If 0. 36 g of nacl is dissolved in water and the resulting solution weighs 12. 80 g, what is the mass % of nacl in the solution? make certain your answer has the correct number of significant figures.

The amount of excess acetic anhydride is:Amount of excess acetic anhydride = initial amount - amount used = 0.0196 mol - 0.0145 mol = 0.0051 molTherefore, 0.0051 mol of acetic anhydride is used in the reaction.

The balanced chemical equation for the reaction of salicylic acid with acetic anhydride is given as follows: 2C7H6O3 + C4H6O3 ⟶ 2C9H8O4 + H2OIn this equation, salicylic acid (C7H6O3) is the limiting reagent and acetic anhydride (C4H6O3) is the excess reagent. The stoichiometric ratio between salicylic acid and acetic anhydride is 2:1. This means that for every two moles of salicylic acid, one mole of acetic anhydride is required. To find out how much of the excess reactant is used when the reaction is complete, we need to determine the limiting reagent and the excess reagent. We can do this by calculating the amount of product that each reactant can produce and comparing the values.Let's first calculate the number of moles of each reactant:No. of moles of salicylic acid = mass/molar mass = 2/138 = 0.0145 molNo. of moles of acetic anhydride = mass/molar mass = 2/102 = 0.0196 molTo determine the limiting reagent, we need to calculate the amount of product that each reactant can produce.

According to the balanced equation, 2 moles of salicylic acid produces 2 moles of aspirin, while 1 mole of acetic anhydride produces 2 moles of aspirin. Therefore, the amount of aspirin that can be produced from each reactant is as follows : Amount of aspirin produced from salicylic acid = 2 x 0.0145 mol = 0.0290 molAmount of aspirin produced from acetic anhydride = 2 x 0.0196 mol = 0.0392 molSince salicylic acid can produce only 0.0290 mol of aspirin, it is the limiting reagent. This means that acetic anhydride is in excess. To determine how much of the excess reactant is used, we need to subtract the amount of acetic anhydride used from the amount that was initially present. The amount of acetic anhydride used is equal to the amount of salicylic acid used, which is 0.0145 mol.

for such more questions on reaction

https://brainly.com/question/11231920

#SPJ8

Option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.

The long-run equilibrium condition for perfect competition is that price (P) is equal to average total cost (ATC), which is also equal to marginal cost (MC), and marginal revenue (MR).

Option (d), P=ATC=MR=MC, best represents the long-run equilibrium condition for perfect competition. In perfect competition, firms operate at the minimum point of their average total cost curve, where price equals both average total cost and marginal cost. This condition ensures that firms are earning zero economic profit and are producing at an efficient level.

In the long run, if firms are earning economic profit, new firms will enter the market, increasing competition and driving prices down. Conversely, if firms are experiencing losses, some firms may exit the market, reducing competition and causing prices to rise. This process continues until firms reach a state where price equals average total cost, marginal cost, and marginal revenue, ensuring a long-run equilibrium.

Therefore, option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.

Know more about Equilibrium here:

https://brainly.com/question/30694482

#SPJ11

Answer:

cation are positive charged valances so the answers include B) Al³+ (aluminium) and D) Mg²+ (magnesium)

Answer:

cation are positive charged valances so the answers include B) Al³+ (aluminium) and D) Mg²+ (magnesium)

Explanation:

The mass of Zirconium metal from the mass spectrum is 90.5.

A mass spectrum is a representation that shows the relative abundance of each isotope of an element. We must recall that isotopes of elements are atoms of the element that differ only in their masses.

From the mass spectrum shown in the question, the isotope that is most abundant is the isotope Zr-90. The least abundant isotope is Zr- 96. We now have to calculate the mass of Zr as follows;

(90 × 0.514) + (91 × 0.112) + (92 × 0.171) + (94 × 0.173) + (96 × 0.027)

=  46.26 + 10.192 + 15.732 + 16.262 + 2.592

=  90.5

Learn more about isotopes: https://brainly.com/question/13214440

Answer:

The answers to your questions are given below

Explanation:

1. KClO3 => Potassium trioxochlorate (V)

Thermal decomposition of KClO3.

When we heat potassium trioxochlorate (V), KClO3, it will slip into two producing potassium chloride, KCl and oxygen gas, O2 as shown below:

2KClO3(s) —> 2KCl(s) + 3O2(g)

Note: the above reaction will occur faster and at a lower temperature in the presence of manganese (iv) oxide as catalyst.

2a. Determination of the number protons and neutrons in Nitrogen–14.

Nitrogen–14 has the following:

Mass number = 14

Atomic number = 7

Proton =?

Neutron =?

Atomic number of an atom is simply the proton number. Therefore,

Proton = Atomic number

Atomic number = 7

Proton = Atomic number = 7

Proton = 7

Mass number = Proton + Neutron

Mass number = 14

Proton = 7

Neutron =?

14 = 7 + Neutron

Collect like terms

Neutron = 14 – 7

Neutron = 7

Therefore, Nitrogen–14 has 7 protons and 7 neutrons.

2b. Determination of the number protons and neutrons in Nitrogen–15.

Nitrogen–15 has the following:

Mass number = 15

Atomic number = 7

Proton =?

Neutron =?

Atomic number of an atom is simply the proton number. Therefore,

Proton = Atomic number

Atomic number = 7

Proton = Atomic number = 7

Proton = 7

Mass number = Proton + Neutron

Mass number = 15

Proton = 7

Neutron =?

15 = 7 + Neutron

Collect like terms

Neutron = 15 – 7

Neutron = 8

Therefore, Nitrogen–15 has 7 protons and 8 neutrons.

Answer: Different parts of the sun rotate at different rates.

Explanation:

The statement that best describes the motion of the sun is that different parts of the sun rotate at different rates.

First and foremost, we should note that the rotation of the sun is on its axis and also the sun isn't a solid. Due to this, its motion will be that there'll be rotation of different part of it at different rates. Assuming the sun was solid, then all of its parts will move together.

Answer:

Different parts of the sun rotate at different rates.

Explanation: pic proof

The effects of long-term exposure to mustard gas causes mortality and chronic respiratory disease.

Exposure to mustard gas in the long term can result in mortality from influenza, pneumonia as well as chronic breathing disease. Exposure for long term leads to respiratory complications and septic shock. Extensive breathing in the environment of mustard gas can cause chronic respiratory disease, respiratory infections or death.

Extensive eye exposure to this gas can cause permanent blindness. Exposure to mustard gas may also increase the chances of lung and respiratory cancer so we can conclude that mustard gas is lethal and can cause a number of diseases in a person who is exposed to it.

Learn more: https://brainly.com/question/25686553

Answer:

protons

Explanation:

btw you protons and electrons are always the same

prcAnswer:

e c. proton

Explanation:

i pueslist

Answer:

A. Their numbers of atoms

Explanation:

Answer:

Venus

Explanation:

From the sun outwards is   Mercury   Venus  Earth  and then Mars

In the Ostwald process, 4 molecules of ammonia and 5 molecules of oxygen react to produce 4 molecules of nitric oxide and 6 molecules of water.

The platinum-rhodium gauze catalyst is used in the first step of the Ostwald process to catalyze the oxidation of ammonia with oxygen to produce nitric oxide and water. The catalyst helps to lower the activation energy of the reaction and increase the rate of reaction.

The Ostwald process is a chemical process used to produce nitric acid (HNO3) from ammonia (NH3) and oxygen (O2). The process involves two main steps. In the first step, ammonia is oxidized with oxygen to produce nitric oxide (NO) and water (H2O) according to the following reaction:

4NH3 + 5O2 → 4NO + 6H2O

This reaction is exothermic and is typically carried out in a catalytic reactor at temperatures between 800°C and 900°C using a platinum-rhodium gauze catalyst.

In the second step, the nitric oxide is further oxidized with air to produce nitrogen dioxide (NO2) which is then absorbed in water to produce nitric acid:

2NO + O2 → 2NO2

3NO2 + H2O → 2HNO3 + NO

The nitrogen dioxide (NO2) is typically produced by passing the nitric oxide (NO) through a bed of vanadium oxide catalysts and then mixing it with air.

The Ostwald process is an important industrial process for the production of nitric acid, which is used in the production of fertilizers, dyes, and other chemicals.

Learn more about Ostwald process here:

https://brainly.com/question/28295415

#SPJ1

Answer:

Electronegativity

Explanation:

Answer:

Electronegativity

Explanation:

Edge 2021

The chemical formula for strontium phosphide is Sr3P2.

Strontium phosphide is a binary ionic compound formed between strontium (Sr) and phosphorus (P) ions. In this compound, two phosphorus atoms combine with three strontium atoms to form the ionic compound Sr3P2. It is a solid, greyish-white powder that is soluble in water.

An ionic compound is a compound formed by the combination of ions that have opposite charges. An ionic compound is usually made up of a metal and a non-metal. The metal atom in an ionic compound loses one or more electrons to become a positively charged ion.

The non-metal atom gains one or more electrons to become a negatively charged ion. The resulting positive and negative ions are held together by strong electrostatic forces to form an ionic compound.

You can learn more about Strontium phosphide at: brainly.com/question/18828978

#SPJ11

Answer:

53.9%

Explanation:

The equation of the reaction is;

C4H6O3+C7H6O3→C9H8O4+C2H4O2

Number of moles of salicyclic acid reacted = 88.3 g/138.121 g/mol = 0.639 moles

1 mole of salicyclic acid yields 1 mole of aspirin

0.639 moles of salicyclic acid also yields 0.639 moles of asprin

Theoretical yield of asprin = 0.639 moles * 180.158 g/mol

Theoretical yield of asprin = 115.12 g

Percent yield = Actual yield/Theoretical yield * 100/1

Percent yield = 62.0 g/115.12 g * 100

Percent yield = 53.9%

Answer:

It can’t displace any more than its volume, assuming there is no external force pushing downwards.

Answer:

177.3kg C₂₁H₄₄

Explanation:

Based on the chemical reaction:

C₂₁H₄₄ → 3C₂H₄ + C₁₅H₃₂

Where 1 mole of C₂₁H₄₄ produce 3 moles of ethene, C₂H₄.

To solve this question we need to determine the moles of ethene in 50.4kg. 1/3 these moles are the moles of C₂₁H₄₄ that must be added:

Moles Ethene -Molar mass: 28.05g/mol-

50.4kg = 50400g * (1mol / 28.05g) = 1796.8 moles of ethene

Moles C₂₁H₄₄:

1796.8 moles of ethene * (1 mol C₂₁H₄₄ / 3 mol C₂H₄) = 589.93 moles C₂₁H₄₄

Mass C₂₁H₄₄:

589.93 moles C₂₁H₄₄ * (296g / mol) = 177283g =

After completing the task experiment, the velocity of the cart does not change is referred to as a true statement.

This is referred to as the rate of change of the object's position with respect to a frame of reference and time.

Since we were told that the experiment had been completed , then we can assume that the cart is at a state of rest which therefore means that there will be no change in its velocity and is therefore the reason why true was chosen as the correct choice.

Read more about Velocity here https://brainly.com/question/6504879

#SPJ1

Answer27.9 gFeS

Explanation:

Note: This is for 16.0 Grams of Sulfer

a) The balanced equation for the reaction of Al2O3 with heat to produce Al and O2 is:

2Al2O3(s) → 4Al(s) + 3O2(g)

From the equation, we can see that 2 moles of Al2O3 produces 4 moles of Al. Therefore, the number of moles of Al produced from 4.20 x 10^3 kg of Al2O3 can be calculated as:

moles of Al2O3 = mass of Al2O3 / molar mass of Al2O3

moles of Al = 2 × moles of Al2O3

molar mass of Al2O3 = 2 × atomic mass of Al + 3 × atomic mass of O

molar mass of Al2O3 = 2 × 26.98 g/mol + 3 × 16.00 g/mol = 101.96 g/mol

moles of Al2O3 = 4.20 × 10^3 kg / 101.96 g/mol = 41.18 mol

moles of Al = 2 × 41.18 mol = 82.36 mol

The mass of Al produced can be calculated as:

mass of Al = moles of Al × molar mass of Al

mass of Al = 82.36 mol × 26.98 g/mol = 2.22 × 10^3 kg

Therefore, 2.22 x 10^3 kg of aluminum will be produced from 4.20 x 10^3 kg of Al2O3.

b) The balanced equation for the reaction of O2 with carbon to produce CO is:

C(s) + O2(g) → CO(g)

From the previous calculation, we know that 3 moles of O2 are produced for every 4 moles of Al2O3. Therefore, the number of moles of O2 produced from 4.20 x 10^3 kg of Al2O3 can be calculated as:

moles of O2 = (3/4) × moles of Al2O3

moles of O2 = (3/4) × 41.18 mol = 30.89 mol

The amount of CO produced can be calculated using the stoichiometry of the balanced equation:

moles of CO = moles of O2

moles of CO = 30.89 mol

The mass of CO produced can be calculated as:

mass of CO = moles of CO × molar mass of CO

molar mass of CO = atomic mass of C + atomic mass of O

molar mass of CO = 12.01 g/mol + 16.00 g/mol = 28.01 g/mol

mass of CO = 30.89 mol × 28.01 g/mol = 865 g

Therefore, 865 g of CO will be produced from the oxygen generated by the reaction of 4.20 x 10^3 kg of Al2O3.

To know more about moles refer here

brainly.com/question/30885025#

#SPJ11

If 2.35 grams of magnesium oxide are formed, 1.42 grams of Mg reacted in the reaction.

Magnesium oxide is a chemical compound composed of magnesium and oxygen, with the chemical formula MgO.

2 Mg(s) + O₂(g) -> 2 MgO(s)

From the equation, we can see that 2 moles of magnesium react with 1 mole of oxygen to produce 2 moles of magnesium oxide. This means that the mole ratio of magnesium to magnesium oxide is 2:2, or simply 1:1.

2.35 g MgO x (1 mol MgO/40.31 g MgO) = 0.0583 mol MgO

Since the mole ratio of Mg to MgO is 1:1, we know that 0.0583 moles of Mg also reacted. Now we can use the molar mass of Mg to calculate the mass of Mg that reacted:

0.0583 mol Mg x 24.31 g/mol = 1.42 g Mg

Therefore, 1.42 grams of Mg reacted in the reaction.

To know more about magnesium oxide, refer

https://brainly.com/question/24605172

#SPJ1

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

Learn more about mixture at: https://brainly.com/question/12160179

#SPJ1

The mesosphere temperature ranges throughout. With a gain in altitude within the mesosphere, the temperature decreases because of a reduction in the absorption of penetrating solar radiation.

The temperature in the mesosphere varies from -2.5 degrees Celsius to -90 degrees Celsius. Nevertheless, the mesopause can achieve temperatures below -143 degrees Celsius. Normally, the atmosphere gets cooler with an upsurge in altitude because of an increase in the stretch from the Earth's surface, which is a source of thermal radiation that is being reemitted after the absorption of solar radiation. The mesosphere is found instantly above the stratosphere and directly below the thermosphere.

To learn more about the mesosphere visit here:

https://brainly.com/question/14739123

#SPJ4

The cultures of prehistoric humans are primarily known through the excavation of stone tools and other durable artifacts, such as the Oldowan and Acheulian tool traditions.

Stone tools and imperishable artifacts serve as key archaeological evidence for understanding prehistoric cultures. Through meticulous excavation and analysis, archaeologists have been able to piece together the lifestyles, technological advancements, and social behaviors of early human societies. The term "paleolithic" refers to the Old Stone Age, a time when humans relied on stone tools as their primary implements.

The Oldowan tool tradition is considered the earliest stone tool industry, dating back around 2.6 million years ago. It is characterized by simple tools, such as choppers and scrapers, which were crafted by flaking off pieces from larger stones. These tools were primarily used for basic activities like butchering and processing animal carcasses.

Later, the Acheulian tool tradition emerged around 1.76 million years ago, representing an advancement in stone tool technology. Acheulian tools, such as handaxes and cleavers, were more refined and standardized, showcasing an increased level of sophistication in tool-making techniques. These tools served a wide range of purposes, including hunting, woodworking, and shaping raw materials.

By studying the Oldowan and Acheulian tool traditions, researchers gain valuable insights into the cognitive abilities, cultural development, and technological progress of early humans. The examination of these artifacts provides evidence of their adaptability, problem-solving skills, and the gradual refinement of their tool-making techniques over time.

Learn more about prehistoric humans

brainly.com/question/28301954

#SPJ11

Metallic elements exist in a solid-state and they are opaque, have a shiny surface, good conductors of electricity and heat, malleable and ductile, and are dense. The structure of metals is formed by atoms that are held together by metallic bonds. These atoms have loosely bound valence electrons that can be shared between the neighboring atoms.

For such more question on valence electrons

https://brainly.com/question/371590

#SPJ8

Answer:

Explanation:

Here, we want to check if the equation of the reaction is balanced or not

Now, for a balanced equation of reaction, the number of atoms of the individual elements on both sides of the equation is equal

Now, let us check the atoms:

We have 1 Sr on both sides

We have 1 SO4 on both sides

We have 1 Mg on both sides

We have 2 OH on both sides

From what we can see, the equation of the reaction is balanced

Thus, the correct answer choice is B

Answer:oml felt

Explanation:

I'm sorry tho

Answer:

800-273-8255

Explanation:

here is the sui cide hotline number

The volume of the gas when the container is cooled from a temperature of 300 K to 200 K is 0.83 L

Charles' law states as follow:

V₁ / T₁ = V₂ / T₂

Where

From the question given above, the following data were obtained

V₁ / T₁ = V₂ / T₂

1.25 / 300 = V₂ / 200

Cross multiply

300 × V₂ = 1.25 × 200

Divide both side by 300

V₂ = (1.25 × 200) / 300

V₂ = 0.83 L

Learn more about gas laws:

https://brainly.com/question/6844441