Plz help me!!!!plzzz!

Answer:

Explanation:

From the given information:

The percentage wieght of mixture \(x_w\) = 0.4

The distillate = 70

From equilibrium data in Exercise 7.33

The Feed W = 100

The Liquid residue F = Feed(W) - Distillate (D)

= 100 - 70 = 30

By applying rayleigh equation;

\(In \bigg (\dfrac{F}{W}\bigg)= \int^{xF}_{x_w}\dfrac{1}{y-x} \ dx\)

From the plot of the graph of \(\dfrac{1}{y-x} \ vs \ x\); the area under the curve is being calculated between the point {\(x_1 = 0.4 \ and \ x_2\) }.

Such that; the area \(= In \bigg( \dfrac{100}{30}\bigg)\) = 1.209

Similarly, the value of xF = 0.067

∴

\(y_D = \dfrac{F_{xF} - W_{xW}}{D}\)

\(y_D = \dfrac{30(0.067)-100(0.4)}{70}\)

\(y_D = 0.543\)

Aluminum Can and Copper sheeting are flexible objects.

Flexibility is the softness which differs from rigid materials in the macroscopic world. Flexibility is the ability to bend easily or without breaking. When the applied stress is removed, the material retain its original shape in the flexible objects.

The material used for flexible objects characterizes the elastic limit which  is the yield strength or the maximum stress that a material can withstand before it breaks or deforms permanently.

Flexibility is important because it enables parts or tools to retains its original shape when force is applied or when something is bump into them. Molecules present between these objects have covalent bond.

There are two types of flexibility. They are:

1.  Elasticity

2. Plasticity

Thus, Aluminum Can and Copper sheeting are flexible objects.

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The net ionic equation for the reaction between aqueous (NH₄)₃PO₄ and aqueous  Zn(NO₃)₂ to form solid Zn₃(PO₄)₂ and aqueous NH₄NO₃ is:

Net ionic equations are equations that show only the reactant ions that are involved in the formation of a non-ionic product.

In a net ionic equation, the spectator ions or the ions which appear on both sides of the reaction are eliminated.

Considering the given reaction between aqueous (NH₄)₃PO₄ and aqueous  Zn(NO₃)₂ to form solid Zn₃(PO₄)₂ and aqueous NH₄NO₃:

The molecular equation is given below:

(NH₄)₃PO₄ (aq)  + Zn(NO₃)₂ (aq) ----> Zn₃(PO₄)₂ (s)  + NH₄NO₃ (aq)

The net ionic equation is:

PO₄³⁻ (aq)  + Zn²⁺ (aq) ----> Zn₃(PO₄)₂ (s)

The product  Zn₃(PO₄)₂ is insoluble and is obtained as a precipitate.

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A proton is a positively charged particle that has a mass of approximately 1 atomic mass unit (amu). A neutron is a particle with no charge and a negligible mass of approximately 1 amu.

An electron is a negatively charged particle that has a mass of approximately 1/1836 amu. A proton and a neutron have approximately the same mass because both particles have a mass of approximately 1 amu. A proton and an electron have approximately the same mass because the mass of the electron is much smaller than the mass of the proton. The mass of the proton is approximately 1836 times larger than the mass of the electron.

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Answer:

c or d

Explanation:

i tried a and it was wrong. its not B. and i cant see the rest. its the one that looks like a catipillar tho

Answer:

Its not A or B

Explanation:

Answer:

\(m_{AgNO_3}=577.6mg\)

Explanation:

Hello there!

In this case, according to the given chemical reaction, it is first necessary to compute the moles of reacting LiOH given its molar mass:

\(n_{LiOH}=81.5mg*\frac{1g}{1000mg}*\frac{1mol}{23.95g} =0.0034molLiOH\)

Thus, since there is a 1:1 mole ratio between lithium hydroxide and silver nitrate (169.87 g/mol) the resulting milligrams turn out to be:

\(m_{ AgNO_3}=0.0034molLiOH*\frac{1molAgNO_3}{1molLiOH} *\frac{169.87gAgNO_3}{1molAgNO_3} *\frac{1000gAgNO_3}{1gAgNO_3} \\\\m_{AgNO_3}=577.6mg\)

Best regards!

Answer:

AgNO3+Li-->LiNO3+Ag

It is already balanced.

And turns out to be M AgNO3=577.6mg

Hope this helps!

Answer:K2X

Explanation: Valency can be defined as the combining power of an element. It is the valency that dictates the value an element will have when writing a chemical formula for its compound.

MgX is a compound of magnesium and an element X. The valency of magnesium in most of its compound is +2. Now for the 2 to have been absent in the chemical formula, this shows that the element X itself have a valency if -2 for the valencies of both to have canceled out.

Now considering the element potassium, it is an alkaline metal belonging to group 1 of the periodic table. Hence, it is expected that it has a valency of +1

Forming a compound with element X means there would be an exchange of valencies between the two. We have established that x has a valency of -2. The formula of the compound thus formed by exchanging the valencies of both element would be K2X

The chemical formula for the compound formed between Lithium and element X is Li₂X.

Valency can be described as the combining power of a chemical element. It is the valency that describes the value an element will have in the chemical formula for that compound.

MgX compound is a compound of magnesium and an element X. The valency of magnesium is +2.  The chemical formula shows that the element X itself has a valency of -2 which gave a neutral compound.

Now given element is Lithium, it is an alkali metal of group 1 of the periodic table. It has a valency of +1 as it has one electron in its valence shell.

Forming a compound with element X, there will be an exchange of valencies between the two. As element X has a valency of -2. The formula of the formed compound by exchanging the valencies of Lithium and element X would be Li₂X

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pH is defined as the negative logarithm (base 10) of the hydrogen ion concentration ([H+]) in a solution. Therefore, option (C) is correct.

In other words, the pH scale measures the acidity or basicity of a solution. The lower the pH value, the more acidic the solution is, and the higher the pH value, the more basic or alkaline the solution is.

For example, pure water has a pH of 7, which is considered neutral, meaning it is neither acidic nor basic. Acids have pH values lower than 7, while bases have pH values greater than 7. The pH scale is important in many areas of chemistry, including biochemistry, environmental science, and medicine.

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Answer:

Two molecules of hydrogen combine with two molecules of oxygen to form hydrogen peroxide. Hence, its chemical formula is H2O2. It is the simplest peroxide (since it is a compound with an oxygen-oxygen single bond). Hydrogen peroxide has basic uses as an oxidizer, bleaching agent and antiseptic

All the element have their own unique color because the every element have their own set of energy levels.

According to the bohr model of atoms : electrons exist at certain energy levels. when we give heat to electron , it gets excited and moves from lower energy level to higher energy level. the electron is less stable in higher energy level. when an electron returns from higher energy level to lower energy level it emits some energy in form of radiation. The wavelength of light depends upon energy level . and every elements have their own unique energy levels.  The color for different element is different.

Thus, All the element have their own unique color because the every element have their own set of energy levels.

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Answer:

c

Explanation:

Answer:

Location b is experiencing summer

In the Northern Hemisphere, Summer season is represented here location B.

Answer:

A) 14,500 kPa

B)  6 atm

C)  23.443 atm

D)  898.6  mmHg

Explanation:

Two types of data that can be obtained from descriptive statistics include frequency distribution and variability in the data set. These data are calculated as the mean of standard deviation in the case of variation.

The relative importance of the science field of descriptive statistics is based on the obtention of statistically significant measurements in order to validate a hypothesis.

Therefore, with this data, we can see that the relative importance of the science field of descriptive statistics is based on testing working hypotheses.

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Not enough information man

The balloon will be filled by a gas, and as the gas is not escaping we can assume that it is at a constant pressure.

The KMT (Kinetic Molecular Theory) explains the macroscopic properties of gases. This theory states that gases are formed by particles in constant motion, and that their kinetic energy is directly proportional to the temperature of the gas.

If we leave the balloon filled with gas in the sun we assume that the temperature of the gas inside will start to rise. When the temperature starst to rise, and the pressure is constant, particles will gain kinetic energy. This will result in particles moving faster and coliding with each other and with the balloon's walls more often. As a consecuence the particles will tend to stay farther from one another and the volume of the balloon will increase.

This is an example of Charles's Law that states that at constant pressure the volume of a gas is directly proportional to its temperature. In other words, when the temperature of the gas increases the volume increases as well.

To summarize, if we fill a balloon and we leave it in the sun its volume will increase.

Answer:

\(V_2=52.2L\)

Explanation:

Hello there!

In this case, by bearing to to mind the given conditions, it is firstly possible to determine the initial volume of the closed system via the ideal gas equation:

\(PV=nRT\\\\V=\frac{2.00mol*0.08206\frac{atm*L}{mol*K}*298.15K}{1.00 atm} \\\\V=48.9L\)

Which is V1 in the Charles' law:

\(\frac{T_2}{V_2} =\frac{T_1}{V_1}\)

And of course, T1 is 298.15 (25+273.15). Therefore, by solving for V2 as the final volume, we obtain:

\(V_2=\frac{V_1T_2}{T_1}\\\\V_2=\frac{48.9L*(45+273.15)K}{(25+273.15)K} \\\\V_2=52.2L\)

Best regards!

Explanation:

When a chlorine atom forms an ion, it gains electrons, making it negative.  A neutral chlorine will become a chlorine with a -1 charge.  When it gains an electron, the radius increases.

When a sodium atom forms an ion, it loses electrons, making it positive.  A neutral sodium will become a sodium with a +1 charge.  When it loses an electron, the radius decreases.

Answer:

Based on the current state of technology and the environmental concerns, the United States should be heavily investing in solar and wind energy sources to create energy. Solar and wind power are renewable and environmentally friendly sources of energy that can provide a sustainable solution to the energy crisis. Unlike fossil fuels, solar and wind energy do not produce harmful greenhouse gases or contribute to climate change. They also have a lower risk of environmental disasters than nuclear power or oil spills from offshore drilling. Solar and wind power are also becoming increasingly cost-effective, and their prices are continuously dropping, making them more accessible and affordable to consumers. Investing in solar and wind energy can lead to job creation, energy independence, and a more sustainable future for the United States. Therefore, the United States should prioritize the adoption of solar and wind energy to meet the increasing demand for energy while mitigating the negative impacts of traditional energy sources.

Answer:

1.00 M

Explanation:

Sn^2+ reacts with KMNO4 as follows;

5Sn^2+(aq) + 2MnO4^-(aq) + 16H^+(aq) ----> 5Sn^4+(aq) + 2Mn^+(aq) + 8H2O(l)

The number of moles of MnO4^- reacted = 42.1/1000 L × 0.145 mol/L

= 0.0061 moles

If 5 moles of Sn^2+ reacts with 2 moles of MnO4^-

x moles of Sn^2+ reacts with 0.0061 moles of MnO4^-

x= 5 × 0.0061/2

x= 0.015 moles

Since the volume of the Sn^2+ solution is 15.00mL or 0.015 L

number of moles = concentration × volume

Concentration = number of moles/volume

Concentration= 0.015 moles/0.015 L

Concentration = 1 M

The word "symptom" refers to a specific manifestation or indication of a condition, disease, or disorder that is experienced or observed by an individual.

Symptoms are subjective or objective changes in the body's normal functioning that may be recognized as abnormal, uncomfortable, or problematic. Symptoms can manifest in various ways depending on the nature of the underlying condition. They can be physical, such as pain, rash, cough, fever, or fatigue, indicating an illness or injury affecting the body. Symptoms can also be psychological, such as anxiety, depression, or confusion, reflecting disturbances in mental health.

Symptoms serve as important clues for medical professionals to identify and diagnose diseases or disorders. They provide valuable information about the nature, severity, and progression of an illness, helping healthcare providers formulate appropriate treatment plans. Additionally, symptoms may also be important for individuals to self-assess their own health status and seek appropriate medical attention.

It is essential to note that symptoms alone may not provide a definitive diagnosis, as they can overlap across different conditions. Further evaluation, including medical tests and examinations, is often necessary to confirm a diagnosis and determine the appropriate course of action.

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Answer:10.71 g

Explanation:

Answer:

the answer is C (dobereiner)

Explanation:

I'm sure

Answer:

Okyu

Explanation:

Mass of Zn = 65

(NO3)2 = 124

\(65 + (14 + 16 \times 2) \times 2 \\ 65 + 124 \\ = 184g mol\)

Explanation:

Mass of Zn = 65

(NO3)2 = 124

\begin{gathered}65 + (14 + 16 \times 2) \times 2 \\ 65 + 124 \\ = 184g mol\end{gathered}

65+(14+16×2)×2

65+124

=184gmol

In the given equation 5.96 L of O2 will be produced.

What is chemical equation?

A chemical equation is a symbolic representation of a chemical reaction that shows the reactants on the left side and the products on the right side, with the coefficients indicating the relative amounts of each substance involved. It follows the law of conservation of mass, which states that mass cannot be created or destroyed in a chemical reaction.

The balanced equation for the reaction is:

2Li₂O(s) → O₂(g) + 4Li(s)

From the equation, we can see that 2 moles of Li₂O produces 1 mole of O₂. We can use this ratio to convert the mass of Li₂O to moles of O₂

First, we need to calculate the number of moles of Li₂O:

n(Li₂O) = m/M

where m is the mass of Li₂O and M is the molar mass of Li₂O. The molar mass of Li₂O is:

M(Li₂O) = 2(M(Li) + M(O)) = 2(6.941 g/mol + 15.999 g/mol) = 45.88 g/mol

Plugging in the values, we get:

n(Li₂O) = 25 g / 45.88 g/mol = 0.544 mol

According to the balanced equation, 2 moles of Li₂O produce 1 mole of O2. So, the number of moles of O2 produced is:

n(O2) = 0.544 mol / 2 = 0.272 mol

Finally, we can convert the number of moles of O2 to liters using the ideal gas law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature. Assuming the reaction occurs at standard temperature and pressure (STP), which is 0°C (273.15 K) and 1 atm, we can simplify the equation to:

V = nRT/P

Plugging in the values, we get:

V = (0.272 mol) (0.08206 L·atm/mol·K) (273.15 K) / 1 atm = 5.96 L

Therefore, we can expect 5.96 L of O2 to be produced.

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The molarity of a solution is an important method to determine the concentration of a solution. The molar mass of the acid is 180 g / mol.

The molarity of a solution is defined as the number of moles of the solute present per litre of the solution. The equation used to calculate the molarity is:

Molarity = Number of moles / Volume in Litres

0.08843 L × 0.102 mol / 1L = 0.00902 mol base

1 mol base = 1 mol acid

1.625 g / 0.00902 mol = 180 g/mol

Thus the molar mass of the acid is 180 g/mol.

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Answer:

See explanation

Explanation:

The mechanism involves SN1 nucleophilic substitution reaction. The -OH group of the alcohol is first protonated. Since water is a good leaving group, -OH2 leaves the substrate creating a primary carbo cation.

A 1,2 methyl shift now occurs to create a tertiary carbo cation which is more stable leading to the major product shown in the image attached to this answer.

Answer:

212° F

Explanation: