Help! The products of a chemical equation are CO2 and 2H20. Which set of atoms
must make up the equation's reactants so that the equation models the law
of conservation of mass?
A. 2 C,3 O, and 4 Hg
B. 2 C,2 O, and 3 H
C. 1 Ca, 4 O, and 4 H
D. 1 C, 4 O and 4 H

Answer:

It is false.

Explanation:

Weathering is the general process by which rocks are broken down at Earth's surface. Erosion is a set of processes that loosen and move soil and rock downhill or downwind. Umm...for example, imagine you are having ice cream in your hand out on a sunny day, if the ice-cream melts and falls down, it is called erosion and if the ice-cream melts but it doesn't fall down, it called weathering.

The observation of a large amount of fizzing taking place when HCI is added to solid NaHCO3 is consistent with the type of change listed for Part D in Table 11. is a. Yes.

The fizzing is an indication of a chemical reaction taking place. In Table 11, Part D is listed as a chemical change, which is consistent with the observation of fizzing. Therefore, the correct answer is a. Yes.

It is important to note that chemical changes are often accompanied by observable changes, such as the production of gas (fizzing), changes in color, or the production of heat. These observable changes can be used to determine whether a chemical change has taken place. In this case, the fizzing observed when HCI is added to solid NaHCO3 is a clear indication of a chemical change taking place, which is consistent with the type of change listed for Part D in Table 11.

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The atomic mass of M is 95.94 g/mol, and M is Barium (Ba) regarding a 1.42 g sample of a pure compound, with formula m2so4.

The balanced chemical equation for the reaction between M2SO4 and CaCl2 is:

From the equation, we can see that 1 mole of M2SO4 reacts with 1 mole of CaSO4, so the number of moles of M2SO4 in the original sample is equal to the number of moles of CaSO4 precipitated:

The molar mass of M2SO4 can be calculated using the mass of the sample and the number of moles:

Since the formula for M2SO4 contains two M atoms, the atomic mass of M is half of the molar mass of M2SO4:

Looking at the periodic table, the only element with an atomic mass close to 71 g/mol is Barium (Ba). Therefore, M is Barium (Ba).

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When varying the hydroxide ion concentration, it is recommended to use a concentration of 0.1 M for the CV.

This is because a low concentration of CV helps to reduce the effect of the hydroxide ions and maintain a more consistent pH throughout the experiment. Additionally, a low concentration of CV also reduces the amount of time required for the experiment. With the help of spectroscopy and graphical analysis, the rate law for the color-fading reaction between crystal violet and sodium hydroxide will be ascertained in this advanced inquiry lab exercise. The lab starts off with a tutorial on how to build a calibration curve for the absorbance vs concentration of the dye crystal violet. A stock solution of crystal violet is used to create a series of known or standard solutions, and the absorbance of each is measured at the ideal wavelength. In a rate law experiment, the concentration of any "unknown" dye solution can be calculated using a Beer's law plot of absorbance as a function of concentration.

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To prepare the solution, we should add 3.33ul of each dntp to 86.68ul of water.

You may calculate how many units of water you've used over the past reading of your metre by subtracting it from the current value. Multiply the units by your current water rate to get the quantity of water you consume in dollars.

Each dntp is present in a 75mm concentration in the current solution, which is 30 times more than the targeted 2.5mm concentration. Hence, to get a final concentration of 2.5 mm, we must 30 times dilution the current solution.

The following formula can be used to accomplish this:

C1V1 = C2V2

where C1 denotes the starting point, V1 the starting point, C2 the ending point, and V2 the ending volume.

Let's assume that each dntp needs to be added to the solution in x microliters. Then:

75mm x microliters = 2.5mm x 100ul

microliters = (2.5mm x 100ul) / 75mm

microliters = 3.33ul

Hence, 3.33ul of each dntp must be added to the solution.

By adding the volumes of the four dntps together and then adding water to create a final volume of 100 ul, we can determine the total volume of the solution:

Total volume = 3.33ul x 4 + water

Total volume = 13.32ul + water

So, we need to add 86.68ul of water to make a total volume of 100ul.

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Answer:

4.70 grams of NH4Cl is needed to prepare 350 mL of a 0.25 M ammonium chloride solution.

We need approximately 4.68 grams of NH4Cl to prepare a 0.25 M ammonium chloride solution with a volume of 350 mL.

To determine the mass of NH4Cl needed to prepare the solution, we us use the formula:

m=M x V x MM ... (i)

where,

m= mass in grams

M=molarity of solution

MM= molar mass of compound

V= volume in litres

The number of moles of NH4Cl needed can be calculated using:

  Moles = Molarity x Volume ...(ii)

  Moles = 0.25 mol/L x 0.350 L

  Moles = 0.0875 mol

Hence we can replace M x V with number of moles in equation i.

The molar mass of NH4Cl is :

  Molar mass of NH4Cl = (1 x 14.01 g/mol) + (4 x 1.01 g/mol) + (1 x 35.45 g/mol)

  Molar mass of NH4Cl = 53.49 g/mol

We have all the variables

Putting them in equation i.

Hence,

  Mass (g) = Moles x Molar mass

  Mass (g) = 0.0875 mol x 53.49 g/mol

  Mass (g) = 4.68 g

Therefore, you would need approximately 4.68 grams of NH4Cl to prepare a 0.25 M ammonium chloride solution with a volume of 350 mL.

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Acetic acid will neutralize the addition of a strong base in an acetic acid/acetate buffer system.

In an acetic acid/acetate buffer system, the main purpose is to resist changes in pH when small amounts of acid or base are added. When a strong base is added, it increases the concentration of hydroxide ions (OH-) in the solution, which can shift the pH towards the basic side.

To neutralize the added strong base and maintain the buffer system, acetic acid (CH3COOH) acts as the main keyword. Acetic acid, being a weak acid, can react with the hydroxide ions (OH-) to form water (H2O) and acetate ions (CH3COO-). This reaction helps in counteracting the increase in hydroxide ions, thereby stabilizing the pH of the buffer system.

Water (H2O), acetate ions (CH3COO-), and hydronium ions (H3O+) are already present in the buffer system and do not actively neutralize the strong base. It is the addition of acetic acid that replenishes the buffer's acid component and maintains its pH buffering capacity.

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Answer:

ionic bonding or covalent

Explanation:

Answer:

Explanation:

Explanation:

If you treat it as an ideal gas, then  

P

V

=

n

R

T

where P is pressure, V is volume, n is number of moles, R is the gas constant and T is temperature in K.

If you assume pressure is constant, and we know that the amount of substance will remain constant, and of course the gas constant is a constant, then  

V

varies directly with  

T

. So for the two temperatures you can say:

V

1

.

T

1

=

V

2

.

T

2

V

2

=

V

1

.

T

1

T

2

T

2

, the higher of the two temperatures, will be 273 K and  

T

1

will be 20 degrees lower, so 253 K.

Now plug in the numbers:

V

2

=

3

.

253

273

=

2.78

litres.

Answer:

A. The reduction part of the reaction occurs at the anode

Answer:

A

Explanation:

Answer:

I think it is A

Explanation:

A.They study how to make plants produce certain chemicals

The melting point and the normal boiling point of water in respective temperatures in kelvins are 273 and 373. The correct option is 5.

The boiling point is the point of water when the water vapor of the water is equal to the water vapor of the atmosphere.

The melting point is the point when a solid-state converts into liquid, and changes its physical state.

In Celsius, the boiling point is 100⁰C

In Kelvin, 273 + 100 = 373 K

The melting point is ice is 0⁰C

273 + 0 = 273 K

Thus, the correct option is 5. 273 and 373.

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Answer:

258 pounds = 117027 grams.

Explanation:

1 pound is equal to 453.592 grams. Multiply 258 by 453.592 and you would get 117026.736, you would then round up the tenth place. or where the 7 is. This would get you 117027.

Because the elements in the same group have comparable chemical characteristics, you would think of an element from the same vertical column.

This is further explained below.

Generally, A tabular representation of the many elements that make up matter, the periodic table is sometimes referred to as the periodic table of the elements.

Because of its widespread use across a variety of scientific fields, including chemistry, physics, and other fields, it is often regarded as an emblem of the chemical sciences.

In conclusion, Given the fact that the elements exists in the same group and have like chemical features, its best you consider elements found in same vertical period table column.

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A 30-day supply of Levoxyl at a dosage of one 13 μg tablet per day contains 0.39 mg of Levoxyl.

For a patient taking one 13 μg tablet of Levoxyl per day, the total amount of levothyroxine they are receiving is 13 micrograms. To calculate the total amount in a 30-day supply, we simply multiply this amount by 30.

13 μg/tablet x 1 tablet/day x 30 days = 390 μg

Note that the microgram (μg) is a unit of mass equal to one millionth of a gram, while the milligram (mg) is a unit of mass equal to one thousandth of a gram. To convert μg to mg, we divide by 1000:

390 μg / 1000 = 0.39 mg

Levoxyl is a medication used to treat hypothyroidism, a condition where the thyroid gland doesn't produce enough hormones to regulate the body's metabolism. The active ingredient in Levoxyl is levothyroxine sodium, which is a synthetic form of the hormone thyroxine (T4).

Levoxyl tablets are available in several strengths, ranging from 25 mcg to 300 mcg. The recommended dosage depends on the patient's age, weight, and the severity of their hypothyroidism. In general, adults with normal thyroid function usually require about 1.6 mcg of levothyroxine per kilogram of body weight per day.

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Answer:

WHY DO YOU NEED HELP HUH

DON'T CHEAT READ AND STUDY

Explanation:

Answer:

It's C

Explanation:

When we do the respective division operation we get the following result 0.171802.

When we do the respective division operation we get the following result 0.171802. But we must adjust the significant figures taking into account the number that has less significant figures, which is 5.68.

5.68 has three significant figures. So we will adjust the significant figures of the result to three.

0.97584 / 5.8 = 0.1718 = 0.172

The rate of consumption of O (g) if water vapor is consumed at a rate of 1.60 x 10⁻¹⁰ M/s is 8.0 * 10⁻⁹ M/s.

The rate of a chemical reaction is known as the reaction rate or rate of reaction. It is proportional to the rise in product concentration per unit of time and the fall in reactant concentration per unit of time.

Considering the given equation:

The equation of the reaction is: O (g) + H₂O (g) ---> 2 •OH (g)

The rate of the consumption of water vapor will be twice the rate of consumption of O (g).

Water vapor is consumed at a rate of 1.60 x 10⁻¹⁰ M/s.

Hence, O (g) will be consumed at a rate of 0.5 * 1.60 x 10⁻¹⁰ M/s = 8.0 * 10⁻⁹ M/s.

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County: cell

State: Tissue

Country: Organ

Continent: Organ system

World: organism

(smallest to largest)

The concentration of sulfate ion would be required for Ca⁺ to begin to precipitate out as calcium sulfate is 7.10 * 10⁻⁴ M.

b) The concentration of the Ba²⁺ ion would be 9.929 * 10⁻² M

The precipitation of calcium sulfate occurs when the ionic product, Kip is greater than or equal to the solubility product, Ksp of calcium sulfate.

a) The equation of the dissociation of CaSO₄ is given below:

CaSO₄ ⇄ Ca²⁺ + SO₄²⁻

Ksp = [Ca²⁺] * [SO₄²⁻] = 7.10 * 10⁻⁵

Kip = [Ca²⁺] * [SO₄²⁻]

[SO₄²⁻] = Kip/[Ca²⁺]

[Ca²⁺] = 0.100 M

For precipitation to occur;

Kip = Ksp = 7.10 * 10⁻⁵

[SO₄²⁻] = 7.10 * 10⁻⁵/0.100

[SO₄²⁻] = 7.10 * 10⁻⁴ M

Therefore, the concentration of sulfate ion would be required for Ca⁺ to begin to precipitate out as calcium sulfate is 7.10 * 10⁻⁴ M.

b) The concentration of the Ba²⁺ ion would be;

0.100 M - 7.10 * 10⁻⁴ M = 9.929 * 10⁻² M

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The amount of the amino acid glycine that is found in Stan’s apparatus is more than that of murchison meteorite.

It should be noted that amino acid simply means organic compounds that contain both amino and carboxylate.

In this case, the amount of the amino acid glycine that is found in stan’s apparatus is more than that of murchison meteorite. This was depicted by the fraction of the three amino acids in the scenario.

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The actual amount of the amino acid glycine found in Stan’s apparatus is more than the amount of glycine in the Murchison meteorite.

Amino acids are the building blocks of proteins. The building blocks of life are amino acids and proteins.

In this example, the amount of glycine detected in Stan's equipment is more than that found in the Murchison meteorite. The fraction of the three amino acids in the scenario represented this.

Hence amount of amino acid is more in Stan's apparatus as compared to the Murchison meteorite.

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Aldosterone promotes the reabsorption of sodium ions and the excretion of potassium ions in the kidneys, helping to maintain fluid and electrolyte balance in the body.

Aldosterone is a hormone produced by the adrenal glands that plays a crucial role in regulating fluid and electrolyte balance in the body. It acts primarily on the kidneys, where it promotes the reabsorption of sodium ions and the excretion of potassium ions. This process helps to maintain the balance of these electrolytes in the body.

When aldosterone is released, it binds to specific receptors in the cells of the distal tubules and collecting ducts of the kidneys. This binding stimulates the production of proteins that increase the reabsorption of sodium ions from the urine back into the bloodstream. At the same time, aldosterone enhances the excretion of potassium ions into the urine.

By increasing the reabsorption of sodium, aldosterone helps to retain water in the body, which helps to regulate blood volume and blood pressure. This is particularly important in situations where the body needs to conserve water, such as during dehydration or low blood pressure.

Imbalances in aldosterone levels can lead to various fluid and electrolyte disorders. Hyperaldosteronism, for example, is a condition characterized by excessive aldosterone production, which causes increased sodium retention and potassium excretion. This can lead to high blood pressure, fluid retention, and low potassium levels. On the other hand, hypoaldosteronism, which is a deficiency of aldosterone, can result in sodium wasting and potassium retention, leading to low blood pressure, dehydration, and high potassium levels.

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Aldosterone is a hormone that is secreted by the adrenal cortex and affects fluid and electrolyte balance in the body. Its primary function is to increase sodium reabsorption and potassium secretion in the kidneys. Aldosterone also stimulates the reabsorption of water along with sodium, which helps to maintain blood volume and pressure.

Therefore, the effects of aldosterone on fluid and electrolyte imbalances are: Aldosterone regulates sodium levels in the body. When sodium levels are too low, aldosterone is secreted to increase its reabsorption in the kidneys. This helps to maintain normal sodium levels in the blood, preventing hyponatremia. Aldosterone also regulates potassium levels in the body.

It promotes potassium secretion into the urine, which helps to maintain normal potassium levels in the blood, preventing hyperkalemia. Aldosterone regulates water balance in the body. It stimulates water reabsorption along with sodium, which helps to maintain blood volume and pressure. This helps to prevent dehydration and hypovolemia.

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When silver nitrate and sodium chloride are combined with water, silver chloride will solidify and precipitate out of solution. In this instance, silver chloride is the precipitate.

Precipitation includes the following: rain, hail, sleet, and snow. Rain forms when water vapour in clouds condenses on dust particles, which eventually grow too big to stay in the cloud and fall to the ground, where they collect more water and enlarge further.

The chemical reaction between potassium chloride and silver nitrate, in which solid silver chloride precipitated out, is among the greatest examples of precipitation reactions. This precipitation reaction resulted in the formation of an insoluble salt.

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Answer:

When volume is kept constant (kept the same), Gay-Lussac's law states that the pressure of gas varies directly with the temperature of the gas. The equation would be \(\frac{P1}{T1}=\frac{P2}{T2}\), Where P is the pressure (in atm) and T is the temperature (in K°).

Explanation:

Answer:

When volume is kept constant (kept the same), Gay-Lussac's law states that the pressure of gas varies directly with the temperature of the gas. The equation would be , Where P is the pressure (in atm) and T is the temperature (in K°).

Explanation:

The elements fluorine (F), chlorine (CL),and Iodine are all parts of the same _group___ on the periodic table

Answer:

Rate = K[NH4+][NO2–]

Explanation:

Hello there!

In this case, since rate laws include the concentration of the species contributing to the rate of a chemical reaction; this question asserts this reaction is proportional to the concentration of ammonium (NH4+) and the concentration of nitrogen dioxide (NO2–); therefore, the rate law must contain the concentration of both reactants, for that reason, the answer would be Rate = K[NH4+][NO2–] as it contains the concentration of the aforementioned species.

Regards!

Answer:

The spectator ions are CN- and Li+

Explanation:

Spectator ions are ions in a chemical equation that don't participate in the reaction. To identify these ions you have to look for which ions are on both sides of the chemical equation.

In this chemical equation Li+ and CN- are on both sides of the equation making them spectator ions.

The correct lewis structure of methane(CH4)

C. H:C:H:H

Answer:2

Explanation:

The number of valence electrons for a helium atom is 2. This can be confirmed by looking at the electronic configuration.

Helium is placed in the noble gas series as it has certain properties of it. The atomic number of helium is 2. Thus, it has two electrons in its outermost shell but it has completely filled orbital.

Electronic configuration of He = 1s2

Thus, for drawing the electron dot structure, there are two valence electrons.

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