Ethanol, an organic compound, has the following structural formula.
H
H
H-C-C-0-H
I
1
H H
What is the chemical formula for ethanol?
O CHO
O
C₂H5O
C₂H5O2
O C₂H6O

Answer:

S

Explanation:

Using periodic table (see those little numbers in the upper right?  Those are electron 'shells' .... look at the bottom one)

Ca has 2     Cl has 7       Ne has 8        S  has 6 in the outermost shell

5 mols of O_2 need 4 mol NH_3

Now

Moles of Ammonia

Moles of NO=0.3mol

Mass of NO

So

Moles of Oxygen

Remaining moles

Mass

Yield

⇒ 0.018

-use pH=-log[H3O+]

-solve for H3O+

Using the given formula, the density of the material is 2.015 g/mL

From the question, we are to determine the density of the material

From the given formula

Density = Mass / Volume

And from the given information,

Mass = 65.5 g

and volume = 32.5 mL

Putting the parameters into the equation,

Density = 65.5/32.5

Density = 2.015 g/mL

Hence, the density of the material is 2.015 g/mL.

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Organelles are the components of the cells with various functions and roles. The correct blanks are chloroplast, cell wall and vacuole, vacuoles, and mitochondria.

The organelles are the cell components that have well-defined structures and functions to perform the designated task in the cell activity. Chloroplast is the organelle that converts solar energy into chemical energy through photosynthesis.

The cell wall and the vacuoles provide the structural framework and shape of the cell. The vacuoles also store food pigments in the cell. The mitochondria of the cell convert the food source into energy like ATP.

Therefore, the correct blanks are chloroplast, cell wall and vacuole, vacuoles, and mitochondria.

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O tissues containing nerve cells for taste

Answer:

57)a)increase

b)increase

c)pressure

58)

Answer:

Ashley, Ron, and Lindsay

Explanation:

Ultrasound technology is used for medical purposes by a scanning machine that allows to obtain living images of the inside of the body. For the type of issues they are going trough, ultrasound technology would help patients Ashley, Ron, and Lindsay. Ashley's under-developing fetus, Ron's kidney stones and, Lindsay's uterus cancer can be monitored by using ultrasound technology.

The ultrasound technology is a medical tool which can help a physician to evaluate, diagnose and treat medical conditions. Here the patients  with Ron, and Lindsay kidney stones and cancer can be detected by ultrasound technology. The correct option is D.

A term for the disease in which the abnormal cells divide without control and can invade nearby tissues is defined as cancer. The cancer cells can also spread to the other parts of the body through the blood and lymph systems.

Kidney stones are the hard deposits made of minerals and salts which form inside our kidneys. It is mainly caused due to little drinking of water, obesity, eating food with high salt or sugar content.

The ultrasound technology can detect cysts, tumors, obstructions or infections within or around your kidneys. It is also used by the medical professionals for many purposes including the pregnancy related problems.

Thus the correct option is D.

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Answer:

methylhexane.

Explanation:

Because thats the answer.

Mark the oxidation nos

Then

Gain of electron is reduction

Copper is reduced .

Option D

Answer:

57.4 g

Explanation:

30.4 g Al will produce 57.4 g Al 2 O 3 30.4 g O 2 will produce 64.6 g Al

2 O 3 .The limiting reagent is aluminum, and the maximum amount of aluminum oxide that can be produced in this reaction is 57.4 g

The partial pressure of the hydrogen gas, if the water vapor pressure is 3.17kPa is 91.83 kPa.

Dalton's law of gas states that total pressure of the mixture of gas is equal to the sun of the partial pressure of the individual gas.

Given that,

Total pressure of hydrogen gas = 95 kPa

Partial pressure of water vapor = 3.17 kPa

Partial pressure of hydrogen gas will be calculated as:
Partial pressure = 95 - 3.17 = 91.83 kPa

Hence required partial pressure is 91.83 kPa.

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Answer:

.451 mole

Explanation:

PV = n RT     R = gas constany = .082057 L-Atm/K-mol      T is in units Kelvin

5 *2.32 = n (.082057)(40+273.15)

n=.451 mole

Answer:

A. O, S, Se

Explanation:

They are all considered "other nonmetals," found in row 16 of the periodic table, and are chalcogens. The other options don't have as much in common.

Answer:

Anhydrous copper sulphate.

Explanation:

In the presence of water anhydrous copper sulphate , a white powder, turns to blue.

Done!

Answer:

744.0 mL

Explanation:

Formula obtained from Charles Law :

⇒ [tex]\frac{V_{1} }{T_{1} } = \frac{V_{2} }{T_{2} }[/tex]

===============================================================

Given :

⇒ V₁ = 780.0 mL

⇒ T₁ = 30 °C = 303 K

⇒ T₂ = 16 °C = 289 K

=============================================================

Solving :

⇒ V₂ = 780 × 289 / 303

⇒ V₂ = 225420 / 303

⇒ V₂ = 744.0 mL (approximately)

Answer:

47

Explanation:

Find solubility

So half amount of solute is dissolved .

Hence the solution is saturated

Answer:

the car is slowing down l think so

Answer:

B-The reaction is endothermic because energy is absorbed during the

reaction

Explanation:

CaCO3 -> CaO + CO2

endothermic means cooling

its decomposition of limestone to calcium oxide (quicklime) and carbon dioxide on heating

byjus

Answer:

CoBr2

Explanation:

Hope it helps you :))))

have a good day

The decay rate of the radioisotope on the previous morning at 10 am is 38.7 million decays per second.

The initial mass of the radioisotope is calculated as follows;

N = N₀(¹/₂)^t/h

where;

24 M/s = N₀(¹/₂)^(22/32)

24 M/s = N₀(0.62)

N₀ = (24 M/s)/(0.62)

N₀ = 38.7 M/s

Thus, the decay rate of the radioisotope on the previous morning at 10 am is 38.7 million decays per second.

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The observation in the illustration remains in accordance with the law of conservation of mass assuming that moisture is present in the container.

The law state that mass can neither be created nor destroyed. However, mass can be converted from one form to another.

In this case, the ion was placed in a container of pure oxygen. Assuming that moisture is present, iron reacts with oxygen to form rust according to the following equation:

[tex]4Fe + 3O_2 + 6H_2O --- > 4Fe(OH)_3[/tex]

The rust formed will weigh more than the initial weight of the iron.

Without the presence of moisture, one can effectively conclude that the observation violates the law of conservation of mass.

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Answer: 19 grams

Explanation:

percent by mass = (mass of part)/(mass of whole) * 100

this means that in this question, 12 = x/160 * 100, where x is the amount of NaCl.

this means 12/100 = x/160, and thus x = (160)(12/100)=19.2 grams

The closest option is B.

Answer:

Second Option: 19 grams

Explanation:

Total solution weight: 160 grams

percent of NaCl in the solution: 12%

You take these two numbers and multiply them with 12 being over 100:

160 * [tex]\frac{12}{100}[/tex] = 19.2 grams

and then just round to the nearest whole number: 19 grams

Answer:

E. O, S, Se, Te

Look up atomic size charts, go to row 6