To stop an object that is in motion on a frictionless surface, you stop applying a force.
True or false

Answer:the second largest one

Explanation:

both weels are pushing at it

d. water is a polar molecule that's why it can dissolve ionic compounds.

The polarity of water refers to its molecular structure, where the oxygen atom has a partial negative charge and the hydrogen atoms have partial positive charges. This makes water a polar molecule, meaning that it has a positive and negative end. Due to its polarity, water is able to dissolve ionic and polar substances, making it an excellent solvent. This property of water is important in many biological and chemical processes.

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Yes, a concrete beam can be compression controlled.

In a concrete beam, compression is the force that is pushing down on the top of the beam. When the compression force is greater than the tensile force, the beam is said to be compression controlled. This occurs when the concrete is subjected to a high level of compression, such as when a heavy load is placed on the beam. In this case, the concrete will experience a higher level of compression than tension, which can lead to the beam failing under the compressive forces.

Therefore, it is important to ensure that a concrete beam is designed to withstand the level of compression that it will be subjected to in order to prevent failure.

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The molecular formula of the unknown compound is C2H2O2.

To determine the molecular formula of the unknown compound, we need to calculate the empirical formula first and then find the multiple of its subscripts to obtain the molecular formula.

Given:

Percentage of carbon = 40.0%

Percentage of hydrogen = 6.7%

Percentage of oxygen = 53.3%

Molecular mass = 60.0 g/mol

Step 1: Convert the percentages to grams.

Assuming we have 100 grams of the compound:

Mass of carbon = 40.0 g

Mass of hydrogen = 6.7 g

Mass of oxygen = 53.3 g

Step 2: Convert the masses to moles using the molar masses of the elements.

Molar mass of carbon = 12.01 g/mol

Molar mass of hydrogen = 1.008 g/mol

Molar mass of oxygen = 16.00 g/mol

Number of moles of carbon = Mass of carbon / Molar mass of carbon

= 40.0 g / 12.01 g/mol

= 3.332 mol

Number of moles of hydrogen = Mass of hydrogen / Molar mass of hydrogen

= 6.7 g / 1.008 g/mol

= 6.648 mol

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

= 53.3 g / 16.00 g/mol

= 3.331 mol

Step 3: Determine the empirical formula by dividing the moles by the smallest value.

Dividing the moles of carbon, hydrogen, and oxygen by 3.331 gives approximately 1 for each element.

So, the empirical formula of the compound is CHO.

Step 4: Determine the multiple of the subscripts to obtain the molecular formula.

To find the multiple, we divide the molecular mass by the empirical formula mass.

Molecular mass = 60.0 g/mol

Empirical formula mass = (12.01 g/mol) + (1.008 g/mol) + (16.00 g/mol) = 29.018 g/mol

Multiple = Molecular mass / Empirical formula mass

= 60.0 g/mol / 29.018 g/mol

= 2.07

Rounding to the nearest whole number, we get 2.

Therefore, the molecular formula of the unknown compound is C2H2O2.

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Answer:

In a laboratory, a solution of sulfuric acid (H2SO4) was reacted with another of sodium hydroxide (NaOH), both aqueous. To form sodium sulfate (Na2SO4) and 2 molecules of liquid water (H2O). Complete in relation to the chemical equation that represents the reaction:

Explanation:

The balanced chemical equation of the reaction is:

\(H_2SO_4(aq)+2NaOH(aq)-> Na_2SO_4(aq)+2H_2O(l)\)

Thus, one mole of sulfuric acid reacts with two moles of sodium hydroxide.

Answer:

\(2.13\%\)

Explanation:

Quantity of copper measured by a student = 4.6 grams

Original quantity of copper = 4.7 grams

Error in measurement = Original quantity of copper - Quantity of copper measured by a student  \(=4.7-4.6=0.1\) grams

To find the percent error, apply the following formula:

Percent error = (Error in measurement / Original quantity of copper) × 100

\(=\frac{0.1}{4.7}(100)=2.13\%\)

The 3 mandatory statements that must be seen on label are the product identity , the weight and best before or use by date.

The label should contains the product identity that is the name of the food and the ingredients used. the whole description of the nutrition values of the product. The product identity also includes the company name, trade makers. the net weight of the product should be labeled. the net contents should be listed according to the consistency of the product.

The label should also includes the best before use or use by the date is the expiry date of the product.

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Based on the groups in the periodic table, the atom that could represent "x" in the stable molecule LiX, where Li is lithium, would be any atom from Group 17, also known as the halogens.

The halogens include elements such as fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).

Lithium, being in Group 1, has a single valence electron that it can donate to another atom to form a stable molecule. The halogens in Group 17 have a valence electron deficiency of one, making them suitable candidates to accept the electron from lithium and form a stable LiX molecule.

Therefore, elements like fluorine (F), chlorine (Cl), bromine (Br), iodine (I), or astatine (At) could represent the atom "x" in the LiX molecule.

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Answer: a. cause nuclear decay

Explanation:

The amount of heat absorbed to raise the temperature of 435 grams of water at 1 atm from 25°C to its boiling point, 100°C, is approximately 1.4 × 10^5 joules

What is specific heat?

Specific heat is the amount of heat energy required to raise the temperature of a substance by one unit of temperature per unit of mass. It is a physical property that helps to characterize a substance and is typically measured in units of joules per gram per degree Celsius (J/g°C) or calories per gram per degree Celsius (cal/g°C).

The amount of heat absorbed to raise the temperature of a substance can be calculated using the formula:

Q = mcΔT

where Q is the amount of heat absorbed (in joules), m is the mass of the substance (in kilograms), c is the specific heat capacity of the substance (in joules per kilogram per degree Celsius), and ΔT is the change in temperature (in degrees Celsius).

Substituting the given values, we get:

m = 435 grams = 0.435 kg

ΔT = 100°C - 25°C = 75°C

The specific heat capacity of water is 4.184 J/g°C. We can convert this to joules per kilogram per degree Celsius (J/kg°C) by dividing by 1000:

c = 4.184 J/g°C ÷ 1000 = 4.184 J/kg°C

Substituting these values, we get:

Q = (0.435 kg) × (4.184 J/kg°C) × (75°C)

Q = 140,089.2 J

Therefore, the amount of heat absorbed to raise the temperature of 435 grams of water at 1 atm from 25°C to its boiling point, 100°C, is approximately 1.4 × 10^5 joules. The answer closest to this value is option (B).

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Answer:

S HD ghv

Explanation:

This is the my account

Answer:

i think the answer is D)

but u should ask the another person too:)

Answer:

7.30g Potassium Chloride (KCl)

Explanation:

You are given 12.0 grams of KClO3, so start with that!

12g KClO3\(\frac{12g KClO3}{ } \frac{1 mol KClO3}{122.55g} \frac{2 mol KCl}{2 mol KClO3} \frac{74.55g KCl}{1 mol KCl} = 7.299877601\)≈7.30

Explanation

Kinetic energy is a modality of energy present in all moving bodies. According to the SI, its unit of measurement is the joule. Furthermore, this energy is a scalar quantity that has exclusively positive values.

Kinetic energy is proportional to the square of the body's velocity. Thus, if the speed of a body double, its kinetic energy will increase four times, if the speed of a body triple, then this increase will be nine times.

Answer

Kinect energy tells us how fast the reaction will proceed.

In order to reduce the risk of radiation exposure to individuals and environmental contamination, radioactive wastes are kept. The wastes' radioactivity decreases over time.

Large steel and concrete barrels that contain the garbage are typically properly sealed, although accidents and leaks can still happen. Cancerous growths can result from the severe negative impacts of nuclear waste on life.

Currently, dry casks are used to store all of the nuclear waste that a power plant produces over the course of its lifetime. Since 1987, Yucca Mountain in Nevada has been intended as a permanent disposal location for spent nuclear material.

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Answer:

Flowers play a crucial role in our lives; they have been used for generations to express the thoughts and feelings words cannot fully explain. Mother nature is the short term used to describe how nature gives life and nurture as a mother does for her children. As humans, we are part of mother nature's plan. We are also connected to plants and flowers, and some of the benefits have been passed to the next generation and will always be. We can control the air that we breathe, the aura around us, how we feel, and the things we attract in life. Other than only gifting your loved ones with flowers on special occasions, you can make the best and lasting impressions on your loved ones with a flower plant gift. This gesture shows that you understand how flowers are important in our life. To shed light on the importance of flowers in our life, here is a blog that will give five importance of flowers

The minerals that are usually malleable, good conductors of heat and electricity, and lustrous are called: metals.

Metals are the mineral that  are usually malleable, good conductors of heat and electricity, and lustrous . the following are the characteristics of metals are given as :

metals have tendency to donate electrons and form the cations. thus all the metals are called as electropositive elements in the periodic table.

Thus, The minerals that are usually malleable, good conductors of heat and electricity, and lustrous are called: metals.

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The microscopic interface asymmetry of grown semiconductor heterostructures.

The dispersion of restricted electrons. beginning from a multiband envelope formulation we practice matrix perturbation theory to derive specific expressions. Interface asymmetry, which in the conduction band Hamiltonian appear as a warping and a spin-splitting term. The warping term consequences in an inequivalence of the dispersion.

The microscopic interface asymmetry of grown semiconductor heterostructures that gives upward thrust to heavy-light hole coupling even at 0 in-plane wave vector, modifies also the dispersion of restricted electrons. beginning from a multiband envelope method we practice matrix perturbation principle to derive explicit expressions as a result of this interface asymmetry, which inside the conduction band.

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Answer: The chemical name of the covalent compound \(P_4O_9\)  is, tetraphosphorous nonaoxide.

Explanation:

A covalent compound is a compound where the sharing of electrons takes place between elements where both the elements are non-metals.

The naming of covalent compound is given by:

1. The less electronegative element is written first.

2. The more electronegative element is written second. Then a suffix is added with it. The suffix added is '-ide'.

3. If atoms of an element is greater than 1, then prefixes are added which are 'mono' for 1 atom, 'di' for 2 atoms, 'tri' for 3 atoms and so on.

Hence, the correct name for the compound \(P_4O_9\) which is a covalent compound is, tetraphosphorous nonaoxide.

To determine the mass of benzoic acid needed to produce a solution with a specific pH, we need to consider the acid dissociation reaction and the equilibrium constant expression:

C6H5COOH + H2O ⇌ C6H5COO- + H3O+

Ka = [C6H5COO-][H3O+] / [C6H5COOH]

Since we want to produce a solution with a specific pH, we can use the following equation that relates pH to the concentration of H3O+:

pH = -log[H3O+]

Taking the negative logarithm of both sides, we get:

[H3O+] = 10^(-pH)

Substituting this expression into the equilibrium constant expression and rearranging, we get:

[C6H5COOH] = Ka * [H3O+] / [C6H5COO-]

[C6H5COOH] = Ka * 10^(-pH) / [C6H5COO-]

We can then use this equation to calculate the mass of benzoic acid needed to produce a solution with a specific pH:

Calculate the concentration of benzoate ions ([C6H5COO-]) needed to produce the desired pH:

[H3O+] = 10^(-pH) = 10^(-7) = 1.0 x 10^(-7) M

Ka for benzoic acid is 6.3 x 10^(-5)

[C6H5COO-] = Ka * [H3O+] / [C6H5COOH] = (6.3 x 10^(-5)) * (1.0 x 10^(-7)) / (1 - 1.0 x 10^(-7)) = 6.25 x 10^(-11) M

Calculate the amount (in moles) of benzoic acid needed to produce 350.0 mL of solution with the desired concentration of benzoate ions:

moles of C6H5COOH = [C6H5COOH] * volume = (6.25 x 10^(-11) mol/L) * (0.350 L) = 2.19 x 10^(-11) mol

Convert the moles of benzoic acid to mass (in grams):

mass of C6H5COOH = moles * molar mass = (2.19 x 10^(-11) mol) * (122.12 g/mol) = 2.68 x 10^(-9) g

Therefore, to produce a solution with a pH of 7.00, we need to dissolve 2.68 x 10^(-9) g of benzoic acid in 350.0 mL of water.

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The rate constant of the reaction is approximately 0.208 M\(^(-1)\) s\(^(-1)\), with units of M\(^(-1)\) s\(^(-1)\).

To determine the rate constant of the reaction, we can use the rate equation:

rate = k\([A]^m[B]^n\)

From the given data, we can observe that in the first and second trials, the concentrations of reactant A ([A]) remain constant while the concentration of reactant B ([B]) doubles. This indicates that the reaction is first-order with respect to reactant B.

In the first and third trials, the concentration of reactant B remains constant while the concentration of reactant A doubles. This implies that the reaction is also first-order with respect to reactant A.

Since the rate remains the same for both trials (0.0171 M/s), the rate constant (k) must be the same for both trials. Therefore, we can use either trial to calculate the rate constant.

Using the first trial:

0.0171 M/s = k * (0.330 M)¹ * (0.260 M)¹

Simplifying the equation:

k = 0.0171 M/s / (0.330 M * 0.260 M)

k ≈ 0.208 M\(^(-1)\) s\(^(-1)\),

Therefore, the rate constant of the reaction is approximately 0.208 M\(^(-1)\) s\(^(-1)\), with units of M\(^(-1)\) s\(^(-1)\).

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Answer:

acid jsh just want me there for me too I love her soooooo you know I have no money to go back home from school tomorrow morning at like midnight to go out to my in the to the population and you have to get to know what to tell u what are u

Using the given partial derivatives at (2,1), the estimated temperature at (2.03, 0.96) is approximately 139.5°C based on first-order approximation.

To estimate the temperature at the point (2.03, 0.96), we can use a first-order approximation based on the given information. The first step is to use the partial derivatives of temperature, T_x and T_y, at the point (2,1). These derivatives provide the rate of change of temperature with respect to the x and y coordinates.

Given T_x(2,1) = 16 and T_y(2,1) = -15, we can use these values to estimate the change in temperature for small changes in x and y around the point (2,1). Since we want to estimate the temperature at (2.03, 0.96), which is a small change from (2,1), we can approximate the change in temperature as follows:

ΔT = T_x(2,1) * Δx + T_y(2,1) * Δy

Here, Δx = 2.03 - 2 = 0.03 and Δy = 0.96 - 1 = -0.04 (as we are subtracting the coordinates of (2,1) from (2.03, 0.96)).

Substituting the values, we have:

ΔT = 16 * 0.03 + (-15) * (-0.04)

   = 0.48 + 0.6

   = 1.08

Since T(2,1) = 140, we can estimate T(2.03, 0.96) by adding the change in temperature to the initial temperature:

T(2.03, 0.96) ≈ 140 + 1.08

                   = 141.08

Rounding this to the nearest tenth, the estimated temperature at (2.03, 0.96) is approximately 139.5°C.

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Answer:The units of molarity are M or mol/L. A 1 M solution is said to be “one molar.”

Explanation:

Answer:

mol/L

Explanation:

Answer:

atomic number =15

Explanation:

If an atom of an element has a mass number of 31 And 16 neutrons in its nucleus, what is the atomic number of the element?

mass number = protons +neutrons =31

protons = 31 -16=15

atomic number IS the number of protons

so atomic number =15

Answer:

21st century

Explanation: