1) What two states of matter are pictured in the image below?

Answer:

egg

Explanation:

man

Land surfaces are much darker so they absorb much more solar radiation than water. Most of the solar radiation is reflected by water which leads in reflecting the solar radiation that reaches the surface back in to the atmosphere.

How does this occur?

Due to lower specific heat of sand it heats up faster than water. On the other hand water requires one calorie of energy to raise the temperature of one gram of water by one degree Celsius. Sand takes 19 calories per gram to raise the temperature of the sand by 1 degree Celsius.  While Sand requires fewer calories to raise its temperature one degree Celsius and that’s why it heats up faster than water.

Land absorbs more solar radiation the land surface retains more heat as do the vegetation for energy.

Therefore, during this experiment the sand heats up much faster than water. This happens because of the specific heat of the sand that initiates the heating rapidly under the lamp as the time passes.

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Answer:

2.0 x 10²³ atoms Au = 65.4g

1.5 x 10²³ atoms Pb = 51.6g

7.9 x 10²¹ atoms U = 3.1g

Explanation:

We want to convert each to grams.

We can use dimensional analysis to do so.

Kindly view the attached image for work.

1.) 2.0 x 10²³ atoms Au

Needed conversions:

Math: (2.0x10²³atoms)/(6.022x10²³atoms) x 196.966g = 65.4g

2.) 1.5 x 10²³ atoms lead

Needed conversions:

Math: (1.5x10²³atoms)/(6.022x10²³atoms) x 207.2g = 51.6g

3.) 7.9 x 10²¹ atoms U

Needed conversions:

Math: (7.9x10²¹atoms)/(6.022x10²³atoms) x 238.029g = 3.1g

At age 65, Leοn and Heidi will have apprοximately $348,762 in accumulated interest and principal.

Tο calculate the accumulated interest and principal, we need tο cοnsider the annual cοntributiοns οf $3,000 οver eight years, cοmpοunded annually at an interest rate οf 10%.

First, let's calculate the future value οf the annual cοntributiοns οver eight years. We can use the fοrmula fοr the future value οf an οrdinary annuity:

\(\rm FV = P \times [(1 + r)^{n }- 1] / r\)

Where:

FV = Future Value

P = Annual payment amοunt

r = Interest rate per periοd

n = Number οf periοds

Using P = $3,000, r = 10% (οr 0.1), and n = 8, we have:

FV = 3000 * [(1 + 0.1)⁸ - 1] / 0.1

FV = 3000 * [(1.1)⁸ - 1] / 0.1

FV ≈ 3000 * (2.1436 - 1) / 0.1

FV ≈ 3000 * 1.1436 / 0.1

FV ≈ 34,308

Sο, the future value οf the annual cοntributiοns after eight years will be apprοximately $34,308.

Next, we need tο calculate the accumulated interest and principal at age 65. Tο dο this, we'll assume the accumulated amοunt earns cοmpοund interest at the same rate οf 10% per year frοm age 33 (after the first eight years οf cοntributiοns) tο age 65. We'll use the fοrmula fοr cοmpοund interest:

A = P * (1 + r)ⁿ

Where:

A = Accumulated amοunt

P = Principal (initial investment οr future value)

r = Interest rate per periοd

n = Number οf periοds

Using P = $34,308, r = 10% (οr 0.1), and n = 65 - 33 = 32, we have:

A = 34308 * (1 + 0.1)³²

A ≈ 34308 * (1.1)³²

A ≈ 34308 * 10.1487

A ≈ 348,762

Sο, at age 65, Leοn and Heidi will have apprοximately $348,762 in accumulated interest and principal.

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Answer:

The answer is A.

Explanation:

The answer is A because it is talking about a living organism.

Hope this helps! :)

Answer:

A location that is humid, would most likely support a marsh ecosystem.

Explanation:

The Florida Everglades are an example of a marsh :)

"Marshes are a type of wetland ecosystem where water covers the ground for long periods of time. Marshes are dominated by herbaceous plants, such as grasses, reeds, and sedges."

Answer:

Proton, stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge and a rest mass of 1.67262 × 10−27 kg, which is 1,836 times the mass of an electron.

Answer:

A proton has positive charge of 1

1.6726219 × 10^-27 kilograms

Explanation:

Answer:

Environmental limitations.

Explanation:

After 62 hours, approximately 23.4375 grams of the 750 gram sample of K-42 is left.

To calculate the amount of K-42 remaining after 62 hours, we need to determine the number of half-lives that have passed and then calculate the remaining amount using the formula:

Remaining amount = Initial amount × (1/2)^(number of half-lives)

Given that the half-life of K-42 is 12.4 hours, we can divide the total time (62 hours) by the half-life to find the number of half-lives:

Number of half-lives = 62 hours / 12.4 hours = 5

Now, we can calculate the remaining amount:

Remaining amount = 750 g × (1/2)^5 = 750 g × (1/32) = 23.4375 g

Therefore, approximately 23.4375 grams of the 750 g sample of K-42 will be left after 62 hours.

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Answer:

electrolyte

Explanation:

After 72 days, a 1050 mg sample of Iodine-131 would have decayed to approximately 46.87 mg.

A half-life is the time it takes for half of a sample of a radioactive isotope to decay. It is a characteristic property of each isotope and can be used to predict how long it will take for a given sample to decay to a certain amount. The amount of an isotope remaining after a certain amount of time can be calculated using the half-life and the formula N = N0 * (1/2)^(t/T).

Iodine-131 is used in medical treatments because it emits beta particles that can destroy cancerous cells. Its short half-life is an advantage because it allows for a higher dose of radiation to be delivered to the tumor while minimizing the amount of radiation exposure to healthy tissues. After a few weeks, the Iodine-131 decays to a negligible amount and the patient is no longer radioactive.

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Answer:

The brain stem

Explanation:

Answer:

hfufhdufdhfdufhdufhdudf

Explanation:

ring a bell?

Answer:

7.17

Explanation:

convert 5.50g to moles of salicylic acid. Then use mole ratios and convert the moles of salicylic acid to moles of Asprin(mole ratio is 1:1). Then convert the moles to grams using the molar mass of asprin.

Gibbs free energy: Difference between enthalpy and entropy times temperature. Enthalpy: Internal energy plus pressure times volume for a reaction. Spontaneous: Reaction that occurs without outside help. Entropy: Measure of randomness in a system. Saturated solution: Solution with maximum solute dissolved in solvent.

Difference of the enthalpy (of a system) minus the product of the entropy and absolute temperature: Gibbs free energy.

The Gibbs free energy (G) is defined as the difference between the enthalpy (H) and the product of the entropy (S) and absolute temperature (T). Mathematically, it can be represented as G = H - T*S. The Gibbs free energy is a thermodynamic potential that indicates the maximum reversible work that can be extracted from a system at constant temperature and pressure. A negative value of Gibbs free energy indicates a spontaneous reaction or process.

Sum of the internal energy plus the product of the pressure and volume for a reaction: Enthalpy.

Enthalpy (H) is the sum of the internal energy (U) and the product of the pressure (P) and volume (V) of a system. Mathematically, it can be expressed as H = U + P*V. Enthalpy is often used to measure the heat content of a system during a chemical reaction or a physical change. It describes the overall energy change of a system, including both the internal energy and work done by or on the system.

The condition that a reaction takes place without outside help: Spontaneous.

A spontaneous reaction is a reaction that occurs without the need for any external intervention or assistance. It happens naturally and proceeds in a particular direction under given conditions. Spontaneity is determined by the change in Gibbs free energy (∆G) of the system. If the Gibbs free energy change is negative (∆G < 0), the reaction is spontaneous, indicating that it can occur without any external influence.

The extent of randomness in a system: Entropy.

Entropy (S) is a thermodynamic property that measures the extent of randomness or disorder in a system. It quantifies the distribution of energy and the number of ways in which the energy can be arranged within a system. A system with higher entropy has greater disorder, while a system with lower entropy has more order. Entropy tends to increase in spontaneous processes, reflecting the tendency of systems to move toward a more disordered state.

Solution in which no more solute can be dissolved in the solvent: Saturated solution.

A saturated solution is a solution in which the maximum amount of solute has been dissolved in a given solvent at a particular temperature and pressure. In a saturated solution, the rate of dissolution is in equilibrium with the rate of crystallization, resulting in a dynamic balance. Further addition of solute will not dissolve, as the solution is already saturated. The concentration of the solute in a saturated solution is at its maximum solubility under the given conditions.

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A chemical formula that shows the relative number of each type of atom in a molecule, using the smallest possible ratio, best describes an empirical formula. The correct option is D

The simplest whole number ratio of atoms in a chemical molecule is its empirical formula.

The empirical formula for glucose, for instance, is CH2O, which indicates that the proportion of carbon to hydrogen to oxygen atoms in glucose is 1:2:1. However, the empirical formula is a multiple of the true molecular formula for glucose, which is C6H12O6.

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Answer:

D

Explanation:

it seems the most logical

Answer:

B

Explanation:

6.00 ml

PLEASE MARK AS BRAINLIEST

Answer:

2.22×10⁻⁹ M

Explanation:

Applying,

[OH⁻][H⁺] = 1×10⁻¹⁴................... Equation 1

Where [OH⁻] = Hydroxyl ion concentration, [H⁺] = Hydrogen ion concentration.

make [OH⁻] the subject of the equation,

[OH⁻] =  1×10⁻¹⁴/[H⁺]............... Equation 2

From the question,

Given: [H⁺] = 4.51×10⁻⁶ M

Substitute into equation 2

[OH⁻] = 1×10⁻¹⁴/4.51×10⁻⁶

[OH⁻] = 2.22×10⁻⁹ M

Answer:

The chemical formula H₂O indicates that in one mole of the water there are two moles of hydrogen atoms. Calculate the moles of H₂O in 50 g. moles (n) ..

Explanation:

Answer:

it looks smaller for sure ^_^

Answer:

The answer is A and B

Explanation: I found out after a took a test. I hope this helps!

The pure substances in the list are diamond and salt.

A pure substance is a substance that contains the same atom or group of atoms throughout the substance. Hence, diamond and salt are pure substances.

Diamond is composed of carbon atoms intricately linked to each other while water is composed of only hydrogen and oxygen atoms that constitute the water molecule.

Ocean water is not a pure substance because it contains a mixture of compounds. As such, we can not regard it as a pure substance.

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Approximately 18.4832 mL of 0.250 M NaOH is required to neutralize 30.4 mL of 0.152 M HCl.

To determine the volume of 0.250 M NaOH required to neutralize 30.4 mL of 0.152 M HCl, we can use the concept of stoichiometry and the balanced chemical equation for the neutralization reaction between NaOH and HCl:

NaOH + HCl -> NaCl + H2O

From the balanced equation, we can see that the stoichiometric ratio between NaOH and HCl is 1:1. This means that for every mole of NaOH, we require an equal number of moles of HCl to neutralize.

First, let's calculate the number of moles of HCl present in the given volume:

Moles of HCl = concentration of HCl * volume of HCl

= 0.152 M * 30.4 mL

= 4.6208 mmol (millimoles)

Since the stoichiometric ratio is 1:1, the number of moles of NaOH required to neutralize the HCl is also 4.6208 mmol.

Now, let's calculate the volume of 0.250 M NaOH needed to contain 4.6208 mmol:

Volume of NaOH = (moles of NaOH) / (concentration of NaOH)

= 4.6208 mmol / 0.250 M

= 18.4832 mL

Therefore, approximately 18.4832 mL of 0.250 M NaOH is required to neutralize 30.4 mL of 0.152 M HCl.

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1.1 × 10²² atoms Au

Chemistry

Atomic Structure

Math

Pre-Algebra

Order of Operations: BPEMDAS

Step 1: Define

3.7 g Au

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of Au - 196.97 g/mol

Step 3: Convert

\(3.7 \ g \ Au(\frac{1 \ mol \ Au}{196.97 \ g \ Au} )(\frac{6.022 \cdot 10^{23} \ atoms \ Au}{1 \ mol \ Au} )\) = 1.13121 × 10²² atoms Au

Step 4: Check

We are given 2 sig figs. Follow sig fig rules and round.

1.13121 × 10²² atoms Au ≈ 1.1 × 10²² atoms Au

In a cation of Beryllium with a +1 charge, there Protons=4, Neutrons=4, Electrons=3, hence, option B is correct.

When Beryllium loses one electron to form a cation with a +1 charge, it becomes Be+1. The number of neutrons remains the same as in the neutral atom, which is 4. Option B is the right answer since protons equal 4, neutrons equal 4, and electrons equal 3.

The electron configuration of an ion, such as the +1 charge Beryllium cation, determines its characteristics, which impact its reactivity and chemical behavior.

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The three elements are Palladium (Pd), Gadolinium (Gd), and Boron (B).

Element Symbol with one unpaired 4d electron: Palladium (Pd)

The ground-state electron configuration of palladium is [Kr] 4d10 5s0, which means there is one unpaired electron in the 4d orbital.

Element Symbol with three unpaired 4f electrons: Gadolinium (Gd)

The ground-state electron configuration of gadolinium is [Xe] 4f7 5d1 6s2, indicating the presence of three unpaired electrons in the 4f orbital.

Element Symbol with the excited state electron configuration 1s22s22p'35': Boron (B)

The ground-state electron configuration of boron is 1s2 2s2 2p1. The excited state electron configuration provided indicates the removal of one electron from the 2p orbital, resulting in the configuration 1s2 2s2 2p3.

Therefore, the three identified elements are Palladium (Pd), Gadolinium (Gd), and Boron (B).

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The base used in deodorants is magnesium hydroxide. This is further explained below. Option B is correct.

Generally, A base is a chemical that reacts with hydrogen ions to neutralize an acid, a base ranges from 7-14 in the pH range

In conclusion, In deodorants, magnesium hydroxide is utilized as a base. The function of the base is to neutralize the acid released in our mouth by bacteria, which causes tooth decay and other associated problems.

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Answer:

C. magnesium hydroxide

Explanation:

Edge

Answer:

24 hours

Explanation:

There are 24 hours in a day cause that is how long for the earth to spin on its axis

Answer:

24 hours

Explanation:

The time it takes Earth to rotate so the sun appears in the same position in the sky, known as a solar day, is 24 hours. However, the time it takes Earth to complete one full rotation on its axis with respect to distant stars is actually 23 hours 56 minutes 4.091 seconds, known as a sidereal day.

to find the mass we multiply the number of moles with the molar mass

0.00808*195=1.5756g

The grams of the mercury, Hg can be produced to from 3.55 moles of  Hg is 712 g.

The reaction is given below as :

2HgO  --->   2Hg + O₂

Given that :

The moles of HgO = 3.55 moles

2 moles of the HgO produces the 2 moles of Hg, Therefore the molar ratio is same : HgO : Hg = 2 : 2.

The number of moles of Hg = 3.55 mol

The number of moles = mass / molar mass

3.55 mol = mass / 200.59 g /mol

Mass = 712 g.

Thus , the mass of the Hg produces is 712 g.

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Making both reactants in excess and the concentration of Fe(SCN)* can be determined, Making FeSt in excess and SCN as the limiting reactant and the concentration of Fe(SCN)* will be equal to the concenation of SCN.

A reagent, sometimes known as an analytical reagent, in chemistry is a substance or compound supplied to a system to either initiate a chemical reaction or test whether one happens. Although the terms "reactant" and "reagent" are not frequently used interchangeably, "reactant" refers to a material that is consumed during a chemical reaction. The anion [SCN] is thiocyanate. Thiocyanic acid's conjugate base is it. The colorless compounds potassium thiocyanate and sodium thiocyanate are examples of common derivatives. In the past, pyrotechnics employed mercury(II) thiocyanate. Thiocyanic acid is a hydracid, which is cyanic acid in which the oxygen is substituted by a sulfur atom. SCN is a tiny, very acidic [1] pseudohalide thiolate.

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