• Briefly discuss the cause of errors in the measurements

Answers

Answer 1
(also called Observational Error) is the difference between a measured quantity and its true value. It includes random error

Related Questions

The diameter of a red blood cell is about 3 × 10−4 in. What is its diameter in centimeters?

Answers

Answer:

1 in. =2.54 cm

3*(10^-4)*2.54=7.62*10^-4

Explanation:

7.62 • 10^ -4 explanation in photo
The diameter of a red blood cell is about 3 104 in. What is its diameter in centimeters?

Wich of the following does not directly affect the weather

Answers

Answer:

Tings that effect weather is basically the following:

Distance from seaAltitudeDistance to the equator or poles.MountainsJet streams,etc

a propane tank containing 55L has 2.46 moles of the gas. (C3H8!) What would be the number of moles if 1/2 of the gas is used?

Answers

number of moles used:

1/2 x 2.46 moles = 1.23

number of moles left:

2.46 - 1.23 = 1.23 moles

Metallic atoms tend to _____ valence electrons to produce a positively charged ion. Most nonmetallic atoms achieve a complete octet by gaining or _____ electrons.

Answers

In order to create a positively charged ion, metallic atoms frequently lose their valence electrons. Nonmetallic atoms acquire or share electrons to form a full octet.

Metal atoms form metallic connections. Ionic bonds link metals to non-metals, whereas metallic bonds link a large number of metal atoms. Metallic bonding can be observed in action on copper wires and sheets of aluminium foil. When the charge is dispersed over a broader area than the size of a single atom in a solid, metallic bonds are created. Most left-handed elements in the chemical elements, including zinc and copper, form metal connections. Metals have regular arrangements of closely packed atoms because they are solid materials.

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write the products that form for the following reaction Al + Ca(NO3)2

Answers

The following balanced chemical equation may be used to describe the interaction between aluminum (Al) and calcium nitrate (Ca(NO₃)₂):

2 Al + 3 Ca(NO₃)₂ → 2 Al(NO₃)3 + 3 Ca

Reactants are the chemicals that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.

The substances that initiate a chemical reaction. Products are the substances that are created during the reaction. Compounds or elements can act as reactants and products.

Aluminium and calcium nitrate interact in this reaction to form aluminium nitrate (Al(NO₃)₃) and calcium (Ca), which are the end products.

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Be sure to answer all parts. A sample of a compound consisting only of copper and sulfur contains 88.39 g of metal and 44.61 g of nonmetal. How many grams of copper are in a 5264−kg sample of the compound? How many grams of sulfur? Enter your answers in scientific notation.

Answers

Answer:

Amount of copper in 5264 kg compound = 3,498,383 g

Amount of sulfur in 5264 kg compound  = 1,765,616.8 g

Explanation:

Given:

Amount of copper = 88.39 g

Amount of sulfur = 44.61 g

Total quantity = 5264 kg

Find:

Amount of copper in 5264 kg compound = ?

Amount of sulfur in 5264 kg compound  = ?

Computation:

Total amount in compound =  Amount of copper + Amount of sulfur

Total amount in compound =  88.39 g + 44.61 g

Total amount in compound = 133 g

⇒Amount of copper in 5264 kg compound = 5,264 [88.39 / 133]

Amount of copper in 5264 kg compound = 3,498.3831 kg

Amount of copper in 5264 kg compound = 3,498,383 g

⇒Amount of sulfur in 5264 kg compound  = 5,264 [44.61 / 133]

Amount of sulfur in 5264 kg compound  = 1,765.6168 kg

Amount of sulfur in 5264 kg compound  = 1,765,616.8 g

students in a biology class are studying the effects of temperature on the aquatic plant elodea. They count the number of oxygen. bubbles released by an elodea plant in a beaker of water heated to different temperatures

Answers

From the given graph plotting the rate of photosynthesis versus the temperature, the rate of oxygen production is greatest at the point M.

What is photosynthesis?

Photosynthesis is the biochemical process of synthesising chemical energy by green plants  with the aid of light energy. The photosynthetic reaction involves the combination of carbon dioxide and water producing oxygen gas and glucose.

The chemical energy is stored in plants in the form of glucose which is then break down by the need of energy forming ATP.  The photosynthetic reaction is affected by the temperature and pressure of the atmosphere.

From the graph, it is clear that, the rate of photosynthesis is higher at the point M. Higher the rate of photosynthesis, higher will be the oxygen production. Hence, option B is correct.

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students in a biology class are studying the effects of temperature on the aquatic plant elodea. They

What are constraints

Answers

Answer:

ndcuffaStuff that restrains you from something or someone basicially handcuffs or shackles

Explanation:

Answer:

a limitation or restriction.

OR

stiffness of manner and inhibition in relations between people.

Why does CO2 have a higher boiling point than CH4 when they both possess dispersion forces?

Answers

CO₂ have a higher boiling point than CH₄ when they both possess dispersion forces because CO₂ consists of polar bonds between carbon and oxygen.

Intermolecular forces determine bulk properties, such as the melting points of solids and the boiling points of liquids.

Liquids boil when the molecules have enough thermal energy to overcome the intermolecular attractive forces that hold them together, thereby forming bubbles of vapor within the liquid.

CO₂ have a higher boiling point than CH₄ when they both possess dispersion forces because CO₂ consists of polar bonds between carbon and oxygen. The polarity increases the boiling point of the molecule.

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At constant pressure, the temperature of a 3 L sample of gas is increased from 250 K to 300 K. What is the new volume of the gas sample?

Answers

The new volume of the gas sample is approximately 3.6 L.

According to the ideal gas law, PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the gas constant, and T is temperature in Kelvin. If pressure is constant, we can use the formula V1/T1 = V2/T2 to find the new volume of the gas sample.

V1/T1 = V2/T2

V2 = (V1 x T2)/T1

V2 = (3 L x 300 K) / 250 K

V2 = 3.6 L

Therefore, the new volume of the gas sample is approximately 3.6 L. As the temperature of the gas sample increased from 250 K to 300 K, the volume increased proportionally since pressure was held constant.

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Put the following in order from SMALLEST to LARGEST: cell, nucleus, gene,
chromosome, DNA, organism,

Answers

Answer:

Here is the correct order (ascending order):

gene, DNA, chromosome, nucleus, cell, organism.

A gene is a segment of DNA that contains the instructions for building a protein or RNA molecule. DNA is the molecule that carries genetic information and makes up genes. A chromosome is a structure made of DNA and protein that carries genes. A nucleus is a membrane-bound organelle that contains chromosomes. A cell is the smallest structural and functional unit of living organisms, consisting of a nucleus (or nucleoid in prokaryotes) and cytoplasm. An organism is an individual living entity, such as a plant, animal, or bacterium, that consists of multiple cells.

Calculate AHræn for the following reaction
2 AX (g) + 7 BY (g) →4AY (g) + 6 BX (g)
Use the following AHformation values for AX, BY, AY and BX
AX: AHformation = -80 kJ/mol
BY: AH formation = 57 kJ/mol
AY: AHformation = -379 kJ/mol
BX: AHformation = -251 kJ/mol

Answers

Answer:

60ax 70by 67ay ah251

Explanation:

Please help with whatever this is and go in number order

Please help with whatever this is and go in number order

Answers

1.a- sodium(Na) b-nickel(Ni) c-iron (Fe)

Engineers increase the concentration of uranium-235 atoms in nuclear fuelduring what process?A. Uranium-235 modificationB. Half-lifeC. Nuclear fuel modificationD. Enrichment

Answers

Explanation:

The majority of nuclear reactors use the isotope uranium-235 as fuel; however, it is only a small part of the natural uranium mined. The concentration must be increased through a process called enrichment. Enrichment is the process of increasing the concentration of uranium-235 atoms in nuclear fuel.

Answer: D. Enrichment

The irreversible isomerization A
B was carried out in a batch reactor and the following concentration time data were obtained:

Time vs Concentration data in a Batch reactor
t 0 3 5 8 10 12 15 7.5

mol/h 4 2.89 2.25 1.45 1.0 0.65 0.25 0.07
Determine the reaction order,
, and the specific reaction a rate constant, k, using any method of your choice.

The irreversible isomerization A B was carried out in a batch reactor and the following concentration

Answers

The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

The term "kinetics" refers to the study of reaction rates, which are determined by measuring the concentration of reactants and products as a function of time.Kinetics experiments can be used to determine the reaction rate and order of reaction. A chemical reaction's rate is defined as the change in the concentration of a reactant or product per unit time. The order of a reaction refers to the number of molecules that must react to produce a product. The order of reaction can be determined by measuring the initial rate of the reaction as a function of concentration.Methods for determining the reaction rate order include the initial rate method, the half-life method, and the integrated rate method. The initial rate method determines the reaction order by measuring the initial rate of the reaction at different reactant concentrations. The half-life method determines the reaction order by measuring the time it takes for the reactant concentration to decrease by half.The integrated rate method determines the reaction order by measuring the concentration of the reactant or product at different times.The specific rate constant can be determined by using the Arrhenius equation, which relates the rate constant to the activation energy, temperature, and frequency factor. The frequency factor can be determined by measuring the rate constant at different temperatures.

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What is the final temperature after 840 Joules is absorbed by 10.0g of water at 25.0
C?

Answers

The final temperature of the water is: T_final = 45.0°C

We can use the formula for the specific heat capacity of the water to solve this problem:

q = mcΔT

First, we can calculate the initial energy of the water:

q = mcΔT

q = (10.0 g) (4.184 J/g°C) (25.0°C)

q = 1,046 J

Next, we can calculate the final temperature after absorbing 840 J:

q = mcΔT

840 J = (10.0 g) (4.184 J/g°C) (ΔT)

ΔT = 20.0°C

Therefore, the final temperature of the water is:

T_final = T_initial + ΔT

T_final = 25.0°C + 20.0°C

T_final = 45.0°C

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the valency of magnesium is 2 why

Answers

The valency of magnesium is 2 because it has two valence electrons in its outermost shell. Magnesium belongs to the second group of the periodic table, which means it has two electrons in its outermost shell or valence shell. In order to achieve a stable configuration, magnesium tends to lose these two valence electrons to form a positively charged ion with a charge of 2+. This makes magnesium a bivalent or divalent element with a valency of 2.

Answer:

Because the outer shell of magnesium contains 2 atoms

7. What is the volume of the
composite
solid?
4 in.
3 in.
3 in.

7. What is the volume of thecompositesolid?4 in.3 in.3 in.

Answers

Answer:

The volume of Component 1 is 36 cubic inches.

Explanation:

To calculate the volume of a composite solid, we need to determine the individual volumes of the different components and then add them together.

In this case, the composite solid consists of multiple components with the following dimensions:

Component 1:

Length: 4 inches

Width: 3 inches

Height: 3 inches

To find the volume of Component 1, we multiply the length, width, and height together:

Volume of Component 1 = Length x Width x Height = 4 in x 3 in x 3 in = 36 cubic inches

Therefore, the volume of Component 1 is 36 cubic inches.

Please provide the dimensions of the remaining components of the composite solid, and I will calculate the total volume by summing up the individual volumes.

What is the characteristic of atoms

Answers

Answer:

Most of the atom is empty space. The rest consists of a positively charged nucleus of protons and neutrons surrounded by a cloud of negatively charged electrons. The nucleus is small and dense compared with the electrons, which are the lightest charged particles in nature.

how to solve stoichiometry problem in a synthesis reaction with iron metal and oxygen gas, what mass of iron metsl is required to produce 456.0g of ferric oxide?​

Answers

Answer:

319.2 g of iron metal

Explanation:

We'll begin by writing the balanced equation for the reaction between iron (Fe) and oxygen (O₂) to produce ferric oxide (Fe₂O₃). This is illustrated below:

4Fe + 3O₂ —> 2Fe₂O₃

Next, we shall determine the mass of Fe that reacted and the mass of Fe₂O₃ produced from the balanced equation. This can be obtained as follow:

Molar mass of Fe = 56 g/mol

Mass of Fe from the balanced equation = 4 × 56 = 224 g

Molar mass of Fe₂O₃ = (56×2) + (16×3)

= 112 + 48

= 160 g/mol

Mass of Fe₂O₃ from the balanced equation = 2 × 160 = 320 g

SUMMARY:

From the balanced equation above,

224 g of Fe reacted to produce 320 g of Fe₂O₃.

Finally, we shall determine the mass of iron metal, Fe, required to produce 456 g of ferric oxide, Fe₂O₃. This can be obtained as follow:

From the balanced equation above,

224 g of Fe reacted to produce 320 g of Fe₂O₃.

Therefore, Xg of Fe will react to produce 456 g of Fe₂O₃ i.e

Xg of Fe = (224 × 456)/320

Xg of Fe = 319.2 g

Thus, 319.2 g of iron metal, Fe is required to produce 456 g of ferric oxide, Fe₂O₃.

Which amphibian organ has a high blood supply and many folds to increase surface area?
a. heart
b. stomach
c. lungs
d. brain

Answers

Answer:

lungs

Explanation:

I think the answer is the lungs because they allow for increased surface area.

ch4+br2 ch3br+hbr which type of reaction does this equation represent

Answers

To solve such this we must know the concept of combination reaction. Therefore, the given reaction CH\(_4\)+Br\(_2\) \(\rightarrow\)CH\(_3\)Br+ HBr is a combination reaction.

What is chemical reaction?

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

CH\(_4\)+Br\(_2\) \(\rightarrow\)CH\(_3\)Br+ HBr

The above reaction is a combination reaction. In combination reaction, more than one reactant combine to form a product. Because new chemicals are created during combination reactions, they are often referred to as synthesis.

Therefore, the given reaction is a combination reaction.

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Please help me with this I’ll give you extra credit it’s due in 10 minutes thank youuu!!! :))

Answers

Answer:

Okay ask away. . . You haven't asked anything that we would be able to answer


Which best describes the reactants and products of photosynthesis

Answers

Answer:

Depends on what the answers say.

Explanation:

But from what I know, the equation is:

6CO2 + 6H2O------> C6H12O6 + 6O2

And also that arrow there should mean in the presence of sunlight and chlorophyll.


Which best describes the reactants and products of photosynthesis

Answer: The reactants for photosynthesis are light energy, water, carbon dioxide and chlorophyll, while the products are glucose (sugar), oxygen and water.

Which renewable resource is used to generate electricity? A coal B phosphate C silica D water

Which renewable resource is used to generate electricity? A coal B phosphate C silica D water

Answers

Option  D. Water is a renewable resource that can be used to generate electricity through a process called hydropower.

Hydropower is a clean and sustainable method of producing electricity, as it does not involve the burning of fossil fuels like coal, which contributes to air pollution and climate change.

In hydropower systems, the kinetic energy of flowing or falling water is harnessed and converted into electrical energy. This is typically achieved by constructing a dam across a river or using a run-of-the-river system, which does not require a large reservoir. As water flows through the dam or system, it turns a turbine connected to an electric generator, producing electricity.

To summarize, water is a renewable resource that can be effectively utilized to generate electricity through hydropower, offering a sustainable, clean, and reliable alternative to non-renewable resources like coal, phosphate, and silica. Therefore the correct option D

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what is the mass of solute dissolved in 10.0 g of 5.00% Sugar solution?
A. 0.900 g
B. 0.180 g
C. 10.0 g D. 0.500 g
E. 9.50 g​

Answers

Answer:

0.5 g  or D

Explanation:

what is the mass of solute dissolved in 10.0 g of 5.00% Sugar solution?

A. 0.900 g

B. 0.180 g

C. 10.0 g

D. 0.500 g

E. 9.50 g

5% of the solution is sugar

o 10 g of the solution will have 9.5 g H2O and  0.5 g of sugar

0.5 /(9.5 +0.5) = 0.5/10 = 0.05 = 5 PER HUNDRED = 5%

so 0.5 g  or D

Is ginger ale good for gas pains?

Answers

Answer:

Search it up. It says it on this link:

Titanium is softer than gold. Yes? Or No?

Answers

Answer:

Yes it is softer than gold

Answer:

No

Explanation:

If you were to try to squeeze regular, hardened Titanium it would break you hand before it bends. If you were to squeeze gold however, it would practically become modeling clay that's worth more then a human heart!

During the reaction: Mg(s) + CuSO4(aq)
es)
MgSO4(aq) + Cu(s), what changes occur to magnesium?

A)Its oxidation number changes from +2 to 0 and it is reduced.
B)Its oxidation number changes from 0 to +4 and it is reduced.
C)Its oxidation number changes from 0 to +2 and it is oxidized.
D)Its oxidation number changes from +2 to +4 and it is oxidized.

Answers

Answer:

C

Explanation:

I did it on usatestprep

The picture shows a model of the internal structure of Earth.

Which evidence best supports the different characteristics of each layer in this model?

evaluations of seismic data

direct observations of the layers

explanations of the rock cycle

samples of rocks from the layers

Answers

Answer:evaluations of seismic data

Explanation:

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The penetration equation may be written as , where lambda is the penetration depth, (a) Show that B(x) inside a superconducting plate perpendicular to the x axis and of thickness delta is given by where Bn is the field outside the plate and parallel to it; here x = 0 is at the center of the plate, (b) The effective magnetization M(x) in the plate is defined by B(x) = Ba = 4 pi M(X). Show that, in CCS. In SI we replace the 4 pi by mu 0. hunting-and-gathering societies . group of answer choices support the basis of the argument that a man is a breadwinner while a woman is a caregiver challenge the basis of the argument that a man is a breadwinner while a woman is a caregiver created the concept that a man is a breadwinner while a woman is a caregiver reflect similar overall gender norms of today This is the question I need help with. 3. In the long run, the aggregate price level has A. No effect on the quantity of aggregate output. B. 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