Dissolving salt in fresh water to make salt water is Chemical or Physicals

Answer:

Solution and the liquid state

Explanation:

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Answer:

Melting: one substance is involved and the liquid and solid are the same material.

To melt something heat is essential.

Dissolving: involves two materials;the resulting solution is a mixture of two substances.

The dissolved substance is still present in the solution even though it cannot be seen.

Explanation:

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Answer:

magnesium

Explanation:

magnesium is in Group 2, in the periodic table. this means that it has 2 valence electrons. the less valence electrons an element or atom has, the more reactive. Selenium has 6 valence electrons. as a result, Mg is more reactive

Answer: c

Explanation:

i think the answer is c

Answer:

I believe 2

Explanation:

Primary parabolic reflector and the sub reflector

Answer:

it should be 0.01

Explanation:

Explanation:

Both cobras and rattlesnakes are dangerous snakes. Both snakes deliver fatal bites to humans. but their venoms are of different type.

Cobras are long slender snakes, they usua grow between 4 and 6 feet, although they are other species which grow up to 18 to 24 feet. a Cobra can be identified with its most  common features 1.hood behind their heads.

While a rattle snakes gives a warning sign when approaching this sound is known as rattle.

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 136 g

volume = 12 cm³

We have

[tex]density = \frac{136}{12} = \frac{34}{3} \\ = 11.333333...[/tex]

We have the final answer as

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Answer:

d

Explanation:educated guess

Answer:

Density = (3.33kg or g)/cm³(since you didn't state the unit of the mass)

Explanation:

volume = length × breath × height

let's take it as,

length = 2.0cm

breath = 3.0 cm

height = 2.0 cm

mass = 40 kg or g (since you didn't state the unit of the mass)

volume = ?

volume = length × breath × height

volume = (2 × 3 × 2)cm

volume = 12 cm³

Density = mass /volume

40kg or g/12cm³

Density = (3.33kg or g)/cm³(since you didn't state the unit of the mass)

Answer:

The volume of container is 39.14 L.

Explanation:

Given data:

Number of moles of neon = 4.0 mol

Pressure of gas = 2.5 atm

Temperature of gas = 25°C

Volume of container = ?

Solution:

we will use general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

25+273 = 298 K

Now we will put the values in formula.

2.5 atm × V = 4.0 mol × 0.0821 atm.L/ mol.K ×  298 K

V = 97.86 atm.L /2.5 atm

V = 39.14 L

The volume of container is 39.14 L.

Answer:

The heating element is near the bottom of the kettle because of the way it heats up the water. The water is heated through the flow of electricity meeting resistance in the form of the element.

Explanation:

Answer:

What is the kinetic energy of a 2kg rabbit hopping at a speed of 1.25 m/s?1,5625J

Answer: oil

The answer is A, oil. Oil is one of the most popular fossil fuels. You probably did not know the answer was fossil fuels. The answer is oil.

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Answer:

B

Explanation:

because it makes you want to know what happens in an experiment

Answer:

B. encourages new experimentation.

Explanation:

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7.2 / 2.4 = 3 half-lives

(1/2)3 = 0.125 (the amount remaining after 3 half-lives)

100.0 g x 0.125 = 12.5 g remaining

Answer:

B is the answer

Explanation:

Answer:

answer: B

Explanation:

becaucse it is B

A bond between a nonmetal and a nonmetal is called a covalent bond. The correct answer is option C.

Covalent bonding occurs when two nonmetal atoms share one or more pairs of electrons in order to achieve a stable electron configuration.

This type of bond is characterized by the sharing of electrons between the atoms, rather than the transfer of electrons as in ionic bonding.

An example of a covalent bond between two nonmetals: The bond between two oxygen atoms in an [tex]\rm O_2[/tex] molecule. In this molecule, the two oxygen atoms share two pairs of electrons to form a stable covalent bond.

Therefore, option C. Covalent bond is a bond between a nonmetal and a nonmetal.

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Answer:

C

Explanation:

Answer:

c.metal

Explanation: metal is able to carry heat

Answer:

today, petroleum is mostly used as a source of energy, being rich in combustible carbon in the production of electricity or running some sorts of heat engines. ... Raw petroleum (also known as crude oil) is used in three major ways: Transportation, Electricity Generation, and Material Production.

Explanation:

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Answer:

homogeneous mixture

Explanation:

A homogeneous mixture and Solution are the physical blend of two or more substances with uniform composition. Thus, options A and C are true.

“Mixture is an act of combining two or more chemical substances that are not chemically linked.”

Types of mixtures –

There are two main types of mixture.

Homogeneous Mixture –

A Homogeneous Mixture is a mixture in which composition is uniform throughout the mixture, and it appears like a single substance.

Example – Air is a homogeneous mixture of gas etc.

Heterogeneous mixture –

A Heterogeneous mixture is a mixture in which composition is not uniform throughout the mixture.

Example – Vegetable soup is a heterogeneous mixture etc.

Solution –

A Solution is a homogeneous mixture of two or more solutes dissolved in a solvent.

Example – Solution of sugar in water etc.

Thus, a homogeneous mixture and solution are the physical blends of two or more substances with uniform composition. Thus, options A and C are true.

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Answer:

homogeneous mixture

Explanation:

The correct classification for air is a homogeneous mixture.

Material is referred to as a mixture when two or more chemicals combine without undergoing a chemical reaction.

Heterogeneous and homogeneous mixtures are the two types of mixtures.

While homogeneous mixtures seem consistent throughout, heterogeneous mixtures have clearly discernible components.

A solution, which can be a solid, liquid, or gas, is the most typical kind of homogenous mixture.

Mixtures are composed of two or more different substances that have not been chemically mixed. The following is a list of mixture properties.

Each of the components in a mixture retains its unique features.

Component separation is simple to carry out.

The component's relative weights vary.

The classification for air is 78% nitrogen, 21% oxygen, 0.9% argon, 0.03% carbon dioxide, and 0.07% other gases.

This classification for air has the properties of a homogeneous mixture.

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Answer:

Some abiotic factors of the taiga are temperature, precipitation, soil, and sunlight.

Explanation:

emperature affects the taiga because the winter temperature range is -65*F to 30*F (-54*C to -1*C), while the temperature range in the summer is 20*F to 70*F (-7*C to 21*C)

Precipitation affects the taiga because there's some precipitation that falls [30-85 cm. (12-33 in.)].

Soil affects the taiga because there's some acidic and low-in-nutrients soil, and some fertile soil.

Sunlight affects the taiga because there are small amounts of it that reach the ground.

The taiga biome's abiotic components include temperature, sunshine, soil, air, water, etc. Cold arctic air predominates in the taiga environment. The taiga receives more light in the summer, which causes the days to be hotter.

Abiotic elements, also known as abiotic factors, are non-living chemical and physical elements of the environment that have an impact on the health of living things and the operation of ecosystems. Biology as a whole is supported by abiotic causes and the phenomena that go along with them.

Biotic and abiotic components, such as rainfall, in that order. The taiga is the biggest biome on Earth's surface and features a diversity of migratory and resident creatures. It also has long, cold, and dry winters and short, warm, and moist summers.

The Taiga biome is restricted by four primary criteria. Fire, temperature, the quantity of nutrients in the soil, and sunshine are the four limiting elements. Because certain plants, like the Jack Pine, recover after fire, it is a limiting element in the Taiga biome.

Thus, The taiga biome's abiotic components include temperature, sunshine, soil, air, water, etc.

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Answer:

boiiiiiiiiiii

Explanation:

Answer: sunlight, water, air, habitat, and food.

Explanation: we are all living organisms and we all have our five basic necessities for survival; sunlight, water, air, habitat, and food.

Answer:

Química orgánica

Explanation: