You kick your friend in the face with a force of 120 N. Your foot's mass was 4 kg.
How much was your foot accelerating at that time?|
I

Answer:

Explanation:

The reaction that is described goes as follows:

2AgCl + Mg(OH)2 ---> MgCl2 + 2AgOH

The precipitate here is the MgCl2 salt.

I hope it helped!

Answer:

3600J

Explanation:

Q = mc∆T

= 50 x 0.9 x (100 - 20)

= 3600J

Answer:

One Faraday is the charge of one mole of electrons, which is approximately 96,500 coulombs. To calculate the number of Faradays needed to reduce 127 grams of copper to the cuprous form in chlorine, we need to know the balanced chemical equation for the reaction and the equivalent weight of copper.

Explanation:

To know the molarity of carbonic acid when titrated with ammonium hydroxide. We use \(M_{1} V_{1} =M_{2} V_{2}\) formula and hence the molarity of carbonic acid is 0.063M.

Titration is an experimental technique in which the molarity of unknown solution is calculated using other solution whose molarity is known. To know the end point we use phenolphthalein as indicator.  

Mathematically,

\(M_{1} V_{1} =M_{2} V_{2}\)

where,

\(M_{1}\)=Molarity of carbonic acid

\(M_{2}\)=Molarity of  ammonium hydroxide

\(V_{1}\)=Volume of  carbonic acid

\(V_{2}\)=Volume of  ammonium hydroxide

Substituting all values

\(M_{1}\)=(0.125×23.8)÷47.00

\(M_{1}\)=0.063M

Thus the molarity of  carbonic acid is 0.063M

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29.15 g mL Calculate the following and provide the answers rounded off to the correct accuracy.

Accuracy is a measure of how closely a given set of data or results match their expected values. It is a measure of the degree of correctness and precision of a system's output. Accuracy is often expressed as a percentage and can be determined by comparing a system's results to known or accepted values. Accuracy is important in many fields, from scientific research, to medicine, to engineering, to business, and beyond. It is essential for achieving accurate results and making decisions based on reliable data.

The calculation for this problem is (8.12 - 0.9800) g × (3.4501 + 0.16) mL = (7.14 g) × (3.61 mL) = 25.8954 g mL. Rounded off to the correct accuracy, the answer is 29.15 g mL.

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2ZnS + 3O2 → 2ZnO + 2SO2

Find the limiting reagant :

n ZnS = m ZnS / Mr ZnS

n ZnS = 11.27 / 97

n ZnS = 0.116 mole

n O2 = m O2 / Mr O2

n O2 = 6.97 / 32

n O2 = 0.218 mole

n O2 / coef. O2 > n ZnS / coef. ZnS

So ZnS is the limiting reagant

Calculate the product :

n ZnO = (coef. ZnO / coef. ZnS) • n ZnS

n ZnO = 2/2 . 0.116

n ZnO = 0.116 mole

m ZnO = n ZnO • Mr ZnO

m ZnO = 0.116 • 81

m ZnO = 9.396 gr

Answer:

c

Explanation:

c your answer is C. THANKS FOR ME

Kinetic theory is a theory that explains the behavior of matter and its changes in state. This theory tells us or assumes the following:

The matter is composed of very small particles in continuous motion, between them there is empty space.

Molecules perform elastic collisions. In a collision, the kinetic energy of a particle is transferred to another particle without loss of global energy.

The kinetic energy of particles increases with increasing temperature, the kinetic energy is related to the velocity of the particles. And in the same way, if the temperature decreases, the kinetic energy will also decrease and the molecules will move slower.

So, the correct statement regarding the Kinetic Molecular Theory will be: As temperature decreases, this causes velocity to decrease

Answer:

The half-life varies depending on the isotope.

Half-lives range from fractions of a second to billions of years.

The half-life of a particular isotope is constant.

Explanation:

Make sure you add the options

100 dm3 of Kr is equal to 100,000,000 cm3 of Kr. Since 1 mole of any gas occupies 22.4dm3 at STP.

Kr is the chemical symbol for krypton, a noble gas element found on the periodic table. It has an atomic number of 36 and an atomic mass of 83.80. Krypton is a colorless, odorless, and tasteless gas that is found in trace amounts in the atmosphere. It is used in a variety of applications, including fluorescent lighting, medical imaging, and welding. Krypton is also used in space exploration, where its inert properties make it a useful gas for deep space probes.

then we can calculate the number of moles of Kr present in the given volume:

Number of moles of Kr = 100,000,000 cm3 / 22.4dm3/mol

= 4,467,849.13 moles of Kr

Since 1 mole of Kr contains 6.022 x 10^23 particles, the number of particles of Kr present in the given volume is:

Number of particles of Kr = 4,467,849.13 moles x 6.022 x 1023 particles/mol

= 2.67 x 1026 particles of Kr

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Answer:

\(E=2.06\times 10^{-19}\ J\)

Explanation:

Given that,

The wavelength of electromagnetic radiation is 963.5 nm.

We need to find the energy of a photon with this wavelength.

The formula used to find the energy of a photon is given by :

\(E=\dfrac{hc}{\lambda}\\\\E=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{963.5\times 10^{-9}}\\\\E=2.06\times 10^{-19}\ J\)

So, the energy of a photon is \(2.06\times 10^{-19}\ J\).

The number is converted to 60. 2 × 10²²

Index forms are simply described as mathematical forms that are used in the representation of numbers that are too small or too large in more convenient forms.

These index forms are also referred to as scientific notation or standard forms.

Some rules of index forms are;

From the information given, we have that;

0. 0602 × 10 ²⁵

Subtract three from the exponent value and move three spaces right, we have;

60. 2 × 10²⁵⁻³

60. 2 × 10²²

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Answer:

heat changes energy is by the sun

the sun gives off energy

The average reaction rate between 0 and 1500 s is -0.000105 M/s and  the average reaction rate between 500 and 1200 s is -0.0000571 M/s

Part A: To calculate the average reaction rate, we can use the formula:

Average rate = (change in concentration)/(change in time)

The change in concentration of A is [A]t - [A]0, and the change in time is t - 0. Using the given data, we get:

Average rate = ([A]1500 - [A]0)/(1500 - 0) = (0.016 - 0.184)/(1500) = -0.000105 M/s

Therefore, the average reaction rate between 0 and 1500 s is -0.000105 M/s.

Part B: Following the same formula as above, we can calculate the average rate between 500 and 1200 s using the given data:

Average rate = ([A]1200 - [A]500)/(1200 - 500) = (0.031 - 0.069)/(700) = -0.0000571 M/s

Therefore, the average reaction rate between 500 and 1200 s is -0.0000571 M/s.

Part C: The instantaneous rate at t=800 s can be determined by drawing a tangent to the concentration vs. time plot at that point and finding its slope.

From the given data, we can plot [A] vs. time and draw a tangent at t=800 s

The slope of this tangent gives us the instantaneous rate at that point. Using a straight edge or ruler, we can estimate the slope to be approximately -0.0000575 M/s.

Therefore, the instantaneous rate of the reaction at t=800 s is approximately -0.0000575 M/s.

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I can give you a general approach to budgeting based on the guidelines you provided.

First, let's assume that the gross annual salary of the MBA entrepreneur is $100,000.

Federal Tax:

19% of $100,000 = $19,000

Net Salary:

$100,000 - $19,000 = $81,000

State Tax:

Assuming the state tax rate is 11%:

11% of $81,000 = $8,910

Net Salary:

$81,000 - $8,910 = $72,090

FICA Tax:

Assuming the FICA tax rate is 8%:

8% of $81,000 = $6,480

Net Salary:

$81,000 - $6,480 = $74,520

Monthly Net Income:

$74,520 divided by 12 = $6,210

Monthly Expenses:

Assuming a debt of $1,000 per month (credit card/student loans/car payments),

Utilities: $150

Cable and Internet: $100

Cell Phone: $50

Car Payment: $400

Groceries: $400

Car Gasoline: $150

Health Insurance: $400

Auto Insurance: $150

Home Insurance: $100

Entertainment: $200

Haircuts/Nails/Beauty: $100

Gym Membership: $50

Clothes: $100

Gifts: $100

Vacation Fund: $200

Total Monthly Expenses:

$2,900

Projected Monthly Expense:

10% of $6,210 = $621

Note that this is just an example, and your budget may differ depending on your specific circumstances and location. It's essential to track your actual expenses carefully to make sure you're sticking to your budget and adjusting it as needed.

Answer:

I apologize if this is not what you wanted! If you want a different answer or would like me to change it please let me know :)

Explanation:

For housing, I should be spending no more than 30% of my monthly net income. This includes rent, mortgage payments, and utilities. For transportation, I should be spending no more than 15% of my monthly net income. This includes car payments, gas, and insurance. For food, I should be spending no more than 10% of my monthly net income. This includes groceries and eating out. For savings, I should be spending no more than 10% of my monthly net income. This includes retirement savings, emergency funds, and other investments. For debt payments, I should be spending no more than 10% of my monthly net income. This includes student loans, credit cards, and other debts. For entertainment, I should be spending no more than 5% of my monthly net income. This includes movies, concerts, and other leisure activities.

In addition to these categories, I may also need to budget for other expenses. This could include medical bills, clothing, and other miscellaneous expenses. It is important to remember that these percentages are just guidelines and may need to be adjusted depending on my individual situation.

Scenario : I would like to save for a new cell phone which variable expense can I cut back ? How much should I save for a month on the phone?

If I would like to save for a new cell phone, I can cut back on my variable expenses. I can reduce my spending on entertainment, clothing, and miscellaneous expenses. I should aim to save at least 5% of my net annual salary for a new cell phone. This would be approximately $1,000 per year, or $83.33 per month.

id k what to do for the other two, but i hope this helps you! :))))))

Answer: 1.72

Explanation:

The substance is ethylene glycol.

The term density is the ratio of mass to volume. We have two substances here which are ethanol and ethylene glycol. We have the mass of the solution as shown in the image in question 7 in the attachment to the question.

Mass of the solution = 381 - 250 = 131 g

Volume of the solution = 4 fl oz

1mL= 0.0338 fl

x = 4 fl oz

x =4 fl oz*  1mL/0.0338 fl oz

x = 118.34 mL

Density = mass/volume =  131 g/118.34 mL = 1.11 g/mL

The substance is ethylene glycol.

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Answer:

People get minerals out of the ground by digging it. They use machines to also help them dig faster.

Answer:

The primary method used to extract minerals from the ground are:

Underground mining, surface (open pit) mining. Placer mining...

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Answer:

bromine

Explanation:

Based on the given reactions, the compounds are as follows:

A: The specific product formed from the reaction between prop-1-yne and either 2HBr or H2O2.

B: The product formed when compound A reacts with 2H2O.

C: The product formed when compound B reacts with K2CO3(aq).

D: The product formed from the heat-induced reaction of compound C.

E: The product formed when compound D reacts with HBr.

Based on the given reactions, let's analyze the compounds involved:

Reaction 1: prop-1-yne + 2HBr/H2O2 = A

The reactant prop-1-yne reacts with either 2HBr or H2O2 to form compound A. The specific product formed will depend on the reaction conditions.

Reaction 2: A + 2H2O = B

Compound A reacts with 2H2O (water) to form compound B.

Reaction 3: B + K2CO3(aq) = C

Compound B reacts with K2CO3(aq) (potassium carbonate dissolved in water) to form compound C.

Reaction 4: C + heat = D

Compound C undergoes a heat-induced reaction to form compound D.

Reaction 5: D + HBr = E

Compound D reacts with HBr (hydrobromic acid) to form compound E.

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Answer:

Mass = 93.5 g

Explanation:

Given data:

Number of moles of NH₃ = 5.50 mol

Mass of NH₃ = ?

Solution:

Formula:

Mass = number of moles × molar mass

Molar mass of ammonia = 17 g/mol

By putting values,

Mass = 5.50 mol × 17 g/mol

Mass = 93.5 g

1.12 M is the dextrose solution's final concentration.

The following formula can be used to determine the concentration of the diluted dextrose solution:

C₁V₁ = C₂V₂

The starting concentration and volume are denoted by C1 and V1, while the final concentration and volume are denoted by C2 and V2.

Given: 2.0 M initial concentration (C1)

14 mL is the initial volume (V1).

25 mL is the final volume (V2).

When the values are substituted into the formula, we get:

C2 = (2.0 M) (14 mL) (25 mL)

To make the calculation easier:

28 = 25C₂

Calculating C2: C2 = 28 / 25 = 1.12 M

As a result, 1.12 M is the dextrose solution's final concentration.

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Answer:

Repetition happens when measurements are taken during the same experimental run , which means that the same person runs the experiment in multiple trials . on the other hand , replicayion occurs when an experiment is reproduced by different experimental run .

Answer:

Repetition refers to performing multiple trials throughout an experiment. Repetition reduces mistakes and increases one’s confidence in the results. Replication refers to the ability of a process to be repeated by another individual. When a scientist replicates the experiment of another, the experiment should produce the same results.

Explanation:

Periodic table is a tabular chart of the chemical elements according to their atomic numbers so that elements with similar properties are in the same group (column).

The periodic table consists of elements arranged in a vertical (groups) and horizontal (periods) manner.

However, elements on the same group are known to have the same chemical properties because they possess the same number of valence electrons, hence, react chemically similar.

These elements have the same chemical properties because they contain the same number of valence electrons.

Example of elements with those similarities are chlorine, fluorine, iodine etc.

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Taking into account the definition of dilution, 227.5 mL of the 0.20 M solution is needed to prepare 455 mL of the diluted NaOH.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

In this case, you know:

Replacing in the definition of dilution:

0.20 M× Vi= 0.10 M× 455 mL

Solving:

(0.10 M× 455 mL)÷ 0.20 M= Vi

227.5 mL= Vi

In summary, 227.5 mL of the 0.20 M solution is needed to prepare 455 mL of the diluted NaOH.

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Answer:

How many grams is in 10.00 moles of calcium (Ca)? The number of atoms can also be calculated using Avogadro's Constant (6.02214179×1023) / one mole of substance.

Explanation:

Hope this helps

Answer:

76.366

Explanation:

Knewton answer is 76.4

Answer:

76.4mL

Explanation:

First, calculate the final number of moles of carbon dioxide (n2) in the container.

n2 = n1+n added = 3.41×(10^-3) mol+8.41×(10^-4) mol = 4.25×(10^-3) mol

Rearrange Avogadro's law to solve for V1.

V1 =(V2×n1)/n2

Substitute in the known values for n1, V2, and n2.

V1 = (95.2mL×(3.41×10^-3 mol))/(4.25×(10^-3) mol)=76.4mL

So the initial volume is 76.4mL.

Oxidation in chemistry occurs when the atoms of an element lose electrons and the oxidation state of the element increases while reduction occurs when the atom of an element gains electrons and reduces the oxidation number.

The atom being reduced is the oxidizing agent while the atom being oxidized is the reducing agent.

Oxidation number is the hypothetical charge of an atom within a molecule. The oxidation number of an element can be calculated as follows;

2x - 2(5) = 0

2x - 10 = 0

2x = 10

x = 5

2x - 6 = 0

2x = 6

x = 3

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