Please help ASAP
Which of the following describes a solute?
A.
a substance suspended in a liquid
B.
a substance dissolved in a solution
C.
a substance that dissolves another substance in a solution
D.
a substance that forms a colloid in a liquid

Answer:

The heliocentric theory was better supported by data explaining the rotation of the planets and other bodies in the solar system.

Explanation:

False.

Radiation itself does not typically have a green glow, intense heat, crackling sound, or ammonia smell. These descriptions do not accurately represent the properties of radiation.

The emission of energy in the form of particles or electromagnetic waves is referred to as radiation. Our senses cannot immediately notice it. Radiation is measured and detected using specialized apparatus and detectors.

Alpha particles, beta particles, gamma rays, and X-rays are a few examples of different forms of radiation that have unique characteristics and may be identified with the right tools. For instance, ionizing radiation is typically detected using Geiger-Muller counters or scintillation detectors, whereas radiation exposure is measured using dosimeters.

For precise radiation risk identification and protection, it's crucial to rely on the right detection tools and follow safety procedures.

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Answer:

The troposphere is the lowest layer of Earth's atmosphere, and is also where nearly all weather conditions take place. It contains 75% of the atmosphere's mass and 99% of the total mass of water.

Explanation:

Answer:

107.9

Explanation:

Answer:

A. metals and non-metals

Answer:

Metals-Non-Metals

Explanation:

You see, that is the answer because when the asnwer.

\(\geq \geq \geq \geq \geq \geq \geq \geq \geq \geq \geq \geq \geq \geq \geq \geq \geq \geq \geq \geq \geq\)

Answer:

I think you mean 0.025 M and this is the answer

Explanation:

Answer:

Ionic

Explanation:

Mg has 2 electron in it's outermost orbit, by donating this two electron to Sulfur it get stable mg 2+ electronic configuration while sulfur has 6 electron in it's outermost shell ,so sulfur accept this 2 electron and complete it's octet and become s2–.

The oxides of Cr(VI) and Mn(VII) are commonly used as oxidizing agents in organic synthesis.

An oxidizing agent is a substance that gains or accepts or receives" an electron from a reducing agent in a redox chemical reaction.

In other words, an oxidizer is any substance that oxidizes another substance.

Fluorine (F) is the most powerful oxidizing agent of all elements, and the other Halogens are also effective oxidizers.

Thus, in organic synthesis, the oxides of Cr(VI) and Mn(VII) are commonly used as oxidizing agents.

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A brownfield is a property, the expansion, redevelopment, or reuse of which may be complicated by the presence or potential presence of a hazardous substance, pollutant, or contaminant.

A “brownfield” generally refers to a parcel of land that was previously used for industrial purposes and which is contaminated by low concentrations of hazardous chemicals.

A brownfield development requires more work and investment upfront: existing structures may have to be demolished, materials must be removed, and developers may have to engage in extensive environmental cleanup to remove pollutants.

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Answer:

Radioactive elements

Stable

Explanation:

Radioactive elements that have a longer half-life are more stable than those that a shorter half-life.

Half-life is the time taken for half of a radioactive element to decay by half of its original composition.

Now, if a substance have a long half-life, it is more stable and takes time to break down. For atoms with a short life, they are highly unstable and breaks down readily and easily.

Answer:

3 × 10¯¹⁰

Explanation:

9×10² ÷ 3×10¹²

The above expression can be evaluated as follow:

9×10² ÷ 3×10¹²

Recall:

3² = 9

3¹ = 3

Therefore,

9×10² ÷ 3×10¹² = 3²×10² ÷ 3¹×10¹²

Recall:

y^m ÷ y^n = y^(m – n)

Therefore,

3²×10² ÷ 3×10¹² = 3²¯¹ × 10²¯¹²

= 3¹ × 10¯¹⁰

Recall:

y¹ = y

Therefore,

3¹ × 10¯¹⁰ = 3 × 10¯¹⁰

Therefore,

9×10² ÷ 3×10¹² = 3 × 10¯¹⁰

Explanation:

option option B is the correct answer of given statement helium-4(He)=2

If a chemical reaction has a negative AH and a negative AS, then it will be spontaneous at low temperatures and non-spontaneous at high temperatures.

The spontaneity of a reaction is determined by the sign and magnitude of the change in Gibbs free energy (G). The equation for calculating Gibbs free energy is:

ΔG = ΔH - TΔS

where H is the change in enthalpy, T is the temperature in kelvins, and S is the change in entropy.

When G is negative, the reaction is spontaneous.

When G is positive, the reaction is non-spontaneous.

When G is zero, the reaction is at equilibrium. If a chemical reaction has a negative H and a negative S, then the formula for Gibbs free energy becomes:

G = H - TS = (-) - T(-) When T is low, -TS will be small, so G will be negative, and the reaction will be spontaneous.

When T is high, -TS will be large, so G will be positive and the reaction will be non-spontaneous.

Therefore, the answer is D

It will be spontaneous at low temperatures and non-spontaneous at high temperatures.

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Answer:

a

Explanation:

The phrase  most accurately defines physiology is option A the study of how parts of the body function and work together.

The word "physiology" means "the scientific investigation of the mechanics and operations of a living system.  Physiology is a branch of biology that focuses on how animals, organ systems, specific organs, cells, and biomolecules perform the chemical and physical processes necessary for a living system to operate.  

The discipline can be separated into medical physiology, animal physiology, plant physiology, cell physiology, and comparative physiology in accordance with the types of organisms.

Physiological changes can have an effect on how people think. Examples of this include the results of specific drugs or the presence of dangerous amounts of chemicals.

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Answer: In its natural condition, a pure element

There are 60 grams in 3 moles of HF.

One mole of a substance contains a specific number of particles, called Avogadro's number. This number is approximately 6.022 × 10²³ particles per mole.

Therefore, the mass of one mole of a substance can be determined from its molar mass.

For example, the molar mass of HF (hydrogen fluoride) is approximately 20 g/mol (1.008 g/mol for hydrogen + 18.998 g/mol for fluorine).

Therefore, one mole of HF weighs 20 grams.

To determine the mass of 3 moles of HF, multiply the molar mass by the number of moles:3 mol HF × 20 g/mol HF = 60 g HF

Therefore, there are 60 grams in 3 moles of HF.

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Answer:

Your answer should be 53%

I'm very sorry if I'm wrong I have not done this in forever

Explanation:

No explanation

Answer:

carbon-14..............

The atom which has the smallest number of neutrons is carbon-14 as it has  the least atomic number.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer:

compact fluorescent light

Answer:

SEE EXPLANATION

Explanation:

If i refer to the bottle at the left hand side as A and the bottle at the right hand side as B. I can say that the bottle A contains solutes which are more soluble than the solutes in bottle B. consequently, A has a lower vapour pressure than B.

We can also see that the pressure in A is much higher than in B(as indicated by the length of the arrows). The higher the pressure, the greater the solubility of the gas.  Henry's Law states that: The solubility of a gas in a liquid is directly proportional to the pressure of that gas above the surface of the solution.

Again let me call  the beaker on the left A and the beaker on the right B. We can see that the beaker on the left contains 10 ml of solution while the beaker on the right contains 50 ml of solution. It follows that beaker A contains a more concentrated solution since that much amount of solute is contained in a smaller volume than in beaker B as shown in the image.

The correct answer choice which is the most common use of polyvinyl chloride is: plastic pipes. Option C

Below are some other uses of polyvinyl chloride:

Polyvinyl Chloride (PVC) is polymer which is used in various applications including widespread use in building, transport, packaging, electrical and healthcare applications.

So therefore, the most common use of polyvinyl chloride is in the making of plastic pipes

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Correct answer is  A and B. The reactant(s) in the chemical equation A + B ⇔ C + D would be option C, A and B.

A chemical reaction's reactants are the substances that take part in it. A chemical reaction is the term used to describe how atoms, which are the basic building blocks of matter, rearrange themselves to create new combinations. Reactants are raw materials that react with one another.

In the chemical equation A + B ↔ C + D, the reactants are the chemicals that participate in the reaction to form the products. In this case, the reactants are A and B.  

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Answer:

HEY RUBY!! WE ARE BOTH FAILING!!!!!!!

Explanation:

#&-78$#'☠️

Answer:

1.59x10⁻¹⁰m

Explanation:

To solve this question we must know that the length of the cubic cell, X, is equal to:

X = √8 * R

Where R is the atomic radius of germanium

And that in 1 unit cell there are 4 atoms of germanium.

To solve this question we must find the mass in 1 unit cell, with this mass we can find the volume of the cube and the length. With the length we can know the atomic radius:

Mass in 1 unit cell -Molar mass Ge = 72.64g/mol:

4 atoms Ge * (1mol / 6.022x10²³ atoms) = 6.64x10⁻²⁴ moles Ge

6.64x10⁻²⁴ moles Ge * (72.64g / mol) = 4.825x10⁻²²g Ge

Volume unit cell:

4.825x10⁻²²g Ge * (1cm³ / 5.32g) = 9.07x10⁻²³cm³

Length unit cell:

∛9.07x10⁻²³cm³ = 4.49x10⁻⁸cm * (1m / 100cm) = 4.49x10⁻¹⁰m

Atomic radius Ge:

4.49x10⁻¹⁰m / √8 =

The range of -10°F to 0°F is the ideal temperature range for ice-making because it promotes faster freezing time and produces high-quality ice.

The process of ice-making usually occurs in the temperature range of -10°F to 0°F. Ice making is the process of making ice from water. The process is usually used in refrigerators, air conditioning units, and in manufacturing industries. During this process, water is changed from its liquid state to a solid state through a cooling process. The ice-making temperature range is important because it determines how long it will take for water to freeze into ice at a given temperature range. The colder the temperature, the quicker the ice-making process. Therefore, the range of -10°F to 0°F is the ideal temperature range for ice-making because it promotes faster freezing time and produces high-quality ice.

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Answer:300k=3L

             700k=x

cross multiply

300x=2100; x=7L

Explanation:

Answer:

7L

Explanation:

Glucose is the simplest sugar and carbohydrate that provides energy. The simplified model of glucose (C₆H₁₂O₆) shows carbon, hydrogen, and oxygen atoms linked together.

Glucose is an example of a carbohydrate macromolecule that is further classified as a monosaccharide. They are crystalline and fundamental units of carbohydrates.

The molecular formula of glucose is C₆H₁₂O₆ and the mass is 180.156 g/mol. It is an aldohexose that contains an aldehydic functional group. In its structure, there are six oxygen atoms, six carbon atoms, and twelve hydrogen atoms.

Therefore, the glucose molecule is composed of C, H, and O.

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Among the given reactions, the reaction closest to having a ΔS (change in entropy) of zero at 25 degrees Celsius is reaction B: H2 (g) + I2 (s) -> 2HI (g).

Entropy is a measure of the disorder or randomness of a system. A reaction with a ΔS value close to zero indicates minimal change in entropy. To determine the relative ΔS values for the reactions, we consider the following factors:

A) C2H4 (g) + Br2 (l) -> C2H4Br2 (l)

This reaction involves the formation of a liquid from a gas and a liquid, which generally increases entropy.

C) N2 (g) + O2 (g) -> 2NO (g)

This reaction involves the formation of gas molecules from gas molecules, resulting in an increase in entropy.

D) CH3CHO (g) + 5/2O2 (g) -> 2CO2 (g) + 2H2O (g)

This reaction involves the formation of gas molecules from gas molecules, resulting in an increase in entropy.

E) 2NO (g) + O2 (g) -> 2NO2 (g)

This reaction involves the formation of gas molecules from gas molecules, resulting in an increase in entropy.

B) H2 (g) + I2 (s) -> 2HI (g)

In this reaction, a solid reacts with a gas to form a gas, resulting in a decrease in entropy.

Since reaction B involves a decrease in entropy, it is the closest to having a ΔS value of zero at 25 degrees Celsius.

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