When a mixture of carbon and water is filtered what is the residue

Answer:

Answer is 'b' Soft drink

Explanation:

An iron nail kept in a soft drink will lose its shine and appear dull. Because mustard oil, coconut oil, and kerosene have no reaction with iron nails, they do not lose their shine when maintained in these solutions.

Answer:

1: table sugar has more calories

2: Hydrogen and carbon monoxide and smaller quantities of methane, carbon dioxide, and hydrocarbons

Explanation:

Give brainliest

84.2565

Because

1 silica is equal to 28.0855,

times 3 is 84.2565

The conversion factor from electrino to coulombs is 1.60×10−19.

The term charge refers to a particle that is positively or negatively charged. The electron is a particle that is negatively charged. One of the popular units that could be used when dealing with electrons is the electrinos.

We know that;

1 electrino = 1.60×10−19 C

It then follows that the conversion factor from electrino to coulombs is 1.60×10−19.

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Answer:

When observing plants, there are several things you can look for to learn more about them and their environment. Here are some things to consider:

Appearance: Take note of the plant’s size, shape, color, and overall appearance. Look for any distinctive features such as flowers, fruits, or seeds.

Growth: Observe how the plant is growing and changing over time. Is it growing taller or wider? Are new leaves or branches emerging?

Health: Look for signs of health or stress in the plant. Are the leaves green and vibrant or yellow and wilted? Are there any signs of disease or insect damage?

Environment: Consider the plant’s surroundings and how they might be affecting its growth and health. Is the plant in a sunny or shady spot? Is the soil moist or dry? Are there other plants growing nearby that might be competing for resources?

By paying attention to these factors and others, you can learn a lot about the plants you are observing and their relationship with their environment.

Answer: c

Explanation:

Answer:

How many gallons of water are on earth?

Why does salt water make you sticky and burn our eyes so bad?

Explanation:

These are just a couple questions I came up with just now

I hope that this helps

The structures show the different possible locations of the double bond and the distribution of electrons. The actual structure of the nitrite ion is a combination or hybrid of these resonance structures, with delocalized electrons.

The polyatomic nitrite ion, NO₂⁻, consists of a central nitrogen atom bonded to two oxygen atoms. To draw the Lewis structure, we need to determine the total number of valence electrons and distribute them among the atoms while satisfying the octet rule.

Count the total number of valence electrons:

Nitrogen (N) contributes 5 valence electrons.

Each oxygen (O) contributes 6 valence electrons.

Total valence electrons: 5 + 2(6) + 1 = 18

Place the atoms and connect them with single bonds:

N-O

Distribute the remaining electrons to complete the octet of each atom:

Place two lone pairs (4 electrons) on each oxygen atom, and distribute the remaining 8 electrons around the nitrogen atom.

Refer image attached below for Lewis structure of the nitride ion.

Check if all atoms have a complete octet:

The oxygen atoms each have 2 lone pairs, resulting in an octet (8 electrons).

The nitrogen atom has 3 lone pairs and a bonding pair, resulting in an expanded octet (10 electrons).

However, in the case of nitrite ion (NO₂⁻), the nitrogen atom can form resonance structures by moving a lone pair from one of the oxygen atoms to form a double bond. This allows for the delocalization of electrons and the stabilization of the molecule.

Therefore, the resonance structures of nitrite ion (NO₂⁻) are:

O=N-O O-N=O

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Answer:

Yes, because the water solvent is better

Explanation:

Hope this helps

You divide by the mass of the solution.

Percent by mass is the mass of the solute divided by the mass of the solution, multiplied by 100.

Example:

You dissolve a 4.00 g sugar cube in 350 mL of tea at 80 °C. The density of water at 80 °C is 0.975 g/mL. What is the percent by mass of sugar in the solution?

Solution

Step 1 — Determine mass of the solute.

The solute is the sugar cube. Mass of solute = 4.00 g.

Step 2 — Determine mass of solvent.

The solvent is the 80 °C water. Use the density of the water to find the mass.

mass of solvent = 350 mL ×

0.975

g

1

mL

= 341 g

Step 3— Determine the total mass of the solution

mass of solution = mass of solute + mass of solvent = 4.00 g + 341 g = 345 g

Step 4 — Determine percent composition by mass of the sugar solution.

% by mass =

mass of solute

mass of solution

× 100 % =

4.00

g

345

g

× 100 % = 1.159 %

The percent composition by mass of the sugar solution is 1.159 %.

Answer:

neon gas is the closest noble gas to magnesium ( mg ) on the periodic table.

Explanation:

hope this answer will help you

Answer:

A

Explanation:

Answer:

lol don't know please don't report me

The density of gold in SI units is 19,000 kg/m³. Gold's relative density of 19 means that it is 19 times denser than water at 4°C, which has a density of 1000 kg/m³. Therefore, by multiplying the relative density of gold by the density of water, we can find the density of gold in SI units. In this case, 19 multiplied by 1000 kg/m³ equals 19,000 kg/m³, which is the density of gold in SI units.

In the context of this problem, the relative density of a substance is defined as the ratio of its density to the density of a reference substance, in this case, water at 4°C. By multiplying the relative density by the density of the reference substance, we can calculate the density of the substance in SI units.

In this example, the relative density of gold is 19, indicating that gold is 19 times denser than water at 4°C. Multiplying the relative density by the density of water (1000 kg/m³) yields the density of gold as 19,000 kg/m³ in SI units.

To summarize, the density of gold in SI units is 19,000 kg/m³. The relative density of gold is 19, indicating that it is 19 times denser than water at 4°C, which has a density of 1000 kg/m³.

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Answer:167.9 g Ag

Explanation: 1 mol Cu + 2 mol AgNO3 = 2 mol Ag + 1 mol Cu(NO3)2

63.55 g Cu —> 2*107.688 g Ag

So 49.1 g Cu —> (49.1/63.55)*2*107.688 = 167.9 g Ag

"Hypotonic solution," refers to a solution with the highest water concentration due to its lower solute concentration compared to the other options, leading to water influx into cells.

A hypotonic solution would be most likely to have the highest water concentration. In a hypotonic solution, the solute concentration is lower than that inside the cell or compared to another solution. As a result, water tends to move into the cell or the solution to equalize the concentration.

When a cell is placed in a hypotonic solution, water molecules will move into the cell through the process of osmosis. This influx of water increases the water concentration inside the cell, leading to cell swelling or even bursting in extreme cases.

Compared to hypertonic and isotonic solutions, a hypotonic solution has a lower solute concentration, allowing for a higher concentration of water molecules. This results in a higher water concentration in the solution. It's important to note that the concept of tonicity is related to the relative solute concentrations between two solutions and their effect on cell osmosis. In this case, a hypotonic solution is characterized by a higher water concentration compared to the other options.

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This is a balanced chemical reaction equation since the number of atoms of each of the elements is the same on both sides of the reaction equation.

We know that the term chemical reaction has to do with the kind of interaction that does occur between reactants and products. In this case, we have the reaction that exists between methane and oxygen. This is a combustion reaction.

There is one carbon atoms on the reactant side and one carbon atom on the products side. There are four hydrogen atoms of the reactants side and fur hydrogen atoms on the products side. There are four oxygen atoms on the reactants side and four oxygen atoms on the products side.

There are two oxygen molecules on the reactants side and there are two water molecules on the products side. This is a balanced chemical reaction equation.

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The volume of dry hydrogen gas collected at STP is 33.6 liters.

When aluminum reacts with acid, it undergoes a single replacement reaction to form aluminum salt and hydrogen gas. The balanced chemical equation for the reaction is:

\(2Al + 6HCl \rightarrow 2AlCl_3 + 3H_2\)

From the equation, we can see that 2 moles of aluminum react with 6 moles of hydrochloric acid to produce 3 moles of hydrogen gas. The molar mass of aluminum is 26.98 g/mol and the molar mass of hydrogen is 1.008 g/mol.

First, we need to calculate the number of moles of aluminum in the sample:

0.885 g / 26.98 g/mol = 0.0328 mol Al

Next, we can use the mole ratio from the balanced chemical equation to find the number of moles of hydrogen gas produced:

\($\frac{3\ \text{mol H}_2}{2\ \text{mol Al}} = 1.5\ \text{mol H}_2$\)

Finally, we can use the ideal gas law to find the volume of dry hydrogen gas produced at standard temperature and pressure (STP):

PV = nRT

where P = 1 atm, V is the volume of gas, n = 1.5 mol, R = 0.08206 L atm/mol K (gas constant), and T = 273.15 K (standard temperature)

\($V = \frac{nRT}{P} = \frac{(1.5\ \text{mol})(0.08206\ \text{L}\cdot\text{atm/mol}\cdot\text{K})(273.15\ \text{K})}{1\ \text{atm}} = 33.6\ \text{L}$\)

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Answer:

Strong Nuclear Force

Explanation:

Strong Nuclear Force; is the force that keeps the nucleons bound inside the nucleus of an atom. It is a short range attractive force that acts between all nucleons in the nucleus of the atom that is much stronger than electrical forces. 

Answer:

nuclear force

Explanation:

Because they only have one valence electron to pair, hydrogen atoms can only form one covalent bond.

Double and triple bonds can't rotate because of their pi bonds. This stiffness affects the physical makeup of compounds and may have an impact on their chemical reactivity.

1.Two hydrogen atoms, each of which contains a single electron in its valence shell, can be used to demonstrate this idea. The first shell, which has just two electrons, serves as the valence shell for tiny atoms like hydrogen atoms.

However, when two hydrogen atoms are close enough to one another, they can share their valence electrons, which results in both hydrogen atoms having two electrons in their respective valence shells. Covalent bonds are formed when atoms share electrons, and the two electrons that form these bonds are referred to as bonding pairs of electrons. A molecule is the smallest component of a compound that retains the chemical identity of that compound and is defined as a discrete group of atoms joined by covalent bonds.

2. When it comes to reactions, we will discover that a system is often more stable when a double bond is replaced by two single bonds. Second, the presence of a double bond prevents rotation while there is essentially free rotation around the axis of a single bond.

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Answer: C.

Explanation:

They are the same elements that contain same number of protons, but different numbers of neutrons.

Answer:

Hydrogen and Cobalt

Explanation:

Break up each individual element

- Hope that helps! Please let me know if you need further explanation.

a)the number of moles of CaCO3 used is approximately 0.005096 mol. b) the molarity of solution is approximately 0.02038 M. c) the number of moles of the solution is approximately 5.095 × 10^(-4) mol.

a. To find the number of moles of CaCO3 used, we need to divide the given mass by the molar mass of CaCO3.

Given:

Mass of CaCO3 = 0.5100 g

Molar mass of CaCO3 = 100.1 g/mol

Number of moles of CaCO3 = Mass / Molar mass

Number of moles of CaCO3 = 0.5100 g / 100.1 g/mol

Number of moles of CaCO3 ≈ 0.005096 mol (rounded to 4 decimal places)

b. To determine the molarity of Ca^2+ in the 250 mL of solution, we need to use the number of moles of CaCO3 and the volume of the solution.

Given:

Number of moles of CaCO3 = 0.005096 mol

Volume of solution = 250.0 mL = 0.250 L

Molarity of Ca^2+ = Number of moles / Volume

Molarity of Ca^2+ = 0.005096 mol / 0.250 L

Molarity of Ca^2+ ≈ 0.02038 M

c. To calculate the number of moles of Ca^2+ in a 25.0-mL aliquot of the solution, we can use the molarity of Ca^2+ obtained in part (b) and the volume of the aliquot.

Given:

Molarity of Ca^2+ = 0.02038 M

Volume of aliquot = 25.0 mL = 0.025 L

Number of moles of Ca^2+ = Molarity × Volume

Number of moles of Ca^2+ = 0.02038 M × 0.025 L

Number of moles of Ca^2+ = 5.095 × 10^(-4) mol

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Answer:

61.39%

Explanation:

The percent yield of a substance can be calculated using the formula:

Percent yield = actual yield/theoretical yield × 100%

Based on the information provided on the reaction in this question, the theoretical yield is given as 99.2g while the actual yield is given as 60.9g.

Hence, the percent yield is calculated thus:

% yield = 60.9/99.2 × 100

% yield = 0.6139 × 100

% yield = 61.39%

The percent yield is 61.39%

Answer:

c i think

Explanation:

Answer:

A large counting unit like the mole is used to count atoms because atoms are too small to count individually. We use the mole to count atoms and molecules because otherwise, we would have to write out very large numbers to show how many atoms were in a certain amount of a substance. Moles are like donuts.

According to the mole concept, mole can also be used for counting large things.

According to mole concept,mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

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Answer:

n = 0.157

Explanation:

To solve that question, we need to follow this equation: PV = nRT

V = 435ml (must be convert to L by ÷ by 1000) = 0.435 L

P = 6780 torr (must be convert to atm by ÷ by 760) = 8.92 atm

T = 28C (must convert to K by + 273.15) = 301.15 K

R = 0.08205

n = ?

PV = nRT

8.92 x 0.435 = n x 0.08205 x 301.15

3.88 = n x 24.7

Divided both sides by 24.7 (left n)

3.88/24.7 = n

0.157 = n

So 0.157 is the answer!