HELPPPPP
what is the percent yield if the theoretical yield is 73g and the actual yield is 62g?

Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

Answer:

1-water 2-Sun 3-Gravity

The molecules in a copper penny is closely packed and and has no space to move apart thus the material will be denser than that in the molten state. That's why the penny sink in the molten copper.

Copper is a transition metal exhibiting all the metallic properties. The molten state of metals is the fluid state where the molecule are not strongly held by the metallic bonds.

Molten material is made by melting them and the liquid like state contains molecules with some space to move apart. Whereas, in solid state as in a copper penny, the molecules are closely packed and have no space to move apart.

An object will sink in a liquid if it is less dense than the liquid. Copper penny is denser than the molten copper because the molecules are densely packed and it will sink on to it.

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Answer:

c. inorganic

Explanation:

inorganic has t do with non living things or things that have no carbon in them

Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.

To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

5000 mL = 5000/1000 = 5 L

Now, we can rearrange the formula to solve for moles of solute:

moles of solute = Molarity (M) x volume of solution (L)

moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol

Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:

mass of solute = moles of solute x molar mass of solute

mass of glucose = 1.075 mol x 180.16 g/mol

mass of glucose = 194.0 g (rounded to three significant figures)

Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.

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Answer:

H2SO4(acid), NaOH(base)

Explanation:

Answer:

NH4OH

Explanation:

NH4OH is a weak base because it partially dissociates into NH + and OH− ions in aqueous solutions and the amount of OH− ions produced is low.

When a chocolate bar is solid, it is able to smell it.  It is also important to note that a substance 's molecules cannot be in two distinct phases at the a time.

In general, it is not possible for a the molecules of the chocolate  to be in two distinct phases at the same time.

It must be noted that smelling a solid, such as a chocolate bar, however, mean  the release  of loose molecules from the solid,   which may then move   through the air and   reach our olfactory receptors in our nose, allowing us to sense the fragrance.

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Answer:

One mole of ideal gas occupies 22.4L volume at STP

Explanation:

So., we treat carbon dioxide an ideal gas:

3 mol x 22.4L •Mol-¹ ≈? ?L

Reactant: C3H8 + O2 = Product:  CO2 + H2O

Reactant: Zn + HCI =  Product: ZnCl₂

Reactant: KI + Pb(NO3)2 = Product: KNO3 and PbI2

Reactant: Mg(CIO3)2 = Product: MgCl2 and O2

Reactant: F2 + KBr = Product: KF and Br2

Chemical reactions entail the conversion of one or more substances into novel species, thanks to the breaking and forging of chemical bonds.

Essentially, such transformations involve the reconfiguration of atoms and/or molecules, culminating in distinct chemical and physical attributes contrasting from those of the initial materials.

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Answer:

38.8125

Explanation:

4.5 x 5.750 x 1.50 = 38.8125

Answer:

Kf = 0.389.

Explanation:

Hello there!

In this case, it turns out possible for us to solve this problem by firstly writing the equilibrium chemical equation and equilibrium expression for the formation of this complex:

\(B+C\rightleftharpoons BC\\\\Kf=\frac{[BC]}{[B][C]}\)

Thus, we firstly calculate the concentrations at equilibrium, knowing that the reaction extent in this case is 0.00500mol (same as the formed moles of BC):

\([B]=[C]=\frac{0.0350L*1.00mol/L-0.00500mol}{0.0700L} =0.429M\)

\([BC]=\frac{0.00500mol}{0.0700L} =0.0714M\)

And finally, the equilibrium constant:

\(Kf=\frac{0.0714}{[0.429][0.429]}\\\\Kf=0.389\)

Regards!

Answer:

0.535 g

Explanation:

The reaction that takes place is:

First we calculate how many AgNO₃ moles are there in 25.0 mL of a 0.366 M solution, using the definition of molarity:

Converting 25.0 mL to L ⇒ 25.0 / 1000 = 0.025 L

Then we convert AgNO₃ moles into NaCl moles:

Finally we convert NaCl moles into grams, using its molar mass:

Answer:

21

Explanation:

........................

Answer: 21

Explanation:

Answer:

well 6.3 times 10 is 63 and 6.7 times 10 is 67

Explanation:

Answer:

If it is elemental gas, the oxidation number is $$0$$.

Explanation:

The oxidation number of an atom in a chemical bond, is the charge left on the atom

Answer

655.61 grams of mercury (II) phosphite.

Explanation

Given:

Volume, V = 699.9 mL = 0.6999 L

Molarity = 1.233e+00 M

What to find:

The grams of mercury (II) phosphite needed to make 699.9mL of a 1.233e+00 M solution.

Step-by-step solution:

Step 1: Calculate the number of moles of mercury (II) phosphite in 699.9mL of a 1.233e+00 M solution.

The moles can be known using the molarity formula:

Step 2: Convert the moles of mercury (II) phosphite needed to 699.9mL of a 1.233e+00 M solution to mass in grams.

Using the atomic masses of (Hg = 200.59, P = 30.97, O =15.999) from the periodic table.

The molar mass of mercury (II) phosphite (Hg3(PO3)2) = (3 x 200.59) + 2(30.97 + (3 x 15.999)) = 601.77 + 157.934 = 759.704 g/mol

Therefore, the mass of mercury (II) phosphite needed to 699.9mL of a 1.233e+00 M solution to mass in grams is:

Thus 655.61 grams of mercury (II) phosphite are needed to 699.9mL of a 1.233e+00 M solution.

Answer:

Explanation:We known that Earths energy machine is driven by sunlight which acts as fuel for this machine and to strike a balance between outgoing long wave radiation and short wave radiation there are many factors which are involved in this process.Sun emits this energy in the form of short wave radiation because of the huge energy it has and short wave radiation are higher in energy.Hence, they reach the earth surface mostly as visible and UV rays.After reaching the earths surface what happens with these rays is that they get absorbed by the clouds and other constituents of Earth.

Now, this energy needs to be emitted back in to space in order to balance out the energy budget of earth and that is why this energy is emitted back as long wave radiation which have less energy and also earth has less energy unlike the sun.Loss of this energy is essential as Earth looses most of its energy through this and results in cooling.But when this OLR decreases it should be a cause of concern for us.

This imbalance is caused by a wide range of different human induced activities which has a cumulative effect on the temperature of earth.These activities gives rise to a huge gain in the CO2 concentration which is why this word has gain so much popularity and a cause of widespread concern for us.At community level we contribute to this heating by increasing usage of personal automobiles rather than going for public transport , advancement in technology has greatly changed our lifestyles making it more simpler and easier but this demands more energy consumption.Landscape changes are one of the most important because its taking place at a faster rate.Most of the land being cleared off to built new houses which means clearing off the existing vegetation which leads to temperature rise.Setting up of Industry depending on its type can reduce the amount of OLR escaping the surface by introducing more amount of GHGs in to the atmosphere.

Its these small communities which add up to become the entire human population causing a massive damage and hence at community level if people realize and take necessary steps things will start to change.

The percent ionization of an acidic solution can be calculated from the H+ concentration. the percent ionization of the monoprotic acid of 0.141 M is 18.23 %.

Percent ionization of an acidic solution is the percent of H+ ions in the solution. Thus, mathematically, it is the ratio of H+ ion concentration to the concentration of solution multiplied by 100.

Let HA be the monoprotic acid when it ionizes, forming equal concentration of H+ and A- let it be x. Thus ionization  constant can be written as follows:

Ka = [x]² /[HA]

0.00469 =[x]²/[0.141 M]

   [X] = 0.025. = [H+]

Percentage ionization  = (0.025 M / 0.141 M)× 100

                                      = 18.23 %

Therefore percentage ionization of the acid is 18.23%.

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Answer:

thermal; coolant

Explanation:

A refrigerator transfers thermal energy from the cool air inside the refrigerator to the warm air in the kitchen. I hope this helps! ^-^

Answer:

Gallium, Germanium, Arsenic, Selenium, Bromine and Krypton

Explanation:

Based on periodic trends, the atom that has a larger ionization energy than calcium are Gallium, Germanium, Arsenic, Selenium, Bromine and Krypton.

Across the period, the ionization energy increases from left to right.

Answer:

B.

Explanation:

Can you give me brainliest? i need to rank up

Answer:

2nd One is correct

Answer:

here are what i have so far, im doing this right now

Explanation:

Plate Tectonics Lab Report

Instructions: In the Plate Tectonic lab you will investigate the interactions between continental and oceanic plates at convergent, divergent, and transform boundaries around the globe. Record your observations in the lab report below. Y

Objective(s):  

To look at interactions between continental and oceanic plates, etc.  

Hypothesis:

In this section, please include the if/then statements you developed during your lab activity for each location on the map. These statements reflect your predicted outcomes for the experiment.

Location One: Select three events that you predict will be observed. If I explore two continental plates at a convergent boundary, then I will observe:

• earthquakes  

• mountains

• volcanoes

Location Two: Select three events that you predict will be observed. If explore two continental plates at a divergent boundary, then I will observe:  

• ocean formation  

• volcanoes

• seafloor spreading

you will submit your completed report

ps; you might want to change up the objective.

A geological event is a brief, spatially diverse, dynamic and ongoing occurrence in the history of the Earth.

A geological event is a brief, spatially diverse, dynamic (diachronous), and ongoing occurrence in the history of the Earth that aids in the modification of the Earth system and the production of geological strata. The concept of event stratigraphy initially came up as a way to identify, analyse, and correlate how significant physical and biological events have affected the overall stratigraphical record.

Israel's Dead Sea basin Holocene sediments contain seismic activity. This can be considered a record of a geological event, an earthquake, that altered the strata. Geological events can occur over timescales of order of magnitude, from just a few seconds through millions of years, as well as on a variety of spatial scales, from the local to the globe.

1. Volcanoes and minor earthquakes

2. Volcanoes, earthquakes and fold mountains.

3. Earthquakes and fold mountains.

4. Magma from volcanoes is filled with nutrients that makes land fertile.

Therefore, a geological event is a brief, spatially diverse, dynamic and ongoing occurrence in the history of the Earth.

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Answer:

The maximum number of valence electrons is 8

Explanation:

element 3 has 3 valence electrons. 7 has 5, and 10 has 8, as we increased the number of electrons in element 11, the number of valence electrons became 3, and the pattern went on, it cannot exceed 8.

The electron configuration of an atom depicts the arrangement of electrons scattered throughout the orbital shells and subshells.

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Answer:

At RTP (room temperature and pressure), one mole of any ideal gas occupies a volume of 24.45 dm³. Therefore, we can use the following steps to calculate the number of molecules of nitrogen dioxide in 3 dm³ at RTP:

Calculate the number of moles of nitrogen dioxide in 3 dm³ using the ideal gas law:

PV = nRT

Where:

P = pressure = 1 atm (at standard pressure)

V = volume = 3 dm³

n = number of moles (unknown)

R = gas constant = 0.0821 L atm/(mol K)

T = temperature = 298 K (at standard temperature)

n = PV/RT

n = (1 atm)(3 dm³)/(0.0821 L atm/(mol K) x 298 K)

n = 0.122 mol

Calculate the number of molecules of nitrogen dioxide in 0.122 mol using Avogadro's number:

1 mol of any substance contains 6.022 x 10^23 molecules (Avogadro's number)

Therefore, the number of molecules in 0.122 mol of nitrogen dioxide is:

6.022 x 10^23 molecules/mol x 0.122 mol = 7.35 x 10^22 molecules

Therefore, there are 7.35 x 10^22 molecules of nitrogen dioxide in 3 dm³ at RTP.

Explanation:

Answer:

copper

Explanation:

First, write down the reaction and notice the ratio of moles of which the reactants react.

the equation (i'm too lazy to write states of matter and since it doesnt matter in this problem i'm not going to. it is balanced, however) is:
Cl2 + Cu -> CuCl2

as you can see, one mole of chlorine gas reacts with one mole of copper.

since we have 75 moles of copper but only 70 moles of chlorine gas, after everything has been reacted we would expect 5 moles of copper to be left over. so, copper is the the reactant which is in excess