How many grams of lithium will combine with 20 grams of sulfur to form the compound li2s?

Answer:

VII'th group, negative ion

Explanation:

Usually fluorine is located in the seventh(VII) group as fluorine has 7 electrons in it's outer shell with chemical symbol "F"
Fluorine has 7 electrons in it's outer shell therefore, it needs one more electron to get the noble gas configuration. So more electrons means negative ion.

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1 mols of Aluminium ion forms 1 mol aluminium phosphate

Molar mass of AlPO_4

Moles of AlPO_4

Moles of Al3+=57.5µmol

The compound that is more soluble in an acidic solution than in a neutral solution is PbI2.

The solubility of compounds in water depends on the pH of the solution. The acidity or basicity of the solution alters the solubility of the compound. The solubility of a compound in water is determined by the balance between its chemical reactions with the solvent and its ionic concentration. As a result, solubility varies with pH since different conditions alter the nature and concentration of ions and molecules present in a solution.PbI2 is more soluble in an acidic solution than in a neutral solution because it is a basic salt.

When dissolved in an acidic solution, the basic salt reacts with H+ ions to form H2PbI4. The solubility of H2PbI4 is higher than PbI2, making it more soluble in acidic solutions than in neutral solutions. On the other hand, the other given options are less soluble in acidic solutions as compared to neutral solutions: AgCl is insoluble in both acidic and neutral solutions. Therefore, it is not soluble in an acidic solution.

HgBr2 is more soluble in a neutral solution because it is a neutral salt. It has no acidic or basic properties, so it dissolves more readily in a neutral solution than in an acidic solution.BaCO3 is more soluble in a neutral solution because it is a basic salt. It reacts with H+ ions in acidic solutions to produce CO2 gas and water. Therefore, it is less soluble in acidic solutions than in neutral solutions. In conclusion, PbI2 is the compound that is more soluble in an acidic solution than in a neutral solution.

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Answer:

\(thank \: yo\)

A usual type of controlled experiment balance a control group against an experimental group.

The parts of the experimental design are control, free variable, dependent variable, constant variable, randomly assignment, and manipulation. These are the components is also help you explain if the experiment is valid. A controlled experiment is an experiment that set side by side the effect of one manipulated variable on a group that collects no treatment. controlled variables. the element that should be kept matching in both the nursing group and the non-treated group. True experiments have four elements: artifices, control, random or assignment, and random selection. The main of these elements is manipulation and control. Manipulation means that something is purposefully changed by scientists and the environment.

so we can conclude A common type of controlled experiment compares a control group against an experimental group.

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Answer:humans have put ridiculous amounts of carbon dioxide into the atmosphereThese events are linked to the mass burning of fossil fuels to meet an increase in human demand

So the answer is True

Explanation:

Burning fossil fuels, such as coal and oil, has increased the quantity of greenhouse gases in our atmosphere since the Industrial Revolution began around 1750.

Atmosphere is defined as a layer of gas that surrounds a planet and is kept there by the gravitational pull of the planetary body. The atmosphere of Earth includes five primary layers and a number of minor ones.

Industrial revolution is defined as the transition of an economy based on agriculture and handicrafts to one driven by industry and machine production. The causes of industrial revolution are the advent of capitalism, European imperialism, efforts to mine coal, and the effects of the Agricultural Revolution are some of the factors that historians have recognized as contributing to the Industrial Revolution.

Thus, burning fossil fuels, such as coal and oil, has increased the quantity of greenhouse gases in our atmosphere since the Industrial Revolution began around 1750.

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Explanation:

freezing point depression is a phenomenon that describes why adding a solute or solvent results in the lowering of the freezing point of the solvent

Sand was accidentally turned into glass by the Phoenician seafarers by the use of natron.

SiO2 is the primary component of flat glass (silica sand). This has a high melting point of around 1700 degrees Celsius, and in this form it resembles syrup on a very cold day.

Glass composed of borosilicate is a leader in general analytical applications due to its straightforward composition, excellent chemical resistance, and strong thermal shock capabilities. The advantages of borosilicate glass are all present in 96% silica glass, which also has outstanding thermal shock resistance and high service temperature characteristics.

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Ksp for BaSO4 is 9.70 x 10^-11. Represents the equilibrium constant for the dissolution of BaSO4 in water at 25°C, indicating the extent to which solid BaSO4 dissociates into Ba2+ and SO42- ions in saturated solution.

To calculate Ksp for BaSO4, we need to use the solubility data and the stoichiometry of the balanced equation. The balanced equation for the dissolution of BaSO4 in water is: BaSO4(s) ⇌ Ba2+(aq) + SO42-(aq). From the solubility data given, we know that the solubility of BaSO4 is 0.0023 g/L.

To calculate Ksp, we need to determine the concentrations of Ba2+ and SO42- ions in the saturated solution. Since the stoichiometry of the balanced equation is 1:1 between BaSO4 and Ba2+ or SO42-, the concentration of Ba2+ and SO42- in the saturated solution will also be equal. Let's assume the concentration of Ba2+ and SO42- in the saturated solution is x mol/L.

Then, the solubility product expression for BaSO4 can be written as: Ksp = [Ba2+][SO42-] = x * x = x^2. Since the solubility of BaSO4 is 0.0023 g/L, we need to convert it to mol/L. The molar mass of BaSO4 is 233.39 g/mol, so the solubility in mol/L is:

0.0023 g/L / 233.39 g/mol = 9.85 x 10^-6 mol/L

Now, we can substitute this value into the Ksp expression:

Ksp = (9.85 x 10^-6 mol/L)^2 = 9.70 x 10^-11

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Coefficient 2 should be placed in the equation before the nitric acid in the reactant so that the chemical reaction becomes balanced.

The given chemical reaction is,

Zn + HNO3 --------> Zn (No3)2 + H2

Here, the elements Hydrogen, Nitrogen, and Oxygen are unbalanced.

These elements are altogether found in HNO₃ on the reactant side and are found as nitrate and hydrogen gas on the product side.

To balance the equation, the coefficient 2 is to be added in the reactant side so that 2 moles of Hydrogen, Nitrogen, and Oxygen would be balanced with 2 moles of Nitrate and two moles of Nitrogen.

On adding 2 on reactant side, we get

Zn + 2HNO3 -----------> Zn(NO3)₂ + H₂

This gives us a balanced equation and thus the equation could be balanced this way.

Therefore, coefficient 2 is to be added to make the equation to be balanced.

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Copper(i) iodide added to table salt as a dietary source of iodine. 0.238mm of CuI are contained in 1.00 lb (454 g) of table salt containing 0.0100% CuI.

Mass per mole is a definition of molar mass. Molar mass is the total mass of all atoms in substance that makes up a mole. It is measured in gram-per-mole units.

In the case of single elements or individual atoms, the molar mass is just the element's mass given in atomic mass units. Atom's atomic mass and molar mass are exactly equal.

Given,

Mass of table salt is 1.00 lb = 454 g

Copper(I) Iodine (CuI) present in the table is 0.0100% by mass or

CuI present in the 1 pound of salt = 0.01% of 454 g = 0.0454 grams

Now,

Molar mass of CuI = 63.54 grams + 126.90 grams

Molar mass of CuI = 190.44 grams

∴ number of moles of CuI present in 1 pound salt = Mass / Molar mass

Moles of CuI= 0.0454 / 190.44

Moles of CuI = 2.38 × 10⁻⁴ moles

Moles of CuI = 0.238 millimoles

∴ Moles of CuI present is 0.238mm.

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Answer:

Why Dissolving Salt Is a Chemical Change

Therefore, dissolving salt in water is a chemical change. The reactant (sodium chloride, or NaCl) is different from the products (sodium cation and chlorine anion). Thus, any ionic compound that is soluble in water would experience a chemical change.

Explanation:

Answer:

Average atomic mass of chlorine =

100

75.77×34.9689+24.23×36.9659

=35.45 g/mol.

Answer:

35.4846.

Explanation:

35 * 0.7577 + 37*0.2423

It would need more titrant than benzoic acid, which would affect how much titrant is added.

In comparison to ethanol, chloroform, and the other three pure solvents, toluene has a lower solubility, while ethanol and chloroform have higher solubilities. At increasing ethanol concentration, benzoic acid becomes more soluble in binary mixes. Benzoic acid becomes more soluble as the temperature rises.

The solubility of benzoic acid in water only becomes noticeably better with the addition of 0.50 mol/L of sodium salicylate to the aqueous solution. The nomenclature for this quantity is the Minimum Hydrotrope Concentration (MHC)32.

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The required force is 280 N.

We must subtract our individual forces in order to calculate the net force.

In general, whenever forces act on an object in opposite directions-the net force is equal to the difference between the two forces.

To calculate the net force, one force is subtracted from the other. therefore, here

325 N is force 1 to the right.

45 N is force 2 to the left.

Force 1 - Force 2 is the net force.

net force= 325N - 45N

net force= 280 N

So the required force is 280 N.

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The net force of the runner would be 280 N.

Hope this helps! Also, if you need help with the other questions regarding this assignment, feel free to check out the study set I made on Quizlet. Thanks and good luck!

Quizlet - "Unit 6: Lesson 2 Newton's First Law QC"

h t t p s : / / q u i z l e t. c o m / 7 3 7 7 5 9 5 5 5 / u n i t - 6 - l e s s o n - 2 - n e w t o n s - f i r s t - l a w - f l a s h - c a r d s / ? n e w

Answer:

d

Explanation:

Answer:

Chemical Family means a group of elements in the Periodic Table or, more commonly, compounds that share certain physical and chemical characteristics and have a common name.

A period in the periodic table is a row of chemical elements.

metalloid is an element (e.g. arsenic, antimony, or tin) whose properties are intermediate between those of metals and solid nonmetals or semiconductors.

The semi-crystalline polymer of the same composition, a completely amorphous polymer is expected to the crystallites scatter light.

Crystallization of polymers is a manner associated with the partial alignment of their molecular chains. these chains fold together and shape ordered areas called lamellae, which compose larger spheroidal systems named spherulites.

Semi-crystalline plastics can be taken into consideration for a selection of applications. choosing a plastic material for use in excessive temperature surroundings calls for a cautious assessment of fabric residence information. View our interactive Thermoplastics Triangle to evaluate substances.

Polyethylene is a partially crystalline solid whose residences are exceedingly dependent on the relative content of the crystalline section and amorphous section, i.e., crystallinity. Polyethylene is a polymer polymerized from monomeric ethylene.

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Answer:

read it first

Explanation:

and when your done you'll get the answer of variable

All of the above forces (ionic interactions, H-bonding, van der Waals forces, metal ions, and disulfide bonds) play a role in stabilizing the 3-dimensional structure of proteins. Thus, the correct answer is Choice 6 of 6: all of the above.

Ionic interactions occur between positively and negatively charged amino acid residues, which helps to maintain the overall charge balance of the protein. H-bonding involves the sharing of electrons between atoms, and helps to hold the protein's secondary and tertiary structures in place. Van der Waals forces are relatively weak interactions between atoms, but they can contribute to the stability of the protein by helping to hold the atoms in place. Metal ions can also play a role in stabilizing the protein by binding to specific amino acid residues. Disulfide bonds form between cysteine residues and help to hold the protein's tertiary structure in place.

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Explanation:

Noble gases are odorless, colorless, nonflammable, and monotonic gases that have low chemical reactivity. The full valence electron shells of these atoms make noble gases extremely stable and unlikely to form chemical bonds because they have little tendency to gain or lose electrons. So, noble gases cannot participate in ionic bond formation.

Answer:

Because they can't!

Explanation:

For ionic bonds, ions are needed to be made which are made to form a stable outer shell octet of electrons of each atom to gain atomic stability. The noble gases don't need to form ions since they already have the octet of electrons in their outer shells. If they don't form ions, they don't form ionic bonds too.

This is one of the reasons why noble gases are unreactive.

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2.05L  is the balloon's volume after 0.850 g of He has leaked out through a small hole

What does the ideal gas law mean?

The rule that states that the sum of a gram's worth of an ideal gas's pressure, volume, and universal gas constant is equal to the sum of the gas's absolute temperature and universal gas constant.

There are four guiding presumptions for a gas to be "ideal": The gas particles' volume is minuscule. There are no intermolecular forces (attraction or repulsion) between the equal-sized gas particles and other gas particles. According to Newton's Laws of Motion, the gas particles travel at random.

V∝n

V₁/n₁m= V₂/n₂

V1 =  13.2L

V2 = ?

n1 = 4/1.92 =  2.08moles

n2 = 4/12.35 =  0.323

V2 =  V1n2/n1

     = 13.2*0.323/2.08

     = 2.05L  

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Verify RAM modules compatibility.

If a customer's computer has four memory slots but the installed RAM modules are operating in single-channel mode, the first thing to do is to check if the RAM modules are compatible with each other. If they are not, replacing them with a matching pair of RAM modules could solve the problem.

If the RAM modules are compatible, the next step would be to check if they are installed correctly. The modules should be installed in the correct slots, usually in pairs, to enable dual-channel mode. Refer to the computer's user manual to determine the correct installation procedure.

If the RAM modules are installed correctly and are compatible with each other, the issue could be with the motherboard or the BIOS settings. The customer should check the BIOS settings to ensure that dual-channel mode is enabled. If it is not, enabling it in the BIOS should solve the problem.

If the issue persists, the customer may need to consult a professional or the computer's manufacturer for further assistance.

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Answer:

C

Explanation:

Got it right on a test

Answer:

Gram kilogram and tonne is the answer

Answer:

translate? ill edit this later

Explanation: