for the balance equation shown below what would be the limiting reagent A 42. 3 g of N2O5 were reacted with 9.18 g of H2O?N2O5 + H2O — > 2HNO3

Answer:

If your asking what golds natural state of matter is it's solid.

Explanation:

Answer:

the answer is soild

Explanation:

i did it on edge :)

The half-life of the carbon-14 obtained from the graphical representation of radioactive material remaining in a sample versus time is 5730 years.

The half-life a radioactive material is the time taken for half the material to decay or disintegrate.

For example, if the initial mass of a material is 10 g and the material becomes 5 g after 2 days. Then, we can say that the half-life of the material is 2 days.

With the above information in mind, we can obtain the half-life of the carbon-14 as illustrated below:

From the graph, we obtain:

Now, we shall obtain the time for 1/2 in the graph.

The time for 1/2 in the graph is 5730 years.

Thus, we can conclude that the half-life of the carbon-14 is 5730 years.

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There are approximately 1.62 x 10^25 water molecules in the 499.8 mL bottle of water.

To determine the number of water molecules in the given volume of water, we need to use the relationship between mass, volume, and molar mass of water.

First, we need to find the mass of water in the bottle:

Mass = Density * Volume

Mass = 0.967 g/mL * 499.8 mL = 483.9 g

Next, we need to convert the mass of water to moles using the molar mass of water. The molar mass of water (H2O) is approximately 18.015 g/mol.

Moles = Mass / Molar mass

Moles = 483.9 g / 18.015 g/mol = 26.88 mol

Finally, we can calculate the number of water molecules using Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules = Moles * Avogadro's number

Number of molecules = 26.88 mol * (6.022 x 10^23 molecules/mol) = 1.62 x 10^25 molecules

Therefore, there are approximately 1.62 x 10^25 water molecules in the 499.8 mL bottle of water.

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Answer:

1.  the absolute pressure in the tank before filling = 217 kPa

2. the absolute pressure in the tank after filling = 312 kPa

3. the ratio of the mass after filling M2 to that before filling M1 = 1.44

The correct relation is option c (\(\frac{M_{2} }{M_{1} } = \frac{P_{2} T_{1} }{P_{1} T_{2} }\))

Explanation:

To find  -

1. What is the absolute pressure in the tank before filling?

2. What is the absolute pressure in the tank after filling?

3. What is the ratio of the mass after filling M2 to that before filling M1 for this situation?

As we know that ,

Absolute pressure = Atmospheric pressure + Gage pressure

So,

Before filling the tank :

Given - Atmospheric pressure = 100 kPa ,  Gage pressure = 117 kPa

⇒Absolute pressure ( p1 )  = 100 + 117 = 217 kPa

Now,

After filling the tank :

Given - Atmospheric pressure = 100 kPa ,  Gage pressure = 212 kPa

⇒Absolute pressure (p2)  = 100 + 212= 312 kPa

Now,

As given, volume is the same before and after filling,

i.e. \(V_{1}\) = \(V_{2}\)

As we know that, P ∝ M

⇒ \(\frac{p_{1} }{p_{2} } = \frac{m_{1} }{m_{2} }\)

⇒\(\frac{m_{2} }{m_{1} } = \frac{p_{2} }{p_{1} }\)

⇒\(\frac{m_{2} }{m_{1} } = \frac{312 }{217 } = 1.4378\) ≈ 1.44

Now, as we know that PV = nRT

As V is constant

⇒ P ∝ MT

⇒\(\frac{P}{T}\) ∝ M

⇒\(\frac{M_{2} }{M_{1} } = \frac{P_{2} T_{1} }{P_{1} T_{2} }\)

So, The correct relation is c option.

Answer:

Explanation:

The percentage error of a certain measurement can be found by using the formula

\(P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ \)

From the question

actual density = 19.30g/L

error = 20.9 - 19.3 = 1.6

We have

\(p(\%) = \frac{1.6}{19.3} \times 100 \\ = 8.290155440...\)

We have the final answer as

Hope this helps you

According to the given description the chemical formula for the molecule represented by the model is C₄H₉O₂.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

There are four types of chemical formula:

1)empirical formula

2) structural formula

3)condensed formula

4)molecular formula

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According to the research, the correct answer is solidification and condensation. These processes that decrease the motion of particles.

Solidification refers to the state that can be produced by the compression of the matter in question or by a drop in temperature, decreasing the kinetic energy of the particles, favoring the appearance of cohesive forces between them.

In this sense, condensation is the process of transforming a gaseous body into a liquid, by decreasing the temperature, decreasing the energy contained in the gas particles, therefore their motion.

Therefore, we can conclude that solidification and condensation are processes that imply a decrease in temperature and therefore decreases the motion of particles by losing energy.

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It would require approximately 600 kilojoules of energy to vaporize 2 kg of copper.

To calculate the energy required to vaporize a substance, we need to consider the heat of vaporization, which is the amount of energy required to convert a given amount of substance from its liquid state to its gaseous state at a constant temperature.

The heat of vaporization for copper is approximately 300 kJ/kg (kilojoules per kilogram) at its boiling point, which is around 2567 degrees Celsius (4649 degrees Fahrenheit). This means that for every kilogram of copper, 300 kJ of energy is needed to vaporize it.

Given that you have 2 kg of copper, we can calculate the total energy required as follows:

Energy = Heat of Vaporization × Mass

Energy = 300 kJ/kg × 2 kg

Energy = 600 kJ

Therefore, it would require approximately 600 kilojoules of energy to vaporize 2 kg of copper.

It's worth noting that the heat of vaporization can vary slightly depending on the purity of the copper and the specific conditions, such as temperature and pressure. The value provided here is an approximation. Additionally, it's important to handle copper and any high-temperature processes with caution, as they can pose safety hazards.

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The balanced equation for the reaction is as follows:

3 AI2O3 (s) + 3C (s) + 2CI2 (g) → 3AICI3 (s) + 3CO (g)

Combination reactions happen when two or more reactants come together to create a single product. In this instance, the reactants are chlorine gas, carbon, and aluminium oxide (AI2O3) (CI2). Aluminum chloride (AICI3) and carbon monoxide make up the final product (CO). Exothermic means that energy is released when the reactants come together in this reaction. Both heat and light are manifestations of this energy. The bonds between the atoms in the reactants are broken and new bonds between the atoms in the product are formed when the reactants combine. The reaction is exothermic because of the energy released during this process.

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Esterification is a chemical reaction between an alcohol and a carboxylic acid that results in the formation of an ester and a molecule of water.

Esterification  is an important class of organic reactions and is widely used in the synthesis of flavors, fragrances, and plastics. In this report, we will explore the fundamental principles and practical applications of esterification.

The experimental procedure involves the reaction between methanol and acetic acid to form methyl acetate and water. The reaction was carried out in a round-bottom flask equipped with a condenser and a thermometer. The reactants were mixed in stoichiometric amounts, and a small amount of sulfuric acid was added as a catalyst. The flask was heated using a hot plate and maintained at a constant temperature of 60°C.

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Answer:

b.) Br and Br

Explanation:

A covalent bond occurs when electrons are shared between two atoms causing them to form a bond.

A "pure" covalent bond refers to a nonpolar covalent bond. In these bonds, the electrons are shared equally between two atoms as a result of the absence of an (or very small) electronegativity difference. The purest covalent bond would therefore be between two atoms of the same electronegativity. Two bromines (Br) have the same electronegativity, thus making it the purest covalent bond.

Polar covalent bonds occur when electrons are shared unequally between two atoms. There is a larger electronegativity difference between the two atoms, but not large enough to classify the bonds as ionic. In this case, a.) and c.) are polar covalent bonds and d.) is an ionic bond.

Answer:

it's A. if the force of gravity is greater than the buoyant force, the object will sink.

Explanation:

just took the quiz on a p e x

The volume (in mL) of the 0.167 M sodium hydroxide, NaOH solution needed is 26.9 mL

The balanced equation for the reaction is given below:

HClO₄ + NaOH —> NaClO₄ + H₂O

The volume of NaOH can be obtained as follow:

MaVa / MbVb = nA / nB

(0.242 × 18.53) / (0.167 × Vb) = 1

4.48426 / (0.167 × Vb) = 1

Cross multiply

0.167 × Vb = 4.48426

Divide both side by 0.167

Vb = 4.48426 / 0.167

Vb = 26.9 mL

Thus, the volume of the NaOH solution needed is 26.9 mL

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Answer:

See below

Explanation:

Conversion factor :  1 ft^3  = 28 .317  liters

$ 1.30 /( 17 ft^3 *  28.317 liters/ft^3)    =   $.0027  per liter  

Answer and explanation:

The nuclides with the same atomic number, but different mass numbers are isotopes.

So, in this case, each species will have the same atomic number and a different mass number, that will be the same that it is written in the name of the element:

The calculated formula masses to 133.5 amu, we find that the substance with a formula mass closest to 133.5 amu is (d) AlCl3. Therefore, the answer is option D.

To identify the substance with a formula mass of 133.5 amu, we need to calculate the formula mass of each given substance and compare it to 133.5 amu.

(a) MgCl2:

The formula mass of MgCl2 can be calculated by adding the atomic masses of magnesium (Mg) and chlorine (Cl).

Mg: atomic mass = 24.31 amu

Cl: atomic mass = 35.45 amu

Formula mass of MgCl2 = (24.31 amu) + 2(35.45 amu) = 95.21 amu

(b) SCl:

The formula mass of SCl can be calculated by adding the atomic masses of sulfur (S) and chlorine (Cl).

S: atomic mass = 32.07 amu

Cl: atomic mass = 35.45 amu

Formula mass of SCl = 32.07 amu + 35.45 amu = 67.52 amu

(c) BCl:

The formula mass of BCl can be calculated by adding the atomic mass of boron (B) and chlorine (Cl).

B: atomic mass = 10.81 amu

Cl: atomic mass = 35.45 amu

Formula mass of BCl = 10.81 amu + 35.45 amu = 46.26 amu

(d) AlCl3:

The formula mass of AlCl3 can be calculated by adding the atomic mass of aluminum (Al) and 3 times the atomic mass of chlorine (Cl).

Al: atomic mass = 26.98 amu

Cl: atomic mass = 35.45 amu

Formula mass of AlCl3 = 26.98 amu + 3(35.45 amu) = 133.78 amu. Option D

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Chromatography is a laboratory technique used to separate and analyze mixtures of molecules based on their physical and chemical properties, such as their size, charge, and polarity. The technique involves passing a mixture of molecules through a stationary phase, such as a column or a thin layer of material, which separates the molecules based on their interactions with the stationary phase.

TLC stands for Thin Layer Chromatography, which is a specific type of chromatography that uses a thin layer of material, such as silica gel or alumina, as the stationary phase.

Retention factor (Rf) is a measure of how far a molecule travels through the stationary phase relative to the distance traveled by the solvent front. Rf is calculated by dividing the distance traveled by the compound by the distance traveled by the solvent front.

Two factors that can affect retention factor values are the polarity of the stationary phase and the polarity of the mobile phase. The polarity of the stationary phase affects how strongly the molecules in the mixture interact with the stationary phase, while the polarity of the mobile phase affects how easily the molecules can move through the stationary phase.

In conclusion,  equation that can be used for the calculation of Rf is:

Rf = distance traveled by compound / distance traveled by solvent front

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Answer:

1. bond in the molecule on the right

Explanation:

CH3CH2-OH

The compound above is an alcohol due to the presence of the OH bond. The wave number of the C - O bond is given as; 1050-1150 cm^-1.

CH3CH__O

The compound above is an aldehyde due to the presence of the CHO bond. The wave number of the C = O  bond is given as; 1740-1720 cm^-1

Comparing both bonds, the C = O bond absorbs at a higher wave number.

The option that cannot be caused by warming arctic climates is D. decreased disease prevalence.

Several factors contribute to the warming of arctic climates. One of the primary factors is the increase in greenhouse gases, such as carbon dioxide, methane, and nitrous oxide, in the atmosphere due to human activities like burning fossil fuels, deforestation, and industrial processes.

The greenhouse effect is a natural process in Earth's atmosphere that helps keep the planet warm and habitable. It is called the greenhouse effect because it works similarly to a greenhouse, where glass walls trap heat inside and keep the air inside warmer than outside.

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Krypton, Chromium, and Oxygen with the following symbols Kr-13, Cr-2, and O-15 respectively have 23 electrons.

The atomic number of an atom determines the number of electrons it has. When the number of protons is equivalent to the number of electrons, the atom is electrically neutral. An anion, on the other hand, is an atom with a negative charge. It has gained an electron or two, or even more. Below are the chemical symbols for three different atoms or atomic anions with 23 electrons.Krypton:Kr has an atomic number of 36, indicating that it has 36 electrons. However, if we add 13 electrons to it, the total number of electrons becomes 49. Krypton with 13 additional electrons becomes Kr-13, with a total of 49 electrons.Chromium:Cr has an atomic number of 24, indicating that it has 24 electrons. Adding two more electrons to it, the total number of electrons becomes 26. The atomic anion with 26 electrons is Cr-2.Oxygen:Oxygen has an atomic number of 8, indicating that it has 8 electrons. However, if we add 15 electrons to it, the total number of electrons becomes 23. Oxygen with 15 additional electrons becomes O-15, with a total of 23 electrons.

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The observation of a smaller outside hole than inside leads Becca to infer that an impact from the outside caused the hole, with a larger object striking and passing through the window from the inside.

From the observation that the hole in the window is smaller on the outside than on the inside, Becca, as a forensic technician, might deduce the following:

The hole was caused by an impact from the outside: The smaller outside hole suggests that the force that created the hole originated from the outside and exerted more pressure on the window surface facing inward.

The object causing the hole was larger on the inside: The discrepancy in hole sizes implies that the object that struck the window had a larger size or diameter on the inside, and as it penetrated the glass, it compressed or fragmented the glass, resulting in a larger hole on the inside.

The object may have passed through the window: The difference in hole sizes indicates that the object may have penetrated the window, potentially passing through to the inside. This could suggest a break-in or an incident involving the window being struck from the outside.

Overall, the observation of a smaller outside hole than inside leads Becca to infer that an impact from the outside caused the hole, with a larger object striking and passing through the window from the inside.

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Answer: Ammonia (NH3)

Explanation: The other choices include: Vinegar which is Acetic Acid; HCl or Hydrochloric Acid; and HNO3 or Nitric Acid, so by a process of elimination, Ammonia is the only likely answer. A more thorough explanation: ammonia abides by the Brønsted–Lowry definition of a base: wherein it is any compound that can accept a proton from another molecule. It just so happens that, given Ammonia (NH3) in water, Ammonia will accept a proton in the form of H+ from water and form Ammonium (NH4) and Hydroxide ions (OH).

Helen takes 35 nights to knit a total of 175 centimeters of scarf. Hence, she will take 36 nights to knit 180 centimeters of scarf.

Length is a basic measurement in for an object which is basically taken in meters or centimeters. The basic unit of length in American standard is meters (m) and in CGS system it is centimeters.

It is given that, Helen knit a total of 175 centimeters of a scarf over 35 nights. Then, the length she knit in one nigh is calculated as:

175/35 = 5 cm.

Therefore, the number of nights required to complete 180 cm is :

180 /5 = 36

Thus, she will take 36 nights to knit a total of 180 cm of scarf.

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Answer:

6.573

Explanation:

2.7500 x 1cal/4.184kj x 1Cal/1000cal = 6.573

Answer:

Peptide Bonds

Explanation:

Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.

Based on the given measurements for the length, width, and height of the box;

The height of the box is determined from the data provided as follows:

length, l = 2.2 in

width, w = 3.5 in

height, h = 10.4 in + 1 in

The height of the box = 10.4 + 1 in

Hence, the height of the box = 11.4 in

The volume of the box is calculated as a product of the length, width, and height of the box as determined from the measurements taken.

The volume of the box, V = l × w × h

where;

l is length = 2.20 in

w is the width = 2.91 in

h is the height = 11.4 in

The volume of the box, V = 2.20 * 2.91 * 11.4

The volume of the box, V = 73.0 in³

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Complete question:

Suppose you are trying to find the volume of a box based on the following measurements for the length, width, and height of the box, where the height was measured in two parts.

length, l = 2.2 in

width, w = 3.5 in

height, h = 10.4 in + 1 in

a. Calculate the height (h) of the box first keeping all digits, then rounding to the proper number of significant figures.

b. Calculate the volume (V) of the box using V = l × w × h. Round to the proper number of significant figures.

Answer:

18m/s

Explanation:

Given parameters;

Initial velocity  = 10m/s

Acceleration  = 2m/s²

Time = 4s

Unknown:

Car's new velocity  = ?

Solution:

We use one of the kinematics equation to solve this problem:

          v  = u + at

v  = new velocity

u = initial velocity

a = acceleration

t = time

      v = 10 + (2 x 4)  = 18m/s