Most hot air balloons are round. Yes, you can have some other shapes like this one, but its shape is still rounded. Using the assumptions, explain why a square hot air balloon would be hard to make.

Butane < acetone < 1-propanol  is a list of the compounds in order of increasing boiling points.

The intermolecular interactions between molecules in a compound play a major role in boiling point. Higher boiling temperatures are a result of greater intermolecular interactions, bigger masses, and less branching.

The highest boiling point is for HF. As we go from HF to HI, the van der Waals forces of attraction between all hydrogen halides get stronger.

Boiling point rises as the difference in electronegativity grows. Additionally, the bp grows as the molecule's size does. So the sequence is CO2, CS2, CCl4, and then H2O.

Van der Waals attraction and dipole-dipole attraction draw acetone molecules together.

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Answer:

1) 70

2) conduction

3) The ground absorbs the solar radiation and

releases it throughout the later afternoon.

4) transpiration

5) convection

6) cumulonimbus

7) reflectivity of Earth’s surface

8) As temperature increases, air pressure

increases.

9) thermosphere

10) convection cells, pressure belts, and the

Coriolis effect

11) radiation

12) pollen

13) scattering

14) thermosphere

15) The different types of clouds are:

cumulus: Cumulus clouds are clouds which have flat bases and are often described as "puffy", "cotton-like" or "fluffy" in appearance. Their name derives from the Latin cumulo-, meaning heap or pile.

cirrus: Cirrus is a genus of atmospheric cloud generally characterized by thin, wispy strands, that typically appear white or light grey. The name is derived from the Latin word cirrus, meaning 'ringlet' or 'curling lock of hair'. Such a cloud can form at any altitude between 5,000 and 13,700 m above sea level.

stratus: Stratus clouds are low-level clouds characterized by horizontal layering with a uniform base, as opposed to convective or cumuliform clouds that are formed by rising thermals.

nimbus: Nimbostratus clouds are dark, grey, featureless layers of cloud, thick enough to block out the Sun and produce persistent rain. Height of base: 2,000 - 10,000 ft. Shape: Bands or areas of individual cells. Latin: nimbus - rainy cloud; stratus - flattened or spread out. Precipitation: Continuous rain or snow likely.

16) the tradewinds

17) the location’s latitude

18) Cirrus clouds

19) the ozone layer

20) Global winds are created by both the spin of

the Earth (Coriolis effect) and the differences

in temperature between the equator and

the polar areas. These winds are often

grouped together as trade winds, easterlies,

and westerlies.

21) nitrogen

22) the Miller-Urey hypothesis

the Oparin-Haldane hypothesis

23) ammonia gas

24) cumulus

25) It determines the mass of water in a volume of air

Explanation:

please please please mark me as brainliest

Answer:

The correct options are;

1. 1,600

2. 100 Watts

A 23-30 watt CFL provides 1,600 lumens and is equivalent to a 100 Watts incandescent bulb

Explanation:

Brightness is measured in lumens and watts measure energy usage therefore with the use of an energy saving light bulb, the same lumination can be obtained at a lower energy usage.

According to a comparison chart for LED Lights vs. Incandescent Light Bulbs vs. Compact Fluorescents (CFLs) from USAI lightening website 23-30 watts CFL has a light output of 1,600 and is therefore produces enough light as a 100 Watts Incandescent Light Bulb

Also according to energy.gov website, CFLs save up to 75% energy such that a 23-30 watt CFL can produce the same illumination as a 100 watt incandescent bulb

Therefore we have, a 23-30 watt CFL provides 1,600 lumens and is equivalent to a 100 Watts incandescent bulb.

Answer:

1600 lumens, 100 watt incandescent

Explanation:

100% on edge (:

Milk

Explanation:

because milk is very thick youknow here I go

The molecular formula of an aldehyde with the empirical formula CHO is C3H3O3.

First, we need to determine the empirical formula mass by adding the atomic masses of the atoms in the empirical formula:

C = 12.01 g/mol

H = 1.01 g/mol

O = 16.00 g/mol

Empirical formula mass = (1 x 12.01 g/mol) + (1 x 1.01 g/mol) + (1 x 16.00 g/mol) = 29.02 g/mol

Next, we can calculate the ratio of the molecular formula mass to the empirical formula mass:

ratio = molecular formula mass / empirical formula mass

We can calculate the molecular formula mass by dividing the given molar mass by the empirical formula mass:

ratio = 90.09 g/mol / 29.02 g/mol = 3.10

This means that the molecular formula has three times the number of atoms as the empirical formula. Therefore, the molecular formula of the aldehyde is C3H3O3.

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Answer:Water is entirely composed of hydrogen and oxygen Being composed of such elusive and invisible elements

Explanation:this is helped to be clear by oxygen and invisible elements like nutrients

Wave B has higher energy since it has a greater magnitude of disturbance.

The energy of a wave is directly proportional to its amplitude (height), frequency (number of cycles per second), and wavelength (distance between two successive crests or troughs of the wave). Generally, waves with higher amplitudes, frequencies, and shorter wavelengths carry more energy than those with lower values.

In summary, to determine which wave has more energy from a sketch of a wave motion, you should consider the amplitude, frequency, and wavelength of the wave, as well as the medium through which it is traveling.

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Answer:

option b is the correct answer

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There is said to be a short circuit when one part of a parallel circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part.

Short circuit means when a normal wire comes in direct contact with another wire, then the resisitance value turns zero and flow of current is ebruptly increases.

So, if in any wire very little or no resistance is present and high amount of current will flow from that wire then in this case short circuit occur. It generally occurs in the parallel circuit because in the closed circuit that much of current flow is not present that cause short circuit.

Hence option (B) is correct.

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Williamson ether synthesis would give a poor yield of product as the halide is on a 2° carbon. is true about the synthesis of 1-isopropoxy-1-methylcyclopentane.

The Williamson ether synthesis is a method for the synthesis of ethers using an alcohol and an alkyl halide. The reaction proceeds through a nucleophilic substitution mechanism and the ether product is obtained with the alcohol and halide groups in the anti-Markovnikov orientation. The reactivity of the alkyl halides used in this reaction follows the order: primary > secondary >> tertiary. Therefore, the reaction of a secondary halide such as 2° carbon halide will give a poor yield of product as the reactivity of 2° carbon halide is less compared to primary halide. As a result, the reaction is less efficient and the yield of the product is lower.

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a) Alanine is predominantly zwitterionic rather than completely uncharged at its isoelectric point (pI) due to the presence of both acidic and basic functional groups.

b) At the isoelectric point (pI), the number of molecules in the zwitterionic and uncharged forms of alanine would be equal.

Alanine contains an amino group (NH₂) and a carboxyl group (COOH), both of which can act as acids or bases. At the pI, the carboxyl group loses a proton (H⁺) and becomes negatively charged (COO⁻), while the amino group accepts a proton (H⁺) and becomes positively charged (NH₃⁺). This zwitterionic form allows alanine to have an overall neutral net charge.

b) Therefore, if there are 3 x 10⁶ molecules of alanine, half of them (1.5 x 10⁶) would be in the completely uncharged form at the pI. This is because the zwitterionic and uncharged forms exist in equal proportions when the net charge is zero, as observed at the isoelectric point.

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The mass of glucose which contains a million oxygen atoms is 0.002 g as 1 glucose molecules contains 6 oxygen atom.

Glucose is defined as a sugar having the molecular formula \(C_{6} H_{12} O_{6}\). It is the most abundant monosaccharide. It is the subcategory of carbohydrates. It is mainly made by plants and most algae during photosynthesis from water and carbon dioxide using energy from the sunlight as it is used to make cellulose in cell walls. Glucose is classified as a monosaccharide containing six carbon atoms and consist of an aldehyde group.

1 glucose molecule contains 6 oxygen atoms.

so, = 2.66 x \(10^{-17}\) g) / ( 6 x 1.66 x 10^-22 g/mole)

    = 0.002 g

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Answer:

53295J

Explanation:

The amount of heat to be added can be calculated using the formula:

Q = m × c × ∆T

Where;

Q = amount of heat (J)

m = mass (g)

c = specific heat capacity of water

∆T = change in temperature (°C)

According to the provided information, m = 150g, c = 4.18 J/gºC, final temperature= 100°C, initial temperature= 15°C

Hence, Q = m × c × ∆T

Q = 150 × 4.18 × (100°C - 15°C)

Q = 627 × 85

Q = 53295J

The amount of heat added is 53295J

The number of c70 molecules that can be made from one mole of carbon atoms would be 42.14 × 10²³ molecules.

According to standards, 1 mole of any substance contains 6.02 × 10²³ molecules of the substance.

C70 is an allotope of carbon that contains 70 atoms in a single molecule of its atom.

If 1 mole of carbon contains 6.02 × 10²³ molecules by standard, then the number of C70 molecules that can be made from 1 mole of carbon atoms would be:

6.02 × 10²³ x 7 = 42.14 × 10²³ molecules

In other words, the number of C70 molecules that can be made from one mole of carbon atom would be 42.14 × 10²³ molecules.

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The number of atoms of 3.0 moles of the particle is  1.807 x 10²⁴ atoms K.

Avogadro's number, which is approximately 6.02 x 10^23 atoms per mole, is used to convert between the number of moles of a substance and the number of atoms (or molecules) in that substance.

Given that you have 3.0 moles of K (potassium), you can use Avogadro's number to calculate the number of atoms in 3.0 moles of K:

3.0 moles K x 6.02 x 10^23 atoms K/mole = 1.807 x 10²⁴ atoms K

So, the correct answer is 1.807 x 10²⁴ atoms K

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Answer:

Explanation:

its B 1mole

Reclaimed water, also known as recycled water, is treated wastewater that has been purified to remove harmful contaminants and made safe for reuse.

It is an important resource that helps to conserve precious freshwater supplies and protect the environment.

Reclaimed water is typically used for non-potable purposes such as irrigation of landscapes, agricultural crops, and golf courses, as well as for industrial processes, dust control, and fire protection.

It can also be used for groundwater recharge and in certain cases, even for toilet flushing. Although reclaimed water may not be suitable for drinking, it is treated to meet strict standards and is subject to rigorous monitoring to ensure that it is safe for its intended use.

The use of reclaimed water can help to reduce the demand for freshwater, lower the cost of water treatment and distribution, and provide a sustainable and reliable source of water for various applications.

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Answer:

the second one

Explanation:

THE answers is b

Answer:

Electromagnetic induction

Explanation:

i think

In quantum chemistry, Linear Combination of Atomic Orbitals or LCAO is a superposition or mixing of atomic orbitals and a technique used for calculating molecular orbitals.

By  Linear Combination of Atomic Orbitals , we can predict which atomic orbitals can mix to form a molecular orbital on the basis of orbital symmetry. We can also predict the number of molecular orbitals that can be produced from the interaction between two atomic orbitals.

By LCAO, the position of electrons can be determined. If can electron is found in an atomic orbital say "A" and also in atomic orbital say B". Then the superposition of the two atomic orbitals A and B will give the overall wave function. It is represented by ψ.

ψ± = N(A ±  B)

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Answer:

Loss of energy to a colder material. Ice forms at 32°F /0° C.

Explanation:

As water cools, the natural movement between the molecules slows until it changes to a solid state (just as it boils to gas if they become too active). This movement doesn't completely stop until the material hits "absolute zero" at -460°F /-273° C. (0° Kelvin).

That's about the temperature "in the shade" in outer space.

A more interesting question would be, "why does water expand when it freezes?" The H - two - O molecule forms a triangle (with the O in the middle).

As it cools, the angle formed by the two H's gets larger. At around 36°F /2° C , the shrinking space between molecules gets overwhelmed by the expanding size of each molecule.

So, for those last few degrees before freezing, the overall volume gets bigger instead of continuing to decrease.

That's what causes potholes in roads (water settles into cracks, then makes the crack larger as it freezes). It's what damages the eaves trough around your roof, breaks leaves down into topsoil and splits boulders in half.

The hybridization change that occurs for phosphorus in the reaction PCl3 + Cl2 → PCl5 is sp3 → sp3d.The hybridization change that occurs for phosphorus in the reaction PCl3 + Cl2 → PCl5 is sp3 → sp3d.PCl3 + Cl2 → PCl5The above reaction is a balanced chemical equation.

The phosphorus (P) atom in PCl3 has a hybridization of sp3, whereas the Cl2 molecule has a hybridization of sp2. During the formation of PCl5, there is a hybridization change in the phosphorus atom from sp3 to sp3d.A change in the hybridization of an atom occurs when it is involved in a chemical reaction. The changes in hybridization occur due to the difference in electronegativity of the atoms in the reactants or due to the bond formation.

For instance, in the reaction PCl3 + Cl2 → PCl5, the reaction occurs due to the formation of a covalent bond between the P atom in PCl3 and Cl atom in Cl2. This causes the electrons in the 3p subshell of the P atom to undergo excitation, resulting in the hybridization change from sp3 to sp3d.Hence, the correct answer is sp3 → sp3d.

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Answer:

B. electric energy then chemical energy

Explanation:

The pH of the solution is used to estimate the acidic and the alkaline condition. The pH paper can be used to determine the conditions. The compound with pH 13.3 is basic.

The concentration of the hydrogen or the hydroxide ion in the water gives the estimate of the pH. The potential and the amount of hydrogen decide the acidic and the basic compound.

The pH scale ranges from 0-14 where the scale of 0-6 is acidic, 7 is neutral and 8-14 is basic. If the substance shows a pH of 13.3 then it will lie in the basic range.

Therefore, the compound with a pH of 13.3 is basic.

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The molar mass of aspartame is approximately 294.30 g/mol with 5 oxygen atoms and 1.51 × 10^23 molecules of aspartame. There are approximately 0.068 moles of aspartame in 20.0 g.

i) To calculate the molar mass of aspartame, we need to sum up the atomic masses of all the atoms in its chemical formula, C14H18N2O5:

Molar mass of carbon (C) = 12.01 g/mol

Molar mass of hydrogen (H) = 1.01 g/mol

Molar mass of nitrogen (N) = 14.01 g/mol

Molar mass of oxygen (O) = 16.00 g/mol

Molar mass of aspartame = (14 × molar mass of C) + (18 × molar mass of H) + (2 × molar mass of N) + (5 × molar mass of O)

Calculating the molar mass of aspartame:

Molar mass of aspartame = (14 × 12.01) + (18 × 1.01) + (2 × 14.01) + (5 × 16.00)

Molar mass of aspartame ≈ 294.30 g/mol

Therefore, the molar mass of aspartame is approximately 294.30 g/mol.

ii) To determine the number of moles of aspartame in 20.0 g, we can use the molar mass of aspartame:

moles = mass / molar mass

moles = 20.0 g / 294.30 g/mol

moles ≈ 0.068 moles

Therefore, there are approximately 0.068 moles of aspartame in 20.0 g.

iii) To calculate the number of molecules of aspartame in 0.250 moles, we can use Avogadro's number:

number of molecules = moles × Avogadro's number

number of molecules = 0.250 moles × 6.022 × 10^23 molecules/mol

number of molecules ≈ 1.51 × 10^23 molecules

Therefore, there are approximately 1.51 × 10^23 molecules of aspartame in 0.250 moles.

iv) To calculate the number of oxygen atoms in one molecule of aspartame, we can look at the chemical formula:

C14H18N2O5

There are 5 oxygen atoms in one molecule of aspartame.

Therefore, there are 5 oxygen atoms in aspartame.

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Answer:

Explanation:

\(\frac{7.8}{7.8+134} \times 100 \approx \boxed{5.5\% \text{ (to 2 sf)}}\)

Explanation:

this is a very easy question, you just need to know the formula of density, the mass and volume.

you're given the mass of the iron which is 28.5g and when it is submerged into a cylinder containing 45.50 ml, it rises to 49.10 ml. the volume of water displaced gives you the volume of the iron. thus,

V² - V¹ = 49.10 ml - 45.50 ml

V of iron = 3.6 ml

now that you know both the mass and volume, you can work out the question.

density (ρ) = mass / volume

ρ = m/v

ρ = 28.5 g / 3.6 ml

ρ = 7.916666...

ρ = 7.92 g/ml (3 sf)

hope this helps you!

- s.

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Answer

The variation in the rate k (k1/k2) is 0.5707 s^-1

Step-by-step explanation:

Given the following parameters

Activation energy = 43.5Kj.mol

T1 = 300K

T2 = 310K

R = 8.314 J.Kmol

Answer:

it would be number 4

Explanation:

Answer:

1255200J

Explanation:

1 cal = 4.184 J

1kcal = 4184 J

thus, 300 kcal= 4184 × 300

= 1255200J

= 1255.2 kJ

= 1.2552 MJ