 goes by the name flourine and is not F2 in it's chemical makeup. Na2SO4 is also called Sodium Sulfate and is a molecular formula. Everyone knows what H2O is, the molecular formula for water and lastly CO2 is carbon dioxide. Hope this helps!

Total displacement  is √(x² + y²)

The magnitude of total displacement can be calculated using the Pythagorean theorem.

Simply add the squares of the x-component and y-component of the velocity, then take the square root of the result to get the total displacement.

The magnitude of total displacement is calculated using the Pythagorean theorem, which states that the sum of the squares of the lengths of the two legs of a right triangle is equal to the square of the length of the hypotenuse.

To find the total displacement, you must first square the x-component and y-component of the velocity. Then, add these two numbers together to get the sum of the squares of the two legs.

Finally, take the square root of this result to get the magnitude of total displacement. This calculation can be represented using the following equation:

Total displacement = sqrt(x² + y²)

So, the magnitude of total displacement given the x-component(x) of a velocity and the y-component(y) of a velocity is √(x² + y²).

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