What is the volume of 238 moles of krypton gas at STP?

Answer:B

Explanation:B can be reversed.

Answer:

Explanation:

Physical properties are characteristics of matter not associated with a change in chemical composition. Identity of the molecules do not change. A physical change is a change in state without changing the composition (e.g., melting wax, freezing water, grinding solids into powders).  Examples: density, color, melting and boiling points, evaporation, odor, taste, hardness, conductivity.

B. Honey dissolving in tea would be a physical change. The honey is not changing chemically but physically as it dissolves in the hot tea.

Answer:

That is correct my dude

Explanation:

Answer: Thomson

Explanation: Thomson proposed the plum pudding model of the atom.

Answer:

The term groundwater refers primarily to underground rivers and lakes

but what r the options tho?

The chemical elements involved are; hydrogen, fluorine, boron and lithium

There are two hydrogen atoms, five fluorine atoms, one boron atom and one lithium atom.

Chemical compounds are represented symbolically by chemical formulas, which reveal the types and amounts of atoms that make up the compound. It is a succinct approach to explain a substance's makeup.

The components of a compound are identified in a chemical formula by their corresponding chemical symbols, which are typically derived from their English or Latin names. The number of atoms of each element in a single compound molecule is indicated by the subscripts that follow each element.

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Answer:

≅ 0.240 grams (3 sig. figs.)

Explanation:

Rxn:   CaCO₃  +          2HCl              => CaCl₂ + H₂O + CO₂

Given:    ?g          45.67ml(0.105M)

                            = 0.04567L x 0.105 mole/L

                            =  0.0048 mole HCl

Rxn ratio for CaCO₃ to HCl is 1:2

∴ moles CaCO₃ consumed = 1/2 of moles HCl used

=> 1/2(0.0048)mole CaCO₃ used = 0.0024 mole CaCO₃

mass CaCO₃ = 0.0024 mole CaCO₃  x  100.09 grams CaCO₃/mole CaCO₃

= 0.23998 grams CaCO₃ (calculator answer)

≅ 0.240 grams (3 sig. figs.)

Answer:

Composition: All hydrocarbons are made up of only two types of atoms: carbon and hydrogen. They are like building blocks that contain carbon and hydrogen stuck together.

Organic Nature: Hydrocarbons are special because they are part of a group of compounds that come from living things or things that were once alive. They have carbon and hydrogen in them, which is what makes them different from other types of compounds.

Explanation:

Stalactites and stalagmites form as ________ precipitates out of the water evaporating in underground caves.

Group of answer choices

hydrochloric acid

sodium bicarbonate

calcium carbonate

sodium chloride

sodium hydroxide

Answer:

calcium carbonate

Explanation:

A stalactite is an icicle-looking mould that is formed by the precipitation of natural minerals as a result of water dripping from the ceiling, hanging from a cave.

A stalagmites in the other hand, grows upwards and is also a mound that is formed by the deposits of minerals gotten by the water dripping on the floor of a cave.

Therefore, stalactites and stalagmites form as calcium carbonate precipitates out of the water evaporating in underground caves.

Answer:

ftb

Explanation:

Answer:

56.88g N2

Explanation:

1 mole of N2 will react to 3 moles of H2

so 6.25 moles of H2 will react to 6.25/3 = 2.03 moles of N2

molar mass of N2 = 2(14.01) = 28.02 g/mol

mass of N2 = 2.03 x 28.02 = 56.88 g

I showed maturity when I turn 13 year old

Answer:

c) Both a) and b)

Explanation:

please mark me brainliest

Answer:

o2

Explanation:

because it shows the property of air

2. Chemical formulas are used to describe the types of atoms and their numbers in an element or compound. The atoms of each element are represented by one or two different letters. When more than one atom of a specific element is found in a molecule, a subscript is used to indicate this in the chemical formula.

3. The main difference between monatomic and polyatomic ions is that monatomic ions are composed of single atoms whereas polyatomic ions are composed of two or more atoms per ion.

4. These are nonmetal elements which have accepted extra electrons. These ions are relatively few in number and are listed below. Monatomic anions are named by taking the root of the element name and applying an -ide ending. Other important simple anions.

5. This is indicated by assigning a Roman numeral after the metal. The Roman numeral denotes the charge and the oxidation state of the transition metal ion. For example, iron can form two common ions, Fe2+ and Fe3+. To distinguish the difference, Fe2+ would be named iron (II) and Fe3+ would be named iron (III).

The heat made by a mixture of gases is less than that produced by solitary gases of hydrogen or oxygen.

The property becomes a solution of a homogeneous mixture. Some of the effects of gas mixtures are easy to control. if we know the composition of the gases in the mix. In gas mixtures, all components in the gas phase can be used separately. The atmosphere is a mixture of different gases. The part, usually present in solution, first has to be atomized in a flame. Premixed combustion flame, a mixture of fuel and oxidant gas, and diffusion. compared to liquid streams, is relatively simple because the bulk characterization of a single phase is implicit. However, when gas. The heat produced by a mixture of gases is less than that produced by solitary gases. of hydrogen or oxygen.

so we can conclude that the flame appears yellow if there are impurities in the air whereas a pure hydrogen gas flame will not produce any smoke.

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Answer:If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid. The most energetic particles at the surface escape from the surface of the liquid as a vapour as it gets warmer. Liquids evaporate faster as they heat up and more particles have enough energy to break away.

Explanation:

Answer:

please translate in english

Answer:

uh

Explanation:

5+x/3=9

=x/3=9-5

=x=12

Answer:

D. Data that support a hypothosis

Explanation:

Evidence needs to support a claim

Answer:

data that support a hypothesis

For monosaccharides to cyclize, an alcohol group must attack a carbonyl group, the  carbon of linear pento-ketose has the reactive carbonyl is the carbon number 1.

The monosaccharide is a single unit sugar. Recall that sugars could have cyclic or open chain structures. It is possible for the compound to exists in either the cyclic or the open chain structure.

Now, for monosaccharides to cyclize, an alcohol group must attack a carbonyl group, the  carbon of linear pento-ketose has the reactive carbonyl is the carbon number 1.

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The value of the solubility product constant (Ksp) for the salt AB at 25°C is 2.60 x 10⁻³.

The solubility product constant (Ksp) is the equilibrium constant for the dissolution of a sparingly soluble salt in water. It is given by the expression Ksp = [A⁺][B⁻] where [A⁺] and [B⁻] are the molar concentrations of the cations and anions in solution, respectively.

In this case, the balanced equation for the dissolution of the salt AB is: AB(s) ⇌ A⁺(aq) + B⁻(aq) We know that at 25°C, only 0.0510 mol of the salt AB is soluble in 1.00 L of water. This corresponds to a molar solubility of

s = 0.0510 mol / 1.00 L = 0.0510 M

At equilibrium, the molar concentration of A⁺ and B⁻ will also be 0.0510 M. Therefore, the value of Ksp for the salt AB at 25°C can be calculated as: Ksp = [A⁺][B⁻] = (0.0510 M) * (0.0510 M) = 2.60 x 10⁻³.

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The formula for lithium hydrogen phosphate is Li2HPO4.

What is lithium hydrogen phosphate (Li2HPO4)?

Lithium hydrogen phosphate (Li2HPO4) is a chemical compound that contains the elements lithium, hydrogen, phosphorus, and oxygen. It is an ionic compound and a salt of phosphoric acid.

Lithium hydrogen phosphate is commonly used in the production of lithium-ion batteries and as a source of lithium ions in chemical reactions. It is also used in the synthesis of various other lithium compounds. In addition, lithium hydrogen phosphate has potential applications in the field of biomedical engineering as a material for bone tissue engineering and drug delivery.

What is an ionic compound?

An ionic compound is a type of chemical compound formed by the combination of positively charged ions (called cations) and negatively charged ions (called anions) through electrostatic attraction. The cations and anions are held together by ionic bonds, which are formed by the transfer of electrons from the cation to the anion. Ionic compounds are typically solids at room temperature and have high melting and boiling points. Examples of ionic compounds include sodium chloride (NaCl), magnesium oxide (MgO), and calcium carbonate (CaCO3).

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Answer: 177.23 g.

Explanation:

the volume of the aluminum bar is

1.7 cm x 3.0 cm x 12.9 cm

= 65.61 cm^3

2.7 g/cm^3 x 65.61 cm^3

177.23g

Answer:

Potassium

Explanation:

Metals in decreasing order of their reactivity are - Potassium, Sodium, Lithium, Barium, Strontium

Answer:

B

Explanation:

I had same question

The properties of a natural resource that make it useful for humans as a material or energy source is the ability to convert mass into energy and vice versa.

The expression natural resources make reference to all types of matter and energy extracted from nature that can be used to produce goods and services.

Some examples of natural resources include for example irreversible resources such as fossil fuels (i.e., oil, or coal, gas, minerals such as metals, rocks, etc) as well as those based on the use of reversible energy such as eolic air energy, solar radiation or sunlight, soil and hydric resources or water.

Therefore, with this data, we can see that natural resources can be defined as any material and or energy obtained from nature that may be irreversible or reversibly used to produce goods and services.

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Answer:

Percentage of Ba = 52.5%

Explanation:

We'll begin by calculating the molar mass of Ba(NO3)₂. This can be obtained as follow:

Molar mass of Ba(NO3)₂ = 137 + 2[14 +(16×3)]

= 137 + 2[14 + 48]

= 137 + 2[62]

= 137 + 124

= 261 g/mol

Next, we shall determine the mass of Ba in Ba(NO3)₂. This can be obtained as follow:

Mass of Ba in Ba(NO3)₂ = 137 g/mol

Finally, we shall determine the percentage of Ba in Ba(NO3)₂. This can be obtained as follow:

Percentage of Ba = mass of Ba / mass of Ba(NO3)₂ × 100

Percentage of Ba = 137 / 261 × 100

Percentage of Ba = 13700 / 261

Percentage of Ba = 52.5%

Thus, the percentage of Ba in Ba(NO3)₂ is 52.5%

Answer:

Direct-air capture

Explanation:

To understand the technology I'm about to explain, I'll model it to something familiar. As you know, the process of  photosynthesis is where trees and plants use sunlight, water, and carbon dioxide to create energy for themselves, and release oxygen as a byproduct. Direct- air capture is exactly like this. Its pulls in air and then through a range of similiar chemical reactions, it extracts the carbon dioxide from it while returning the rest of the air to the surrounding environment. Except, the Direct-air capture does this at a much faster rate than nature does. The direct-air capture uses a ginormous fan that pulls air in which then passes over plastic surfaces that have potassium hydroxide solutions covered over them. The potassium hydroxide solution chemically binds with the carbon dioxide molecules, removing them from the air and trapping them in the liquid solution as a carbonate salt. The carbon dioxide is then contained where it is compressed and purified and then stored for later use.