URGENT PLEASEEEE
QUESTION 47 In the small intestine, chylomicrons are picked up by lacteals; simple sugars and amino acids directly enter the blood. O True False QUESTION 48 Cytosol is intracellular fluid; most extrac

Answer:

I think it is C

Explanation:

We have that the reaction and a decrease in the concentration of the reactants will favor the reverse reaction that is the decomposition of the yellow iodine trichloride and the formation of green chlorine gas and brown iodine chloride

Given that some green chlorine gas, which is part of the reactant, will be removed, the reverse reaction will be favored and initial concentration of the yellow iodine trichloride and the green chlorine gas will be reduced while the proportional concentration of the brown iodine chloride will increase and the mixture will become more brown.

Answer:

d because you don't like math or any subject

INFORMATION:

We have:

- 66 grams of NaCl

- 255 grams of water

If the NaCl is dissolved into the water, we must find the mass percent

STEP BY STEP EXPLANATION:

To find the mass percent we must must use the next formula

In our case,

- the solute is NaCl

- the solution would be the sum of masses from NaCl and water

Then,

- mass of solute = 66 g

- mass of solution = 66 g + 255 g = 321 g

Finally, replacing in the formula,

ANSWER:

The mass percent when 66 grams of NaCl is dissolved in 255 grams of water is 20.60%

Answer: Alex should get 300 Calories from carbohydrates, which is about 33 grams. This snack is almost 70% of her total grams of carbohydrates per day.

Answer:

B

Explanation:

I think

Answer:

Hg(NO3)2 + Na2CO3 --> 2NaNO3 + HgCO3

The correct option is (B) No, the solution is too dilute and would have a %T over 90% where Beer's Law does not apply.

The solution is too dilute, it will have lower than desired concentration of the desired substance. To make solution more concentrated, more of the desired substance must be added to the solution. This increases the concentration of the desired substance, allowing it to be more effective in the intended application.

The amount of the desired substance must be adjusted according to the desired concentration of the solution. In addition, the amount of other substances in the solution must be considered to ensure the desired concentration is not too high or too low. Too high concentration could produce an undesired reaction, while too low a concentration would decrease the efficiency of the desired reaction.

Full question:

A set of dilutions ranging in concentration from 1x10-2 M to 2x10-2 M are used to prepare a standard curve. Transmittances of the dilutions range from 12% to 88%. Could this plot be used to determine the concentration of a sample that had a concentration of 1.0x10-3 M?

A) No, the solution is too dilute and would have a %T under 10% where Beer's Law does not apply.

B) No, the solution is too dilute and would have a %T over 90% where Beer's Law does not apply.

C) Yes, simply extend the standard curve.

D) No, the solution is too concentrated and would have a %T over 90% where Beer's Law does not apply.

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3.6 ×10²⁴ atoms fluorine are in 410 g of UF\(_6\). Fluorine is an atomic number 9 chemical element with both the symbol F.

Fluorine is an atomic number 9 chemical element with both the symbol F. This is the smallest halogen as well as occurs as a very poisonous, pale yellow diatomic vapor under normal circumstances.

It is exceptionally reactive being the most electronegative active catalyst, reacting with all other elements save the light inert.

mole =  410 / 352.02 =1.16mole

number of atom= 1.16× 6.022×10²³=6.98×10²³

number of atom of fluorine =6× 6.98×10²³= 3.6   ×10²⁴ atoms

Therefore, 3.6 ×10²⁴ atoms fluorine are in 410 g of UF\(_6\).

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Answer: The solvent in an icy glass of lemonade is water.

The solvent in an icy glass of lemonade is water. Water is the most abundant liquid in the world, and is essential to life as we know it. In an icy glass of lemonade, the water serves to dissolve the other ingredients and carry their flavors and aromas.

The other ingredients in lemonade usually consist of lemon juice, sugar, and sometimes ice. The lemon juice provides the tartness, the sugar adds sweetness, and the ice provides a cooling sensation. Together, these ingredients create a refreshing summertime beverage.

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The oxidation number of S in H2SO is +0.

The oxidation number of O in H2SO is -2.

The oxidation number of H in H2SO is +1

According to the quantum mechanical model of the atom, an orbital represents a position where an electron probably is. So, the correct option is (a).

An atomic orbital is a function that describes the position and wave-like activity of an electron in an atom in terms of both atomic theory and quantum mechanics. This function can be used to determine the likelihood of discovering any atom electron in any particular area surrounding the nucleus.

The physical area or space where the electron may be calculated to be present, as predicted by the specific mathematical shape of the orbital, is sometimes referred to as an atomic orbital. Simple names for orbitals with angular momentum quantum numbers l = 0, 1, 2, and 3 are the s orbital, p orbital, d orbital, and f orbital.

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To find the standard cell potential of a Cr/Fe voltaic cell, you subtract the standard reduction potential of Fe from the standard reduction potential of Cr.

The given reduction half-reactions are:

Cr³⁺(aq) + 3e⁻ → Cr(s) E° = -0.74 V

Fe²⁺(aq) + 2e⁻ → Fe(s) E° = -0.44 V

In a voltaic cell, the reduction half-reaction with the more positive reduction potential occurs at the cathode (site of reduction), while the half-reaction with the less positive reduction potential occurs at the anode (site of oxidation).

To determine the standard cell potential, we subtract the reduction potential of the anode (Fe) from the reduction potential of the cathode (Cr):

E°cell = E°cathode - E°anode

= (-0.74 V) - (-0.44 V)

= -0.30 V

Therefore, the standard cell potential for the Cr/Fe voltaic cell is -0.30 V.

The negative sign indicates that the cell reaction is spontaneous in the reverse direction, from Fe to Cr.

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Answer: c. ceabd

Explanation: Substances that are more dense move to the bottom of the beaker. Substances that are less dense float to the top.

To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, the given figure represents the atom.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.

The circles that are in center represents nucleus. The two bigger circles represents orbitals. The cross sign represents electrons. The outermost bigger circle represents the valence shell and the electron in this shell represents the valence electron.

Therefore, the given figure represents the atom.

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Answer: 220 g

Explanation:

To find the answer to this problem, all you need to do is multiply the number of moles by the molar mass of the molecule.

In this problem, you multiply 44 (the molar mass of CO2) by 5 (the grams of CO2 given) to get 220.

Answer:

220 g

Explanation:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles CO2, or 44.0095 grams.

518.5 atm pressure of hydrogen is needed to maintain a \(H_2\) concentration of 0.42 m

The given Henry's law constant for \(H_2\) is 8.1 × 10^-4 M atm^-1 at 25°C. To find the pressure of hydrogen needed to maintain a \(H_2\) concentration of 0.42 M, we can use Henry's law.

The equation for Henry's law is:

C = kH*P

where C is the concentration of gas in moles per liter, P is the partial pressure of the gas in atmospheres, and kH is Henry's law constant in M/atm.

Plugging the values in Henry's law equation, we get:

0.42 = (8.1 × 10^-4)P

Dividing both sides by (8.1 × 10^-4), we get:

P = (0.42)/(8.1 × 10^-4)

P = 518.5 atm

Hence, the pressure of hydrogen needed to maintain a \(H_2\) concentration of 0.42 M is 518.5 atm.

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The little circle subscripts at the top of the deltag, deltah, and deltas represent standard conditions. These conditions correspond to the standard atmospheric pressure, temperature, and humidity respectively.

The standard atmospheric pressure is the average atmospheric pressure at mean sea level, which is 1.01325 bar. The standard temperature is 20°C (68°F), and the standard humidity is 0.00% relative humidity.

Atmospheric pressure is measured in bar and is the amount of force per unit area exerted by the atmosphere on a surface. It is affected by factors such as the weather and altitude. Temperature is a measure of the kinetic energy of the particles in a substance and is measured in degrees Celsius (°C). Humidity is the amount of moisture in the air and is measured in relative humidity (%), which is the ratio of the partial pressure of water vapor in the air to the saturated vapor pressure at a given temperature.

In chemistry and thermodynamics, the values of deltag, deltah, and deltas are often used to calculate the enthalpy, Gibbs free energy, and entropy changes associated with a chemical reaction. The standard conditions for these subscripts are the most common values used when calculating the thermodynamic properties of a reaction. Knowing the standard conditions is important for predicting the thermodynamic behavior of a system.

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Explanations:

(i) Moles for K

mass = 89.3% = 89.3g

Mol. mass K =39.0983g/mol

∴ n = mass/molmass

=89.3/39.0988

=2.28 moles

(ii) Moles for N

mass = 10.7% = 10.7 g

Mol. mass N =14.0067g/mol

∴ n = mass/molmass

=10.7g/ 14.0067g/mol

=0.76 moles

• K= 2.28 /0.76 = 2.9898240669737 ≈ 3

• N=0.76/0.76 = 1

Answer:

The answer is 1/3 of the population.

To classify each species as a Lewis acid or a Lewis base, we need to understand the definitions of these terms.

A Lewis acid is a species that can accept an electron pair, while a Lewis base is a species that can donate an electron pair. Now, let's use this information for the sorting process.

Step 1: Identify the species you want to classify. (You have not provided any specific species, so I will provide a general guideline)

Step 2: Determine if the species can accept an electron pair (Lewis acid) or donate an electron pair (Lewis base). This is usually based on their electron configuration and the presence of vacant or lone electron pairs.

Step 3: Once you've determined whether the species is a Lewis acid or a Lewis base, you can sort them accordingly.

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Answer:

it is called a substrate

Explanation:

hopfully this helps u

Answer:

The reactant in an enzyme-catalyzed reaction is called a substrate

Answer:

D

Explanation:

Without gravity, any object wont go to the ground, and without a magnetic field, a compass cant be used for navigation.

The pH scale ranges from 0 to 14, with values below 7 considered acidic, 7 being neutral, and values above 7 being alkaline. Hair and scalp have a slightly acidic pH, and using a pH-balanced shampoo helps maintain the natural balance.

The characteristic that identifies a pH-balanced shampoo is having a pH level close to the natural pH level of the hair and scalp, which is around 4.5 to 5.5. Therefore, a pH-balanced shampoo will have a pH level in the acidic to neutral range, typically between 4.5 and 5.5, to avoid causing damage or disrupting the natural pH balance of the hair and scalp.

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A pH-balanced shampoo should have a pH between 4.5 and 5.5, contain mild acids or bases, and help to keep the hair and scalp's natural pH level balanced.

A pH-balanced shampoo is important because it prevents the scalp from becoming too dry or too oily. It ensures that the hair cuticle is closed, reducing frizz and improving shine. Using a pH-balanced shampoo can also help maintain the effectiveness of other hair products.

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The paths that planets follow around the sun are called as orbit, and they are shaped like an ellipse.

The orbits of the planets around the sun are elliptical. Kepler, an astronomer, provided a clear definition of these orbits. The three rules he created are referred to as Kepler's laws of planetary motion. It says that every planet does an orbit around the sun.

The plane of Earth's orbit around the sun serves as the definition of the ecliptic. The primary planets of our solar system, their moons, some asteroids, and their orbits all roughly follow this plane.

An orbit is a curved path taken by an object, such as a planet's path around a star, a natural satellite's path around a planet, or a man-made satellite's path around a planet, moon, or asteroid.

Thus, the paths that planets follow around the sun are called as orbit.

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The pressure of 10.0 g of Ar gas in a 750 mL container at a temperature of 50°C is 5.56 atm.

The ideal gas law is given as:

PV = nRT

whereP is the pressure of the gas

V is the volume of the gas

n is the number of moles of the gas

R is the gas constant

T is the temperature of the gas.

Here, we are given the mass of the gas, the volume of the container and the temperature of the gas. We can use this information to determine the pressure of the gas.

Using the Ideal gas law

PV = nRT

Rearranging, we get:

P = nRT / VA

t standard temperature and pressure (STP),

1 mole of gas occupies 22.4 L and has a mass of 44 g (approx.)

The molar mass of Ar is 40 g/mol.

Using the above information, we can determine the number of moles of Ar present in the container.10.0 g Ar / 40 g/mol = 0.25 moles Ar750 ml = 0.75 LAr

Using the ideal gas law,

P = nRT / VP = 0.25 moles Ar x 0.082 L atm/mol K x (50 + 273.15) K / 0.75 LP = 5.56 atm

Therefore, the pressure of 10.0 g of Ar gas in a 750 mL container at a temperature of 50°C is 5.56 atm.

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Answer:

1.82

Explanation:

pH is given by the equation

Answer:

A not

B yes

C yes

D yes

Explanation:

A 2C 6H but 10O and 7O so no

B 3C 6O 2Fe on each side  so yes

C 4H 1S 6O 2Na so yes

D 2Ag 2Cl 1Ca 2N 6O so yes

Answer:

True

Explanation:

Birds are characterized by the presence of certain physical features that are unique to the group and serve to distinguish birds from other animal groups. These features, such as feathers, a beak instead of teeth, a lightweight skeleton, and the ability to fly, are considered the defining characteristics of birds. These defining characteristics serve as the basis for classifying birds as a distinct group and are used by scientists to identify and study different bird species.

Answer:

A)Protons and electrons

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

when an atom lose or gain the electron ions are formed and number of protons and electrons no longer remain the same.

For example:

An atom of sodium when lose one electron it form positive ion. The number of electrons became 10 and number of protons remain 11.

Na → Na⁺ + 1e⁻

The combustion of methane, CH4, releases 890.4 kJ/mol. That is, when one mole of methane is burned, 890.4 kJ are given off to the surroundings. This means that the products have 890.4 kJ less than the reactants.

Combustion of one mole or 16 g of methane gas releases 810 kJ of heat energy. Thus, heat released by the combustion of 22.4 g of methane is 1134 kJ.

Combustion of a substance is its reaction with atmospheric oxygen producing carbon dioxide and water. Combustion of hydrocarbons gases takes places easily and can be burned easily for fuels.

The chemical equation of combustion of methane is written below:

\(\rm CH_{4} + 2O_{2} \rightarrow CO_{2} + 2H_{2}O\)

This is an exothermic process and heat is released from the reaction system.

The heat released by the combustion of one mole of methane is 810 kJ.

molar mass of methane = 16 g/mol

no.of moles in 22.4 g = 22.4/16 = 1.4 g

Thus, heat released by 1.4 moles = 1.4 ×810 kJ =1134 kJ.

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Answer:

c

Explanation:

In science, there is always processing of an item or sample to get an end product. So if the diamond is mined; there is a processing stage used to come out with the final product as Diamond through carbon in the heating process