How many mass would be contained in 0.01mol of NaOH

Answer:

helium i think

Explanation:

The  milligrams of propanol should be given for each dose is 101.25 mg.

We know that drug is a chemical that is taken into the body to achieve a particular end which is to stop sickness. The amount at which drug should be given is called the dose of the drug.

The mass of the patient is 75 pounds we have to convert this weight to kilograms.

1 pound = 0.45 Kg

75 pounds = 75 pounds * 0.45 Kg/1 pound

= 33.75 Kg

If the dose is 3 mg per kilogram then;

3 mg should be given for 1 kilogram of body mass

x mg should be given for 33.75 Kg of body mass

x = 3 mg  * 33.75 Kg / 1 kilogram

= 101.25 mg

Hence, milligrams of propanol should be given for each dose is 101.25 mg.

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Answer:

electron are the partials which float around the nucleus

Answer:

salt water

Explanation:

beacuse it is made up of 2 elements,NaCl and H2O

Answer:

Based on the mass number of an element, one can determine the number of neutrons that element has. The identity of an element implies its number of protons, and thus one can subtract atomic number from mass number to determine the number of neutrons in the atom's nucleus.

Answer:

Explanation:

SrH₂ + 2H₂O = Sr(OH)₂ + 2H₂

90gm     36gm                  2 moles

5.64 g        4.7 g

water required for 5.64 g of SrH₂ = (36/ 90) x 5.64 g

= 2.256 g

water is in excess . Hence limiting reagent is SrH₂

90g SrH₂  makes 2 mole of water

5.64g SrH₂ makes water equal to mole = 2 x 5.64 / 90

= .125 mole .

mole of hydrogen formed = .125 .

The pressure, in atmospheres, exerted by a 0.100 mol sample of oxygen in a 2.00 L container at 273 °C is 2.24 × 10⁰ atm.

The pressure of a substance can be calculated using the following formula;

PV = nRT

According to this question, the pressure, in atmospheres, exerted by a 0.100 mol sample of oxygen in a 2.00 L container at 273 °C can be calculated as follows:

P × 2 = 0.1 × 0.0821 × 546

2P = 4.48266

P = 2.24 × 10⁰ atm

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Answer:

Metalloids and ions

Explanation:

Mercury is not solid at room temperature. (Metals)

Many nonmetals aren't good at conducting electricity. Oxygen for example. (Nonmetals)

Metalloids are always solid at room temp and are fair conductors. (Metalloids)

Ions are same as metalloids. (Ions)

PLS GIVE BRAINLIEST

Group 8 elements are also known as the noble gasses. These elements already have a full valence shell with 8 valence electrons. This leaves the elements non-reactive as they are already stable and in a low energy state.

In certain fireworks, potassium nitrate breaks down into potassium oxide, nitrogen, and oxygen. This is an example of a combustion reaction. The opposite process is a synthesis reaction

fireworks are a class of low explosive devices used for aesthetic and entertainment purposes

Here potassium nitrate is break down into the potassium oxide and nitrogen and oxygen which decomposes is by given burning it is also combustion reaction and the synthesis reaction is opposite to this reaction

2KNO₃ → 2KNO₂ + O₂

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Conjugate acid-base pair is the combination of two compounds which can accept and donate hydrogen ions.

The compounds are HCI, H₂SO₄, HPO, Acetic acid, Formic Acid, HF, carbonic acid, ammonium ion, water, nitric acid.

a.

Conjugate bases of HCl is Cl⁻.

Conjugate bases of H₂SO₄ is HSO₄⁻.

Conjugate bases of HPO₄²⁻ is PO₄³⁻.

Conjugate bases of CH₃COOH is CH₃COO⁻.

Conjugate bases of formic acid is formate ion.

Conjugate bases of HF is F⁻.

Conjugate bases of carbonic acid is the bicarbonate.

Conjugate bases of ammonium ion ammonia.

Conjugate bases of water is H₃O⁺.

Conjugate bases of HNO₃ is NO₃⁻.

b.

HCl ⇄ H⁺ + Cl⁻

H₂SO₄ ⇄ 2H⁺ + SO₄²⁻

H₃PO₄ ⇄ H⁺ + PO₄³

CH₃COOH ⇄ H⁺ + CH₃COO⁻

HCOOH ⇄ H⁺ + HCOO⁻

HF ⇄ H⁺ + F⁻

H₂CO₃ + H₂O ⇄ HCO₃⁻ + H₃O⁺

Ammonia does not ionizes in water.

H₂O ⇄ H₃O⁺ + OH⁻

HNO₃ ⇄ H⁺ + NO₃⁻

c.

Strong acids: HCl, H₂SO₄, HNO₃,

Weak acids: H₃PO₄, CH₃COOH, HCOOH, HF, H₂CO₃, ammonium ion

Water is both weak and strong acid.

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Answer:

Which best describes a codon? 1. a cell structure that gives the master instructions for an organism 2. a segment of DNA that is the basis of heredity in organisms 3. the sequence of three bases that codes for a specific amino acid 4. the basic unit of structure and function of all living things

Answer:

The Correct answer is C

Explanation:

The sequence of three bases which codes for a specified amino acid.

The equation C2H4(g) + H2(g) + C2H6(g) → Caco3(s) + Cao(s) + CO2(g) shows an increase in entropy due to the formation of a gas as a product. Option A

In this equation, the reactants on the left-hand side consist of gases (C2H4 and H2), while the products on the right-hand side include a solid (Caco3) and a gas (CO2).

When a reaction involves a change from gaseous to solid or liquid states, there is typically a decrease in entropy because the particles become more ordered and constrained in the solid or liquid phase.

Conversely, when a reaction involves the formation of gases, there is generally an increase in entropy because gases have higher degrees of molecular motion and greater freedom of movement compared to solids or liquids.

In the given equation, the reactants include three gaseous compounds (C2H4, H2, and C2H6), and one of the products is a gas (CO2). Therefore, the overall entropy of the system increases during this reaction.

The equation Fe(s) + S(s) → FeS(s) does not show an increase in entropy. Both the reactants (Fe and S) and the product (FeS) are solids. Since solids have lower entropy compared to gases or liquids, the entropy of the system does not increase in this reaction. Option A

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Answer:

Explanation: reaction is 2 Na(s) + 2 H2O (l) ⇒ 2 NaOH (aq) + H2(g)

Answer:look at the picture below

Explanation:

The empirical formula of polyethylene can be determined by converting the given percentages of carbon (C) and hydrogen (H) into grams. To find the grams of each element, we assume a 100.0 g sample of polyethylene.

For carbon:

Mass of carbon = 86.0% × 100.0 g = 86.0 g

For hydrogen:

Mass of hydrogen = 14.0% × 100.0 g = 14.0 g

Therefore, in a 100.0 g sample of polyethylene, there are 86.0 grams of carbon and 14.0 grams of hydrogen.

The empirical formula of a compound represents the simplest whole-number ratio of atoms present in the compound. To determine the empirical formula, we need to find the ratio of carbon to hydrogen in terms of moles.

First, we convert the masses of carbon and hydrogen into moles using their respective molar masses. The molar mass of carbon is approximately 12.01 g/mol, and the molar mass of hydrogen is approximately 1.008 g/mol.

Number of moles of carbon = 86.0 g / 12.01 g/mol ≈ 7.162 mol

Number of moles of hydrogen = 14.0 g / 1.008 g/mol ≈ 13.89 mol

Next, we divide the number of moles of each element by the smallest number of moles to get a simplified ratio.

Carbon: Hydrogen ≈ 7.162 mol : 13.89 mol ≈ 1 : 1.939

Since we want to express the ratio in whole numbers, we multiply both sides by 2 to get a whole number ratio.

Carbon: Hydrogen ≈ 2 : 3.878

Rounding to the nearest whole number, we find that the empirical formula of polyethylene is CH₂.

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Answer:

B

Explanation:

Answer:

a form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.

Explanation:

During photosynthesis green plants use solar energy to produce fuel hence 'Energy in the form of sunlight must be added' that is option D is the correct option.

Photosynthesis is an endothermic reaction because green plants use solar energy in the form of sunlight, along with water and carbon dioxide in the air, to produce their food in the form of glucose.

Endothermic reactions are chemical reactions where the reactants utilize heat energy from the surroundings to form products.

Since energy as sunlight is used in the photosynthesis reaction, 'Energy in the form of sunlight must be added' that is option D is the correct option.

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The empirical mass of the compound, given that the molecular formula of the compound is N₂O₂, is 60 g/mol

First, we must understand here that empirical mass of a compound is simply the molar mass of the compound.

This means that if we obtain the molar mass of a compound, then we have equally obtain the empirical mass of the compound.

Now, we shall obtain the molar mass of the compound. Details below:

Molar mass of N₂O₂ = (14 × 2) + (16 × 2)

Molar mass of N₂O₂ = 28 + 32

Molar mass of N₂O₂ = 60 g/mol

From the above, the molar mass of the compound is 60 g/mol

Thus, we can conclude that the empirical mass of the compound is 60 g/mol

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       The quantity of protons in an atom's nucleus is known as the atomic number. The number of protons determines an element's identity (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).

Answer :A. Atomic number

        The number of protons in an atom determines its atomic number, and isotopes have the same atomic number but different numbers of neutrons.

           All isotopes of a given element have the same atomic number because they all have the same amount of protons (for example, the atomic number of helium is always 2).

          An isotope is one of two or more chemical elements that exist in different forms. Varied isotopes of an element share the same atomic number and protons in their nuclei, giving them the same atomic weight. However, each elemental isotope has a different amount of neutrons, which changes its atomic weight.

The two chlorine isotopes that are found in nature are represented by the symbols 3517Cl and 3717Cl.

The elements hydrogen, deuterium, and tritium each have one isotope.

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water is known as the mixture

Answer:

iv. Iron

water is not a mixture

hydrogen is the simplest element

air is pure

The R/S isomer is decided on the basis of the attached group atomic number to chiral atom.

the R/S configuration is the nomenclature used to describe the enantiomer of chiral molecules. The absolute configuration of chiral substances is another name for this arrangement. the atom attached to the chiral centre is marked based on atomic number. Higher atomic number objects will be given lesser numbers. Place the chiral centre so that the atom with the lowest priority is pointed away from the observer. The absolute configuration is R if the arrow moves in a clockwise direction. Additionally, the absolute configuration is S if the arrow is moving anticlockwise. This is followed when the lower priority group are present in a vertical position and reversed is followed in case of the horizontal direction.

Hence, absolute configuration directly influenced by priority group

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The connected group atomic number to the chiral atom determines the R/S isomer.

The enantiomer of chiral compounds is designated by the nomenclature R/S configuration. Another name for this configuration is the absolute configuration of chiral compounds. Based on its atomic number, the atom that is joined to the chiral center is identified. Lesser numbers will be assigned to items with higher atomic numbers. Put the chiral center in such a way that the atom with the lowest priority faces the viewer. If the arrow turns clockwise, the absolute configuration is R. Additionally, if the arrow is travelling counterclockwise, the absolute configuration is S. When the lower priority group is present and is positioned vertically, this happens.

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The balanced equation is: 4 \(H_2S\)+ 3 \(O_2\)→ 4 \(SO_2\)+ 8 \(H_2O\)

The given chemical equation is unbalanced. To balance it, we need to adjust the coefficients in front of each chemical species until the number of atoms on both sides of the equation is equal.

The unbalanced equation is:

2 \(H_2S\)+ 3 \(O_2\)→ \(SO_2\)

Let's start by balancing the sulfur (S) atoms. We have two sulfur atoms on the left side and one sulfur atom on the right side. To balance the sulfur, we can place a coefficient of 2 in front of the \(SO_2\):

2 \(H_2S\)+ 3 \(O_2\)→ 2 \(SO_2\)

Now, let's balance the hydrogen (H) atoms. We have four hydrogen atoms on the left side (2 from each \(H_2S\)) and none on the right side. To balance the hydrogen, we can place a coefficient of 4 in front of the water (H2O) on the right side:

2 \(H_2S\)+ 3 \(O_2\)→ 2 \(SO_2\)+ 4 \(H_2O\)

Finally, let's balance the oxygen (O) atoms. We have six oxygen atoms on the right side (3 from \(O_2\) and 3 from 2 \(SO_2\)) and three on the left side (2 from \(H_2S\)). To balance the oxygen, we can place a coefficient of 3/2 in front of the O2:

2 \(H_2S\)+ (3/2) \(O_2\)→ 2 \(SO_2\)+ 4 \(H_2O\)

To remove the fractional coefficient, we can multiply all coefficients by 2:

4 \(H_2S\) + 3 \(O_2\)→ 4 \(SO_2\)+ 8 \(H_2O\)

Now the equation is balanced, with an equal number of atoms on both sides. The balanced equation is:

4 \(H_2S\)+ 3 \(O_2\)→ 4 \(SO_2\)+ 8 \(H_2O\)

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Answer:

can someone please do this and put the answers below !!!!

Explanation:

Answer:

NaF sodium flouride

Explanation:

The theoretical yield of Acetylsalicylic acid is found out to be: 3.01 grams.

The limiting reagent is a substance that prevents a chemical reaction from occurring completely.

When a limiting reagent is used in a chemical reaction, the atoms, molecules, or ions of the other reactant that it (the limiting reagent) reacts with will either stay free or unreacted.

Popular compounds called acids and bases interact with one another to create salt and water. The Latin word "acere," which meaning "sour," is where the term "acid" originates.

According to the problem, we have 2.31 grams of salicylic acid. We need to determine the theoretical yield of acetylsalicylic acid.

The molar mass of salicylic acid is 138.12 g/mol. Therefore, the number of moles of salicylic acid we have is:

n = mass / molar mass

n = 2.31 g / 138.12 g/mol

n = 0.0167 mol

According to the balanced equation, 1 mole of salicylic acid reacts with 1 mole of acetic anhydride to produce 1 mole of acetylsalicylic acid. Therefore, the number of moles of acetylsalicylic acid produced is also 0.0167 mol.

The molar mass of acetylsalicylic acid is 180.16 g/mol. Therefore, the theoretical yield of acetylsalicylic acid is:

mass = n x molar mass

mass = 0.0167 mol x 180.16 g/mol

mass = 3.01 g

Therefore, the theoretical yield of acetylsalicylic acid is 3.01 grams.

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Answer:

Extent of reaction = 95.9 mol.

Fractional conversion of the limiting reactant = 0.846.

Percentage by which the other reactant is in excess = 25.2 %.

Explanation:

Hello.

In this case, for the undergoing chemical reaction:

\(CH_2=CH_2+HBr\rightarrow CH_3-CH_2Br\)

We can write the mole balance per species also including the extent of the reaction:

\(CH_2=CH_2:A\\\\HBr: B\\\\CH_3-CH_2-Br:C\)

\(x_AP=z_AF-\epsilon \\\\x_BP=z_BF-\epsilon \\\\x_CP=\epsilon\)

Considering that P is the flow of the outlet product. In such a way, writing the data we know, we can write:

\(0.33P=z_A*265-\epsilon \\\\0.103P=z_B*265-\epsilon \\\\0.567P=\epsilon\)

Whereas we can replace the C2H5Br mole balance in the others mole balances:

\(0.33P=z_A*265-0.567P \\\\0.103P=z_B*265-0.567P\\\\\\z_A*265-0.897P=0\\\\z_B*265-0.67P=0\)

By knowing that \(z_B=1-z_A\), we can write:

\(z_A*265-0.897P=0\\\\(1-z_A)*265-0.67P=0\\\\\\z_A*265-0.897P=0\\\\-z_A*265-0.67P=-265\)

Thus, solving for P and \(z_A\), we obtain:

\(z_A=0.572\\\\P=169.11mol\)

It means that the extent of the reaction is:

\(\epsilon=0.567P=0.567*169.11mol\\\\\epsilon=95.9mol\)

For the limiting reactant, due to the 1:1 mole ratio between the reactants, it is the one having the smallest flow rate:

\(F_A=0.572*265mol=151.58mol\\\\F_B=265mol-151.58mol=113.42mol\)

It means that the limiting reactant is B which is HBr, whose fractional conversion is:

\(X_B=1-\frac{0.103*169.11}{113.42mol}\\ \\X_B=0.846\)

Finally, the percentage by which the other reactant is in excess, corresponds to:

\(\% excess =(1-\frac{113.42mol}{151.58mol})*100\%\\ \\\%excess=25.2\%\)

Regards.

Molar concentration of Zn2+ions in a solution is 3.481 mol/lit

The electrode potential value is 59mV

Temperature=298k

What is electrode potential?

equation formed- Zn → Zn2+ + 2e

              from Nernst equation-

E=E cell - 0.059 log [Zn2+]

[zn2+]=3.481 mol/lit

hence, Molar concentration of Zn2+ions in a solution is 3.481 mol/lit

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