g which solutes would you expect to be able to cross a phospholipid membrane bilayer without the aid of a transporter protein? [select all that apply.] group of answer choices alanine glucose o2 h2o ca2 nacl pentane (c5h12) nh3

Answer:

Explanation:

A compound that can act both as an acid and a base is called an amphoteric substance. A good example (based on the question) of an amphoteric substance is the Aluminium hydroxide [Al(OH)₃] where Aluminium is the "M" in M-O-H. Aluminium is in the third period of the periodic table. The reaction below shows aluminium can act both as an acid and as a base in different neutralization reactions.

As an acid

Al(OH)₃ + 3NaOH ⇒ Na₃AlO₃ + 3H₂O

As a base

3HCl + Al(OH)₃ ⇒ AlCl₃ + 3H₂O

NOTE: A neutralization reaction is a reaction between an acid and a base to give you salt and water

The balanced equation for the combustion of ethane, C2H6, is: C2H6 + 3O2 → 2CO2 + 3H2OTo determine how much heat is produced if 7.0 moles of ethane undergo complete combustion, we need to use the balanced equation and the standard enthalpies of formation of the reactants and products.

The standard enthalpy of formation of a compound is the enthalpy change when one mole of the compound is formed from its constituent elements, with all reactants and products in their standard states (usually at 1 atm and 25°C).The standard enthalpies of formation of the reactants and products in the combustion of ethane are:

ΔHf°(C2H6) = -84.68 kJ/mol

ΔHf°(O2) = 0 kJ/mol

ΔHf°(CO2) = -393.51 kJ/mol

ΔHf°(H2O) = -285.83 kJ/mol

Now we can calculate the heat produced by using the difference between the enthalpies of the products and reactants:

2CO2 + 3H2O - (C2H6 + 3O2)

ΔH = 2(-393.51 kJ/mol) + 3(-285.83 kJ/mol) - (-84.68 kJ/mol + 3(0 kJ/mol))

ΔH = -1560.78 kJ/mol

Therefore, if 7.0 moles of ethane undergo complete combustion, the amount of heat produced will be:

-1560.78 kJ/mol x 7.0 mol

= -10,925.46 kJ or -10,925,460 J.

Note that the negative sign indicates that heat is released by the reaction, which is exothermic.

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Answer:

The particle theory of matter is a model that describes the arrangement and movement of particles in a substance. The model is used to explain the physical properties of solids, liquids and gases.

Explanation:

Answer:

Grey school buses would likely get in more accidents because other drivers are expecting a yellow bus to make frequent stops and the lights and stop sign are noticeable on a brighter color.

Explanation:

yellow buses are easier to see in fog than a grey bus

The ionic compounds can be ranked in order of increasing attraction between their ions as follows: BaO < CaO < BaCl2.

Ionic compounds contain ions that are attracted to one another due to a variety of characteristics, such as the ions' charge, size, and distance from one another. The melting and boiling points of the compound are typically greater the stronger the attraction between the ions.

These criteria allow us to rank the ionic compounds BaO, BaCl2, and CaO in the following order of increasing ion attraction:

BaO: Ba²⁺ cations and O²⁻ anions make up bao. Although both ions are 2-charged, the Ba²⁺ ion is bigger than the  O²⁻ ion. As the ions are relatively far apart, there is less attraction between them than in other compounds. As a result, BaO's ions have the weakest attraction to one another.

CaO: Ca2+ cations and O2 anions make up CaO. The Ca2+ ion is smaller than the Ba2+ ion despite the fact that both ions have a 2-charge. The ions are thus closer to one another and more attracted to one another than in BaO. As a result, CaO has a stronger ion attraction than BaO.

BaCl2: Ba2+ cations and Cl anions make up baCl2. The Cl anion is bigger than the O2 anion, while the Ba2+ ion is bigger than the Ca2+ ion. Because of this, the ion distance is greater than in CaO but less than in BaO. Due to the opposite charges and closer proximity, the attraction between the ions is stronger than in CaO and BaO.

Hence, of the listed compounds, BaCl2 has the highest attraction between its ions.

As a result, the ionic compounds can be classified as follows in terms of the strength of the attraction between their ions: BaO, CaO, and BaCl2.

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Answer:

wow ok have fun

Explanation:

Answer:

hiiiiiiiii

Explanation:

thank you

Answer:

n = 6.06 x \(10^{-4}\) mol

Explanation:

n =?

m = 3.06 x 10-³ g

M (H5) = 5 x 1.01 (Since we only want hydrogen)

Atomic mass of C = 12.01

Atomic mass of H is 1,01, etc.

Having this data, we can use the Molar mass formula and change it so we can know the quantity of matter (n) in moles, and we just replace it.

M = \(\frac{m}{n}\) ⇔ n = \(\frac{m}{M}\) ⇔ n = \(\frac{3.06 x 10^{-3} }{5,05}\) ⇔ n = 6.06 x \(10^{-4}\) mol

Note: The numbers I've used may be different from yours, by a small difference. I don't know if it's the case, but hope it helped.

The bicameral systems can be traced back to different representation for the States and the people. In a bicameral legislature, the legislative branch is divided into two houses or chambers, each with its unique functions, powers, and structure.

In a bicameral system, the states have representation in one chamber of the legislature, while the people are represented in the other chamber. A bicameral legislature is found in various countries, including Australia, India, Canada, and the United States. This type of legislature was initially used in ancient Greece and Rome. The goal of a bicameral system is to ensure that all voices are heard in the legislative process and that the process is balanced and impartial.

In a bicameral legislature, the lower chamber or house, which is often referred to as the "people's house," is typically elected by the citizens of the country. The upper chamber or house, on the other hand, is usually made up of members who represent each state or region in the country. The purpose of this is to ensure that each state or region has an equal say in the legislative process.

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The mass of aluminum that would absorb 250kJ when melted at its melting point is 630.3g

It is given that the molar enthalpy of fusion is 396.6J and the amount of heat that would be absorbed is 250kJ. Let the mass of Aluminum should be absorbed be x. Then, it should be noted that,

1g of Aluminum can absorb 396.6 J. Then x grams of Aluminum could absorb 250kJ. Hence x could be found as,

1g of Aluminum can absorb 396.6 J

x g of Aluminum can absorb 250kJ. Therefore,

x. = 250000/396.6

x = 630.3 g

Therefore the mass of aluminum that would absorb 250000J of heat would be equal to 630.3 g

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Answer:

is it 500 g

Explanation:

cause m stands for mass

To find the amount of heat produced, the value of m which we plug is 500 grams.

Amount of heat absorbed or released during any chemical change will be calculated as:

Q = mc∆T, where

Q = absorbed or released heat

m = mass of substance

c = specific heat of substance

∆T = change in temperature

So, according to question to calculate energy in place of m we will put the given mass of aluminum which is equal to 500g.

Hence required value of m is 500g.

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Answer:

Answer:

ggggygyggyygygygygyggy

Explanation:

What's this for?

Answer:

B) Methanoic Acid

Explanation:

Answer:

it’s higher

Explanation:

i had already had mine up but someone erased it somehow

Answer: Pulley or a crane.

Explanation:

Answer:

An inclined plane would have to be too long, and a lever would be impractical. Pulleys are best used to raise objects.

Explanation:

The true statement about writing chemical formulas of covalent compounds is that the chemical formulas of covalent compounds show the number and type of atoms in a molecule.

A covalent compound is a chemical compound that is formed by the bonding of two or more nonmetal atoms through the sharing of electrons. Because there is no transfer of electrons as there is in ionic compounds, covalent compounds have low melting and boiling points.

Covalent compounds are formed by combining two or more nonmetals, and their formula units use the prefixes mono-, di-, tri-, tetra-, penta-, hexa-, and so on to indicate the number of atoms in a molecule.

Here are some steps to write the chemical formula of a covalent compound:First, identify the elements that make up the covalent compound by reviewing the name of the compound and determining which elements are present.Next, look up the electronegativity values of each element in the compound in a table of electronegativities.

The electronegativity difference between the two elements will be less than 1.7 because the compound is covalent.Now, write the chemical symbol of the first element in the compound, followed by the chemical symbol of the second element.

For example, CO is carbon monoxide, and CO2 is carbon dioxide.

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Answer:

summer solstice

Explanation:

on june solstice the northen hemisphere leans more toward the sun giving us longer days and more strong sunlight and It's the opposite in the Southern Hemisphere where june marks the start of winter thus its the shortest day of the year

The first level of DNA organization in a eukaryotic cell is maintained by histone molecule. A histone is a protein that gives chromosomes structural support.

A kind of protein that is present in chromosomes. Histones bind to DNA, assist shape chromosomes, and regulate the expression of genes. The lengthy DNA molecules that make up each chromosome must fit inside the cell nucleus. The chromosome takes on a more compact shape as a result of the DNA wrapping around complexes of histone proteins.

Eukaryotic creatures are big and complicated because eukaryotic cells include nuclei that are encased in nuclear membranes. Eukaryotic cells are found in protozoa, fungi, plants, and mammals. A membrane-bound nucleus is a feature of eukaryotic cells. Chloroplasts can be found in plants and algae, while other membrane-bound organelles like the mitochondria and golgi apparatus are frequently seen in eukaryotic cells.

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Answer:

The molar mass of O is 16 g/mol and since we have 2 oxygen molecules we multiply 16 g/mol to get 32 g/mol.  Therefore our best option would be option C, 32 g/mol.

Answer:

Without the respiratory system your blood would be useless. The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body

Explanation:

During chemical weathering, sodium is released as dissolved ions and transported to the ocean, where

(C)  Most of it is used in shells of such creatures as clams, corals, and coccoliths.

Chemical weathering is a natural process that involves the breakdown and alteration of rocks and minerals through chemical reactions. One of the outcomes of this process is the release of various elements and compounds into the environment. When it comes to sodium, during chemical weathering, it is released as dissolved ions and transported to the ocean.

In the ocean, sodium plays a vital role in the formation of shells for certain marine organisms. Many marine creatures, including clams, corals, and coccoliths, utilize the dissolved sodium ions to build their protective outer coverings. These shells are primarily composed of calcium carbonate, and the presence of sodium ions helps in the construction and maintenance of these structures.

Clams, for example, use the available sodium ions to assist in the formation of their shells, providing strength and durability. Corals, which are made up of tiny individual polyps, extract sodium ions from the water to form their intricate calcium carbonate skeletons. Coccoliths, microscopic single-celled algae, incorporate sodium ions along with calcium carbonate to create their distinctive calcite plates.

By using sodium ions in the shells of these marine organisms, the dissolved sodium is effectively sequestered and removed from the water, leading to a decrease in its concentration. However, it is important to note that not all of the sodium released during chemical weathering ends up in shells. Some sodium may still remain in the water, contributing to its salinity.

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Answer:

siks creo que creo que siks

Answer:

Below

Explanation:

2 H2  + O2  ====>      H20      you have 4 H's on L...need 4 on right so:

2H2  + O2 =====>  2 H2 O      Now H's are 'balanced' and a check of the O's  shows they are balanced too (two O's on each side)

Answer: it’s b)

Explanation: that’s the only difference that is listed

Answer:

I think it is B

Explanation:

Answer:

b atoms

Explanation:

everything is made up of atoms

Answer:

The balanced equation would be:

3AgNO3+Al→3Ag+Al(NO3)3

Explanation:

Answer:

When hydrochloric acid comes into contact with calcium carbonate, the following chemical reaction ensues: CaCO3 + 2HCl → CaCl + CO2 + H2O, which provides acid neutralization alongside the formation of byproducts

Answer:

C) liquid

Explanation:

edge 2023

The initial temperature in degrees Celsius, of the gas, given that the gas has volume of 0.219 L when the temperature is 30 °C is 182.19 °C

From the question given above, the following data were obtained:

Now, we can obtain the initial temperature of the gas by using the Charles' law equation as shown below:

V₁ /  = V₂ / T₂

0.329 / T₁ = 0.219 / 303

Cross multiply

T₁ × 0.219 = 0.329 × 303

Divide both side by 130

T₁ = (0.329 × 303) / 0.219

= 455.19 K

Subtract 273 to obtain answer in °C

= 455.19 - 273 K

= 182.19 °C

Thus, from the above calculation, we can conclude that the initial temperature is 182.19 °C  

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The chemist has 642.4 millimoles of barium acetate in the solution.

To calculate the millimoles of barium acetate (Ba(C₂H₃O₂)₂) in the solution, we can use the formula:

moles = molarity × volume (in liters)

First, let's convert the volume from milliliters (mL) to liters (L):

440.0 mL ÷ 1000 = 0.440 L

Now we can substitute the given values into the formula:

moles = 1.46 M × 0.440 L

moles = 0.6424 mol (rounded to 4 decimal places)

To convert the moles to millimoles, we multiply by 1000:

millimoles = 0.6424 mol × 1000

millimoles = 642.4 mmol (rounded to 3 significant digits)

Therefore, the chemist has 642.4 millimoles of barium acetate in the solution.

It's important to note that the molarity (M) represents the number of moles of solute per liter of solution. By multiplying the molarity by the volume in liters, we can find the number of moles of solute. To convert moles to millimoles, we multiply by 1000. The result represents the millimoles of barium acetate present in the given volume of solution.

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Answer:

B

Explanation:

Its nucleus is identical to an alpha particle, and consists of two protons and two neutrons. Alpha decay of heavy elements in the Earth's crust is the source of most naturally occurring helium-4 on Earth, produced after the planet cooled and solidified.

Answer: B. An Alpha particles

As helium is consist of 2 protons and 2 neutrons

Alpha particles, also consist of 2 protons and 2 neutrons bound together into a particle that's why identical to a helium-4 nucleus.