If a transverse cut occurs, what two sections will the body divide into?

Answer:

If the TLC plate runs samples which are too concentrated, the spots will be streaked and/or run together. If this happens, you will have to start over with a more dilute sample to spot and run on a TLC plate.

Explanation:

Answer:

b

Explanation:

Answer: The vapor pressure of pure water at 100°C is 760mm of Hg.

Explanation: We know tat 100 degree Celsius the water will convert into gas phase.  At boiling point the vapor pressure of any liquid is 1 atmosphere and if we boil the water at 100° Celsius  it means 1 atmosphere . So, 1 atmosphere = 760mm of Hg.

Answer:

It's a double displacement reaction.

Answer:

To answer your question one must look at Pascal's relationship between force, area, and Pressure.

Explanation:

\(P=\frac{F}A\)

So we take what I assume is area:

\(A= 5\text{m}^2\)

And I know is force:

\(F=200\text{N}\)

So simply divide them:

\(P=\frac{200\text{N}}{5\text{m}^2}\)

Giving you:

\(P = 40 \text{pascal}\)

So the right answer is 40 Pascal.

look at the attached picture

Hope it will help you

Good luck on your assignment

Answer

Colonizing Mars will be beneficial as it will provide numerous economic, technological, and societal benefits. For example, colonizing Mars could be a step towards fixing the inevitable overpopulation problem.

Explanation:

Answer:

(A) chlorine is an oxidizing agent in this reaction so it oxidize iodine and it itself is reduced

Explanation:

Cl2 oxi no. = 0 became Cl- oxi no. = -1

so it is reduced

I- oxi no. = -1 became I2 oxi no. = 0

so it oxidized

Answer:

Explanation:

To find the mass given the force and acceleration we use the formula

\(mass = \frac{force}{acceleration} \\ \)

From the question

force = 20 N

acceleration = 4 m/s²

We have

\(mass = \frac{20}{4} \\ \)

We have the final answer as

Hope this helps you

Answer:

The atomic number would be 12.

Explanation:

A neutral atom of Carbon-12 contains six protons, six neutrons, and six electrons.

Answer:

8.90

Explanation:

Density = mass ÷ volume

D = 222.50 g ÷ 25.00

= 8.9

The density of the unknown metal is 8.90.

Hope that helps.

Answer:

C: 8.90

Explanation:

Answer:

Explanation:

D = mass/volume.

for the units, I'll take it in g/L but I don't know which units you want.

4.44*10^5 mg =  0.444 grams.

0.444/7 = 0.0634 g/L

Answer:

17

Explanation:

Mass number = # of protons + # of neutrons

Mass number is calculated using ONLY protons and neutrons. Electrons are not in the count.

Thus, we simply add them together: 8 + 9 = 17

This element is Oxygen - 17.

Answer:

B. HCl, C. H2SO4, F. HNO3

Explanation:

Acids have hydrogen (H) at the beginning

bases have OH at the end

HCl, H₂SO₄,HNO₃ are the chemical formulas which represent acids.

Acids are defined as substances which on dissociation yield H+ ions , and these substances are sour in taste. Out of the following , given sets of compounds HCl, H₂SO₄ and HNO₃ are acids as they yield H+ ions on dissociation.

According to the number of H+ ions which are generated on dissociation acids are classified as mono-protic , di-protic ,tri-protic and polyprotic  acids  depending on the number of protons which are liberated on dissociation.

Acids are widely used in industries  for  production of fertilizers, detergents  batteries and dyes.They are used in chemical industries for production of chemical compounds like salts which are produced by neutralization reactions.

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Answer:

The wooden spoon.

Explanation:

The wooden spoon won't be as hot as a metal spoon its logic and a correct answer.

Answer:

D. People continue to selectively breed plants and animals to produce predictable results.

Explanation:

Gregor Mendel's work with pea plants affect human life today as a result of his ability to produce different results and genetic composition of pea plants through his crossing methods.

This laid the foundation for people today to continue to selectively breed plants and animals to produce predictable results which has lots of advantages associated with it.

Answer:

Explanation:

It is volume-volume problems that does not require the use of molar mass.

Answer:

Mass will be equal to 874.56 gram

Explanation:

Molar mass of sulfur = 32 u

Molar mass of Florine = 19 u

Therefore molar mass of \(SF_2\) \(=32+2\times 19=70u\)

So mass of \(6.023\times 10^{23}\) particle is 70 gram

Therefore mass of 1 particle

\(=\frac{70}{6.023\times 10^{23}}=11.62\times 10^{-23}g\)

Therefore mass of \(7.525\times 10^{24}\) particle is

\(7.525\times 10^{24}\times 11.62\times 10^{-23}=874.56gram\)

When a small stream of cold water is run over the bottom of a Florence flask, the temperature of the flask decreases. As a result, the water vapor inside the flask condenses, turning from gas to liquid phase. This is observed as droplets forming on the inner surface of the flask.

Using the phase diagram of water, this phenomenon can be explained as follows:

1. Initially, the water vapor inside the flask is in the gaseous phase, as it's at a higher temperature and pressure compared to the cold water outside.
2. When the cold water stream contacts the flask, it causes the temperature of the flask's surface to decrease, which in turn lowers the temperature of the water vapor inside.
3. As the temperature of the vapor drops, it reaches the liquid-vapor equilibrium line on the phase diagram. This is the point where the vapor and liquid phases coexist at a specific temperature and pressure.
4. The water vapor then condenses into liquid droplets as it crosses the liquid-vapor equilibrium line, moving from the gaseous phase region to the liquid phase region on the phase diagram.

In summary, running a stream of cold water over the bottom of a Florence flask causes the water vapor inside to condense into liquid droplets, as explained by the phase diagram of water.

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An electron domain consists of ; All of the above options  i.e.  a ) nonbonding pair of electrons   b) a single bond     c) a multiple bond.

An Electron domain is the number of bonded locations ( lone pair or bonded ) found around an atom. and the bond location is independent of the type of bonding existing between atoms in a molecule.

Electron domain are also known as electron groups. the types of electron domain are ; nonbonding pair of electrons and bonded atom.

Hence we can conclude that An electron domain consists of ; nonbonding pair of electrons,  a single bond and  a multiple bond.

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I chose baking soda (sodium bicarbonate) and it has an ionic bond. The properties that helped me identify its bond type were its solubility in water, and its high melting and boiling points.

The properties that did not help me identify its bond type were its color, odor, and shape. I did predict the bond type correctly because the properties that I observed were consistent with the properties of ionic compounds.

From diagram 1 we can see that the different substances include Butter, Table Salt, Sugar, Baking Soda and Aluminum Foil.

The different properties of this substance are as follows:

a.) Butter: As we observe it is yellow and smooth, it is not soluble (NS), not compressible(NC), and is oily. This melts first among all others and contains covalent bond(C).

b.) Table Salt: This is white and grainy, also completely soluble (CS), it is brittle in nature (B), it is somewhat glassy(SG) and melts last in all. It contains Ionic Bond (I).

c.) Sugar: This is white and grainy, also completely soluble (CS), it is brittle in nature (B), it is somewhat glassy(SG) and melts third in all. It contains Covalent Bond (C).

d.) Baking soda: This is white and powdery, also partially soluble (PS), it is Not compressible(NC), it is earthy(E) and melts second in all. It contains Ionic Bond (I).

e.) Aluminum Foil: This is silver, smooth and thin, also not soluble (NS), it is Compressible in nature (C), it is shiny and reflective (S/R), and melts fourth in all. It contains Metallic Bond (M).

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Answer:

i would agree

Explanation:

Answer:

A. cycas

1. it is thick and scaly

2. it grow relatively slowly and have a large, terminal rosette of leaves.

B. bamboo

1. it is very durable

2. it is both flexible and elastic

C. lemna

1. it grows as simple free-floating thalli on or just beneath the water surface

2. it are small, not exceeding 5 mm in length

D. paddy

1. it is variety purity

2. it degree of purity

E. sugarcane

1. it is bear long sword-shaped leaves

2. it's stalks are composed of many segments, and in each joint there is a bud

Answer:

Nope.

Explanation:

No, I do not believe that NASA invented thunderstorms to cover up the sound of space battles. For example, Benjamin Franklin is noted to have experimented with lightning in the 1700s, well before NASA or NACA existed. Therefore, NASA did not invent the concept of thunderstorms.

if you expect the unexpected is it still unexpected??

Answer:

It is a method used to identify a suspect.

Explanation:

DNA fingerprinting is a method used to identify an individual from a sample of DNA by looking at unique patterns in their DNA.

The question is incomplete, the complete question is;

As Danny was pouring cereal for his breakfast, he noticed that the cereal box says that the cereal contains 5 milligrams of iron per serving. Danny decided to perform an experiment to test this claim. He found that the cereal contains 4.6 milligrams of iron per serving. Based on Danny's measurement, the value reported on the label is ( CORRECT OR INCCORECT) because A: (IT IS DIFFERENT FROM THE VALUE DANNY MEASURED) B: (IT IS REORTED TO THE NEAREST MILLIGRAM) C: (IT USES THE SAME UNITS THAT DANNY USED).

Answer:

CORRECT because IT IS REORTED TO THE NEAREST MILLIGRAM

Explanation:

In mathematics, values may be rounded up or down as required. In the case of this measurement of cereals by Danny, it is customary to measure the amount of iron per serving to the nearest milligram.

As such, even though Danny found out that the actual amount of iron per serving in the cereal is 4.6 milligrams, the value reported on the cereal box is still correct because it was reported to the nearest milligram hence the value had to be rounded up.

Answer:

The hydroxide [OH-] concentration of the solution is 1.26*10⁻⁵ M.

Explanation:

The pOH (or potential OH) is a measure of the basicity or alkalinity of a solution.

POH indicates the concentration of hydroxyl ions [OH-] present in a solution and is defined as the negative logarithm of the activity of hydroxide ions (that is, the concentration of OH- ions):

pOH= -log [OH-]

A solution has a pOH of 4.90. Replacing in the definition of pOH:

4.90= -log [OH-]

Solving:

-4.90= log [OH-]

1.26*10⁻⁵ M= [OH-]

The hydroxide [OH-] concentration of the solution is 1.26*10⁻⁵ M.

Al2 (SO4)3 + H2 + H2SOy 2 Al mass = 1.105 g,

2 Al molar mass = 26.98 g/mol,

and 2 Al moles = 1.105 / 26.98 = 0.041 moles.

KOH concentration is 1.4 M.

KOH's volume is 52.2 mL, or 0.0522 L, and its moles are 1.4 x 0.0522, or 0.07308 moles.

2Al + 2 KOH + 4 H2SO4 + 22H2O2KAI concentration of H2SO4 = 9.0 M volume of H2SOy = 21.8 ml = 0.0218 L moles of H2SO4 = 9.0 X 0.0218 = 0.1962 moles (SO4).

Aluminum contains the fewest number of moles, 12 H2O + 3 H2.

Reagent is constrained by aluminum.

A 2 mole Al creates a 3 mole H2 from the aforementioned reaction. In other words, 0.041 moles of Al generate 0.041 x 1.5 moles of H2, or 0.0615 moles of H2.

H2 quantity equals moles times molar mass.

= 0.0615 x 2g

Amount of H₂ produced = 0.123g

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Answer: Does adding salt to water make the water boil faster that if salt is not added?

Explanation:

The scientific question for the boiling water experiment could be: "What is the effect of increasing temperature on the boiling point of water?"

This question aims to investigate how temperature influences the boiling point of water. By conducting the experiment and analyzing the results, scientists can gain a better understanding of the relationship between temperature and the physical state change of water from liquid to vapor.

The question focuses on a specific variable (temperature) and its impact on the boiling process, allowing for a targeted investigation and potential insights into the behavior of water under different conditions.

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The difference in pressure is 8.98 %.

What is pressure ?

In the physical sciences, pressure is defined as the stress at a point within a confined fluid or the perpendicular force per unit area. A 42-pound box with a bottom area of 84 square inches will impose pressure on a surface equal to the force divided by the area it is applied to, or half a pound per square inch. Atmospheric pressure, which is roughly 15 pounds per square inch at sea level, is the weight of the atmosphere pressing down on each unit area of the Earth's surface. Pascals are used to express pressure in SI units; one pascal is equivalent to one newton per square meter. Almost 100,000 pascals of atmospheric pressure are present.

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When water boils, the bubbles are composed of water vapor or steam.

The bubbles form when the water is heated to its boiling point and the water molecules gain enough thermal energy to overcome the intermolecular forces holding them together in the liquid state.

As the water molecules escape into the gaseous state, they form bubbles that rise to the surface of the liquid and release the steam into the atmosphere.

The bubbles are filled with water vapor, which is less dense than liquid water and has a higher thermal energy due to the increased molecular motion in the gas phase. Once the bubbles reach the surface, they burst and release the steam into the air.

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