What is the net force and direction of the airplane?

The solid object that has a density of 3.26 g/ml has a mass equal to 20.864 g.

If the water level rises to 26.40 ml from an initial of 20.00 ml after a solid object is added, then the difference between the final and initial volume of water is the volume of the solid.

volume of solid = final volume - initial volume

volume of solid = 26.40 ml - 20.00 ml

volume of solid = 6.40 ml

If the solid object has a density of 3. 26 g/ml and a volume of 6.40 ml, using the formula for density, solve for its mass.

density = mass/volume

3. 26 g/ml = mass/6.40 ml

mass = 3. 26 g/ml(6.40 ml)

mass = 20.864 g

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In each question we need to balance the charge to get formula

[tex]Al(CN)_{3}[/tex]) Aluminum Cyanide

[tex]CaSO_{4}[/tex] Calcium Sulfate

[tex]LINO_{3}[/tex] Lithium Nitrate

[tex]NH_{4} CL[/tex] Ammonium Chloride

Ionic interaction is the attractive force between ions with opposite charges. Also called an ionic bond, it is the force that holds ionic compounds together. Like charges repel and opposite charges attract.

Intermolecular interactions occur between molecules or atoms that are not connected by bonds. Molecular interactions include cohesion (like-like attraction), adhesion (like-like attraction), and repulsion between molecules.

Divide the molar mass of the compound by the molar mass of the molecular formula. The result will be an integer or very close to an integer. Multiply all subscripts of the molecular formula by the integers found in step 2. The result is the sum formula

Hence, the result will be the sum formula

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the mass of carbon required to produce

17.6 g of carbon dioxide will be 6 gram.

In the reaction,

C+ O₂ → CO₂

Given,

The atomic mass of Carbon is 12g/mol

molar mass of O2 is 32g/mol

1 mole of C get reacted with 1 mole of O2.

no. of moles in O₂ = 16/32 = 0.5

so, 0.5 moles of Ow will react with 0.5 moles of C

Moleculer weight of Carbon is 12

Mass of carbon = 0.5 × 12 = 6 gm

Hence, mass of carbon required is 6 g.

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The correct answer is 2.3×[tex]10^{-11}[/tex]

The auto-ionization constant of water is related to the dissociation constant of an acid or base with its conjugate:

KaKb =Kw=1×10⁻¹⁴

Constant of acid dissociation

Calculations of an acid dissociation constant are used to quantify an acid's potency.

When HA, a chemical species, dissociates into A- and H+ at equilibrium, the acid dissociation constant is utilized. The conjugate base of the acid is the anion.

When both the forward and backward reactions proceed at the same rate, the reaction is in equilibrium.

Acid strength is typically measured using the pKa, which is equal to the negative log of the Ka value. Stronger acids are those with smaller pka values and larger Ka values, respectively. Here is a calculation of acid dissociation.

Ka=1×10⁻¹⁴/4.4×10⁻⁴

=2.3×10⁻¹¹

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Answer: penlalalalaooooaaaaaaaaaaa

Explanation: pen

The investigator should show that the organism was not sterile before the experiment began. So the correct option is A.

A scientific hypothesis is a theory that offers a speculative explanation for a phenomenon or a specific group of related events that have been observed in the natural world. The capacity to be supported or disproven by observation and experimentation are the two main characteristics of a scientific hypothesis, and they are embodied in an "If...then" statement that summarises the notion. In the middle of the 20th century, British philosopher Karl Popper, who was of Austrian descent, established the idea that a scientific theory might be both falsified and tested.

The scientific method, the strategy used by scientists to try to comprehend and evaluate theories regarding natural events, includes the formation and testing of hypotheses. The process of developing a hypothesis is commonly referred to as creative and is based on prior scientific understanding, intuition, or experience.

Therefore, the correct option is A.

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In the image provided below, you can see the structure of 1,3-dinitrocyclopentane.

We can conclude the following information from the compound's name, 1,3-dinitrocyclopentane, which will assist us in drawing the structure :-

1,3 - position of NO₂ groups, di - two, nitro - NO₂, clo - cyclic, pentane - five.

➤ The following are the general steps for drawing any compound's        Lewis structure:

According to the Octet Rule almost all atoms, in this case, carbon must always have four bonds because they are most stable with eight total electrons.

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Ionic bonds and hydrogen bonds rely on the attraction of positive and negative charges.

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Moles = mass/molar mass

mass= 6.29 g.

molar mass = 16.04 g .

Moles of methane collected are = 6.29/16.04

= 0.39.

0.39 moles of methane gas was collected.

Hydrocarbon methane (CH4) is a main constituent of natural gas. Because methane is a greenhouse gas (GHG), its presence in the atmosphere has an impact on the planet's climate and temperature. There are many anthropogenic (influenced by humans) and natural sources that release methane.

High methane levels may reduce the amount of oxygen breathed from the air. This can cause symptoms like headaches, face flushing, slurred speech, visual problems, memory loss, mood swings, and altered eyesight. In dire circumstances, it's possible to have changes in breathing and heart rate, balance problems, numbness, and unconsciousness.

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79.91 g moles of copper were in the copper oxide formed.

Using the molar mass of 125.00 grams of copper (II) sulfate pentahydrate (CuSO45H2O), we first determine how many moles there are:

(Molar Mass of CuSO4) + 5*(Molar Mass of H2O) = Molar Mass of CuSO45H2O.

CuSO45H2O's molar mass is equal to 249.68 g/mol moles. CuSO45H2O = 125.00 g x 249.68 g/mol x 0.501 mol

CuSO4 and 5H2O undergo a reaction, resulting in CuSO4.

Using the molar mass of CuSO4, we can now convert 0.501 moles of anhydrous copper (II) sulfate into grams:

79.91 g CuSO4 is equal to 0.501 mol CuSO4 times 159.609 g/mol.

The most prevalent form of copper(II) sulfate hydrate is the pentahydrate (n = 5). The pentahydrate has also gone by the names blue vitriol, bluestone, copper vitriol, and Roman vitriol in the past. The most prevalent form of copper(II) sulfate is the vivid blue pentahydrate CuSO45H2O.

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Answer:

Yes, at 801 °C

Explanation:

Viscosity  is the experimental parameter used to assess a liquid's resistance to flow.

Viscosity is the ability of a fluid (liquid or gas) to resist changing its shape or allowing nearby parts to move in relation to one another. Viscosity is a sign of flow resistance.

The fluidity, a metric indicating the ease of flow, is the reciprocal of viscosity. For instance, molasses is more viscous than water.

The viscosity of a liquid is a significant metric because the user may interpret it as a gauge of quality; in some cases, a thicker liquid may be perceived as having higher quality than a thinner one.

The texture of food also has a property called viscosity.

Therefore, viscosity  is the experimental quality that serves as a measure of resistance to flow of a liquid.

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Answer:

C - switch the 3 and the 4

The way I did it is by rewriting the equation again but without the numbers and just balancing it myself

The chemical properties could be obtained by adding acid to the plastic to see if it reacts.

Chemical properties are those properties that could only be observe when a substance undergoes chemical change. In this case, a chemical change could also be called a chemical reaction.

A substance could be said to undergo a chemical reaction  if there is a rearrangement of the atoms of the compound. This would ultimately lead to the formation of a new substance.

Now the forensic scientist wants to know the chemical properties of the plastic. This could be done by reacting the plastic with acid.

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Answer:

The short answer is (C)  Add acid to the plastic to see if it reacts

Explanation:

Got it right on my quiz.

the molalities of the following aqueous solutions: (a) 1.036 m sugar (c12h22o11) solution (density of solution = 1.095 g/ml)

Molality = 1.096/(3.029 * 10 ^ -3) = 361.8 m

What is molality?

Molality is the ratio of moles of solute to kilogrammes of solvent (m). The following is the molality formula:

Molality (m) = kilogrammes of solvent / moles of solute.

Molality is the ratio of moles of solute to kilogrammes of solvent (m). Students should keep in mind that the moles are measured in proportion to the mass of the solvent and not the mass of the solution while using the molality formula, which is presented as follows.

Density = m/ volume = 1.095g/ml

Thus, weight of solvent = 1.095g for 1 ml

Moles of solvent = 1.036/342 moles = 3.029 * 10 ^ -3

Molality = 1.096/(3.029 * 10 ^ -3) = 361.8 m

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Mycolic acids are found in the cell wall of acid-fast bacteria, preventing these cells from being gram-stained.

Acid-fast bacteria are a kind of bacteria that contains waxy material called mycolic acid in their cell wall making them water-resistant against staining procedures and materials such as gram stain.

Mycolic acids are lengthy chains of fatty acids found in bacteria and, therefore, are called acid-fast bacteria.

When these bacteria come into contact with substances like acidic alcohol, they develop resistivity against them to prevent decolorization.

In short, mycolic acids prevent the decolorization and staining of bacteria due to their characteristics of resistance and reluctance.

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Answer:

It's the last option,

Explanation:

In a chemical reaction, the mass of the reactants must equal the total mass of the products, assuming that the reaction has gone to completion.

Meaning that option D is correct (last one)

Don't forget to click thanks!!:)

Answer: anwser D

Explanation: HOPE THIS HELPS!!!

The mole fraction of acetyl bromide is 0.534 and heptane is 0.466.

An acyl halide, sometimes referred to as an acid halide, is a chemical molecule created by swapping out the hydroxyl group in an oxoacid with a halide group.

The chemical has a -COX functional group, which is made up of a carbonyl group that is singly linked to a halogen atom, if the acid is a carboxylic acid. The general formula for such an acyl halide can be represented as RCOX, where X stands for the halide, such as chloride, and R may be, for example, an alkyl group. Although acyl chlorides are the most frequent acyl halides, acetyl iodide is the one that is created (temporarily) on a big scale. The annual manufacturing of acetic acid results in billions of kilograms.

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Answer:

sulfuric acid + sodium hydroxide -> sodium sulfate + water

NaOH (aq) + H₂SO₄ (aq) → Na₂SO₄ (aq) + H₂O

(″ロ゛) x

The accuracy of the results could be improved by;

1) The use of porcelain to observe the end point

2) Rinsing the burette with the ethanedioic acid solution before the titration begins.

The term titration has to do with the process by which we use a neutralization reaction to be able to determine the concentration of substances that participate in the reaction. Now we know that titration is one of the ways by which we are able to carry out a volumetric analysis. The term volumetric analysis has to do with the type of analysis that involves the use of the volume of the analyte.

The titrant is put into the flask and the titrand is put in the burette. We always have to make use of an indicator to be able to know when the end point or the equivalence point of the reaction have been achieved in the process of the titration.

The accuracy of the results could be improved by;

1) The use of porcelain to observe the end point

2) Rinsing the burette with the ethanedioic acid solution before the titration begins.

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The structure of 4‑sec‑butyl-5-ethyl-3-methyl octane has 4 ethyl groups and 2 methyl groups.

Since ethyl and methyl groups are saturated, there are no double or triple bonds between the atoms in these compounds. The main distinction between ethyl and methyl is that the former is made up of two carbon atoms while the latter is made up of just one. It is customary to write the chemicals' names in alphabetical order, so ethyl comes before methyl and then precedes propyl. The carbon atoms in a cycloalkane are linked together in a ring, hence the name. Just two types of alcohol are methanol and ethanol. Ethanol, also referred to as ethyl alcohol, has a chemical composition of two carbon atoms. Methanol also referred to as methyl alcohol, is made up of just one carbon atom.

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The density of chromium is 7.15 g/cm³.

There is three types of cubic cell:

1) simple cubic unit cell.

2) body-centered cubic unit cell.

3) face-centered cubic-unit cell.

In body-centered cubic unit cell there are two atoms in one cell.

m(Cr) = 52 amu; mass of chromium atom

r(Cr) = 125 pm; the radius of a chromium atom

V(Cr) = 4/3 × r³ × π

V(Cr) = 4/3 × (1.25×10⁻⁸cm)³ × 3.14

V(Cr) = 8.18×10⁻²⁴ cm³; the volume of chromium atom

d(Cr) = 52 / 8.18×10⁻²⁴ cm³ × 2 × 6.022×10²³

d(Cr) = 7.15 g/cm³; density of a chromium atom

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The volume occupied by 0.102 mole of the helium gas is 2.69 L

The following data were obtained from the question:

The volume of the gas can be obtained by using the ideal gas equation as illustrated below:

PV = nRT

Divide both sides by P

V = nRT / P

V = (0.102 × 0.0821 × 305) / 0.95

V = 2.69 L

Thus, the volume of the gas is 2.69 L

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As an example option C. A lizard is cold, and it moves to a sunny rock to warm up,  hows an organism that cannot reach homeostasis through internal changes.

Homeostasis is the nation of steady internal, bodily, and chemical conditions maintained via dwelling systems. that is the circumstance of gold standard functioning for the organism and consists of many variables, which include body temperature and fluid balance, being kept inside certain pre-set limits.

Homeostasis is the ability to keep a quite stable internal kingdom that persists regardless of modifications within the world outside. All dwelling organisms, from flora to puppies to human beings, must alter their internal environment to procedure power and ultimately continue to exist.

Homeostasis is maintained by using a series of manipulation mechanisms performed at the organ, tissue, or cell degree. these management mechanisms include substrate supply, activation or inhibition of person enzymes and receptors, synthesis and degradation of enzymes, and compartmentalization.

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Molality and molarity are same = 5.23M

(a)Molarity =  moles of solute /  volume of solution (in L)

​Molarity =  mass of solute /   molecular weight of solute × volume of solution (in L)

Molarity =  11.0 / 20.01 × 0.105

​5.23M = Molarity

(b) Molality =  moles of solute /  volume of solution (in kg)

Molality = mass of solute /   molecular weight of solute × volume of solution (in kg)

Molality = 11.0 / 20.01 × 0.105

​5.23M = Molality

Hence, both molality and molarity are same = 5.23M

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Sarah knows that chalk has the same chemical make-up as limestone and she knows that acid rain is primarily made up of carbonic acid at a ph around 5.7. So the correct option is (B) Sarah's materials are cheaper and easier to obtain, but Evan's materials will allow him to better mimic real life.

Limestone is a sedimentary rock mostly made of calcium carbonate (calcite) or calcium and magnesium double carbonates (dolomite). Small fossils, shell pieces, and other fossilised debris are frequently found in its composition.

Calcium oxide, which is derived from limestone, is used in the manufacture of steel, mining, paper, water treatment and purification, and plastics. Lime is extensively used in agriculture and the production of glass.

The biggest myth about limestone is that it's a delicate stone. Actually, limestone can be anything from extremely hard to soft. It should be selected keeping in mind the final design while paying close attention to its intended usage.

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The complete question is ''Sarah and Evan are in the same science class. The teacher asks the class to design an experiment to determine the effect of acid rain on limestone. Sarah designs an experiment which uses chalk and carbonic acid at a pH of 5.7, because she knows that chalk has the same chemical make-up as limestone and she knows that acid rain is primarily made up of carbonic acid at a pH around 5.7. Evan designs an experiment which uses limestone tiles and acid rain collected from the environment. How do these experimental methods compare?

A. Sarah's experimental results will be easier to predict. Evan's results will be impossible to predict since he uses real acid rain.

B. Sarah's materials are cheaper and easier to obtain, but Evan's materials will allow him to better mimic real life.

C. Evan's experimental design will prevent him from being able to form a logical conclusion, whereas a conclusion can be made with Sarah's design.

D. Evan's experiment can be preformed at any time, but Sarah's experiment can only be performed when there is a rainstorm.

Answer:

Evaporate a solution of  CuSO4⋅5H2O to dryness

Explanation:

To dehydrated you have to get rid of the water and water evaporates so you have to evaporate the solution.

Procedure that could be used to convert the pentahydrate form to the dehydrated form is to evaporate a solution of CuSO₄⋅5H₂O to dryness.

Copper(II) sulfate pentahydrate (CuSO₄·5H₂O) form aqueous solutions of bright blue.

After the heating, dehydrated form copper(II) sulfate is formed.

Salt copper(II) sulfate has white color.

Adding a water in white copper(II) sulfate would make solution blue again.

Hydrate is a substance that contains water or its constituent elements.

M(CuSO₄·5H₂O) = 249.5 g/mol; molar mass of copper sulphate pentahydrate

Evaporation occurs when the molecules at the surface of a liquid gain enough energy to overcome the force of attraction of other molecules in the liquid phase.

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Answer:

Due to the fact that halogens have an outer shell made up of seven valence electrons, they frequently obtain an additional electron and a negative charge.