A solution contains 0.35 mol of isopropanol (C₃H₇OH) dissolvedin 0.85 mol of water. (a) What is the mole fraction of isopropanol?

The concentrations in mol/dm³ would be 0.002, 0.04, 0.007, and 0.01 respectively.

Since  1 dm³ of blood is taken as containing  1 dm³ of water, it means that the concentration levels are in mg/dm³.

Thus, we are tasked with the job of converting from mg/dm³ to mol/dm³.

Recall that: mole = mass in grams/molar mass in gram/mole

Molar mass of ethanol = 46.07 g/mol

80 mg of ethanol = 0.08 g = 0.08/46.07 = 0.002 mol

200 mg of ethanol = 0.2 g - 0.2/46.07 = 0.004 mol

300 mg = 0.3 g = 0.3/46.07 = 0.007 mol

500 mg = 0.5 g = 0.5/46.07 = 0.01 mol

Therefore, the respective concentrations in mol/dm³ would be 0.002, 0.04, 0.007, and 0.01 respectively.

More on concentrations can be found here: https://brainly.com/question/13872928

#SPJ1

The complete chemical equation for cellular respiration is:

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + Energy

In this equation, glucose (C₆H₁₂O₆) is combined with oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O). The process of cellular respiration occurs in the mitochondria of cells and involves the breakdown of glucose to release energy in the form of ATP (adenosine triphosphate).

During cellular respiration, glucose is oxidized to form carbon dioxide, and oxygen is reduced to form water. This process releases energy that is stored in ATP molecules and is used by cells to carry out various metabolic activities.

Overall, cellular respiration is a vital process in organisms to generate energy for cellular functions and is essential for the survival and functioning of living organisms.

To know more about the cellular respiration refer here :

https://brainly.com/question/13721588#

#SPJ11

Answer:

8

Explanation:

Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus

Answer:

D.

Explanation:

To convert from grams of a substance to moles of a substance, you use molar mass as a conversion factor. Sodium's molar mass is 22.99 grams per mole. To cancel out grams, you need to place grams on the bottom and moles on the top.

Answer:

The answer is Observation.

For you to observe the things around you then you need to use all your sense organs....

Answer: making an observation.

Answer:

2Al+3F2→2AlF3

Explanation:

There are no parameters that are being changed, just moved around.

It is the charterer's duty to hire a ship for a certain period of time to transport cargo or passengers.

The charterer's job is to hire a ship for a set amount of time to transport goods or people. They are in charge of negotiating the charter conditions with the vessel owner or broker, setting up the required licences and paperwork, and ensuring the timely and safe delivery of cargo or passengers. Broker: The broker's job is to make it easier for the charterer and the vessel owner to come to an agreement. They serve as middlemen, using their connections and market expertise to identify suitable vessels and agree upon conditions of charter that are acceptable to both sides. A appropriate vessel must be provided by the vessel owner in order to satisfy the charterer's needs. They keep the vessel seaworthy, adhere to pertinent laws, and guarantee effective operations throughout the charter.

To know more about charter, here:

https://brainly.com/question/27998149

#SPJ4

Answer:

3F2+P2_>2PF3now f is 6 on both sides and your p is also 2 on both sides

The ideal gas equation can be used to determine the molar mass of the substance with the help of the moles. The molar mass of the gas having a mass of 0.458 grams is 9.15g/mol.

Ideal gas law gave the relation between the moles, pressure, temperature, volume, and the gas constant. The moles of the ideal hypothetical gas can be used to calculate the molar mass.

An ideal gas equation is given as:

PV =nRT

Given,

Mass = 0.458 gm

Pressure (P) = 0.98 atm

Volume (V) = 1.2 L

Temperature (T) = 287 K

Gas constant (R) = 0.0821

Substituting values in ideal gas as:

0.98 × 1.2 = n × 0.0821 × 287

n = 1.18 ÷ 23.56

n = 0.05moles

Now, moles are used to calculate molar mass as:

molar mass = mass ÷ moles

= 0.458 ÷ 0.05

= 9.15g/mol

Therefore, 9.15g/mol is the molar mass of the unknown gas.

Learn more about ideal gas, here:

https://brainly.com/question/27946792

#SPJ4

Answer:

the transfer through empty space can be radiation

Explanation:

because when it transfers it turns into radiation

The type of reaction involved in stations 12, 13, and 14 varies. The initial appearance, type of change, observation, and clue of these experiments are noted.

Station #12:

Initial Appearance: The initial appearance of hydrogen peroxide (H₂O₂) is liquid and manganese (IV) oxide (MnO₂) is a blackish or brown solid.

Observations: During the experiment, hydrogen peroxide reacts with manganese (IV) oxide and decomposes to a "magical genie" that shows up as oxygen and water vapor.

Type of Change: It is a type of chemical change

Clue: formation of gas (bubbles form)

Station #13:

Initial Appearances: The solution looks colorless.

Observations: Iodate(V) ions, hydrogensulfate(IV) ions, mercury(II) ions, and starch are involved in this reaction, which results in a precipitate of mercury(II) iodide that turns orange after a short period of time. A little while later, the liquid abruptly becomes blue-black as the starch-iodine complex forms.

Type of Change: It is a type of chemical change where the color change from orange to black.

Clue: unexpected color change

Station #14:

Initial Appearances: The liquid is colorless.

Observations: When we combine baking soda and vinegar, it produces sodium acetate or hot ice. When you pour it, it immediately crystallizes, enabling you to build a tower of crystals. This crystallization is an exothermic process.

Type of Change: This type of reaction is a physical change where heat is generated.

Clue: formation of ice or solid.

To know more about sodium acetate crystallization:

https://brainly.com/question/8064057

#SPJ4

Answer:

contain equal numbers of particles. ... MELTING POINT is the temperature at which a solid turns into liquid. ... Determine the energy required (in Joules) when the temperature of 3.21 grams of water increases by 4.0 °C ... Solve for at mater RW 100. ... How much heat energy is released when 12.8 g of barium oxide react with

Explanation:

The concentration of A decreases and then levels out. Option A

In many chemical reactions, a reactant is consumed as the reaction progresses, leading to a decrease in its concentration over time. The reactant molecules are transformed into products, and as the reaction proceeds, the concentration of the reactant gradually diminishes.

At equilibrium, the concentrations of both reactants and products remain relatively constant over time, although they can coexist.

Learn more abaout reactant:https://brainly.com/question/30129541

#SPJ1

Answer:

B. 4.76 atm

Explanation:

\(P_1\) = Initial pressure = 3.8 atm

\(T_1\) = Initial temperature = \(25+273.15\ \text{K}\)

\(P_2\) = Final pressure

\(T_2\) = Final temperature = \(100+273.15\ \text{K}\)

From Gay Lussac's law we have

\(\dfrac{P_2}{P_1}=\dfrac{T_2}{T_1}\\\Rightarrow P_2=P_1\dfrac{T_2}{T_1}\\\Rightarrow P_2=3.8\times\dfrac{100+273.15}{25+273.15}\\\Rightarrow P_2=4.76\ \text{atm}\)

The pressure inside the can would be \(4.76\ \text{atm}\).

Answer:

B.  Na

Explanation:

To identify an atom, you simply need to look at the number of protons.  This atom has 11 protons.  On the periodic table, you can see that the element with 11 protons is sodium (Na).

Answer:

C4H8O4

Explanation:

Let (CH20)x

C=1*12.01=12.01     (12.01, 1.01, 16.00 Avg mass of elements)

H=2*1.01=2.01

O=1*16.00=16.00

12.01 + 2.01 + 16.00 = 30.03

120.12/30,03=4

==> (CH2O)4 = C4H8O4

The molecular formula of the molecule that has an empirical formula of \(CH_2O\) is equal to \(C_4H_8O_4\).

Given the following data:

Scientific data:

To determine the molecular formula of the molecule that has an empirical formula of \(CH_2O\):

First of all, we would find the molar mass of \(CH_2O\):

\(CH_2O =12 +(1\times2)+16\\\\CH_2O =30\;g/mol\)

For molecular formula:

\((CH_2O)n = 120.12\\\\30n = 120.12\\\\n=\frac{120.12}{30}\)

n = 4.0

\((CH_2O)_4 = C_4H_8O_4\)

Read more: https://brainly.com/question/21280037

These changes in urine output and specific gravity influential the effects of different factors on the body's fluid balance and urinary system.

In this lab, we can expect to see different changes in urine output for each of the protocols.

In the first protocol, where water intake is increased, we would expect to see an increase in urine flow. This is because the body will need to excrete the excess water to maintain proper fluid balance. As a result, the specific gravity of the urine will decrease, indicating a more diluted urine.

In the second protocol, where water intake is restricted, we would expect to see a decrease in urine flow. This is because the body will need to conserve water to maintain proper fluid balance. As a result, the specific gravity of the urine will increase, indicating a more concentrated urine.

In the third protocol, where diuretics are used, we would expect to see an increase in urine flow. Diuretics promote the production of urine by inhibiting the reabsorption of water in the kidneys. As a result, the specific gravity of the urine will decrease, indicating a more diluted urine.

In the fourth protocol, where antidiuretics are used, we would expect to see a decrease in urine flow. Antidiuretics promote the reabsorption of water in the kidneys, reducing the production of urine. As a result, the specific gravity of the urine will increase, indicating a more concentrated urine.

These changes in urine output and specific gravity will help us understand the effects of different factors on the body's fluid balance and urinary system.

Learn more about urine: brainly.com/question/21951089

#SPJ11

fluorine, F2, chlorine, Cl2, bromine, Br2, or iodine, I2

The number of hydrogens bonded to each labeled carbon in the given substance is given below:

In the given substance, Carbon labeled as A has 2 Hydrogen atoms attached to it, Carbon labeled as B has 2 Hydrogen atoms attached to it, Carbon labeled as C has 3 Hydrogen atoms attached to it, Carbon labeled as D has 1 Hydrogen atom attached to it, Carbon labeled as E has 3 Hydrogen atoms attached to it and Carbon labeled as F has 2 . The molecular formula of the given substance is CH3CH2CH(CH3)CH2CH3. The given substance is as shown below: In the given substance, Carbon labeled as A has 2 Hydrogen atoms attached to it, Carbon labeled as B has 2 Hydrogen atoms attached to it, Carbon labeled as C has 3 Hydrogen atoms attached to it, Carbon labeled as D has 1 Hydrogen atom attached to it, Carbon labeled as E has 3 Hydrogen atoms attached to it and Carbon labeled as F has 2 Hydrogen atoms attached to it. Hence, the number of hydrogens bonded to each labeled carbon in the given substance has been calculated and the molecular formula of the given substance is CH3CH2CH(CH3)CH2CH3.

Learn more about the Molecular formula:

https://brainly.com/question/15960587

#SPJ11

Answer:

M = 1.26

Explanation:

Molarity = mole of solution/liters of solution
435mL/1000 = .435L
Plugging in the numbers into the formula, we get:
Molarity = .550 mol/.435L = 1.26 M

Answer:

17

Explanation:

mass number = # of protons + # of neutrons

No, the color chrome green is not produced by the same type of electronic transition that causes the color of chrome yellow.

The color chrome green is produced by the presence of chromium(III) ions in a complex, such as chromium(III) oxide hydroxide. The green color arises from the absorption of specific wavelengths of light by the chromium(III) ions, which are in a particular electronic configuration. The absorption of light in this case is due to the d-d transition, which involves the excitation of an electron from one d orbital to another within the chromium(III) ion.

On the other hand, the color of chrome yellow, also known as lead(II) chromate, is a result of a different type of electronic transition. Chrome yellow exhibits a yellow color due to the presence of lead(II) chromate ions, which absorb specific wavelengths of light. In this case, the absorption of light is attributed to the charge transfer transition between the lead(II) and chromate ions.

The colors chrome green and chrome yellow are produced by different types of electronic transitions. Chrome green involves d-d transitions within chromium(III) ions, while chrome yellow involves charge transfer transitions between lead(II) and chromate ions.

Learn more about electronic transition here: brainly.com/question/29221248

#SPJ11

Answer:

photosynthesis

Explanation:

Answer:its part of the process of photosynthesis

Explanation:

Answer:

Radiation

Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas. Radiation is the transfer of thermal energy through thermal emission.

Answer:

Reaction between an oxygen and  a phosphorus will produce oxides of phosphorus.

Explanation:

Reaction between oxygen and phosphorus produces four atoms of phosphorus with five atoms of oxygen. Sometimes it produces two atoms of phosphorus and five atoms of oxygen and sometimes four atoms of phosphorus and six atoms of oxygen. It does so depending upon the availability of oxygen. The size of phosphorus atom  interferes with the ability to form a double bonds to the other elements, such as nitrogen, oxygen, etc.

Answer:

Mass number is 24 and the element is sodium (Na)

Answer:

22 g of CO2 are obtained from decomposition of 50 g of CaCO3

Explanation:

Answer:

142.218

Explanation:

The ideal gas law is PV=nRT

P= pressure in kpa

V= volume

n= number of moles

R= always equals 8.31

T= temperature in kelvins

P= (1.25)(101.3)= 126.625kPa

V= 14L

n= 1.50 mol

R= 8.31

T= ?

Multiply (126.625)(14) then divide that by (1.5)(8.31) to get your temperature in kelvins

The new molarity of the solution is 0.5M.

The molarity of a solution can be calculated by using the following expression:

C1V1 = C2V2

Where;

According to this question, a chemist dilutes 2.0 L of a 1.5 M solution with water until the final volume is 6.0 L.

1.5 × 2 = 6 × C2

3 = 6C2

C2 = 3/6 = 0.5M

Therefore, the new molarity of the solution is 0.5M.

Learn more about molarity at: https://brainly.com/question/12127540