A grignard synthesis begins with 6.00 g of bromobenzene and ends with 3.94 g benzoic acid. what is the percent yield of the benzoic acid? assume all other reagents are in excess.

Answer:

0.01134kg

Explanation:

You divide by 1000 to get the kg

The correct option is (a) 1,000,000ºK.

The temperature of the Sun's corona is most nearly equal to option (a) 1,000,000ºK. The corona is the outermost layer of the Sun's atmosphere and is composed of highly ionized gas. The temperature of the corona is much higher than the temperature of the Sun's visible surface (the photosphere), which has a temperature of about 5,500 ºC (or 5,800 ºK). The reason for the high temperature of the corona is still not fully understood, but it is thought to be related to the Sun's magnetic field and the transfer of energy from the Sun's interior to its outer atmosphere.

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Answer:

speed= distance/time

= 100/5=20mph

Answer  usually expressed In the units of the last Qrder of the value of the ... one, two or three significant figures, we find the value of the root in the tn ... The numbers in the table can be regarded as the right-hand ... 1.63 5.1039 0.1959.

Explanation: I hope this helps <3

Temperature stays the same during state of matter change. After plotting the graph of temperature vs time and the curve is outlined, the moment the graph plateaus read the temperature that is constant(repeatedly occurs).

From the points given in the table of value, am sure the melting point is 78°C.

All the best!

Answer:

valence electrons

Explanation:

valence electrons

Answer:

2x - 9y = 23

5x - 3y = -12x - 9y = 23

5x - 3y = -1

Explanation:

Energy is inversely proportional to the wavelength of a wave. Which would have the GREATEST energy. A wave with a wavelength of  5  meters.

The relationship between wavelength and energy is given as :

E = hf

E = h c / λ

where,

E = energy

h = Planck constant

c = speed of light

λ = wavelength

So, energy is inversely proportional to wavelength,  therefore, the wave having least amount of wavelength will have greatest amount of energy. So, according to the given value . the wavelength 5 m will have greatest energy.

Thus, Energy is inversely proportional to the wavelength of a wave. Which would have the GREATEST energy. A wave with a wavelength of  5  meters.

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Answer:

false

Explanation:

they dont spontaneoulsy form water

Explanation:

beacuse they can be separeted by evaporation

A solution of salt water is a form of the mixture since salt can be

Answer:

Option B: cooling as the lava runs down the mountain

Explanation:

The point R is basically at near the Earth's surface.

Now, we are told that rocks melt underground to form magma. This is a process of formation of igneous rocks. So, in formation of igneous rocks another process that will contribute to formation of rocks at point R is named cooling.

Cooling is a process where the larva runs down the mountain that makes magma hardened and makes it it turn into igneous rock.

Answer:

The answer is cooling as the lava runs down the mountain.

Explanation:

I took the test on Edge 2020 and got the answer right.

When inserting thermometers or glass tubes into rubber stoppers or rubber tubing, it is important to follow certain rules to ensure proper use and avoid damage to the equipment. First, it is important to choose the right size rubber stopper or tubing to fit the thermometer or glass tube.

Secondly, when inserting the thermometer or glass tube, it is important to use a twisting motion rather than forcing it straight in. This helps prevent any damage to the thermometer or glass tube as well as the rubber stopper or tubing. Additionally, it is important to ensure that the thermometer or glass tube is inserted to the correct depth in the rubber stopper or tubing to ensure proper use and accuracy of the readings.  The stopper or tubing should fit snugly but not be too tight as to cause damage to the thermometer or glass tube.

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Answer: 16 g/mol

Explanation: Molarity is Moles/Liters or Mol/L

(0.50 mol/L)(1.30L) = 0.65mol

(cancels out L)

Molar mass is g/mol so...

10.5g/0.65mol = 16.1 g/mol

Rounded to 2 sig figs is 16 g/mol

Answer:

Due to cis trans isomerism

Explanation:

Answer:

d

Explanation:

Using the idea of the  molar volume of butane gas, we have 2.23 moles of water vapor.

The term reaction equation shows the conversion of reactants to products. First of all, we must get down the reaction equation as follows;

C4H10(g) + 13/2O2(g) ----> 4CO2 (g) + 5H2O(g)

From the balanced reaction equation;

1 mole of  butane gas yields 5 moles of water vapor. Since 1 mole of butane gas occupies 22.4 L. Hence;

22.4 L of butane yields 5 moles of water vapor

10 L of butane gas yields 10 L * 5 moles/22.4 L = 2.23 moles

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Answer: (0.800g BaCl2) / (208.233g BaCl2/mol) =

0.00384 mol BaCl2

Explanation: Hope this helps :)

The number of moles of anhydrous barium chloride is equal to 3.84 ×10⁻³ mol and the number of moles of water is equal to 7.78 ×10⁻³ mol.

A mole can be described as a standard unit that is used to determine the number of atoms, molecules, ions, or other particular particles in the given mass of the substance. The mass of one mole of any chemical element is known as atomic mass and that of any chemical compound is called the molar mass of that compound.

Given the chemical reaction of decomposition of barium chloride:

\(BaCl_2.2H_2O\longrightarrow BaCl_2 +2H_2O\)

Given the mass of the hydrated barium chloride = 0.940 g

The mass of the anhydrous  barium chloride = 0.800 g

The molar mass of the anhydrous barium chloride = 208.23 g/mol

The number of moles (n) of anhydrous barium chloride = 0.800/208.23

n = 3.84 ×10⁻³ mol

The mass of the water = Mass of hydrated barium chloride - anhydrous barium chloride

Mass of water = 0.940 -0.800 = 0.14 g

The number of moles of water = 0.14/18 = 7.78 ×10⁻³ mol

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The inlet pressure of the pipeline in (bar) is 6.7 bar. To calculate the inlet pressure of the pipeline, we can use the Darcy-Weisbach equation.

Darcy-Weisbach equation relates pressure drop, flow rate, pipe characteristics, and fluid properties. The equation is given as:

ΔP = (fLρV²) / (2D) where:

ΔP is the pressure drop

f is the Darcy friction factor

L is the length of the pipeline

ρ is the density of water

V is the velocity of water

D is the diameter of the pipeline

First, we need to convert the flow rate from m³/hr to m³/s:

Flow rate = 27 m³/hr = (27/3600) m³/s = 0.0075 m³/s

Next, we need to calculate the velocity of water:

Area of the pipeline =\(\pi \times \frac {(76/1000)^2}{4} = 0.004556 m^2\)

Velocity
= Flow rate / Area of the pipeline
= 0.0075 m³/s / 0.004556 m² = 1.646 m/s

Now, we can calculate the pressure drop using the Darcy-Weisbach equation. Since we need to calculate the inlet pressure, we assume ΔP is the difference between the outlet pressure and the inlet pressure:

ΔP = (fLρV²) / (2D)

\(\triangle P = \frac {(0.015 \times 4000 \times 1000 \times 1.646^2)}{(2 \times 0.076)} = 10.69 \times 10^5 Pa\)

= 10.7 bar (approx)

Rearranging the equation to solve for the inlet pressure:

Inlet pressure = ΔP - outlet pressure = 10.7 bar - 4 bar = 6.7 bar

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All of the following are qualitative tests that are often used to identify unknown ionic compounds except titration.

Qualitative tests are conducted to determine the presence or absence of certain ions or compounds in a sample based on their characteristic reactions. Common qualitative tests include flame tests, precipitation reactions, color changes, and gas evolution tests.

Titration, on the other hand, is a quantitative technique used to determine the concentration of a specific substance in a solution by reacting it with a standardized solution of another substance. It is not typically used as a qualitative test for identifying unknown ionic compounds.

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The feature that is NOT a part of Thompson's 'Raisin Pudding' model of the atom is a), the presence of a nucleus.

In this model, the electrons are dispersed throughout the atom (b), held in place by the positive charges in the atom (c) and the positive charge is also dispersed in a cloud about the atom (d). However, this model does not take into account the presence of a nucleus, which was later discovered by Rutherford. The nucleus is a central, positively charged region in the atom that contains most of the atom's mass.

It was discovered through the gold foil experiment where alpha particles were shot at a thin sheet of gold foil and it was observed that some particles were deflected. This led to the conclusion that the positively charged alpha particles were repelled by a dense, positively charged region in the atom which was later identified as the nucleus. Hence, Thompson's model does not include the presence of a nucleus which is a key feature of modern atomic theory.

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Answer:

1???

Explanation:

The mass of NaNO3 would be needed to make a saturated solution in 200 mL of water at 80°C is 296g.

A solubility curve is the line drawn on a graph to depict the relationship between temperature and a substance's solubility at various temperatures. Where the solution is saturated is shown by the lines on the solubility curve. Anywhere below the lines, there is still room for more solute to dissolve because the solution is not saturated.

Solubility of NaNO3 in water at 80°C is 148g/100mL.

The quantity of water at 80°C = 200 mL

Therefore, the weight of NaNO3 = 148g/100mL x 200mL

                                                         => 296g

A saturated solution is one that has as much solute in it as can be dissolved under the circumstances in which it is present. Seawater, Epsom bath salts, carbonated beverages, and powdered beverages are a few examples of saturated solutions.

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Glyphosate was initially thought to have no effect on human health because it primarily targets enzymes found only in plants and bacteria, not humans.

Additionally, the compound was believed to have a low toxicity level and was considered to be safe when used according to the labeled instructions.

However, recent scientific studies have suggested potential health risks associated with glyphosate exposure, including links to cancer and other health issues.

These studies have prompted further investigation and controversy surrounding the safety of glyphosate in herbicides.

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1. B, the energy associated with the motion of an object

2. C, 12.4 g/mL

3. C, 5

1) B) Kinetic energy is energy associated with the motion of an object.

2) B) Density equals mass divided by volume: 1.38 g/mL

3) C) There are 5 significant figures in 20.300

4) A) 80 is the atomic number for mercury on the periodic table.

5) E) The formula for copper (II) sulfate pentahydrate is CuSO4•5H2O

So in summary:

• Kinetic energy is the energy of a moving object due to its motion.

• Density is calculated by dividing an object's mass by its volume.

• Significant figures refer to the known precision of a measurement based on the digits reported.

• Atomic symbols represent elements on the periodic table.

• Chemical formulas use symbols of the elements to show the proportions of atoms in a compound.

Answer:

See explanation

Explanation:

Electro negativity refers to the ability of an atom in a molecule to attract the shared pair of electrons of a bond closer to itself.

In a molecule, the polarity of bonds is determined by the relative electro negativity of the bonding atoms. If the difference in electro negativity between the atoms in a bond is significant, such a bond is polar in nature e.g H-Cl, H-Br, C-F, etc.

However, the occurrence of polar bonds in a molecule alone does not guarantee the polarity of the molecule. The polarity of a molecule also depends on the shape of the molecule since dipole moment is a vector quantity.

A molecule is polar when the resultant dipole moment which is determined by the shape of the molecule is non zero.

For instance, CO2 contains two polar C-O bonds but the molecule is non polar because the two dipole moments cancel out. Also, symmetrical molecules are nonpolar irrespective of the presence of polar bonds in the molecule.