HELP ME GUYS ITS DUE IN 7 MINS!
Given the following equation: K2CO3 + 2 HCl → H2O + CO2 + 2 KCl
What would be the percent yield if you reacted 34.5g of K2CO3 and 22.5g of HCl and produced 3.4 g of H2O?
1. calculate the limiting reagent:
2. calculate theoretical yield:
3. calculate percent yield:

Answer:

For any multicellular organism to survive, different cells must work together. The right type of cell must be in the right place to do the work that needs to be done. Organization starts with the cell. Cells in multicellular organisms are specialized for a specific function.

Explanation:

Answer:

Cells in multicellular organisms are organised into tissues and tissues are organised into organs, organs are organised into organ system, and finally, organ systems are organised into an organism

There are 12.044 × 10^23 oxygen molecule present in 2mole of oxygen molecule.

According to the context, the word may as well as may not encompass ions that meet this requirement. A molecule is a collection of two as well as more atoms linked together by the attractive forces described as chemical bonds.

The lowest unit into which a substance could be divided while still being the same substance would be a molecule. It is composed of two as well as more atoms which are chemically bonded to one another.

1 mole of oxygen = 1 O2 molecule

2 mole = 2 O2 molecule = 2 × 6.022 × 10^23 molecule = 12.044 × 10^23 molecule

Thus, 2 mole of oxygen will have 12.044 × 10^23 molecule

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The general equation for the reaction of a halogen with a metal (assuming a 2+ charge on the metal) is: 2M + X₂ → 2MX

In this equation, M represents the metal (with a 2+ charge) and X represents the halogen. The reaction involves the combination of one mole of the metal with one mole of the halogen to form two moles of the metal halide compound (MX).

The 2M on the left side of the equation represents two moles of the metal, each with a 2+ charge. The X₂ represents one mole of the halogen, which exists as a diatomic molecule (e.g., Cl₂, Br₂, I₂).

During the reaction, the metal atoms lose two electrons each to achieve a stable 2+ charge, and the halogen atoms gain one electron each to complete their valence shell. This results in the formation of two moles of the metal halide compound (MX) in which the metal is in its 2+ oxidation state and bonded to the halogen.

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Two protons removed from an oxygen nucleus result in group is carbon

If an atom loses or gain a proton and it become a new element and an element is determined by the number of proton it has in its nucleus and oxygen has 8 so when you remove two proton then element with 6 proton is carbon and a proton is a proton is a subatomic particles found in the nucleus of every atom and the particles has a positive charge and equal and opposite to that of the electron

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O-linked oligosaccharides are commonly attached to the —oh group of amino acids.

Glycosylation is a post-translational modification of proteins in which glyco-linked oligosaccharides are added to proteins. This process is found in eukaryotes, primarily in the endoplasmic reticulum and Golgi apparatus, and involves the enzymatic attachment of sugar units to specific sites on a protein molecule.

These short chains of saccharide sugar residues, called glycosyl sidechains, are examples of glycoconjugates which are covalently attached to hydroxyl groups on the protein.

The most common types of glycosylation sites are the N-linked glycosylation sites, which have an attached sugar group, often an N-acetylglucosamine or N-acetylmannosamine connected to an asparagine sidechain, and the O-linked glycosylation sites, which have a sugar group, usually a galactose or mannose sugar, attached to a hydroxyl group on serine, threonine or hydroxylysine residues.

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Explanation:

The reason why stars are so important is that they have helped humans navigate through Earth. When it was dark these stars would light up the sky giving people lightly. In addition, stars are very important because they make life on Earth. ... Earth would just be a rock with ice.

The pH of a HNO3 solution with a concentration of [4.5 x 10-3] is approximately 2.35.

pH is a measure of the acidity or alkalinity of a solution and is defined as the negative logarithm (base 10) of the hydrogen ion concentration. In this case, we have a HNO3 solution with a concentration of [4.5 x 10-3]. To find the pH, we need to calculate the hydrogen ion concentration first.

The concentration [4.5 x 10-3] represents 4.5 multiplied by 10 raised to the power of -3. Therefore, the hydrogen ion concentration is 4.5 x 10-3 mol/L. Since the pH is the negative logarithm of the hydrogen ion concentration, we can calculate it as follows:

pH = -log10(4.5 x 10-3) ≈ 2.35

Therefore, the pH of the HNO3 solution with a concentration of [4.5 x 10-3] is approximately 2.35.

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Answer:

137.2 L

Explanation:

p1v1 = p2v2

p1v1 / p2 = v2

98 * 35  / 25 = v2 = 137.2 L

To find the volume of the balloon when the atmospheric pressure is 25.0 kPa at a height of about 25 km, we can use Boyle's Law,as per which volume is 137.2 L.

Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.

Boyle's Law equation: P₁  V₁ = P₂  V₂

Given:

P₁= 98.0 kPa (initial pressure of the balloon)

V₁ = 35.0 L (initial volume of the balloon)

P₂ = 25.0 kPa (final atmospheric pressure)

V₂= unknown (final volume of the balloon)

Plugging in the values into Boyle's Law equation, we have:

98.0 kPa × 35.0 L = 25.0 kPa × V₂

To find V₂, we can rearrange the equation:

V₂ = \(\dfrac{98}{35}\times{25}\\=137.2 \ L.\)

Therefore, the volume of the balloon when the atmospheric pressure is 25.0 kPa at a height of about 25 km is approximately 137.2 L.

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Answer:t changes from yellow at pH 3.0 to blue at pH 4.6; this reaction is reversible. Bromophenol blue is structurally related to phenolphthalein (a popular indicator).

...

Acid–base indicator.

Bromophenol blue (pH indicator)

below pH 3.0  above pH 4.6

Explanation:

Answer:

(B) II, IV.

hope this answer is helpful for u.

The mass of oxygen is 128 g

Given that a sample of gas consists of oxygen (molecular mass 32.0 g/mol) and neon (20.0 g/mol). The sample has a mass of 226 g and contains a total of 8.00 moles of gas. We are required to find the mass of oxygen in the sample.

Let us suppose that the number of moles of oxygen is x. Now, we know that the total number of moles of gas is 8 moles. Therefore, the number of moles of neon is (8 - x).

Molar mass of oxygen = 32 g/mol

We can calculate the mass of oxygen from the number of moles of oxygen and molar mass of oxygen as follows:

Number of moles of oxygen × Molar mass of oxygen = Mass of oxygenx × 32 = Mass of oxygen

Let us find the mass of oxygen:

Mass of neon = Total mass of gas – Mass of oxygen

226 – Mass of oxygen = Mass of neon

226 – Mass of oxygen = (8 – x) × 20

Simplifying the equation:

226 – Mass of oxygen = 160 – 20x + x

226 – Mass of oxygen = 160 – 19x

Mass of oxygen = 66 – 19x

The total number of moles of gas is 8 moles

Hence, Number of moles of oxygen + Number of moles of neon = Total number of moles of gasx + (8 - x) = 8⇒ 8 = 8Therefore, the value of x = 4

We can calculate the mass of oxygen as follows:

Number of moles of oxygen × Molar mass of oxygen = Mass of oxygen

4 × 32 = 128 g

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Answer:

It is broken down into water and oxygen

Explanation:

2H2O2 -----> 2H2O +O2

Both 1 mol of sodium chloride and 1 mol of aluminum chloride are made up of 6.02x\(10^{23\) formula units.The correct answer is D.

A) The statement "Both have the same molar mass" is incorrect. Sodium chloride (NaCl) and aluminum chloride (\(AlCl_3\)) have different molar masses. The molar mass of NaCl is approximately 58.44 g/mol, while the molar mass of \(AlCl_3\)is approximately 133.34 g/mol.

B) The statement "Both have the same number of ions" is also incorrect. Sodium chloride consists of one sodium ion (Na+) and one chloride ion (Cl-), while aluminum chloride contains one aluminum ion \((Al^3\)+) and three chloride ions (Cl-). Therefore, they have a different number of ions in their respective formulas.

C) The statement "Both are made up of 6.02x\(10^{23\) molecules" is not accurate. Sodium chloride and aluminum chloride are ionic compounds and do not exist as discrete molecules. Therefore, they cannot be compared based on the number of molecules.

D) The statement "Both are made up of 6.02x\(10^{23\) formula units" is correct. Avogadro's number (6.02x\(10^{23\)) represents the number of particles in 1 mole of a substance. In the case of sodium chloride and aluminum chloride, 1 mol of each compound contains 6.02x\(10^{23\)formula units.

In sodium chloride, there is one formula unit of NaCl per mole, and in aluminum chloride, there are one formula unit of \(AlCl_3\)per mole.

Option D

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The mass of nitrous oxide that can be formed from 50.7 grams of nitrogen is approximately 39.00 grams .

To determine the mass of nitrous oxide that can be formed from 50.7 grams of nitrogen, the balanced chemical equation for the reaction of nitrogen and oxygen to form nitrous oxide is:

N2 + O2 → 2NO

From the balanced chemical equation, it can be observed that the molar ratio of nitrogen to nitrous oxide is 1:1. Therefore, the number of moles of nitrogen (N2) that reacts is equal to the number of moles of nitrous oxide (NO) formed.Mass of nitrogen (N2)

= 50.7 g Molar mass of nitrogen (N2)

= 28.02 g/mol Number of moles of nitrogen (N2)

= Mass/Molar mass

= 50.7/28.02

= 1.81 mol From the balanced chemical equation, it can also be observed that 2 moles of nitrous oxide (NO) are formed from 1 mole of nitrogen (N2). Therefore, the number of moles of nitrous oxide (NO) formed is:Number of moles of nitrous oxide (NO)

= 1/2 x Number of moles of nitrogen (N2)

= 1/2 x 1.81

= 0.905 mol

The mass of nitrous oxide (NO) formed can be calculated using its molar mass as follows:Molar mass of nitrous oxide (NO)

= 44.01 g/mol Mass of nitrous oxide (NO)

= Number of moles x Molar mass

= 0.905 x 44.01

= 39.00 g .The mass of nitrous oxide that can be formed from 50.7 grams of nitrogen is approximately 39.00 grams .

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Answer:

I'm pretty sure it is the patriarch

Explanation

Patriarch means the head of a family or tribe.

Answer:

D

Explanation:

In terms of strength, NaOH (sodium hydroxide) is considered the strongest base.  So, the correct answer is Option A.

This is because it is a strong electrolyte and dissociates completely in water to produce hydroxide ions (OH-). This results in a high concentration of hydroxide ions and a high pH value, making it a strong alkaline substance.

Mg(OH)2 (magnesium hydroxide) is also considered a strong base, but not as strong as NaOH. It dissociates partially in water, producing hydroxide ions, but not as many as NaOH.

NH4OH (ammonium hydroxide) is a weak base, as it only partially dissociates in water, producing hydroxide ions. The concentration of hydroxide ions is not as high as NaOH, making it less alkaline and weaker in terms of strength.

So, the correct answer is Option A.

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The magnesium is the anode of a magnesium and zinc galvanic cell.

The magnesium is the anode means the site of oxidation, where magnesium ions flow into solution. Here the electrons leave the electrode and flow through the voltmeter as they move to the zinc cathode.

While on the other hand, zinc is the cathode i.e. the site of reduction, where zinc ions flow onto the electrode in order to pick up electrons so we can conclude that magnesium is the anode of a magnesium and zinc galvanic cell.

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Answer:ANSWER IS MG(s)

Explanation:

Answer:

but iron is 2 and 3 by its valance how could it be possible

Answer:

the science behind this is 45

Explanation:

you times it by 4N²

divide it by ⁶Mn

In the given bronze alloy, copper can be considered the solvent, and tin can be considered the solute.

In the bronze alloy mentioned, copper can be classified as the solvent, and tin as the solute. Solvents are the dominant components of the alloy and form the matrix or base, while solutes are the minor components that are dissolved within the solvent. In this particular bronze composition, copper accounts for 90.0% of the mass, making it the solvent, and tin makes up the remaining 10.0% as the solute. The presence of tin as a solute in the copper solvent enhances the strength and hardness of the alloy, resulting in the desirable properties exhibited by bronzes compared to pure copper or tin.

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Answer: 8 electrons

Explanation:

Answer: 8 valence electrons

Explanation: This is because the maximum electron an energy level can hold is 8 making it a stable atom

Answer:

Ya'll should really practice more because things like these are easy

Explanation:

You guys need to practice more since stuff like this are pretty simple.

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Answer:

why cant I see the picture on my screen

The pOH of the 0.188 M \(NH_3\) solution at 25°C is 3.81.

To determine the pOH of the given solution, we first need to calculate the concentration of hydroxide ions in the solution. We can do this by using the equation:

\($K_b = \frac{[OH^-][NH_3]}{[NH_4^+]}$\)

where Kb is the base dissociation constant for ammonia (\(NH_3\)), [\(NH_3\)] is the concentration of ammonia, [\($NH_4^+$\)] is the concentration of ammonium ions (\($NH_4^+$\)) (which is equal to [H+]), and [OH-] is the concentration of hydroxide ions.

We can rearrange the equation to solve for [OH-]:

\($[OH^-] = \frac{K_b[NH_4^+]}{[NH_3]}$\)

The concentration of \($NH_4^+$\) can be calculated from the concentration of \(NH_3\) using the equation for the ionization of ammonia in water:

\($NH_3 + H_2O \rightleftharpoons NH_4^+ + OH^-$\)

The equilibrium constant expression for this reaction is:

\($K_w/K_b = \frac{[NH_4^+][OH^-]}{[NH_3]}$\)

where Kw is the ion product constant for water \(1.0 \times 10^{-14}$ at 25°C\).

We can rearrange this equation to solve for [\($NH_4^+$\)]:

\($[NH_4^+] = \frac{K_w}{K_b[NH_3]/[OH^-]}$\)

Substituting this expression for [\($NH_4^+$\)] into the equation for [OH-], we get:

\($[OH^-] = \frac{K_bK_w}{[NH_3][OH^-]}$\)

Simplifying this expression, we get:

\($[OH^-]^2 = \frac{K_bK_w}{[NH_3]}$\)

Taking the square root of both sides, we get:

\($[OH^-] = \sqrt{\frac{K_bK_w}{[NH_3]}}$\)

Substituting the given values into this equation, we get:

\($[OH^-] = \sqrt{\frac{(1.76 \times 10^{-5})(1.0 \times 10^{-14})}{0.188}} = 1.54 \times 10^{-4} \text{ M}$\)

The pOH of the solution can be calculated using the equation:

\($pOH = -\log[OH^-]$\)

Substituting the value we calculated for [OH-], we get:

\($pOH = -\log(1.54 \times 10^{-4}) = 3.81$\)

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Answer:

A.) Polymers are substances that have relatively large molecules

Answer:

I hope this helps

Explanation:

V₂O₅ (s) + 2H₂ (g) → V₂O₃ (s) + 2H₂O(l) is the balanced chemical equation for the reaction of solid vanadium(V) oxide with hydrogen gas to form solid vanadium(III) oxide and liquid water.

The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.

The word based equation is

Vanadium(V) oxide + Hydrogen gas → Vanadium (III) oxide + Water

Now write the chemical equation

V₂O₅ (s) + 2H₂ (g) → V₂O₃ (s) + 2H₂O(l)

Reactant side                Product side

V = 2                                V = 2

O = 5                                O = 5

H = 4                                 H = 4

We can see that the number of atoms on reactant side is equal to the number of atoms on product side. So the given equation is balanced.

Thus from the above conclusion we can say that V₂O₅ (s) + 2H₂ (g) → V₂O₃ (s) + 2H₂O(l) is the balanced chemical equation for the reaction of solid vanadium(V) oxide with hydrogen gas to form solid vanadium(III) oxide and liquid water.

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The valence states provided are general representations and may vary depending on specific conditions and coordination environments.

a. Uvarovite: The mineral formula for uvarovite is Ca3Cr2(SiO4)3. In this formula, the valence state of calcium (Ca) is +2, the valence state of chromium (Cr) is +3, and the valence state of silicon (Si) is +4. Oxygen (O) is usually assigned a valence state of -2.

b. Azurite: The mineral formula for azurite is Cu3(CO3)2(OH)2. In this formula, the valence state of copper (Cu) is +2, carbonate (CO3) has a valence state of -2, and hydroxide (OH) has a valence state of -1.

c. Cuprite: The mineral formula for cuprite is Cu2O. In this formula, the valence state of copper (Cu) is +1, and oxygen (O) is usually assigned a valence state of -2.

d. Gypsum: The mineral formula for gypsum is CaSO4·2H2O. In this formula, the valence state of calcium (Ca) is +2, sulfur (S) has a valence state of +6, and oxygen (O) is usually assigned a valence state of -2. The water molecules (H2O) do not have a net charge.

e. Galena: The mineral formula for galena is PbS. In this formula, the valence state of lead (Pb) is +2, and sulfur (S) has a valence state of -2.

It's important to note that the valence states provided are general representations and may vary depending on specific conditions and coordination environments.

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Given data:

- mass % = 3.5%

- mass of solution = 50g

- mass of solute (sodium bicarbonate) = ?

In order to find the mass of solute we must use the next formula

Since we need the mass of solute, we must solve the equation for mas of solute

Now, we must replace the values in the equation

Finally, we must simplify

ANSWER:

The mass of the sodium bicarbonate is 1.75 g