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Answer:

12.5%.

Explanation:

The following data were obtained from the question:

Accepted value = 22.4 L

Experimental value = 19.6L

Percentage error =.?

Percentage error can be obtained by using the following formula:

Percentage error = |Experimental value – Actual value | / actual value × 100

Percentage error = |19.6 – 22.4|/22.4 × 100

Percentage error = 2.8 /22.4 × 100

Percentage error = 280/22.4

Percentage error = 12.5%

Therefore, the percentage error of Sarah is 12.5%

Explanation:

(15 × 10^2) =1500.

(5.2 ×10^5)=520000.

(1500)+(520000).

=518500 .

Answer:

[tex]M_{2}O[/tex]

Explanation:

Anything oxide is a compound with oxygen, and since oxygen is -2, it requires two of the metal's +1 to make it zero

In other words:

2(+1) + (-1) = 0

Answer:

A. It allows doctors to view internal body structures to help them diagnose illness.

Explanation:

The statement, that describes fiber-optic technology benefits the field of medicine is "it allows doctors to view internal body structures to help them diagnose illnesses."

Fiber optics is a technology that transmits information as light pulses across great distances using strands of glass or plastic fibre. Fiber-optic cables use light pulses that travel quickly to convey data.

Internal organs and tissue can be viewed through bodily orifices because to the flexible yet hard multi-fibers. Endoscopes are used by doctors to explore symptoms such as nausea and gastrointestinal pain, confirm diagnosis through biopsies, and provide medical therapy.

Medical fibre optics are an important medical technology that is employed in a variety of medical professions. They are chemically inert, sterile, malleable, and non-toxic to the human body. Fiber optic technology enables surgeons to repair organs, diagnose joint problems, and remove sick tissues, resulting in a faster recovery period for the patient than more intrusive surgical approaches.

Hence the correct answer is it allows doctors to view internal body structures to help them diagnose illnesses.

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Answer:

Sieving

Explanation:

Sieving is a mechanical separation technique which depends on the relative sizes of particles in the mixture.

A mesh is used to discriminate between particle sizes. Particles in the mixture which are larger than the mesh size do not pass through the sieve, hence particles whose size is less than that of the mesh are separated from the rest of the particles in the mixture.

Answer:

l guess c is the answer

Explanation:

it is true because in oxygen does not share any atoms with hydrogen

Answer:

A

Explanation:

taking test currently

Answer:

hypothesis

Explanation:

a hypothesis is a prediction that you make about an experiment.

Explanation:

the treatment of disease by the use of chemical substances, especially the treatment of cancer by cytotoxic and other drugs.

Answer:

China, Mongolia, Russia, and North Korea. They were told to fly at 1400 meters but they flew at 1500 feet making them crash.

Explanation:

Answer:

Water boils - physical change

Salt dissolves in water- chemical change

Milk turns sour- chemical change

metal rusts - chemical change

Explanation:

A chemical change refers to changes that are irreversible and the process involves the evolution of heat along with the formation of a new substance, examples include;Salt dissolves in water, Milk turns sour, metal rusts etc

The boiling of water is a physical change. The water can be cooled and the vapour condensed,hence, the boiling of water is a physical change.

Physical changes are easily reversible and no new substance is formed.

Answer:

Explanation:

The two chambers are at temperature of 27° and pressure of 1 atm . Now temperature of second chamber is increased to 400°C so its pressure will be increased but pressure of chamber whose temperature remains at 27°C will remain unaltered . Hence the pressure of chamber at 27°C will be at 1 atm.

The volume of second chamber is 4 V₀ , temperature changed from 27 + 273  = 300 k to 400 + 273 = 673 K , initial pressure was 1 atm . Let final pressure be P

From gas law  formula

1 x 4 V₀ / 300 = P x  4 V₀ / 673

P = 1 x 673 / 300

= 2.24 atm .

The pressure of the chamber at 400°C  will be 2.24 atm.

Answer:

Chemistry deals with compounds, both organic and inorganic, and agriculture deals with the production of organic products using both organic and inorganic inputs Thus Chemistry forms an integral part of agriculture from molecular to organ level.

Explanation:

i hope this helps you! Have a nice day <33

Answerfcsdv fb fd

Explanation:

Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not.

Answer:

2000 mL

Explanation:

1 L = 1000 mL

Therefore,

2 L = 2 x 1000 mL = 2000 mL

Answer:

Dude just watch the video

Explanation:

Answer:

Explanation:

The answer is rooot ok

the food is prepared in the form of starch in potato and ginger plants the food is stored in the Ender Ground Park gender and potato or underground stems while potato is a tuber Ginger is a rhizome in the food is stored in them in the form of starch so it is prepared in the leaves.

Answer:

Explanation:

The length is usually the longest side.

That would mean that 26.9 is the length.

Answer:

B). Law

Explanation:

A law is defined as the statement of an observed order, sequence, or relationship of a natural phenomenon which is invariable or always true under certain specific conditions while the theory is characterized as the explanation of this observed phenomenon and prediction of the new facts or phenomenon which was previously not observed to set out the new laws or principles of something. Thus, the theory is the base for the formation of law and hence, option B is the correct answer.

Answer:

d

Explanation:

A: mass never increases or decreases. It is a value that is the same everywhere in the universe. A is not correct.

B: it can be but that is not the only unit that can be used

C: A spring scale measures force not mass.

D: The answer to this question is D if the word at the end is balance.

Answer:

mass of substance =50.4 g

Explanation:

Using the density formula;

Density = mass of substance / volume of substance

Therefore, making mass subject of the density formula,

mass of substance = volume of substance / density of substance

volume  of substance = 60.5 mL, density = 1.20 g/mL ( since common units of density is either g/cm³ or g/mL)

mass of the substance = 60.5 mL / 1.20 g/mL

mass of substance = 50.4 g

Answer:

An alkaline solution of glucose acts as a reducing agent and reduces added methylene blue from a blue to a colourless form.

Answer:

In fact, science helps a lot for social, political, ethical, and economic problems. Your question is just to deny that science is not helping your life and you have no evidence to support what you say.

Explanation:

Answer:

An area around a molecule that describes a region of space where the electrons that are shared between bonded atoms can reside

Explanation:

A molecular orbital is an area around a molecule that describes a region of space where the electrons that are shared between bonded atoms can reside.

Molecular orbitals are formed by linear combination of atomic orbitals of about the same energy. The number of atomic orbitals that are combined to give molecular orbitals is the same as the number of molecular orbitals formed. The build up of electrons in molecular orbitals also follow the Aufbau principle, Hund's rule and Pauli exclusion principle.

Answer:false

Explanation:

Answer:

A.

Explanation:

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Xenon(Xe ) is the least abundant element on the earth. The correct option is option A.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

Oxygen, water, and nitrogen are the most abundant molecule on the earth. Xenon is the least abundant amongst all given option. Xenon belongs to noble gas family. So, Xenon is not reactive at all.  Xenon does not form any compound with any other element so its abundance on earth is very less.

Therefore,  Xenon(Xe ) is the least abundant element on the earth. The correct option is option A.

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Answer

1. Magnifier glass.

2. Ruler.

3. Scale.

Explanation:

1. To look and enspect the fish egg's.

2. To see how long and tall the fish egg's are.

3. To weight how heavey the fish egg's are.

Magnifier glass, scale, and ruler tools would a scientist use to study fish eggs  

 To look and inspect the fish egg's scientists will use the magnifier glass . To see how long and tall the fish's eggs are, scientists will use scale. To measure the weight of the fish eggs, scientists will use a ruler.

Hence, Magnifier glass, scale, and ruler tools would a scientist use to study fish eggs.

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Answer and Explanation:

N.B.: Mild steel is steel that has low carbon content, also called carbon steel.

I hope this explanation was helpful.

Answer:

Explanation:

Given :

Heat absorbs , Q = 10 J .

Pressure , [tex]P=0.5 \ atm =0.5\times 101325\ Pa[/tex]

Initial volume , [tex]V_i=4\ L[/tex] .

Final volume , [tex]V_f=2\ L[/tex] .

To Find :

The change in the internal energy .

Solution :

By first law of thermodynamics :

[tex]\Delta U=Q+W[/tex]

Here , W is work done , [tex]W=-P\Delta V=-P\times (V_f-V_i)[/tex]

Therefore,

[tex]\Delta U=Q-P(V_f-V_i)[/tex]

Putting values in SI units in above equation :

[tex]\Delta U=10 -(0.5\times 101325\times (2-4)\times 10^{-3})\\\\\Delta U=111\ J[/tex]

Therefore , option b. is correct .

Hence , this is the required solution .

Answer:

b

Explanation:

Note that : Hypothesis can be regarded as proposed explanation needed for a phenomenon.

The steps involves in scientific method are:

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