What is the kinetic energy of a 5kg ball falling at a velocity of 10 m/sec?
Write out your steps and Answer.

Answer:

H O

Explanation:

Here we are given that the percentage of ,

And we need to find out the Empirical formula of the compound .

Let's make a table ,

\(\boxed{\begin{array}{c|c|c|c|c} \underline{\bf Element} & \underline{\bf Percentage} & \underline{\bf Atomic \ Weight } &\underline{\bf No. \ of \ atoms_{relative} } &\underline{\bf Ratio } \\\\ \sf O & \sf 94.10 &\sf 16 &\sf \dfrac{94.10}{16}=5.88 &\sf \dfrac{5.88}{5.88}=1 \\\\\sf H &\sf 5.90 &\sf 1 &\sf \dfrac{5.90}{1}=5.90&\sf \dfrac{5.90}{5.88}\approx 1 \end{array}}\)

Hence from this table we see that the ratio of oxygen and hydrogen is 1:1 . Therefore the Empirical formula of the compóund will be ,

\(\longrightarrow\underline{\boxed{\bf Empirical \ formula = H_1 O_1 = H \ O }}\)

The empirical formula for the compound is OH

Divide by their molar mass

O = 94.1 / 16 = 5.88

H = 5.90 / 1 = 5.9

Divide by the smallest

O = 5.88 / 5.88 = 1

H = 5.9 / 5.88 = 1

Thus, the empirical formula for the compound is OH

Learn more about empirical formula:

https://brainly.com/question/24297883

Litmus paper is used in step four of experiment 26a to determine the acidity or alkalinity of the substance being tested.

The primary purpose of using litmus paper is to provide a quick and straightforward method for identifying the pH level of a solution. This is essential because the pH value of a solution can greatly influence the outcome of an experiment, as well as provide vital information about the properties of the substance being tested. In this particular experiment, litmus paper serves as a useful tool for determining whether the solution is acidic or basic without the need for more complex or time-consuming techniques. By simply dipping a strip of litmus paper into the solution, the paper will change color based on the pH of the substance. Red litmus paper turns blue in the presence of a basic solution, while blue litmus paper turns red in the presence of an acidic solution.

This color change is due to the presence of organic dyes in the litmus paper, which react differently to acidic and basic conditions. These dyes are extracted from lichens, specifically the Roccella tinctoria species. Using litmus paper in this experiment allows for the efficient and accurate measurement of the pH value, ensuring that the results are reliable and consistent across multiple tests. In summary, litmus paper is used in step four of experiment 26a to determine the acidity or alkalinity of the substance being tested.

Learn more about acidity at :

https://brainly.com/question/13584094

#SPJ11

Answer:

The correct option is B

Explanation:

just did it edg 2020.

Answer:

the answer is c

Explanation:

Answer:

K-sylvite

Na-rock salt

Explanation:

Sylvite is a colourless or white mineral consisting of potassium chloride, occurring typically as cubic crystals(Oxford dictionary). It is the primary ore of potassium metal. It appears colorless, sometimes with a shade of red.

Rock salt is a primary ore of sodium. It is found in rocks, seas etc. Rock salt is sometimes commonly called halite. It usually appears white in colour and is rich in sodium.

Answer:

190

Explanation:

Gold has atomic number of 79, which is the number of protons.

Mass number = #protons + #neutrons = 79 + 111 = 190

The satellite that is closer to the planet will experience a larger gravitational force than the satellite that is twice as far away, even if they have the same mass.

This is because the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

In this case, the two satellites have the same mass, but the closer satellite is only one-fourth the distance away from the planet as the farther satellite. Therefore, the closer satellite experiences four times the gravitational force as the farther satellite.

To know more about gravitational force here

https://brainly.com/question/24783651

#SPJ4

Minerals are distributed unevenly across Earth's surface.

The distribution of minerals on Earth's surface is influenced by a variety of factors, including geological processes, the history of the Earth's formation, and the movement of tectonic plates. As a result, minerals are not distributed evenly across the planet.

Certain regions of the Earth, such as areas with active volcanoes or those that have experienced geological events like mountain-building, may have higher concentrations of certain minerals than other regions. In addition, some minerals may be more abundant in certain types of rocks or geological formations.

Moreover, the accessibility and availability of minerals can also vary widely depending on factors like economic and political conditions, as well as environmental regulations. These factors can impact the profitability and viability of mining operations in different regions of the world.

To know more about the Minerals, here

https://brainly.com/question/8009338

#SPJ4

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

Answer: I believe it would be B. Genus

Explanation:

I looked up the definitions for you and genus is defined as the group above species. Picture of definition attached.

To determine how much of the solution the nurse should use, we need more information. Specifically, we need to know the volume of the saline solution that the nurse wants to produce. Once we have that information, we can calculate the amount of the solution to be used.

The amount of solution the nurse should use depends on the desired volume of the saline solution.
1. Determine the desired volume of the saline solution. Let's call it V (in cc).
2. Calculate the amount of the solution to be used using the following formula:
Amount of solution = V - cc
In order to produce a saline solution, the nurse needs to mix a certain amount of cc of a saline solution with another saline solution.

The exact amount of solution to be used depends on the desired volume of the saline solution.  This gives us the formula: Amount of solution = V - cc. By plugging in the desired volume, we can determine how much of the solution the nurse should use. Remember to always double-check the calculations and ensure the measurements are accurate to achieve the desired concentration of the saline solution.

To know more about solution visit:

https://brainly.com/question/15757469

#SPJ11

\(\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}\)

Actually Welcome to the Concept of the Magnetism.

Since any magnetic object like true magnets, permanent magnets and solenoids always have a magnetic field lines around them that , originate from North Pole and Drive to South Pole, hence,

The most intensive and strong magnetic field are close to the poles.

A. is the correct answer.

===> A. The magnitude is greatest close to the poles.

If the centers of two objects are close to each other then greater will be the magnitude of the force of gravity. Hence the gravitational force will be greater in poles than the equator. The correct option is A.

The gravitational force is regarded as the universal force which attracts all the physical forms of the earth having mass. It is considered as an attractive force exerted on all objects.

The expression for gravitational force is:

F = G m₁m₂ / r²

The gravitational force is directly proportional to the masses of the objects and inversely proportional to the distance between them.

The gravitational force is maximum at poles than the equator. It is because the poles are found to be closer to the earth than the equator due to the oblateness of earth.

The distance of the equator from the center of the earth is found to be greater than that of the poles. Hence the maximum force is at poles.

Thus the correct option is A.

To know more about force, visit;

https://brainly.com/question/13014979

#SPJ6

Answer:

Metoprolol tartrate is the immediate-release version of metoprolol while metoprolol succinate is the extended-release version

Explanation:

This means that metoprolol succinate is released over time in the body leading to longer-acting effects. Metoprolol tartrate may need to be taken multiple times per day.

Explanation:

Wyzant

CHEMISTRY

Zoey C. asked • 06/05/19

Calcium hydroxide reacts with sodium phosphate to produce calcium phosphate and sodium hydroxide. If 100 grams of calcium hydroxide reacts with 100 grams of sodium phosphate,

determine the amount of each chemical present when the reaction is complete

Grams calcium hydroxide =?

Grams of sodium phosphate=?

Grams of calcium phosphate=?

Grams of sodium hydroxide?

Mass reactants=?

Mass after reaction?

Follow1

Add comment

More

1 Expert Answer

By:

Best

J.R. S. answered • 06/06/19

TUTOR 5.0 (133)

Ph.D. University Professor with 10+ years Tutoring Experience

ABOUT THIS TUTOR ›

3Ca(OH)2 + 2Na3PO4 ==> Ca3(PO4)2 + 6NaOH ... balanced equation

First, find the limiting reactant:

moles Ca(OH)2 present = 100 g x 1 mole/74.09 g = 1.35 moles (divided by 3-->0.45)

moles Na3PO4 present = 100 g x 1 mole/163.9 g = 0.610 moles (divided by 2-->0.31)

LIMITING reactant is Na3PO4

There will be zero grams Na3PO4 left after the reaction

For grams Ca(OH)2 left: 0.610 mol NaP x 3 mol Ca(OH)2/2 mol NaP = 0.915 mol Ca(OH)3 used up

Grams left over: 1.35 mol - 0.915 mol = 0.435 mol x 74.09 g/mol = 32 g left over (30 g if use 1 sig. fig.)

For grams of calcium phosphate left: 0.610 mol NaP x 1 mol CaP/2 mol NaP = 0.305 mol CaP formed

Grams at end of rx: 0.305 moles CaP x 310 g/mol = 94 g (90 g if use 1 sig. fig.)

For grams NaOH left: 0.610 mol NaP x 6 mol NaOH/2 mol NaP = 1.83 moles NaOH formed

Grams at end of rx: 1.83 moles NaOH x 40 g/mol = 73 g (70 g if use 1 sig. fig.)

Upvote0

According to stoichiomtry, 19.99 grams of calcium hydroxide will be needed to completely react with 29.5 grams of sodium phosphate.

Stoichiometry is a process of the determination of proportions of elements or compounds that are present in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is often  used in quantitative analysis for measuring concentrations of substances which are  present in the sample.

As per the stoichiometry of the the given balanced chemical equation,\(222.27\ g\) calcium hydroxide gives \(327.88 \ g\) sodium phosphate, thus,\(29.5 \ g\) sodium phosphate requires,

\(\dfrac{29.5}{327.88}\times{222.27}\\=19.99 \ g\)

Thus, 19.99 grams of calcium hydroxide will be needed to completely react with 29.5 grams of sodium phosphate.

Learn more about stoichiometry,here:

https://brainly.com/question/28780091

#SPJ4

Answer:

they lose kenetic energy

Explanation:

A P E X    CONFIRMED

Hope i helped!! It brought my grade up!

Answer:

B and C

Explanation:

is it multiple choice question??

Van der Waals forces are the interaction between the molecules and the atoms. It increases with an increase in the molecular size and the number of electrons. Thus, options B and C are correct.

Van der Waals forces are the weak forces of attraction and repulsion present between the atoms and the molecules of the compounds. They are also called London Dispersion Forces and dipole-dipole forces.

An increase in the number of electrons and size of the molecule increases the surface area and the electron cloud which in turn, increases the Van der Waals force.

The intermolecular force increases as in large atoms or molecules the valence are held loosely as they are far from the nucleus or the center of the atom.

Therefore, the size and the electron increase the Van der Waals force.

Learn more about Van der Waals force here:

https://brainly.com/question/11457190

#SPJ5

Answer:

second one... maybe

hope it helps :-)

Type of sentence is this: The conference's keynote speaker, who researches dialects of American English, was having audio problems, so he imitated all the accents in his presentation. is compound complex.

Sentence refers, to the group of words containing subject , verb etc. A compound complex is a type of sentence that is comprised of one or more dependent clauses and at least two independent clauses. The sentence given is the compound - complex sentence.

Thus, Type of sentence is this: The conference's keynote speaker, who researches dialects of American English, was having audio problems, so he imitated all the accents in his presentation. is compound complex.

To learn more about sentence herehttps://brainly.com/question/22665393

#SPJ1

Answer:

Grams of chlorine gas to moles

The SI base unit for amount of substance is the mole. 1 grams Chlorine is equal to 0.028206357713029 mole.

Explanation:

Answer:

Air pollution

Explanation:

Carbon(IV)oxide is sometimes harmful to man but good for plant in other to manufacture their food

The gas would need to be cooled to -47 degrees Celsius (-52 degrees Fahrenheit) to reduce the pressure of gas to 850 torr while keeping the volume and amount of gas constant.

Temperature (initial) = 55 degrees Celsius = 328 K
Pressure (initial) = 965 torr
Volume = 15.0 L
Pressure (final) = 850 torr
Amount of gas = constant

The problem involves the ideal gas law, which is given by:

PV = nRT

where P is the pressure, V is the volume, n is the amount of gas, R is the gas constant, and T is the temperature.

To solve for the final temperature, we need to use the combined gas law, which relates the initial and final conditions:

(P₁V₁)/T₁ = (P₂V₂)/T₂

where subscripts 1 and 2 represent the initial and final conditions, respectively.

We can rearrange the equation to solve for the final temperature:

T₂ = (P₂V₂*T₁)/(P₁V₁)

Plugging in the given values:

T₂ = (850 torr * 15.0 L * 328 K)/(965 torr * 1 L)

T₂ = 226 K

Therefore, the gas would need to be cooled to -47 degrees Celsius (-52 degrees Fahrenheit) to reduce the pressure to 850 torr while keeping the volume and amount of gas constant.

To know more about pressure of gas, refer

https://brainly.com/question/24719118

#SPJ11

Answer:

Molecules that contain only carbon and hydrogen are Hydrocarbons.

Pertanyaan ini tidak ditulis dengan benar.

Pertanyaan Lengkap:

Duah buah gaya masing masing F1=10N dan F2=5N bekerja pada sebuah benda yang terletak pada suatu permukaan lantai. Jika benda berpindah ke kanan sejauh 5 meter,usaha yang dilakukan pada benda oleh kedua gaya tersebut adalah

Answer:

75 Nm or 75 Joules

Explanation:

Dari pertanyaan tersebut, kami telah diberikan parameter berikut:

F1 = 10N

F2 = 5N

D = 5 Meter.

Kita diminta untuk mencari atau menghitung usaha yang dilakukan pada benda oleh dua gaya.

Rumus kerja yang dilakukan pada suatu benda dengan dua gaya =

W = (F1 + F2) × D

Dimana D = Perpindahan benda

W = (10N + 5N) × 5m

W = 15N × 5m

W = 75Nm atau 75Joules

Oleh karena itu, usaha yang dilakukan pada benda tersebut dengan dua gaya = 75Nm atau 75 Joules

Approximately 169 ml of solution must be added to make the concentration percentage 83%.

This is about the concentration of solutions. The concentration of a solution can be determined by volume of acid/total volume.

Here we are given,

Volume of acid = 125 ml

Current concentration Percentage = 60% acid solution

Concentration to be obtained = 83%

Let us suppose, to make the concentration level up to 83%, the amount of pure acid to be added be 'x'

We want to find x such that C(x) = 83% or 0.83

Thus, \(\frac{x + 0.6(125)}{x + 125}\) = 0.83

Since, the x can not be zero, so it must be a positive number. So, to find this, we multiply (x + 125) on both sides or even by cross-multiplication,

We get,

x + 0.6(125) = 0.83 (x + 125)

x + 75 = 0.83x + 103.75

0.17x - 28.75 = 0

0.17x = 28.75

x = 169.11

Hence, approximately 169 ml of pure acid must be added to obtain a concentration solution of 83% acid.

To know more about concentration, refer: https://brainly.com/question/17190754

#SPJ4

Answer:

The mass is also half of the mass of the original piece

Explanation:

Recall that the volume of a substance is defined as mass/volume. The density of substances is a constant. Hence, if a break off a piece of cement or bread such that what remains is only half the volume of the original piece, the mass of the new piece must also reduce to half of the mass of the original piece so that the volume of the material will remain constant.

Hence the answer above.

Which solution is the least concentrated?

O 2 moles of solute dissolved in 4 liters of solution

Answer:

F = 16.29 N

Explanation:

Given data:

Mass of cycle = 9.1 Kg

Acceleration = 1.79 m/s²

Force of bicycle = ?

Solution:

According to the Newton's second Law,

F = ma

F = force

m = mass

a = acceleration

by putting values,

F = 9.1 Kg × 1.79 m/s²

F = 16.29 N  ( N = Kgm/s²)

Answer:

During a change in state, the motion of the particles changes. ... Particles in a liquid can side past each other, but particles in a solid can only move enough to vibrate. Removing energy from a liquid can cause it to change to a solid. Adding energy to a solid can cause it to change to a liquid.

Hope this helps! please give me brainliest!

God bless:)

Change of state is caused by supply of heat to a substance causing its molecules to move faster.

There are three states of matter, these are;

It is possible for a substance to be transformed from one state of matter to the other when heat energy is supplied to the substance.

This heat energy causes the kinetic energy of the molecules of the substance to increase hence they vibrate faster and change from one physical state to another.

Learn more: https://brainly.com/question/9402776