A student designed an experiment where all metals were first reacted with hot HCl. Is this a good idea?

The balanced chemical equation for the reaction between magnesium and sulfur can be written as:Mg + S → MgSUsing this equation, we can determine the number of grams of magnesium sulfide produced when 2.3 grams of magnesium combines with 7.6 grams of sulfur. The first step is to determine which of the reactants is limiting.

The limiting reactant is the reactant that is completely consumed when the reaction goes to completion. The other reactant is in excess and will be left over once the reaction is complete.To determine the limiting reactant, we need to convert the mass of each reactant to moles. The molar mass of magnesium is 24.31 g/mol, and the molar mass of sulfur is 32.06 g/mol.Moles of Mg = 2.3 g / 24.31 g/mol = 0.0945 molMoles of S = 7.6 g / 32.06 g/mol = 0.237 molThe ratio of moles of magnesium to moles of sulfur is 1:1.

Therefore, magnesium is the limiting reactant.To determine the mass of magnesium sulfide produced, we need to use the stoichiometry of the balanced equation. One mole of magnesium reacts with one mole of sulfur to produce one mole of magnesium sulfide. Therefore, 0.0945 moles of magnesium will react with 0.0945 moles of sulfur to produce 0.0945 moles of magnesium sulfide.Mass of MgS = 0.0945 mol × 56.30 g/mol = 5.32 g.

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the atomic radius is 0.144 nm.

Given:

FCC structure. Lattice constant = a = 0.40788 nm.

Atomic radius = r.

According to the definition of the FCC structure, there are 4 atoms per unit cell.

So, the length of the face diagonal can be found as follows:

a√2 = 0.40788 nm√2a = 0.40788 nm/√2a = 0.288 nm

From this, the radius can be calculated:

r = a/2r = 0.288 nm/2r = 0.144 nm

Therefore, the atomic radius is 0.144 nm.

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A clear pond has a greater concentration of dissolved oxygen than a pond with a heavy algal mat.

1. A clear pond has a greater concentration of dissolved oxygen than a pond with a heavy algal mat. This is because algae consume dissolved oxygen through respiration, and the more algae present in the pond, the greater the demand for oxygen. Algal mats also prevent oxygen from diffusing into the water from the atmosphere, further decreasing the concentration of dissolved oxygen. In contrast, clear ponds allow for more oxygen to diffuse into the water and have lower demand for oxygen due to a lower concentration of algae.
2. In aquatic environments, many organisms respire, including fish, bacteria, and plants. Fish and some other aquatic animals use gills to extract oxygen from the water, while bacteria and some plants undergo aerobic respiration to obtain energy. Some organisms, like algae, undergo photosynthesis to produce oxygen as a byproduct. However, the process of respiration generally consumes more oxygen than is produced by photosynthesis, leading to a net decrease in the concentration of dissolved oxygen in the water.
3. Decomposition activity in aquatic environments is primarily carried out by bacteria and fungi. These organisms break down organic matter, such as dead plants and animals, into simpler compounds through the process of decomposition. This process can have significant effects on water chemistry, as it releases nutrients like nitrogen and phosphorus into the water, which can contribute to eutrophication and harmful algal blooms. Decomposition also consumes dissolved oxygen in the water, leading to further reductions in oxygen concentrations and potentially harming aquatic life.

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Answer:

If you were to mix 10 grams of sugar into 200 grams of water, how much will the total mass of the solution be=

If you consider the density of water = 1 (otherwise you can’t solve the problem) you have a total mass of 30 g of which 10 g are sugar and 20 g are water. Therefore the calculation is easy:

% (w/w) of sugar = 10x100/30 = 33.33…%

% (w/w) of water = 20x100/30 = 66.66…%

Polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore the total mass of solution is 210grams.

Solubility shows the extent of solubility of a solute in solvent to make a solution. Solute is substances that is present in small amount. solvent is a substance that is present in large amount. Its SI unit is gram per litre or g/L.

Bond strength affect the solubility of a solute in solvent. weaker the bond strength is, more the solubility is. The weaker bond can be easily broken by water molecule.

mass of solution = mass of solute+ mass of solvent

mass of solute or sugar= 10 grams

mass of solvent or water=200 grams

Substituting the given values we get

mass of solution =10 grams+ 200 grams

mass of solution =210grams

Therefore the mass of solution is 210grams.

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Answer:

I honestly dont know Im not good at chem:( I love your pfp tho so cute<3 Have a nice day

Explanation:

Answer:

Bro I don't know pls bear I am so ungrateful I am a noob

The atomic ratio of carbon to oxygen in carbon monoxide (CO) is 1:1, and the atomic ratio of carbon to oxygen in carbon dioxide (CO₂) is 2:1.

Firstly, we can analyze the decomposition of carbon monoxide (CO) and carbon dioxide (CO₂) to determine the atomic ratios involved.

Let's denote the atomic ratio of carbon to oxygen in carbon monoxide as x, and the atomic ratio of carbon to oxygen in carbon dioxide as y.

According to the given data;

Decomposition of carbon monoxide (CO);

Oxygen produced = 3.36 g

Carbon produced = 2.52 g

We know that the atomic mass of carbon is 12 g/mol, and the atomic mass of oxygen is 16 g/mol. Using these values, we can calculate the number of moles for each element;

Number of moles of oxygen = mass / atomic mass = 3.36 g / 16 g/mol = 0.21 mol

Number of moles of carbon = mass / atomic mass = 2.52 g / 12 g/mol = 0.21 mol

Since the atomic ratio of carbon to oxygen in carbon monoxide is x, we can write the following equation;

0.21 mol C / (0.21 mol O) = x

Simplifying the equation, we have;

x = 1

Therefore, the atomic ratio of carbon to oxygen in carbon monoxide is 1:1.

Decomposition of carbon dioxide (CO₂);

Oxygen produced = 9.92 g

Carbon produced = 3.72 g

Following the same calculations as before;

Number of moles of oxygen = mass / atomic mass = 9.92 g / 16 g/mol = 0.62 mol

Number of moles of carbon = mass / atomic mass = 3.72 g / 12 g/mol = 0.31 mol

Since the atomic ratio of carbon to oxygen in carbon dioxide is y, we can write the following equation;

0.31 mol C / (0.62 mol O) = y

Simplifying the equation, we have;

y = 0.5

Therefore, the atomic ratio of carbon to oxygen in carbon dioxide is 1:0.5, which can be simplified to 2:1.

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--The given question is incomplete, the complete question is

"Missed this? watch kcv: atomic theory; read section 2.3. you can click on the review link to access the section in your text. carbon and oxygen form both carbon monoxide and carbon dioxide. when samples of these are decomposed, the carbon monoxide produces 3.36 g of oxygen and 2.52 g of carbon, while the carbon dioxide produces 9.92 g of oxygen and 3.72 g of carbon. Calculate the atomic ratio of carbon to oxygen in carbon monoxide, and carbon dioxide."--

Mass of tin = moles of tin x molar mass of tin

Mass of tin = 0.020 mol x 118.7 g/mol

Mass of tin = 2.37 g

Therefore, the mass of tin in the chemical reaction is 2.37 g.

If tin is heated, it cracks. This is caused by crystals rubbing against each other. This characteristic crackle is heard if a piece of tin is simply bent. Tin is very malleable and ductile.

Some properties of tin is that it amphoteric. On reacting with both strong bases and strong acids with the evolution of hydrogen occurs. With sodium hydroxide solution, tin forms Na2[Sn(OH)6]. The reaction with acids is slow in the absence of oxygen.

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Answer:

It would tend to lose two electrons and form a +2 ion. Potassium is in the first column and therefore has 1 electron in its outermost shell. It would tend to lose one electron and form a +1 ion.

Thr IUPAC or systematic name for the compound given from the task above is an organic compound known as undecane.

Organic compounds simply refers to those groups of chemical substances which contains carbon and hydrogen. All organics substances within their respective homologous families has the same general characteristics. From the task given above, it contains 11 carbons atoms which is bonded to 24 hydrogen atoms. That is, why the systematic name of the compound C11H24 is undecane.

Homologous series is a family of organic compound which follows a regular pattern and in which successive members differs from one another by the molecular formula of CH₂. Below are some classes of homologous families:

In conclusion, the compund CCC(C)CC(C)C(C)CC given in the problem above belongs to an alkane family.

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Answer:

here is the answer

tell me is it helpful

Answer:

c

Explanation:

because potential energy is created with the position of a body when you pick up something the thing will have stored energy which is transferred from you so the stored energy is potential energy created by the position of a body that when you see over your head you scared of that thing not to bit you because it has stored energy if you see the thing already failed on the ground you wouldn't scared of that because the enery is already gone

Hope help you

The molar masses of Mg and Fe are:

Magnesium oxide:

Mass of oxygen = 1

Mass of magnesium = 1.5

Molar mass of magnesium = (1.5 / 1) × 16 = 24

Iron oxide:

Mass of oxygen = 1

Mass of iron = 3.5

Molar mass of iron = (3.5 / 1) × 16 = 52

The accepted molar masses of Mg and Fe are 24.305 g/mol and 55.845 g/mol, respectively. The values I obtained are slightly different from the accepted values, but the difference is within experimental error.

There are a few possible reasons for the differences between the values obtained and the accepted values. One possibility is that the compounds used were not pure. Another possibility is that an error was made in calculations. Finally, it is also possible that the accepted values are not accurate.

To account for the differences, repeat the experiment with more accurate measurements and a purer sample of the compounds. Also check the accepted values to make sure they are accurate.

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Answer: The number of electrons held in sub-level l = 3 can be, 14 electrons.

Explanation:

The number of electrons held in sub-level l = 3 can be, 14 electrons

Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...

Magnetic Quantum Number : It describes the orientation of the orbitals. It is represented as . The value of this quantum number ranges from . When l = 2, the value of  will be -2, -1, 0, +1, +2.

Spin Quantum number : It describes the direction of electron spin. This is represented as  The value of this is  for upward spin and  for downward spin.

As we are given that,

(For each sub-shell)

From this we conclude that, there are 7 orbitals and each orbital contains 2 electrons. So, the number of electrons held in sub-level l = 3 are,  electrons.

Hence, the number of electrons held in sub-level l = 3 can be, 14 electrons

Answer:

Also, l=3 is an F orbital which has 14 electrons and 7 orbitals. How many total orbitals are there in sublevel 3? Answer: There are 9 orbitals in 3rd energy level. Explanation: Thus, the third level holds a maximum of 18 electrons: 2 in the s orbital, 6 in the three p orbitals, and 10 in the five d orbitals.

Explanation:

Hope this helps:) Also can I have brainliest?

Answer:

In chemistry, a product is a substance that is formed as the result of a chemical reaction. In a reaction, starting materials called reactants interact with each other.

Explanation:

Answer:140 grams of N2 are made.

Explanation:

15 mol CuO x (1 mol N2 / 3 mol CuO) = 5 moles of N2.

5 mol N2 x (28 g N2 / 1 mol N2) = 140 grams of N2.

The Lewis structure of any compound is the representation of the valence electron shared by the atoms in the form of dots beside the chemical symbol of the atom.

The Lewis structure of formaldehyde is given below.

It has one carbon atom, one oxygen atom and two hydrogen atoms.

All the atom are making covalent bond with the central carbon atom.

If we observe in the Lewis structure, We can see that on sharing the electrons with the adjustment items carbon is able to achieve a stable configuration.

As we can see there is one electron pair in sharing with the two hydrogen atom but there are two electron payers in sharing with the carbon atom.

This is the thing that is intended to be shown by a Lewis structure.

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The placement of electrons in orbitals surrounding an atomic nucleus is known as electronic configuration

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Answer:

Its still a liquid, only it takes form of the bottle.

Explanation:

When you pour a liquid (water) in a bottle, the water is still water but the water takes shape of the bottle. Hope this helps! Let me know if you need clarification.

Answer:

9.05 g

Explanation:

PV=nRT

Use the ideal gas equation. Substitute values.

P = 5 atm

V = 1.50 L

n = ?

R (gas constant) = 0.08206 L-atm/mol-K

T = 20.0°C

*Always convert °C to K.

T = 20.0° + 273 = 293K

Substitute values.

(5 atm)(1.50 L) = n(0.08206 L-atm/mol-K)(293K)

n = (5 atm)(1.50 L) / (0.08206 L-atm/mol-K)(293K)

n = 0.3119335... mol

Convert to grams with the given average mass of air.

0.3119335... mol x (29.0 g/1 mol) = 9.05 g

The empirical formula of chlorofluorocarbon is C₁₅H₁₈ClF₁₂₈

A possible graphic formula for Compound T is:

Cl

|

F--C--C--F

| |

H H

The empirical formula of the compound is determined as follows:

Assume that we have 100 g of Compound T, so the mass of each element in grams can be directly read from the percentages given.

Mass of C = 7 g

Mass of H = 0.66 g

Mass of Cl = 46.4 g / 35.45 g/mol = 1.31 g

Mass of F = 100 g - (7 g + 0.66 g + 1.31 g) = 90.03 g

Next, we can calculate the number of moles of each element:

moles of C = 7 g / 12.01 g/mol = 0.583 mol

moles of H = 0.66 g / 1.008 g/mol = 0.655 mol

moles of Cl = 1.31 g / 35.45 g/mol = 0.037 mol

moles of F = 90.03 g / 18.99 g/mol = 4.740 mol

To obtain the empirical formula, we need to divide the number of moles of each element by the smallest number of moles. The smallest number of moles is 0.037, which corresponds to chlorine:

moles of C = 0.583 mol / 0.037 mol = 15.7

moles of H = 0.655 mol / 0.037 mol = 17.7

moles of Cl = 0.037 mol / 0.037 mol = 1

moles of F = 4.740 mol / 0.037 mol = 128.1

Hence, the empirical formula of the compound is C15H18ClF128

To find the molecular formula, we need to determine the molecular mass of the empirical formula and divide the given molecular mass by the empirical mass to obtain the molecular formula.

The molecular mass of the empirical formula is:

15(12.01) + 18(1.008) + 35.45 + 128(18.99) = 2886.53 g/mol

The given compound has two carbon atoms per molecule, so its molecular mass is twice the molecular mass of the empirical formula:

2(2886.53 g/mol) = 5773.06 g/mol

Therefore, the molecular formula of Compound T is C30H36Cl2F256

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Answer:

v = 3 x 10^8 m/s

Explanation:

λ = 0.03 m

f = 1 x 10^10 Hz

v = ?

v = fλ

v = (1 x 10^10 Hz)(0.03 m)

v = 3 x 10^8 m/s

Answer:

True

Explanation:

Answer:

non-metal

Explanation:

hydrogen is gas

this chart may also help :)

hydrogen is all the first element all the way to the left with the letter H

The resulting temperature change is: 40 degrees c

Here given heat added to system 40kcl

Weight of water 1kg we know the specific heat of water is

S= 4.2 J/g \degree c=1 cal/g\degree c

Q=40kcal  m=1.0 kg=4000 g

We have the heat transfer equation given by

Q= ms\Delta t   where Q=heat energy   m=mass

\Delta t=change in temperature

Put the values and we'll have a change in temperature

\Delta t= \(\frac{Q}{ms}\)

\Delta t= 40 degree C

Temperature is a numerical expression of how hot a substance or radiation is.

There are three different types of temperature scales: those that are defined by the average translational kinetic energy per freely moving microscopic particle, like an atom, molecule, or electron, in a body, like the SI scale; those that rely only on macroscopic properties and thermodynamic principles, like Kelvin's original definition; and those that are not defined by theoretical principles but rather by useful empirical properties of particulate matter.

A thermometer is used to determine temperature. It is calibrated using different temperature scales that historically defined themselves using different reference points and thermometric substances.

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Attack of the Gly64 amide nitrogen on the electrophilic Gln62 carbonyl carbon is most likely what occurs in the initial step of the synthesis of the imidazolinone ring of sgBP.

A chemical species that accepts two electrons to create a covalent bond is known as an electrophile. When an electron-withdrawing group (such as a keto, ester, or nitro group) is conjugated to a double bond, it depletes the -carbon electron, making an electrophile.

Since they lack an electron, electrophiles can accept an electron pair from an electrophile. Carbocations and carbonyl compounds are two examples. An electron-rich species called a nucleophile gives electron pairs to an electron-poor species. Examples include cyanide ions, water, carbanions, and ammonia.

They are atoms that (a) have an incomplete octet and/or (b) have a full or partial positive charge most frequently.

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Answer:

Colloid, any substance consisting of particles substantially larger than atoms or ordinary molecules but too small to be visible to the unaided eye; more broadly, any substance, including thin films and fibres, having at least one dimension in this general size range, which encompasses about 10−7 to 10−3 cm.

Colloid has particles bigger than that of solution and larger than that of suspension. It shows tyndall effect unlike solution and does not settle down unlike suspension. Its particles are between 1 to 1000 manometer.