Please help ASAP. Thanks so much!!!

Answer:

Earlier today, my friend got a call from the company where she had recently applied for a job. They informed her that she had been selected for an interview, which was scheduled for later this week. She was overjoyed and relieved to hear the news, as she had been searching for a job for several months and this was one of the positions she was most excited about. The call was definitely the highlight of her day, and it put her in a great mood for the rest of the afternoon! :) She immediately called her parents and friends to share the good news and celebrate!!

Answer:

The waters' temp increased

Explanation:

The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.

The correct statement is Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons.

In a simple way to explain, Isotopes are species that have the same atomic number and mass number.

In this case, we can say that the correct statement is proton number of isotopes of an element is same.

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A methane molecule (CH4) is considered symmetrical because it possesses a symmetric structure and exhibits symmetry operations.

Symmetry refers to a balanced arrangement of elements that can be divided into equal parts by a plane, axis, or center. In the case of methane, it exhibits several symmetrical characteristics.

Firstly, methane has a tetrahedral molecular geometry, with the carbon atom at the center and four hydrogen atoms positioned around it. This geometry ensures that the molecule is symmetrical in terms of its spatial arrangement.

Each hydrogen atom is located at one of the vertices of the tetrahedron, forming equal angles and distances with respect to the central carbon atom. This symmetry is maintained regardless of the orientation of the molecule.

Additionally, methane possesses rotational symmetry. It can be rotated around any of the carbon-hydrogen bonds, and the molecule will retain its overall appearance.

The symmetry of methane arises from its molecular structure and the equal distribution of electron density around the central carbon atom. The four hydrogen atoms are bonded to the carbon through sigma bonds, which have a cylindrical symmetry. This balanced arrangement of the atoms contributes to the overall symmetry of the molecule.

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Answer:

The wax vapor starts to burn and creates the stable candle flame that you see. When you blew out the candle you should have seen white smoke rising up into the air from the wick. This is the wax vapor, which becomes visible as it condenses into small liquid droplets in the cooler air.

Explanation:

hope it helps

Answer:

This would be my answer and I hope this helps you.

observe that the flame is not touching the solid candle or the melted wax. It appears to be only touching the wick. I ask them if they think that the candle would burn as long if it were only the wick that was burning. What is the purpose of the wax? When the students place the first flame into the smoke of the second candle, they should see the second candle relight. It is not necessary to touch the wick in order for it to relight. This should lead them to conclude that it is the wax vapor that is burning.

When the students place the beaker containing the ice water above the candle, they should see condensation on the bottom of the beaker. If they hold it too close, they will not see the condensation and will see soot form. Students will usually recognize that the condensation is made of water, but they have difficulty recognizing that it comes from the combustion of the candle.

When the Erlenmeyer flask is placed over the top of the candle in the water, student should observe that the water candle goes out and the water rises. The students test the gas that was collected with phenol red solution (an acid-base indicator). They should observe that the solution changes from red to yellow. I demonstrate that this might indicate the formation of carbon dioxide by blowing through a straw into a solution of phenol red.

Explanation:

Hope this helped you!And thanks for inviting me to be your friend!(:

Answer:

Explanation:

PLATO ANSWER

Answer:

A or B, but I think B would be the safer option.

Explanation:

In an ecosystem, the following chart of cows depicts cause or effect of the text structure.

An 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 by means of nutrient cycles and flow of energy.

Energy enters the ecosystem 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 ecosystem .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.There are different types of ecosystems present.

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The property of water is that It exists in all three states on Earth.

The major residences to be able to be mentioned in this text are its appeal to polar molecules, its high specific warmth, the excessive warmness of vaporization, the decrease density of ice, and its high polarity.

The primary homes of water are its polarity, concord, adhesion, floor anxiety, excessive unique warmth, and evaporative cooling. A water molecule is barely charged on each ends. this is because oxygen is more electronegative than hydrogen.

Water is good sized functionality to dissolve a ramification of molecules has earned it the designation of “standard solvent,” and it's far this capacity that makes water such an invaluable life-sustaining pressure. On a biological level, water's role as a solvent facilitates cells transport and use substances like oxygen or vitamins.

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The heat required is to convert 75.0 g of C₂Cl₃F₃ from a liquid at 13.60 ∘C to a gas at 76.00 ∘C is 17.55 kJ.

To solve this problem, we need to consider the different steps involved in the process of converting 75.0 g of C₂Cl₃F₃ from a liquid at 13.60 ∘C to a gas at 76.00 ∘C;

Heating the liquid C₂Cl₃F₃ from 13.60 ∘C to its boiling point at 47.6 ∘C, Vaporizing the liquid C₂Cl₃F₃ at its boiling point, and heating the resulting gas from 47.6 ∘C to 76.00 ∘C

Now, we can use the equations to calculate the heat required for each step;

q₁ = m × C₁ × ΔT₁

where q₁ is the heat required, m is the mass of C₂Cl₃F₃, C₁ is the specific heat of C₂Cl₃F₃(l), and ΔT₁ is the temperature change from 13.60 ∘C to 47.6 ∘C.

q₁ = 75.0 g × 0.91 J/g⋅K × (47.6 ∘C - 13.60 ∘C)

= 2466 J

q₂ = n × ΔHvap

where q₂ is the heat required, n is the number of moles of C₂Cl₃F₃, and ΔHvap is the heat of vaporization of C₂Cl₃F₃.

n = m/M

= 75.0 g / 137.37 g/mol

= 0.5464 mol

q₂ = 0.5464 mol × 27.49 kJ/mol

= 15.038 kJ

q₃ = m × C₂ × ΔT₂

where q₃ is the heat required, m is the mass of C₂Cl₃F₃(g), C₂ is the specific heat of C₂Cl₃F₃(g), and ΔT₂ is the temperature change from 47.6 ∘C to 76.00 ∘C.

m = n × M

= 0.5464 mol × 137.37 g/mol

= 75.0 g

q₃ = 75.0 g × 0.67 J/g⋅K × (76.00 ∘C - 47.6 ∘C)

= 1446 J

The total heat required is the sum of the heats required for each step;

\(q_{total}\)= q₁ + q₂ + q₃

= 2466 J + 15.038 kJ + 1446 J

= 17.55 kJ

Therefore, the total heat required is 17.55 kJ.

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Answer:

See explanation.

Explanation:

Hello,

In this case, we can realize that water has a very simple atomic structure which consists of two hydrogen atoms bonded to one oxygen atom. The nature of the atomic structure of water causes its molecules to have unique electrochemical properties. The hydrogen side of the water molecule has a slight positive charge whereas at the other side of the molecule a negative charge exists. This molecular polarity causes water to be a powerful solvent and is responsible for its strong surface tension.

Moreover, water is involved in several both inorganic and organic chemical reactions leading to hydration, for example, the conversion of alkenes to alcohols, the hydrolysis of acyl halides, anhydrides, esters and amides to carboxylic acids and the hydration of a raft of inorganic salts that exist as hydrates only, such as copper (II) sulfate pentahydrate and so.

Best regards.

Color is a physical property of matter related to a material’s ability to reflect light.

Color is a physical property of chemicals that in most cases comes from the excitation of electrons due to an absorption of energy performed by the chemical.

Color is that portion of the visible spectrum of light that is reflected back from a surface. A color can only be observed in the presence of light.

When light hits a surface, the particles of the object absorbs the colors in the light. However, not all colours are absorbed by the surface as some are reflected. The reflected color is seen as the color of that object.

The color of light coming from an object is what gives it color. Light travels into the eye to the retina located on the back of the eye. The human eye and brain work together to translate light into color.

Therefore, it can be said that a substance's ability to reflect light is color.

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Answer:

CH2O

Explanation:

                       Carbon                      Hydrogen                   Oxygen

mass(g)            10.0                            1.68                            13.4

no. of                10/12 = 0.83333      1.68/1 = 1.68            13.4/16=0.8375

moles  

ratio          0.83333/0.83333=1   1.68/0.8333≈2        0.8375/0.83333≈1

_________________________________________

to find number of moles, divide mass by element's mass number

to find ratio, divide number of moles of each element by the element with the smallest number of moles (in this case, carbon)

ratio will give you empirical/molecular formula, CH2O

For cigarette lighters containing liquid butane, C4H10, the quantity of heat produced  is mathematically given as

q= -49.2 KJ

Generally, the equation for the Chemical reaction   is mathematically given as

C₄H₁₀(l) + 6.5 O₂(g)---->4 CO₂(g) + 5 H₂O(l)

Therefore

dH°r = .(-393.5 ) + 5.(-285.5] - [1.(-147.6 )+6.5.

dH°r = -2853.9 kJ/mol

In conclusion, No.of mole

Nm = 1g/58g/mol

Nm= 0.01724mol

Hence, Heat of combustion

q = dH°r x moles

q = -2853.9 ×0.01724

q= -49.2 KJ

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Answer:

26

Explanation:

The atomic number of an atom describes the number of protons within its nucleus. Since the ion has 26 protons, the atomic number must be 26.

Answer:

The pressure increases by a factor of four.

Explanation:

Let's consider a gas at a given temperature and pressure (T₁, P₁). The absolute temperature of a gas is increased four times (T₂ = 4 T₁) while maintaining a constant volume. We can assess the effect on the pressure (P₂) by using Gay Lussac's law.

P₁/T₁ = P₂/T₂

P₂ = P₁ × T₂/T₁

P₂ = P₁ × 4 T₁/T₁

P₂ = 4 P₁

The pressure increases by a factor of four.

Answer:

option b

Explanation:

The names of the positions are called:

(1) (10) Atomic number

(2) (11) Chemical symbols

(3) (12) Elements

(4) (13) Atomic mass

Atomic structure refers to the composition and arrangement of subatomic particles within an atom. An atom consists of a central nucleus, which contains positively charged protons and uncharged neutrons, surrounded by negatively charged electrons that move around the nucleus in shells or energy levels.

The number of protons in the nucleus determines the atomic number and thus the identity of the element. The arrangement of electrons around the nucleus determines the chemical and physical properties of the element.

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The questions are:

10 What is the name for the number in this position called? (the answer is not "6") →6

11 What is the name for the letter in this position called? (the answer is not "C"!) →C

12 What is the name in this position called? (the answer is not "Carbon"!) →Carbon

13

What is the name for the number in this position? (the answer is not "12.0") →12.0

Use the spaces below to type your answers to the questions above.

Answer:

2.15

Explanation:

For this question, we have to remember the pH formula:

\(pH~=~-Log[H_3O^+]\)

By definition, the pH value is calculated when we do the -Log of the concentration of the hydronium ions (\(H_3O^+\)). So, the next step is the calculation of the concentration of the hydronium ions. For this, we have to use the molarity formula:

\(M=\frac{mol}{L}\)

We already know the number of moles (0.0231 moles) and the volume (3.33 L). So, we can plug the values into the molarity formula:

\(M=\frac{0.0231~moles}{3.33~L}=0.00693~M\)

With this value, now we can calculate the pH value:

\(pH~=~-Log[0.00693~M]~=~2.15\)

The pH would be 2.15

I hope it helps!

Answer:

B. Divergent boundary

Hope this helps :)

Answer:

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Answer:

Explanation:

From the given information:

The percentage wieght of mixture \(x_w\) = 0.4

The distillate = 70

From equilibrium data in Exercise 7.33

The Feed W = 100

The Liquid residue F = Feed(W) - Distillate (D)

= 100 - 70 = 30

By applying rayleigh equation;

\(In \bigg (\dfrac{F}{W}\bigg)= \int^{xF}_{x_w}\dfrac{1}{y-x} \ dx\)

From the plot of the graph of \(\dfrac{1}{y-x} \ vs \ x\); the area under the curve is being calculated between the point {\(x_1 = 0.4 \ and \ x_2\) }.

Such that; the area \(= In \bigg( \dfrac{100}{30}\bigg)\) = 1.209

Similarly, the value of xF = 0.067

∴

\(y_D = \dfrac{F_{xF} - W_{xW}}{D}\)

\(y_D = \dfrac{30(0.067)-100(0.4)}{70}\)

\(y_D = 0.543\)

Answer: We must first compute the quantity of H2O that can result from the reaction of AL(CH)3 and H2SO4 in order to determine the mass of H2O produced.

Explanation:

Let's begin by formulating the reaction's balanced chemical equation:

Al2(SO4)3 + 6 H2O + 2 CH4 = 2 AL(CH)3 + 3 H2SO4

According to the equation, 2 moles of AL(CH)3 and 3 moles of H2SO4 combine to form 6 moles of H2O.

1.75 g of AL(CH)3 is equal to: 1.75 g / 78.0 g/mol = 0.0224 mol of AL(CH)3 as 1 mole of AL(CH)3 has a molar mass of roughly 78.0 g/mol.

2.00 g of H2SO4 is equal to: 2.00 g / 98.1 g/mol = 0.0204 mol of H2SO4 as 1 mole of H2SO4 has a molar mass of roughly 98.1 g/mol.

In order to calculate the amount of H2O produced, we must now identify the limiting reagent.

We contrast the moles of AL(CH)3 and H2SO4 in use. AL(CH)3 and H2SO4 have a stoichiometric ratio of 2 to 3. As a result, 3 moles of H2SO4 are required for every 2 moles of AL(CH).

The equation states that 2 moles of AL(CH)3 will yield 6 moles of water. Therefore, we can calculate the moles of H2O created for 0.0224 mol of AL(CH)3 as follows: 0.0224 mol AL(CH)3 (6 mol H2O / 2 mol AL(CH)3) = 0.0672 mol H2O

Finally, we may use the molar mass of H2O to convert its moles to grams. H2O has a molar mass of about 18.0 g/mol:

18.0 g/mol x 0.0672 mol H2O = 1.21 g H2O

As a result, the mass of H2O generated is roughly 1.21 grams if H2SO4 is the limiting reagent.

Answer:

Exothermic Reaction/ Combination Reaction

Explanation:

It is a combination reaction and the nature of the reaction is exothermic.  

Answer:

below•

Explanation:

6.1 g total?

I don't really know alot about Chemistry

Humans primarily form communities because social interaction is essential for our survival and well-being.

Living in communities provides us with numerous benefits that we cannot obtain on our own, including protection, food and resource sharing, cooperation, and support. Communities allow us to pool resources and skills, to share knowledge and experiences, and to work together to achieve common goals.

In addition, humans are social creatures by nature, and we have a natural inclination to form social connections and relationships with others. Being part of a community satisfies this need for social interaction and can lead to increased feelings of belonging, purpose, and happiness. Community also provides opportunities for personal growth, learning, and development, as we are exposed to different perspectives, ideas, and experiences through interactions with others.

Overall, forming communities allows humans to better navigate the challenges and opportunities of the world, and to achieve a higher quality of life through cooperation and collaboration.

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The xylem carries water from the roots to the leaves.

option D.

The xylem is a specialized tissue in plants that functions primarily to transport water and dissolved minerals from the roots to the leaves and other parts of the plant. It is a long, continuous tube-like structure that is made up of dead cells arranged end-to-end, forming a continuous pathway for water movement.

The water is pulled upwards through the xylem by the transpiration process, which is driven by the evaporation of water from the leaves. The xylem also provides structural support to the plant.

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The mass of Na22 in the sample is 0.053746 g.

We have a sample with 2 isotopes of sodium. Na22 with a relative atomic mass of 21.9944 u  and Na23 with a relative atomic mass of 22.9898 u. Let "x" be the fractional abundance of Na22 and "1-x" the fractional abundance of Na23. If the apparent atomic mass is 22.9501 u, we can state the following expression.

\(mNa22 \times x + mNa23 \times (1-x) = 22.9501u\\21.9944u \times x + 22.9898u \times (1-x) = 22.9501u\\x=0.039883\)

The mass of the sample is 1.3476 g. We can find the mass of Na22 in the sample by multiplying it by its fractional abundance.

\(1.3476g \times 0.039883 = 0.053746 g\)

The mass of Na22 in the sample is 0.053746 g.

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