A _____ is two or more substances that are together in the same place but are not chemically combined.

Answer:

if charge of ion is positive then it will loose electron

if charge of ion is negative it will gain electron

Answer:

A. is the correct point.

Explanation:

This is true because no matter how many mL of water is added, the solution only gets more height; the concentration in everything else stays the same, and water doesn't have any concentration. Very confusing, I know. Good luck!

Answer:

Intertidal zone (i think)

Explanation:

Answer:

A

Explanation:

Answer: The answer is probably B because most of the precipitation and evaporation in the water cycle happens over the oceans. Including, about 78 percent of the precipitation and 86 percent of evaporation.

The statement about the ocean is true is most evaporation and precipitation in the water cycle occur over the ocean. Therefore, option 2 is correct.

The continual movement of water on, above, and below the Earth's surface is referred to as the water cycle, also known as the hydrologic cycle or the hydrological cycle.

The water cycle is composed mostly of four processes: evaporation, convection, precipitation, and collection. When water in rivers, lakes, or the ocean is heated by the sun and turned into vapour or steam, this process is known as evaporation. The river, lake, or ocean releases water vapor or steam into the atmosphere.

The hydrologic cycle is crucial because it determines how water gets to people, plants, and other species. In addition to supplying water for people, animals, and plants, it also transports nutrients, diseases, and sediment into and out of aquatic habitats.

Thus, option 2 is correct.

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A force that resists motion when objects touch is friction. Frictional force is the force that prevents an object from moving.

The term friction is defined as the force that opposes the motion of a solid object over another. There are four types of friction that are static friction, sliding friction, rolling friction, and fluid friction.

Three factors in particular determine the frictional force between two bodies: The adhesion between body surfaces, the surface roughness, and the deformation of bodies are all factors.

Frictional force is the force that prevents an object from moving. The imperfections on the two surfaces in contact are what produce friction. The type of surfaces in contact affects friction.

Thus, A force that resists motion when objects touch is friction.

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Answer:

It's simple substitution reaction and there is no balance for the equation. It's right written.

Explanation:

Explanation:

the further down the group you go, the larger the radius becomes. its caused by the amount of electrons needed to equal out the charge of the nucleus

Atomic radius increases down the group in the periodic table and due to the increase in the number of shells.

Explanation:

So, from this, we can conclude that atomic radius increases down a group in the periodic table and due to the increase in the number of shells.

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Answer: Decreases across the period and increases down the group

Answer:

[tex]\frac{15}{7}N[/tex]

Explanation:

We already know that the mass number of an atom is the sum of the number of protons and the number of neutrons.

So, the mass number of this isotope is;

Number of protons = 7

Number of neutrons = 8

Mass number = 7 + 8 = 15

Hence, the isotope is;

[tex]\frac{15}{7}N[/tex]

Explanation:

The ground state electron configuration of ground state gaseous neutral potassium is 4s1 and the term symbol is 2S1/2.

Explanation:

1-burning fossil fuels.

Sulfur dioxide released by the burning of fossil fuels like coal, petroleum is the major cause of air pollution.

Gases emitted from vehicles including trucks, jeeps, cars, trains, aeroplanes cause an immense amount of pollution.

2-Agricultural activities

Use of insecticides, pesticides and fertilizers in agricultural activities release harmful chemicals into the air and can also cause water pollution.

3-Exhaust from factories and industries

Manufacturing industries release a large amount of carbon monoxide, hydrocarbons, organic compounds, and chemicals into the air thereby depleting the quality of air.

Petroleum refineries release hydrocarbons and various other chemicals that cause air pollution.

4-Mining operations:

Mining is a process wherein minerals below the earth are extracted.

During this process dust and chemicals are released in the air causing massive air pollution.

Answer:

A fuel is a natural substance that, when burned, produces energy  (usually thermal/heat energy)

Answer:

Fuel is something that can be used to make some actions happen. Fuel is something that can be made to react with some other substances so that it releases energy as heat energy or some other kind of energy

Answer:

Amount of oxygen react with 48 g of magnesium = 32 gram

Explanation:

Given:

Amount of oxygen react with 4.8 g of magnesium = 3.2 g

Find:

Amount of oxygen react with 48 g of magnesium

Computation:

Using Law of equal proportion;

Amount of oxygen react with 48 g of magnesium = 48(3.2/4.8)

Amount of oxygen react with 48 g of magnesium = 32 gram

Answer:

116,823 J

Explanation:

formula : q=m C delta T

q = heat = unknown

mass = 100 g

C = specific heat = 4.2 J/K*g

delta T = temperture in Kelvins: 5 + 273.15 = 278.15 K

q = (100 g) ( 4.2 J/K*g) (278.15 K) = 116,823 J

Answer:

when it reduces heat.

Explanation:

Thermal energy is transferred to material,the motion of its particles speeds up and it's temperature differences.Insulating materials are bad conductors and so this reduces the heat loss by conduction.The material also prevents air circulating inside the cavity,therefore reducing heat loss by convection.Heat loss through the roof can be reduced by laying loft insulation.

Answer:

The CO2 Extinguisher Cannisters contain carbon dioxide in liquid form, and when the extinguisher is let off the liquid is released into the air neutralising the oxygen that the fire is feeding on, disabling the fires ability to spread.

Answer:

0.136mol

Explanation:

Using the general gas law equation as follows:

PV = nRT

Where;

P = pressure (atm)

V = volume (Litres)

n = number of moles (mol)

R = gas constant (0.0821 Latm/mol K)

T = temperature (K)

K = °C + 273

K = 50°C + 273

K = 323K

According to this question, P = 3.6atm, T = 323K, V = 1.00L, R = 0.0821 Latm/mol K, n = ?

3.6 × 1 = n × 0.0821 × 323

3.6 = 26.52n

n = 3.6/25.52

n = 0.1357

n = 0.136mol

Answer:

It is a technique of collection and storage of rain water

Answer:

you got this

Explanation:

because it is confusing

Answer:

1 moles

I assume you are converting between moles 2NaOH and gram. You can view more details on each measurement unit: molecular weight of 2NaOH or grams The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles 2NaOH, or 41.99711 grams.

Explanation:

I hope this helps and pls mark me brainliest :)

Number of molecules are in 2NaOH​ are 12.044 × 10²³.

Avogadro's number is the number of units in one mole of any substance and equals to 6.02214076 × 10²³. The units can be electrons, atoms, ions, or molecules.

No. of moles is defined as a particular no. of particles that we can calculate with the help of Avogadro’s number.

Mass of a particular product is also find out by stoichiometry of a reaction as per the no. of mole given in the reaction.

Given are 2 moles of NaOH.

one mole of any substance and equals to 6.02214076 × 10²³

Therefore,  Number of molecules are in 2NaOH​ are 12.044 × 10²³.

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Answer: [tex]_{70}^{177}\textrm{Yb}\rightarrow _{71}^{177}\textrm{Lu}+_{-1}^{0}\textrm{e}[/tex]

Explanation:

Beta-decay: In this process, a neutron gets converted into a proton and an electron releasing a beta-particle. The beta particle released is basically a electron with -1 charge and no mass.

[tex]_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{X}+_{-1}^{0}\textrm{e}[/tex]

General representation of an element is given as:  

where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

[tex]_{70}^{177}\textrm{Yb}\rightarrow _{71}^{177}\textrm{Lu}+_{-1}^{0}\textrm{e}[/tex]

Answer:

i think it is true

Explanation:

if it correct plz plz mark as brainliest

thank you

19NBoli

Answer:

i hope my answer help you

Explanation:

a/true

Answer:

The uncharged water is attracted to the charged balloon.

Explanation:

Electrostatics is the study of charges at rest. Neutral bodies have equal and evenly distributed positive and negative charges. However, these neutral bodies can become either positively or negatively charged. These charges can be produced by either of friction, contact or electrostatic induction.

For example, when an ebonite rod is rubbed with fur, the ebonite rod acquires a charge by friction. The ebonite rod becomes negatively charged while the fur is left with positive charges.

Similarly, for the experiment performed by Yolanda, when she rubs a cloth against a balloon, the balloon becomes negatively charged . Water is neutral in that it is composed of equal positive and negative charged particles. When she brings the balloon near the water, the positive charged particles in the water will move the water towards the negatively charged balloon since positive and negative charges are attracted to each other.

Answer:

transferred

Energy

Explanation:

Energy is the ability to change the state of bringing about a work leading to movement or generating electromagnetic radiation. There are actually many forms of energy. So, kinetic energy is a form of energy related to the movement of a body. The combustion, in turn, retrieves the potential energy chemical contained in fuels. Solar panels capture light energy to transform it into electrical energy.

Answer:

*it can cause the atom to become and ion

Answer

50 Psi = 3.4023 atm