Giving away 20 points and brainlest, please help

What type of transport does not require energy to move molecules across the plasma membrane?

A. bilayer

B. active

C. passive

D. concentration gradient

The number of carbon atoms present in 1.25 mol of silver acetate is 1.875 × 10²³.

Avogadro's number is define as the number of atoms of any substance present in one mole of that substance, and it is equal to 6.022 × 10²³, i.e.
1 mole = 6.022 × 10²³ atoms/mol

Given moles of silver acetate = 1.25 moles

Number of atoms of silver acetate in 1.25 moles = 1.25 × 6.022 × 10²³ = 7.5×10²³

Molecular formula of silver acetate is CH₃CO₂Ag, means in this molecule total 8 atoms are present so number of carbon atom will be calculated as:

Carbon atoms = (2× 7.5 × 10²³) / 8 = 1.875 × 10²³ atoms [here we multiply by 2 because 2 atoms of carbon is present in olecule]

Hence required atoms of carbon is 1.875 × 10²³.

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Answer:

Tides are the rise and fall of sea levels caused by the combined effects of gravitational forces exerted by the Moon and the Sun, plus the rotation of the Earth. Tides are caused by the gravitational pull of the moon and sun. High and Low tides are caused by the moon. Spring tides occur twice each lunar month all year long without regard to the season. Neap tides, which also occur twice a month, happen when the sun and moon are at right angles to each other.

Explanation:

Hope this helped! :D

Understanding physical properties of matter is essential in everyday life for a variety of purposes, from cooking to choosing materials.

Knowledge of physical properties of matter is extremely important in everyday life as it helps us understand the nature of substances we come into contact with. One example is the use of boiling points in cooking. Different substances have different boiling points which determine the temperature at which they boil. This information is crucial in determining cooking times and ensuring that food is cooked properly.

For instance, water boils at 100 degrees Celsius, while sugar syrup boils at a much higher temperature. If the wrong temperature is used, food may be undercooked or overcooked, leading to undesired outcomes. Knowledge of physical properties also helps in choosing the right materials for different purposes, such as choosing heat-resistant materials for cooking.

In conclusion, understanding physical properties of matter is essential in everyday life for a variety of purposes, from cooking to choosing materials.

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Explanation

NH4Cl(s) = NH4+(aq) + Cl-(aq) AH = +3.5 kcal/mole

We have some changes that shift the equilibrium to the right, according to Le Châtelier's principle.

I will write some of them:

By Adding amount of NH4Cl or by increasing the temperature because according to the heat of the reaction this is an endothermic reaction.

Answer: Increasing the temperature of the system.

The waves in order from lowest  to highest pitch ​: picture 1,2,3,4

Wavelength : from the crest to the crest of the next wave or the trough to the trough

Frequency (f): number of waves in one second

Can be formulated :

\(\tt v=\lambda\times f\\\\f=\dfrac{v}{\lambda}\)

So the frequency is inversely proportional to the wavelength

The smaller the wavelength the greater the frequency and the greater the pitch

From the picture above (transverse wave), we determine the wavelength that is formed:  ⇒1 wavelength =one crest (peak) + trough (base)

wavelength = distance : wave(distance = 4)

\(\tt 1\rightarrow 1\dfrac{1}{2}~wave\rightarrow \lambda=\dfrac{4}{1\frac{1}{2} }=2.67 \\\\2\rightarrow 2~wave\rightarrow \lambda=\dfrac{4}{2}=2 \\\\3\rightarrow 2\dfrac{1}{2}~wave\rightarrow \lambda=\dfrac{4}{2\frac{1}{2} }=1.6\\\\4\rightarrow 3~wave\rightarrow \lambda=\dfrac{4}{3}=1.33\)

So picture 1 has the largest wavelength, so it has the smallest frequency and the smallest pitch

Answer:

The pitch of a sound is how high or low it is. The higher the frequency of a sound wave is, the higher its pitch.

Each of the waves below represents a sound wave. Put the waves in order from lowest to highest pitch.

Explanation:

Answer:

soysauce bro

Explanation:

Answer:

trail mix

Explanation:

a heterogeneous mixture is a mixture with non-uniform composition. two or more of the mixture's components must be separate for the mixture to be heterogeneous.

A solution at pH 1 has more hydrogen ions than a solution at pH 4. The pH of a solution refers to the hydrogen ion concentration.

The concentration of hydrogen ions and the pH of a solution are inversely proportional. This means that the higher the hydrogen ion concentration, the lower the pH, and vice versa.

A solution at pH 1 will have more hydrogen ions than a solution at pH 4.The pH of a solution is defined as the negative logarithm of the hydrogen ion concentration. The equation for calculating the pH of a solution is given as follows:

\($$pH = -\log_{10}[H^+]$$\)

In this equation, [H⁺] is the hydrogen ion concentration in moles per liter (mol/L) of solution. A change of 1 pH unit corresponds to a 10-fold change in the hydrogen ion concentration.

Therefore, if a solution has a pH of 1, it has a hydrogen ion concentration of 0.1 mol/L.

If a solution has a pH of 4, it has a hydrogen ion concentration of 0.0001 mol/L. Thus, a solution at pH 1 has more hydrogen ions than a solution at pH 4.

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When designing a cup of a fixed volume, the designer must be guided by the intended use of the cup.

A cup is a hollow object that is primarily used to drink water. Cups are used in every home. Being a solid shape, the volume of the cup is fixed.

However, the shape and structure of the cup depends on its intended use. Hence, when designing a cup of a fixed volume, the designer must be guided by the intended use of the cup.

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Answer:

Sodium reacts more quickly, generating enough heat to melt itself and to occasionally ignite the hydrogen gas, producing a yellow-orange flame characteristic of sodium. The potassium reacts violently, immediately bursting into a flame which has the characteristic violet color of potassium.

Explanation:

The volume of the irregular solid from the image that have been shown is  12 mL

To obtain the volume of the irregular solid;

a. Measure the initial volume of water in the cylinder.

b. Carefully lower the irregular solid into the water, ensuring it is fully submerged without trapping any air bubbles.

c. Record the new volume of water in the cylinder.

d. The volume of the irregular solid is equal to the difference between the final and initial water volumes.

The volume is;

32 mL - 20 mL = 12 mL

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Option A: if D was removed, the equilibrium would have shifted towards the product as D lies on the product side of the equation.

An equilibrium may be stressed in a number of ways. One method is to change the reactant or product of a chemical process when it reaches equilibrium. To lessen the stress, adding more product causes the equilibrium to switch to reactants. If a reactant or product is taken away, the equilibrium changes to produce more of the taken away reactant or product, respectively.

The chemical process is no longer at equilibrium when we stress it, and it begins to move back towards equilibrium in a way that reduces the stress. The formal formulation is termed Le Chatelier's principle: If an equilibrium is stressed, then the reaction moves to decrease the stress.

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Correct question is:

For the following reaction, determine which way the equilibrium would shift, toward the products or toward the reactants, given the proposed change. Assume the reaction is endothermic.

A + B → C + D

Part A: If D was removed

Part B: If more B was added to the reaction

Part C: If the reaction was heated

The structure of organic compounds allows them to function as pigments through chromophore and acid or basic groups.

This is defined as a colored substance which is completely or nearly insoluble in water.

The structure of organic compounds allows them to function as pigments include chromophore and the acid or basic groups such as OH, SO3H, etc.

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Answer:

The blanks can be completed with words in the following sequence

1) elements

compound

2) atom

3) matter

4) compound

5) chemistry

6) reactants

product

Explanation:

In H2SO4, atoms of hydrogen, sulphur and oxygen represent different elements that are combined to form the compound.

The smallest indivisible unit of matter that still retains all the properties of matter is an atom. Matter is anything that has weight and occupy space.

Atoms combine in fixed ratios to form compounds. Chemistry studies matter scientifically and pays specific attention to the changes that matter undergoes.

Considering the reaction of photosynthesis, water and carbon dioxide combine to give glucose so the water and carbon dioxide  are reactants while the glucose is the product of the reaction.

Aluminum is in Period 3 because its electron configuration, [Ne] 3s2 3p1, indicates that its highest energy level is the third shell, corresponding to Period 3 in the periodic table.

The electron configuration of aluminum, with atomic number 13, is [Ne] 3s2 3p1. This indicates that aluminum has a total of 13 electrons distributed among its energy levels. The [Ne] represents the noble gas neon, which has the electron configuration 1s2 2s2 2p6. This noble gas configuration is used to represent the filled inner electron shells of aluminum. The remaining electron configuration, 3s2 3p1, shows that aluminum has two electrons in the 3s orbital and one electron in the 3p orbital. This arrangement of electrons follows the Aufbau principle, which states that electrons fill the lowest energy orbitals first before moving to higher energy orbitals. The period of an element in the periodic table corresponds to the highest principal energy level (shell) in its electron configuration. Since aluminum's highest principal energy level is the third shell (3s and 3p orbitals), it is located in Period 3 of the periodic table.

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The theoretical yield of solid silver in this reaction, starting with exactly 5.00 g of AgNO3, is 1.06 g Ag. This assumes perfect reaction conditions and complete conversion of reactants to products, which may not always be the case in reality.

To calculate the theoretical yield of solid silver in this reaction, we first need to balance the chemical equation:
3AgNO3 (aq) + Al (s) --> 3Ag (s) + Al(NO3)3 (aq)
Now we can see that the stoichiometry of the reaction is 3:1 for AgNO3 to Ag. This means that for every 3 moles of AgNO3 that react, 1 mole of Ag will be produced.

To calculate the theoretical yield, we need to convert 5.00 g of AgNO3 to moles. The molar mass of AgNO3 is 169.87 g/mol, so:
5.00 g AgNO3 x (1 mol AgNO3 / 169.87 g AgNO3) = 0.0294 mol AgNO3
since the stoichiometry of the reaction is 3:1 for AgNO3 to Ag, we can calculate the number of moles of Ag that would be produced:
0.0294 mol AgNO3 x (1 mol Ag / 3 mol AgNO3) = 0.00980 mol Ag
Finally, we can convert the moles of Ag to grams using the molar mass of Ag, which is 107.87 g/mol:
0.00980 mol Ag x (107.87 g Ag / 1 mol Ag) = 1.06 g Ag (rounded to two significant figures)

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Following C12H24012's complete combustion, the following occurs:

C12H24012 + 19O2 → 12CO2 + 24H2O

The amount of carbon dioxide produced is 12 grams.

What is the mass conservation law?

The Law of Conservation of Mass, which states that mass neither creates nor destroys in a chemical reaction, is used in this question.

Steps in this instance are listed below.

1. Calculate C12H24012's molecular weight:

In order to determine the number of moles, divide the given mass of 25.8 g by the molar mass of C12H24012, which is 264 g/mol:

264 g/mol/25.8 g C12H24012 = 0.097 mol

2. Calculate the required oxygen moles:

There are 19 moles of oxygen needed for every mole of C12H24012. In order to determine the necessary amount of oxygen, multiply 0.097 mol by 19:

19 mol O2/1 mol C12H24012 x 0.097 mol C12H24012 = 1.833 mol O2

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Answer:

M has lost an electron, one electron, and given it to Mt

Explanation:

Chemical change: A chemical reaction is the change of one chemical substance into another chemical substance. For instance: The rusting of iron, the curdling of milk, the digestion of food, breathing, etc.

What is a chemical reaction?

A chemical reaction is the change of one chemical substance into another chemical substance.

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Chemical  change is the change  chemical substance is transformed into another chemical substance.It is irreversible in  nature , for example Reaction of medicine in body , milk to curd etc.

1)Physical change temporary or reversible in nature but chemical change is irreversible in nature

2)In physical change there no new product is formed but in chemical change there formation of new product takes .

3) Physical change is change sin shape ,size or state for example freezing of water , melting of wax , and example of  Chemical change are Burning of  coal, digestion of food

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There are 1.31 x 1022 bromide ions in 2.00 g of \(MgBr_2\).

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The correct hybridization for each central atom is:

HCN: sp hybridization.

PF3: sp3 hybridization.

BrF3: sp3d hybridization

SO2²-: sp2 hybridization

HCN: sp hybridization. The central atom carbon forms three sigma bonds with hydrogen, nitrogen, and carbon, requiring three hybrid orbitals. One electron pair is left unhybridized in a p orbital.

PF3: sp3 hybridization. The central atom phosphorus forms three sigma bonds with fluorine and one lone pair, necessitating four hybrid orbitals.

BrF3: sp3d hybridization. The central atom bromine forms three sigma bonds with fluorine and has two lone pairs. It requires five hybrid orbitals for bonding.

SO2²-: sp2 hybridization. The central atom sulfur forms two sigma bonds with oxygen and has one lone pair, requiring three hybrid orbitals. The molecule has a trigonal planar shape.

Hybridization describes the mixing of atomic orbitals to form new hybrid orbitals, allowing for the arrangement of electron pairs and bonding. The number and type of sigma bonds and lone pairs on the central atom determine its hybridization.

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Answer:

The water cycle is driven primarily by the energy from the sun.

Answer:

Bacteria, Archaea and Eukarya are the three domains of life.

Answer:

54L

Explanation:

Answer:

a.

Na2CO3 (aq) + 2 HCl (aq) → H2O (l) + CO2 (g) + 2 NaCl (aq)

b.

0.0783 mols of HCl

Explanation:

Na2CO3 (aq) + 2 HCl (aq) → H2O (l) + CO2 (g) + 2 NaCl (aq)

n= 1 n= 2

Mr = 106 Mr= 36.5

m= 106g m= 73g

106 g Na2CO3 reacts with 73 g HCl

1 g Na2CO3 will react with 73/106 g HCl

4.15 g Na2CO3 will react with (73/106)× 4.15 = 2.858 g HCl

number of moles = mass/ Mr

num of moles of HCL = 2.858/36.5

= 0.07830188678

= 0.0783 mols

a. Balanced equation with state symbols:

Solid sodium carbonate (Na₂CO₃(s)) + Aqueous hydrochloric acid (2HCl(aq)) = Aqueous sodium chloride (2NaCl(aq)) + Carbon dioxide (CO₂(g)) + Water (H₂O(l))

b. 0.05 moles of HCl is required to react with 4.15 g of sodium carbonate.

To calculate the number of moles of hydrochloric acid (HCl) required to react with 4.15 g of sodium carbonate (Na₂CO₃), we first need to determine the molar mass of Na₂CO₃.

Molar mass of Na₂CO₃:

2(Na) + 1(C) + 3(O) = 2(23.0 g/mol) + 12.0 g/mol + 3(16.0 g/mol) = 46.0 g/mol + 12.0 g/mol + 48.0 g/mol = 106.0 g/mol

Next, we can use the given mass and molar mass to calculate the number of moles of Na₂CO₃:

Number of moles = Mass / Molar mass

Number of moles = 4.15 g / 106.0 g/mol ≈ 0.0391 moles

According to the balanced equation, 1 mole of Na₂CO₃ reacts with 2 moles of HCl. Therefore, the number of moles of HCl required to react with 0.0391 moles of Na₂CO₃ is:

Number of moles of HCl = 2 × 0.0391 moles ≈ 0.0782 moles

Thus, 0.0782 moles of HCl (or approximately 0.05 moles when rounded to two decimal places) are required to react exactly with 4.15 g of sodium carbonate.

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Answer:

Explanation:

The trick here is to realize that if you know the volume of a gas at STP, you can use the fact that

1

mole of any ideal gas occupies

22.7 L

under STP conditions to calculate how many moles of gas you have in your sample.

Under STP conditions:

1 mole of an ideal gas = 22.7 L

−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−

In your case, you know that your sample of gas occupies

2.28 L

under STP conditions, which are currently defined as a pressure of

100 kPa

and a temperature of

0

∘

C

.

This means that your sample will contain

2.28

L

⋅

molar volume of a gas at STP



1 mole gas

22.7

L

=

0.10044 moles gas

Now, the molar mass of the gas is the mass of exactly

1

mole of the gas. In your case, you know that you get

3.78 g

for every

0.10044

moles, which means that you have

1

mole

⋅

3.78 g

0.10044

moles

=

37.6 g

Since this is the mass of

1

mole of gas, you can say that the molar mass of the gas is

molar mass = 37.6 g mol

−

1

−−−−−−−−−−−−−−−−−−−−−−−

False. Not all chemical compounds have isomers, which are molecules with the same molecular formula but different structural arrangements. Isomers only occur in certain cases where a molecule's atoms can be rearranged to create different structures with distinct properties.

The same molecular formula applies to structural isomers and other types of isomers, which are also chemical substances. It follows that these substances have the same molar mass because they share the same molecular formula.

When a substance has the same molecular formula but a different structural makeup, it is an isomer. They make up the group known as stereoisomers, or spatial isomers, which also includes optical isomers where isomers only differ in the spatial arrangement of their atoms.

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The correct statement about Dunite is that it is formed when magma cooled slowly below the ground; Option B.

Rocks are large aggregates of minerals that occur in the earth's crusts as a result of the cooling ad solidification of molten magma or the deposition of the remains of dead organic matter which changes from pressure ad heat.

There are three types of rocks, and they are:

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