HELP ASAP QUESTION 13

Answer:

To calculate the percent of copper in copper oxide, you would need to know the mass of copper in the compound and the mass of the compound itself. Once you have this information, you would divide the mass of copper by the mass of the compound and multiply by 100 to express the result as a percentage.

Example:

If the mass of copper in copper oxide is 40 grams and the mass of the compound is 100 grams, the percent of copper in the compound would be:

(40/100) * 100 = 40%

It should be noticed that this is an example, I don't have access to the chemical analysis of your copper oxide.

Explanation:

In order to produce a nucleotide, the combinations 11, 12, and 13 may be combined.

The basic unit of DNA and RNA are nucleotides. Genetic material is present in them. Since many biological reactions involving enzymes require coenzymes, nucleotides serve in this capacity. ATP serves as the body's energy storage system.

A phosphodiester bond forms when the 5' phosphate group of one nucleotide and the 3'-OH group of another nucleotide come together during the incorporation of nucleotides into DNA (see below). Phosphate-sugar-phosphate-sugar-phosphate forms the "backbone" of each DNA strand in this way.

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Igneous rock  commonly often contains gas bubbles and the mineral(s) hornblende, muscovite, olivine, lucite, and/or plagioclase.

What are igneous rocks?

Igneous rocks are rocks that form when molten rock cools and solidifies, either below the Earth's surface or on its surface. They are the oldest type of rocks on the planet and are composed primarily of crystals. Examples of igneous rocks include basalt, gabbro, granite, obsidian, pumice, and scoria.

Igneous rocks form from cooling and crystallizing molten rock, or magma. As the magma cools, minerals crystallize out of the molten material, forming the igneous rock. Hornblende, muscovite, olivine, lucite, and/or plagioclase are all common minerals that form as the magma cools, due to their high melting points. Gas bubbles may also form as the magma cools, creating a "vesicular" texture.

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C. the denser the plants the better.

Answer:

C

Answer: Plants with higher density of the bacteria on their roots have increased rates of survival reproduction

Explanation:

Answer:

The correct answer is (C) 0.2 mole MgCl2

Explanation:

Answer:

answer is here bit.^{}ly/3gVQKw3

Federal Marshals will receive trafficking penalty for attempting smuggling.

Human trafficking, also referred to as trafficking in persons, is a crime that entails forcing or coercing a person to perform work or services or engage in sexual acts for monetary gain. The exertion of pressure may be covert or obvious, physical or psychological.

A conviction for keeping someone in servitude carries potential fines and a maximum 20-year prison sentence in a federal facility. The maximum penalty is life in prison if there is a death as a result of the violation or if it involved kidnapping, sexual assault, or other aggravating circumstances.

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Ice will not melt as we need 16.72 KJ of heat but we have only 3.76 KJ

In thermodynamics, the enthalpy of fusion can be described as the change in its enthalpy resulting from giving energy, heat, to a specific amount to change its state from a solid to a liquid.

Given the reaction is  2 Na (s) + 2 H₂O(l) → 2 NaOH (aq) + H₂ (g)

Given the mass of sodium = 0.470 g

The moles of sodium = 0.470/23 = 0.020 mol

Given that two moles of sodium (Na) release heat = 368 KJ

Heat released by 0.020 mol of sodium (Na) = (368/2) × 0.020 = 3.76 KJ

Given the mass of ice = 50g

The number of moles = 50/18 = 2.78 mol

For melting, one mole of ice heat is required = 6.02 kJ/mol.

For 2.77 mol of ice = 6.02 × 2.78 = 16.72 KJ

But we have only 3.76 KJ of heat therefore, the ice will not melt.

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Physical characteristics known as size dependant properties alter as an object's size does. Examples of qualities that depend on size include length, width, height, volume, and mass.

The amount or size of the material affects several physical properties of matter, including length, mass, volume, weight, and so forth. These characteristics of matter and their values change together with the size or quantity of the substance.

In physics, mass is a way to measure inertia, a fundamental property of all matter. In actuality, it is the resistance a body of matter provides to a change in its speed or location.

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Atoms are basically the smallest units of matter. They are made up of  protons, neutrons and electrons.

The periodic table is a tabular arrangement of the chemical elements which are organized on the basis of their atomic numbers, electron configurations, and recurring chemical properties. The periodic table lists the elements in order of increasing atomic number and grouped into rows (periods) and columns (groups). The elements in the same column have similar chemical properties, with the elements in the same row having similar outer electron configurations.

Atom X: Number of protons = 6

Atom Y: Number of protons = 6

b. Atoms X and Atom Y are in the same family; but not the same row; in the periodic table.

Hence, Option B is correct.

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The question is:

Question 3 (5 points) (02.06 MC) The table compares some characteristics of two atoms_ Charged Particles Atom Number 0f Neutrons Mass Number] Use the table t0 determine the number of protons for each atom: Then_ choose the statement below that Is true about the two atoms_ points) Atom X and Atom are in the same row; but not the same family; on the periodic table Atoms X and Atom Y are in the same family; but not the same row; in the periodic table; Atom Xis in a column to the right of Atom Y in the periodic table: Atom X and Atom occupy the same position in the periodic table because they are isotopes.

Answer:

True

Explanation:

The heat of the earths mantle is estimated to be between 1000-3700 degrees celcius, and the earths core is estimated to be higher than 5200 degrees Celsius so even if the higher end estimates are true for the mantle it wouldn’t affect the answer.

Also the fact the core is closer to the center of the earth it ends up being hotter due to the pressure being higher the lower you go as the ground below has to carry more weight above.

sources:

“National Geographic.” National Geographic, https://www.nationalgeographic.org/encyclopedia/mantle/. Accessed 8 May 2021.

“National Geographic.” National Geographic, https://www.nationalgeographic.org/encyclopedia/core/. Accessed 8 May 2021.

Answer:

sure mantle is hotter than the core

Answer:

A. Solar, wind, hydro, nuclear, tidal, and biomass are renewable resources

B. Oil, coal, and natural gasses are the fossil fuels that are nonrenewable resources

C. It is important to move from nonrenewable to renewable because nonrenewable resources will run out and they also create greenhouse gases that hurt the enviroment and cause global warming. Renewable resources are cleaner and either don't run out, or replenish fast enough to not run out

Answer:

HCl acts as an excess reagent

Explanation:

The reaction equation is;

PbO + 2HCl → PbCl2 + H20

Number of moles of PbO = 13g/223.2 g/mol = 0.058 moles

Since the mole ratio is 1:1, 0.058 moles of PbCl2 is produced

Number of moles of HCl = 6.4 g/36.5g/mol = 0.175 moles

2 moles of HCl yields 1 mole of PbCl2

0.175 moles yields 0.175 moles * 1/2

= 0.0875 moles of PbCl2

Hence; PbO yields the least number of moles of product so it is the limiting reactant and HCl is the reactant in excess

Answer:

Acidic

Explanation:

the pH scale ranges from 0 to 14, where 7 means the substance is neutral. Less than 7 means the substance is Acidic. Greater than 7 means the substance is Basic.

Remember that the lower the pH is, the more Acidic the substance is. In this case lemon juice is Acidic.

Answer:

The 2nd option

Answer: B:Light moves in a straight line except at surfaces between different transparent materials, where its path bends.

Explanation:

Answer:

c

Explanation:

took it

The number of moles of a monoprotic acid neutralized is equal to 0.025 mol.

A neutralization reaction can be defined as a reaction in which reaction of an acid and base generates salt and water. When a strong acid and a strong base react the salt can be neither acidic nor basic.

When monoprotic acid HA reacts with NaOH (a strong base), the resulting salt is NaA and water.

HA    +    NaOH   →   NaA  +   H₂O

Given, the concentration of NaOH = 0.544 M

The volume of the NaOH = 45.50 ml = 45.50 × 10⁻³

The number of moles of NaOH, n = M × V = 0.544 × 45.50 × 10⁻³ = 0.025 mol

The number of moles of HA monoprotic acid = moles of NaOH = 0.025 mol

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Carbon Dioxide: CO2

Formula: C + O2

15.0 moles of CO2 contains (15.0 moles CO2) x (1 mole C / 1 mole CO2) = 15.0 moles of C

Carbon Dioxide: CO2

Formula: C + O2

15.0 moles of CO2 contains (15.0 moles CO2) x (2 moles O / 1 mole CO2) = 30.0 moles of O

Calcium Chloride: CaCl2

Formula: Ca + 2Cl

23.0 moles of CaCl2 contains (23.0 moles CaCl2) x (1 mole Cl / 2 moles Cl) = 11.5 moles of Cl

Sulfur Dioxide: SO2

Formula: S + O2

295.0 grams of SO2 contains (295.0 grams SO2) x (1 mole S / 64.066 grams) = 4.6 moles of S

Potassium Sulfate: K2SO4

Formula: 2K + S + 4O

295.0 grams of K2SO4 contains (295.0 grams K2SO4) x (1 mole S / 174.259 grams) = 1.69 moles of S

Iron: Fe

Formula: Fe

565.0 grams of Fe contains (565.0 grams Fe) x (1 mole Fe / 55.845 grams) = 10.15 moles of Fe

metallic elements

SO2 is a covalent compound. It consists of one sulfur atom and two oxygen atoms joined together by covalent bonds, which are strong chemical bonds where electrons are shared between atoms.

H

|

O-H

A water molecule is polar because the electrons are not shared equally between the oxygen and hydrogen atoms. Oxygen is more electronegative than hydrogen, so it pulls the electrons closer to itself, creating a partial negative charge on the oxygen side of the molecule and a partial positive charge on the hydrogen side. This causes the molecule to have a dipole moment and makes the molecule polar.

NH3 (Ammonia) - the molecule is a pyramidal shape, which means that the Nitrogen is at the center and the three hydrogen atoms are located at the three corners of a pyramid.

H2O (Water) - the molecule is a V-shape, this shape is determined by the angle between the two bonding pairs and the two non-bonding pairs of electrons.

CH4 (Methane) - the molecule is tetrahedral shape, the carbon is in the center, and the four hydrogen atoms surround the carbon in a tetrahedral arrangement.

A color change

The formation of a precipitate

The evolution of a gas

A change in temperature

Uday Tahlan

The theoretical yield of water in this reaction is 1 mole (18.015 grams) of water.

Theoretical yield is the amount of a product one would expect to yield from a reaction if it proceeds to completion, according to a balanced chemical equation. It is calculated by multiplying the limiting reactant by the molar ratio between the reactants and the products. The actual yield of a reaction is usually lower than the theoretical yield, due to a number of factors such as incomplete conversion of reactants to products, product losses, and impurities in the reactants. Theoretical yield is used to calculate the percentage yield of a reaction, which is the ratio of the actual yield to the theoretical yield multiplied by 100.

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Answer:

360.g water

Explanation:

1.53 × 10⁻⁵ moles of aspartame are present in 4.50 mg of aspartame.

Two amino acids, aspartic acid and phenylalanine, make up the low-calorie sweetener known as aspartame. In addition to being present in tabletop sweetener packets, aspartame is a common component used to substitute sugar in low-calorie foods and beverages.

Here there are 4.50 mg of aspartame.

First, the mass is converted from mg to g by:

1 g = 1000 mg

So, 1 mg = 0.001 g

So, 4.5 mg = 4.5 × 10⁻³ g

Molar mass of aspartame = 294.40 g/mol

So, Number of moles of aspartame = [tex]\frac{Given mass}{Molar mass}[/tex]

or, n = 4.5 × 10⁻³ / 294.3

or, n = 1.53 × 10⁻⁵ moles.

Hence, 4.50 mg of aspartame has 1.53 × 10⁻⁵ moles of aspartame.

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Answer:

n = 12.18 moles

Explanation:

Given that,

The volume of a canister, V = 1 L

The temperature of the canister, T = 100 K

Pressure, P = 100 atm

We need to find the number of moles of gas. Let there are n number of moles. We know that,

PV = nRT

Where

R is gas constant, R = 0.0821 L*atm/mol*K

[tex]n=\dfrac{PV}{RT}\\\\n=\dfrac{100\times 1}{0.0821 \times 100}\\\\n=12.18\ moles[/tex]

Hence, there are 12.18 moles of gas.

Answer:

I think it would be B

Explanation:

Im sorry if its wrong!!!!!!!

Answer:

The bromine atom in bromine fluoride, or BrF, has an oxidation number of +1. In bromine dioxide, or BrO2, it has an oxidation number of +4. This is because fluorine usually has an oxidation number of -1, and oxygen usually has an oxidation number of -2.

Explanation:

I got this from online so...

Propanol, because its molecules can form hydrogen bonds with water molecules.

Reason:

Therefore, propanol is more soluble in water than Ethane.

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Answer:

the answer is d which is soap solution because it's a soap solution that can measure the degree of hardness of a water if the water forms with this soap solution then the water is hard but if the water forms foam with soap then it is soft

Answer:

soap solution because when it is combined with water you can get to your answer and that it is right or experiment it

Use the grams to moles formula to calculate the number of moles, n, of a substance with a given mass, m, (in grams) accurately, where M denotes the substance's molar mass. Typically, g/mol is used as the unit.

n = m / M

The mole is the SI unit used to measure a substance's quantity. There are precisely 6.02214085774× 10²³ atoms, molecules, or other particles in one mole of matter. The Avogadro number is this enormous magnitude. A mole of a substance is defined as a mass of material that contains exactly 12,000 g of 12C's exact number of atoms as fundamental units. The International System of Units uses the mole (symbol: mol) as the unit of material quantity (SI). 

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We measure the distance through many objects like; Radar, Parallax, Capheids, Redshift and Hubble's Law etc.

Distance is termed as the size or magnitude of the displacement between two positions.  

There are several ways to measure the distance in terms of science. Firstly, Radar: It is used to measure the distance in our solar system and to measuring the distances to nearby the stars are Parallax. Whereas, Capheids is also used to measuring the distance in our galaxy and to nearby the galaxies. However, Supernovae will measuring the distances to other galaxies and the last one is Redshift and Hubble's Law it is used to measuring the distances to objects which is far away.

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