which of the following statements about minerals is false? minerals in plant foods tend to be absorbed better than animal foods. the percentage of minerals that is absorbed varies tremendously. minerals are not destroyed in cooking. minerals can be toxic when consumed in excess, which may be only slightly higher than the recommended level.

There are 1825.6 g in a 14.5 moles Lithium permanganate

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass :

\(\tt mol=\dfrac{mass}{MW}\)

moles of Lithium permanganate = 14.5

Lithium permanganate (LiMnO4) MW=125.9 g/mol, so mass :

\(\tt mass=mol\times MW\\\\mass=14.5\times 125.9~g/mol\\\\mass=1825.6~g\)

The statistic that provides a better indication of the overall location (centre) of the distribution of CO2 emissions in 2020 is the total CO2 emissions by country.

To determine the overall location or center of the distribution of CO2 emissions, it is crucial to consider the total CO2 emissions by country rather than just the number of countries or their consumption of fossil fuels. The main reason for this is that most of the world's CO2 emissions come from a relatively small number of countries that have high levels of industrial activity and large populations.

When we examine the total CO2 emissions by country, we can identify the countries that contribute the most to global emissions. These countries typically have extensive industrial sectors, rely heavily on fossil fuels for energy production, and have large populations. By focusing on the total emissions, we can gain a more accurate understanding of the distribution of CO2 emissions worldwide.

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Answer:

a chemical change

Explanation:

bubbles formed

Answer:

Explanation:

✔︎A chemical change

✖︎wich is D

 would be ur answer

Explanation:

❐A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust. Chemical changes occur through the process of chemical reactions, and the resulting substances have different properties because their atoms and molecules are arranged differently.

CAN I PLZ GET MARK AS THE BRAINLIEST? ")

The cash payback period is a useful metric for evaluating the time it takes for a project to generate sufficient cash inflows to recover the initial investment. To calculate the cash payback period for ZIP, we need to determine the number of years it will take for the cumulative cash inflows to equal the initial investment of $126,720.

To do this, we can use the formula: Cash Payback Period = Initial Investment / Annual Net Cash Inflows Where Annual Net Cash Inflows = Annual Cash Inflows - Annual Cash Outflows Plugging in the values given in the problem, we get: Annual Net Cash Inflows = $79,100 - $40,700 = $38,400 Cash Payback Period = $126,720 / $38,400 = 3.3 years Therefore, it will take approximately 3.3 years for the project to generate enough cash inflows to recover the initial investment. This is a relatively short payback period, which suggests that the project may be a viable investment opportunity for Vanhoe Company. However, it is important to consider other factors such as the project's profitability, risk, and long-term strategic fit with the company's goals before making a final decision.

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Answer:

On average, agriculture accounts for 70 percent of global freshwater withdrawals. In the last 30 years, food production has increased by more than 100 percent. FAO estimates that about 60 percent more food will be needed by 2050 to meet the food requirements of a growing global population.

Explanation:

Because i learnt this before and i aced a test about it dont worry

Answer: the eukaryotic cell

Explanation: Animal cells are typical of the eukaryotic cell, enclosed by a plasma membrane and containing a membrane-bound nucleus and organelles. Unlike the eukaryotic cells of plants and fungi, animal cells do not have a cell wall.

884.99 g of copper(II) sulfide would be formed if 18.5 moles of copper reacts.

The balanced equation for the reaction between copper and sulfur is:

2 Cu + S₈ → 2 CuS

This equation shows that 2 moles of copper react with 1 mole of sulfur to produce 2 moles of copper(II) sulfide.

Therefore, for every 2 moles of copper that react, 2 moles of copper(II) sulfide are produced.

To determine the mass of copper(II) sulfide formed, we need to know the mass of copper that reacted. We can use the molar mass of copper to convert the number of moles of copper to its mass:

m(Cu) = n(Cu) × M(Cu)

m(Cu) = 18.5 mol × 63.55 g/mol

m(Cu) = 1174.18 g

So, 1174.18 g of copper reacted. Using the stoichiometric coefficients from the balanced equation, we can calculate the number of moles of copper(II) sulfide formed:

n(CuS) = n(Cu) / 2

n(CuS) = 18.5 mol / 2

n(CuS) = 9.25 mol

Finally, we can use the molar mass of copper(II) sulfide to convert the number of moles to its mass:

m(CuS) = n(CuS) × M(CuS)

m(CuS) = 9.25 mol × 95.61 g/mol

m(CuS) = 884.99 g

Therefore, 884.99 g of copper(II) sulfide would be formed if 18.5 moles of copper reacts.

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Answer: 1 mole of water (H2O)

Answer: 6 total atoms

Explanation:

Answer:

Weather is : the state of the air and atmosphere at a particular time and place : the temperature and other outside conditions (such as rain, cloudiness, etc.) at a particular time and place. And how to fold clothes:

Fold in one side of the shirt towards the centre, about a third.

Fold the sleeve back the other direction, away from the centre.

Long sleeves can be folded again down towards the hem.

Repeat on the other side.

Fold the collar end towards the bottom hem, making a rectangle.

Explanation:

Answer:

Weather is the state of the air and atmosphere at a particular time and place: the temperature and other outside conditions (such as rain, cloudiness, etc.) in a specific time and place. And how to fold clothes

Explanation:

Fold about a third in one side of the shirt towards the center.

Fold the sleeve back in the other direction, away from the center.

Long sleeves can be folded again down towards the hem.

Repeat on the other side.

Fold the collar end towards the bottom hem, making a rectangle.

The volume at which the gas must be compressed is 17.6 dm³, under the condition that a sample of carbon dioxide that initially occupies 15.0 dm³ at 250 K and 1.00 atm.

For the given case, we are given that the initial volume of carbon dioxide is 15.0 dm³ at 250 K and 1.00 atm and that it undergoes an isothermal compression. Its entropy decreases by 10 J/K.

Now to find the final volume of carbon dioxide, we can apply the formula ΔS = -Q/T = nR ln(V2/V1)
Here
n = number of moles of carbon dioxide,
R = gas constant,
V1 and V2 = initial and final volumes of carbon dioxide respectively .

So ,ΔS = -10 J/K, we can evaluate for V2

V2 = V1 exp(-ΔS/nR)

Here exp() denotes the exponential function.

Staging values

V2 = (15.0 dm³) exp(-(-10 J/K)/(8.314 J/(mol K) × 250 K))

V2 ≈ 17.6 dm³

Therefore, into what volume must the gas be compressed to reduce its entropy is approximately 17.6 dm³.


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The complete question is
A sample of carbon dioxide that initially occupies 15.0 dm3 at 250 K and 1.00 atm is compressed isothermally. Into what volume must the gas be compressed to reduce its entropy by 10.0 J K-1?

Answer:

Hydroxyl

Explanation:

A P E X

Answer:

C

Explanation:

it to avoid mistakes and understand each other more easily and ensures wide world dissemination of the Si and modifies the Si to its latest advanced in technology. I hope this help!

Answer:

C. makes the most sense to me.

So sorry if this is not right. But Hope This Helps!

In 310 g of magnesium ions (Mg²⁺), there are approximately 7.69 × 10²⁴ magnesium ions. This calculation involves converting the mass of magnesium ions to moles.

To determine the number of ions in 310 g of magnesium ions (Mg²⁺), we need to convert the mass of magnesium ions to the number of moles and then use Avogadro's number to calculate the number of ions.

The molar mass of magnesium (Mg) is approximately 24.31 g/mol.

Number of moles = Mass / Molar mass

              = 310 g / 24.31 g/mol

              = 12.75 mol (rounded to two decimal places)

There is one magnesium ion in one mole of magnesium ions (Mg²⁺).

Number of magnesium ions

= Number of moles × Avogadro's number × Number of ions per mole

= 12.75 mol × 6.022 × 10²³ ions/mol × 1 ion

≈ 7.69 × 10²⁴ magnesium ions

Therefore, there are approximately 7.69 × 10²⁴ magnesium ions in 310 g of magnesium ions (Mg²⁺).

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The balanced chemical equation of the reaction between aluminum metal with aqueous sulfuric acid to form aqueous aluminum sulfate and hydrogen gas is 2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂.

A chemical equation is a symbolic representation of a chemical reaction where reactants are represented on the left, and products on the right.

According to this question, aluminum metal reacts with aqueous sulfuric acid to form aqueous aluminum sulfate and hydrogen gas.

This reaction will be balanced only if the atoms of each element on both sides of the equation are the same. The chemical reaction is as follows:

2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂.

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Answer and explanation

The solvent in the graph is water (H2O), water tells us that these substances dissolve at different amount of water, and the dissolvation is different in different temperatures in water. For example, NaCl readily dissolves in water.

Answer:

1045 J

Explanation:

By using the formula Eh= mass×specific heat capacity × change in tempreture

With it being a known fact that the specific heat capacity of water is 4.16g/j/°c

Answer:

Sound travels at different speeds depending on what it is traveling through. Of the three mediums (gas, liquid, and solid) sound waves travel the slowest through gases, faster through liquids, and fastest through solids.

Explanation:

hope this helps

The neutral atom with a nuclear charge of +9 and a nuclear mass of 19 amu is fluorine-19. It has 10 neutrons and 9 electrons.

The atomic number of an element is equal to the number of protons in its nucleus. Therefore, if an atom has a nuclear charge of +9, it means it has 9 protons. The nuclear mass of an atom is the sum of its protons and neutrons. Since we know the nuclear mass of this atom is 19 amu, and it has 9 protons, it must have 10 neutrons (19 - 9 = 10).

To determine the number of electrons, we need to know the charge of the atom. Since it is a neutral atom, it has no net charge. This means the number of electrons must be equal to the number of protons, which is 9.

Therefore, the identity of the neutral atom is fluorine-19, with 9 protons, 10 neutrons, and 9 electrons.

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The second option Al, Si, I, Au contain halogen that is Iodine (I).

Thus, second option contain halogen.

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Answer:

There is at least 2 ways. First, the isotopes are allowed to heat water into steam, and the steam turns a generator. 2nd, the isotopes are allowed to heat one end of a "thermopile", and the thermopile powers electronics

Hope this helped you!

Answer:

the main aim of balance in an equation is making show that the total number of substances on the reactant side is equal to the total number of substances on the product side

Explanation:

so if we were to balance the equation of water water is a compound containing two molecules of hydrogen and one molecule of oxygen therefore

H+O=H2O

\(H+O_2= H_2O\)

Element | Reactant | Product

H | 1 × 4 | 2×2

O | 2 | 1 × 2

\(4H+O_2= 2H_2O\)

Answer:

3

Explanation:

Brainliest, please!

Answer:

Hess’s Law describes how the __Heat__ energy of a reaction consists of the _Enthalpy__ of the energy changes of the individual step reactions

Explanation:

Hess law is a legendary law which is given by

\(\\ \rm\Rrightarrow ∆H_{net}=\sum \delta H_r\)

All atoms of uranium have the same atomic number, which is 92. This means that every uranium atom has 92 protons in its nucleus.

The number of protons determines the element's identity, so all atoms of uranium have the same chemical properties.

The mass number of uranium, however, may vary between different isotopes. Uranium has two major isotopes, uranium-235 and uranium-238, which have 143 and 146 neutrons, respectively. The sum of protons and neutrons in the nucleus of an atom is called its mass number. Therefore, the mass number of uranium-235 is 235 (92 protons + 143 neutrons) and the mass number of uranium-238 is 238 (92 protons + 146 neutrons).

The number of neutrons plus electrons is not a commonly used term in describing atomic properties. The number of electrons in a neutral atom is equal to the number of protons, which is 92 in the case of uranium. However, the number of neutrons plus electrons may vary depending on the ionization state of the atom.

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Answer:

P₂ = 80 KPa

Boyle's law is applied.

Explanation:

Given data:

Initial volume = 180 L

Initial pressure = 35.5 KPa

Final pressure = ?

Final volume = 80.0 L

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

35.5 KPa × 180 L = P₂ × 80.0 L

P₂ = 6390 KPa. L/ 80.0 L

P₂ = 80 KPa

Answer:

D.) An acid and a base

Explanation:

One part of an acid is H+ and the other part is a negatively charged ion. One part of a base is -OH and the other part is a positively charged ion. When an acid and base react, the H+ and -OH combine to form water and the ions combine to form a salt.

The others are incorrect because they do not guarantee that water (H2O) and a salt are products.