3. The density of C₂H4 (OH)₂ is 1.09 g/me. How Many gram of C₂H4 (OH)2 Should be Mixed With 375 ml of Water to make a 7.50% by Mixture?​

Hence, the new pressure of the neon gas is 833.3 mm Hg.

To calculate the new pressure, we apply Boyle's law

Boyle's law state that, at a constant temperature, the volume of a given mass of gas is inversely proportional to its pressure.

Formula:

Where:

Make P' the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, the new pressure of the neon gas is 833.3 mm Hg.

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D. The option that is formed by the process of fusion in stars is elements.

When the new star reaches a certain size, a process called nuclear fusion ignites, generating the star's vast energy.

The fusion process forces hydrogen atoms together, transforming them into heavier elements such as;

Thus, the option that is formed by the process of fusion in stars is elements.

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6. 1 \(SO_{3}\) + 1 \(H_{2}O\) --> 1 \(H_{2} SO_{4}\)

8. 1 \(K_{2}O\) + 1 \(H_{2}O\) --> 2 KOH

12. 1 \(CdSO_{4}\) + 1 \(H_{2} S\) --> 1 CdS + 1 \(H_{2} SO_{4}\)

The reaction C₆H₅COOH(aq) + C₆H₅NH₂(aq) ⇌ C₆H₅COO⁻(aq) + C₆H₅NH₃⁺(aq) has an equilibrium constant of 0.3698.

The equilibrium constant (Kb) for the reaction can be calculated using the Ka and Kb values of the reactants and the equation:

Kw = Ka x Kb

where Kw = ion product constant of water (1.0 x 10⁻¹⁴ at 25°C).

Calculate the Kb value for aniline:

Kb = Kw/Ka = (1.0 x 10⁻¹⁴)/(4.3 x 10⁻¹⁰) = 2.33 x 10⁻⁵

Use the Kb value for aniline and the Ka value for benzoic acid to calculate the equilibrium constant (K) for the reaction:

K = Kb/Ka = (2.33 x 10⁻⁵)/(6.3 x 10⁻⁵) = 0.3698

Therefore, the equilibrium constant for the reaction C₆H₅COOH(aq) + C₆H₅NH₂(aq) ⇌ C₆H₅COO⁻(aq) + C₆H₅NH₃⁺(aq) is 0.3698.

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The shells are present outside the nucleus of an atom, where the electrons are said to be present. The atom of Mg²⁺ has a full outer shell. Thus, option C is correct.

An atom is the unit of the molecule that comprises sub-atomic particles, electrons, protons, and neutrons. The electron is present in the shells of the atom and can be completely filled by forming the bonds.

Magnesium has atomic number 12 and its electronic configuration is given as 2, 8, 2. When it gives or donates 2 electrons it becomes positively charged and now has completely filled outer shell.

Therefore, option C. Mg²⁺ has a full outer shell.

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Answer:

Examples. Glucose (C6H12O6), ribose (C5H10O5), Acetic acid (C2H4O2), and formaldehyde (CH2O) all have different molecular formulas but the same empirical formula: CH2O.

Explanation:In chemistry, the empirical formula of a chemical compound is the simplest positive integer ratio of atoms present in a compound.

The properties of a natural resource that make it useful for humans as a material or energy source is the ability to convert mass into energy and vice versa.

The expression natural resources make reference to all types of matter and energy extracted from nature that can be used to produce goods and services.

Some examples of natural resources include for example irreversible resources such as fossil fuels (i.e., oil, or coal, gas, minerals such as metals, rocks, etc) as well as those based on the use of reversible energy such as eolic air energy, solar radiation or sunlight, soil and hydric resources or water.

Therefore, with this data, we can see that natural resources can be defined as any material and or energy obtained from nature that may be irreversible or reversibly used to produce goods and services.

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Answer:

Hi, There! the Correct Answer is below!

C.)interactions between humans and living and non-living things in the environment

Explanation:

Environmental scientists study subjects like the understanding of earth processes, evaluating alternative energy systems, pollution control and mitigation, natural resource management, and the effects of global climate change. ... Environmental scientists bring a systems approach to the analysis of environmental problems.

____________________________________________________________

Have a wonderful Day :)

~Darkspirit~

Answer:

interactions between human and living and non living things in the environment

Answer:

the answer is A

Explanation:

edg 2020

Answer:

the air above a wildfire/A

Explanation:

Answer:

CO₂ + 4 H₂S + O₂ ---> CH₂O + 4 S + 3 H₂O

Explanation:

The unbalanced equation looks like this:

CO₂ + H₂S + O₂ ---> CH₂O + S + H₂O

Below is the amount of each element on each side of the reaction.

Reactants:

    > 1 carbon, 2 hydrogens, 1 sulfur, 4 oxygens

Products:

    > 1 carbon, 4 hydrogens, 1 sulfur, 2 oxygens

As you can see, there is a differing amount of hydrogens and oxygens on both sides. The balanced equation looks like this:

1 CO₂ + 4 H₂S + 1 O₂ ---> 1 CH₂O + 4 S + 3 H₂O

Below is the amount of each element on each side of the reaction.

Reactants:

    > 1 carbon, 8 hydrogens, 4 sulfurs, 4 oxygens

Products:

    > 1 carbon, 8 hydrogens, 4 sulfurs, 4 oxygens

Answer:

A - right shift

B - no shift

C - right shift

Explanation:

According to Le Chatelier's principle, when a reaction is in equilibrium and one of the factors affecting the rate of reaction is introduced, the equilibrium will shift so as to annul the effects of the constraint.

In this case, decreasing the volume of the reaction's container is equivalent to increasing the pressure of the reaction. When pressure is increased, the reaction will shift towards the side with a lower number of moles.

In A, the total number of moles on the left-hand side of the reaction is two while it is one on the right-hand side. An increase in pressure will, therefore, see the equilibrium shifting to the right-hand side.

In B, the total number of moles on both the right and the left-hand side is two each. An increase in the pressure will have no effect on the equilibrium.

In C, the total number of moles on the left-hand side is two while it is one on the right-hand side. Hence, an increase in the pressure of the reaction will cause a shift in the equilibrium to the right.

Neon is the tenth element with a total of 10 electrons. So, the correct atom is neon.

The equilibrium constant for the reaction given that the equilibrium concentration of [PH₃] = 0.250 M, [H₂] = 0.580 M, and [P₄] = 0.750 M is 7.3

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

The equilibrium constant for the reaction can be obtained as shown below:

Equilibrium constant = [Product]ᵐ / [Reactant]ⁿ

Where

Equilibrium constant = [H₂]⁶[P₄] / [PH₃]⁴

Equilibrium constant = [(0.580)⁶ × 0.750] / (0.250)⁴

Equilibrium constant = 7.3

Thus, the equilibrium constant for the reaction is 7.3

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The mass of chlorine gas product formed is 61.4 g.

What is the mass ?

First, we need to determine which reactant is limiting and which is in excess. To do this, we can use the given mass of HCl and convert it to moles:

63.2 g HCl × (1 mol HCl/36.46 g HCl) = 1.73 mol HCl

Next, we can use stoichiometry to determine how many moles of \(Cl_{2}\) will be produced from 1.73 mol of HCl:

1.73 mol HCl × (2 mol \(Cl_{2}\)/4 mol HCl) = 0.865 mol \(Cl_{2}\)

Finally, we can convert the moles of \(Cl_{2}\) to grams using its molar mass:

0.865 mol \(Cl_{2}\) × (70.91 g \(Cl_{2}\)/1 mol \(Cl_{2}\)) = 61.4 g \(Cl_{2}\)

Therefore, the mass of chlorine gas product formed is 61.4 g.

What is stoichiometry ?

Stoichiometry is a branch of chemistry that deals with the calculation of the quantities of reactants and products involved in a chemical reaction. It involves using balanced chemical equations to calculate the amounts of reactants required to produce a certain amount of product, or the amount of product that can be obtained from a given amount of reactant. Stoichiometry is an important tool for predicting the outcomes of chemical reactions and for designing chemical processes in industry.

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The ph value of human saliva is between 6.2-7.6 with 6.7 being the average pH

ph value of human saliva is 7 and 6

These two investigations are similar because they follow the steps of the scientific method; however, their purpose and methodology are different.

To begin, both investigations follow the scientific method as both investigators have a question or a hypothesis about a natural phenomenon, and due to this, they both decide to use an objective experiment to better understand the phenomenon they are interested in.

Even if both investigations follow the scientific method, there are some differences, these differences include:

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Answer:

7

ans: Fruit Salad

8

ans: The components were completely dissolved

The formula of the compound is most likely AB2 or A₂B, depending on whether the cations occupy half or all of the tetrahedral voids, respectively. Option 2 or 4.

To determine the formula of the compound, we need to consider the ratio of the cations to anions in the crystal structure.

In an hcp lattice, each anion is surrounded by six cations in an octahedral arrangement. The tetrahedral voids are located in the gaps between four close-packed spheres and are surrounded by six anions. Each tetrahedral void can accommodate one cation.

Let's consider each option:

LAB: This formula suggests that there is one cation A for every one anion B. However, if we assume that all the tetrahedral voids are occupied by cations, then the ratio of cations to anions would be 2:3, which is not consistent with the formula LAB.

AB2: This formula suggests that there are two cations A for every one anion B. If we assume that half of the tetrahedral voids are occupied by cations, then the ratio of cations to anions would be 2:3, which is consistent with the formula AB2.

ABA: This formula suggests that there is one cation A for every two anions B. If we assume that all the tetrahedral voids are occupied by cations, then the ratio of cations to anions would be 1:1, which is not consistent with the formula ABA.

A₂B: This formula suggests that there are two cations A for every one anion B. If we assume that all the tetrahedral voids are occupied by cations, then the ratio of cations to anions would be 2:1, which is consistent with the formula A₂B.

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Answer:

0.448 mols

Explanation:

Use balanced equation:

2H2 + O2 -> 2H2O

For every one mole of oxygen, there are two moles of water

hence the molar ratio 1:2

So if there are 0.224 mols of oxygen

Water = 0.224×2

Which is 0.448 mols of H20

About 2.5% of Strontium-90 would remain in the soil at the Trinity Site.

Since the half-life of Strontium-90 is 28.8 years, we can use the formula for radioactive decay to calculate the percentage of Strontium-90 that would remain in the soil after 68 years:

Percentage remaining = (1/2)^(68/28.8) x 100

Solving this equation, we get:

Percentage remaining = 2.5%

This means that after 68 years, only 2.5% of the original amount of Strontium-90 would remain in the soil at the Trinity Site. The rest of the Strontium-90 would have decayed into other elements through radioactive decay. It's important to note that Strontium-90 is a dangerous radioactive isotope that can cause cancer and other health problems if ingested or inhaled, so measures should be taken to prevent people from being exposed to it.

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Answer:

0.5mol

Explanation

Please mark answer as brainliest

The cellulosic ethanol cellulosic ethanol grain ethanol grain ethanol methane are considered biofuels. The two most common biofuels used today are ethanol and biodiesel.

Both of which are the  first generation biofuel technologies. The BETO is working with industry to develop next-generation biofuels from waste, the cellulosic biomass, and algae-based resources. Ethanol (often derived from corn in the United States and sugarcane in Brazil), biodiesel (derived from vegetable oils and liquid animal fats), green diesel (derived from algae and other plant sources), and the biogas are examples of the biofuels (methane derived from animal manure and other digested organic material).

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This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97. The incorrect representation for a neutral atom is 36Li

To determine the correct representation for a neutral atom, we need to consider the atomic number (Z) and mass number (A) of the element. The atomic number represents the number of protons in the nucleus, while the mass number represents the sum of protons and neutrons.

Let's analyze the given representations:

36Li:

This representation suggests that the element is lithium (Li) with a mass number of 36, which is incorrect. The correct mass number for lithium is approximately 6.94.

613C:

This representation suggests that the element is carbon (C) with a mass number of 13, which is correct. Carbon has different isotopes, and 13C represents one of its stable isotopes.

3063Cu:

This representation suggests that the element is copper (Cu) with a mass number of 63, which is correct. Copper has different isotopes, and 63Cu represents one of its stable isotopes.

1530P:

This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97.

Therefore, the incorrect representation for a neutral atom is 36Li, as it does not match the known properties of lithium.

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Explanation:

hybridization refers to the process of mixing atomic orbitals in a way that creates new hybrid orbitals. This is commonly observed in organic chemistry, where hybridization is used to explain the shapes and bonding properties of molecules.

The hybridization of atomic orbitals occurs when atoms bond to form molecules. In the hybridization process, the valence electrons of an atom are rearranged and redistributed in order to form new orbitals with different shapes and energies. This can result in stronger and more stable bonding between atoms.

The most common types of hybridization are sp, sp2, and sp3, which involve the mixing of s and p orbitals. For example, in the sp3 hybridization of carbon, the 2s orbital and three 2p orbitals are combined to form four sp3 hybrid orbitals, which are arranged in a tetrahedral shape.

The effects of hybridization in chemistry include changes in the bond angles, bond lengths, and overall shape of molecules. This can affect the reactivity and chemical properties of the molecule, such as its acidity or basicity.

The statement that accurately describes the photoelectric effect is Shining a HIGH frequency light over a metal will cause ELECTRONS to be ejected. That is option B.

Photoelectric effect is defined as the process by which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation.

The photoelectric effect can also be defined as the ejection of electrons from a metal plate when light falls on it.

Therefore, statement that accurately describes the photoelectric effect is Shining a HIGH frequency light over a metal will cause ELECTRONS to be ejected.

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Hydrochloric acid can cause damage if it comes into contact with your lungs, eyes, stomach, or skin. If hydrochloric acid comes into contact with your skin, it can cause: chemical burns. scarring.

The volume in liters of 5.75 moles of CO₂ at standard temperature and pressure (STP) is 128.88L.

The volume of a given gas at STP can be calculated using the following formula;

PV = nRT

Where;

According to this question, 5.75 moles of CO₂ at standard temperature and pressure (STP). The volume of this gas can be calculated as follows;

At STP, the following applies;

1 × V = 5.75 × 0.0821 × 273

V = 128.88L

Therefore, 128.88L is the volume of the gas.

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The structure of the compound (CH₃)₂CHCH₂CH(CH₃)₂ (2,4-Dimethylpentane) is shown in the attached image.

The compound (CH₃)₂CHCH₂CH(CH₃)₂ is a 2,4-Dimethylpentane.

Iso-octanes or 2,4-Dimethylpentanes have unique qualities that make them ideal tools for measuring gasoline quality. They are hydrocarbon compounds made up of carbon and hydrogen atoms [C7H16] that belong to the class of alkanes.

Clear in color and highly volatile yet stable under typical conditions makes them excellent references for determining gasoline performance via octane ratings.

Interestingly enough, they happen to be one of several structural isomers found within hydrocarbons like octanes which themselves contain several representative molecules at positions along the chain.

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Correct question:

What is the structure for (CH3)2CHCH2CH(CH3)2?

The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Answer:

b. upper mantle

Explanation:

low velocity zone of the upper mantle