help, please...I have no idea what I'm doing :D

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!

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:

ice absorbs heat from water.

Explanation:

Heat is a measure of molecular activity: the faster a thing's molecules move, the more heat that substance contains. And because everything is made of molecules, and molecules are in constant motion, everything contains at least some heat.

Because ice molecules move slowly and cluster tightly together, they produce a relatively low amount of heat. When ice is placed in a glass of water whose molecules are moving at a greater rate, the ice begins to absorb energy, because heat always travels from regions of relative warmth to colder areas in order to equalize temperatures. In other words, ice absorbs heat from the water.

As the water molecules lose energy, they begin to slow down, and consequently cool. So, it's kind of the opposite of what you might think: when we put ice in water, the ice doesn't give its cold to the water, it takes heat from the water.

Answer:

a po

Explanation:

promise HAHAHAHHAHAHAH

Answer:

isotopes

Explanation:

trust me

Answer:

you got this

Explanation:

because it is confusing

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:

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

рахмаат эже Айюб в бишкек и мы стали его называть как

Answer:

brainliest please

Explanation:

A tissue is an ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function. Organs are then formed by the functional grouping together of multiple tissues.

Answer:

7.08 L

Explanation:

From the question given above, the following data were obtained:

Initial mole (n₁) = 1.2 moles

Initial volume (V₁) = 5 L

Final mole (n₂) = 1.2 + 0.5 = 1.7 moles

Final volume (V₂) =?

From ideal gas equation,

PV = nRT

Divide both by n

PV / n = RT

Divide both side by P

V / n = RT/P

RT/P => constant

Therefore,

V₁ / n₁ = V₂ / n₂

With the above formula i.e

V₁/n₁ = V₂/n₂

We can obtain the final volume of the gas as follow:

Initial mole (n₁) = 1.2 moles

Initial volume (V₁) = 5 L

Final mole (n₂) = 1.7 moles

Final volume (V₂) =?

V₁/n₁ = V₂/n₂

5 / 1.2 = V₂ / 1.7

Cross multiply

5 × 1.7 = 1.2 × V₂

8.5 = 1.2 × V₂

Divide both side by 1.2

V₂ = 8.5 / 1.2

V₂ = 7.08 L

Therefore, the final volume of the gas is 7.08 L

Answer:

Compared with other colorants, carbon black has a high coloring power. Therefore. it is used as ink for printing newspapers, as ink-jet toner, and for other such uses. It is also suitable as a pigment for heat-molded plastics, car fenders, coating for electric wires, and other products.

Explanation: Hope this helps. Branliest if possible. Thx

Answer:

as the potential energy decrease the kinetic energy increases

Explanation:

at the cliff it possess maximum potential energy but as it falls it possess maximum Kinetic energy

When the rock is still stationary at a height, it possess all potential energy. As it begins to fall from the height, potential energy decreases and kinetic energy increases.

Energy transformations involve the change of energy from one form to another in accordance with the principle of energy conservation.

For a rock found at a height, all it has is potential energy. This potential energy decreases when the rock begins to fall and kinetic energy increases accordingly.

Hence, for a rock that falls off a cliff, as the potential energy increases, the kinetic energy increases.

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The number of particles in 2.38 g ammonium phosphate are [tex]\rm \bold{9.0345\;\times\;10^2^1}[/tex].

The number of particles in a mole of sample is given by Avogadro law. The number of particles in a mole of a sample is equivalent to [tex]\rm 6.023\;\times\;10^2^3[/tex].

The given mass of ammonium phosphate is 2.38 g.

The molar mass of ammonium phosphate is 149 g/mol

The moles of the sample is given as:

[tex]\rm Moles=\dfrac{Mass}{Molar\;mass} \\\\Moles\;(NH_4)_3PO_4=\dfrac{2.38\;g}{149\;g/mol}\\\\ Moles\;(NH_4)_3PO_4=0.015\;mol[/tex]

The available moles of ammonium phosphate is 0.015 mol.

According to Avogadro's law, the number of particles in the sample is given as:

[tex]\rm 1\;mol=6.023\;\times\;10^2^3\;particles\\\\0..015\;mol=\dfrac{6.023\;\times\;10^2^3\;particles}{1\;mol}\;\times\;0.015\;mol\\\\ 0.015\;mol=9.0345\;\times\;10^2^1\;particles[/tex]

The number of particles in 2.38 g ammonium phosphate are [tex]\rm \bold{9.0345\;\times\;10^2^1}[/tex].

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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:

1. C(2)+H2(1) -> C2H6(1)

2. NH3(2)+O2(3)-> HCN(2)+H2O(3)

I am not sure about the second one.

Answer:

There are no atoms becuase atoms are not in elements.

Explanation:

Answer:

Both animal and plant cells are eukaryotic cells and have several similarities. The similarities include common organelles like cell membrane, cell nucleus, mitochondria, endoplasmic reticulum, ribosomes and golgi apparatus

Explanation:

hey both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes.

Answer:

Plant and animal cells are very similar, because they are both, Eukaryotic Cells. They both contain membrane-bound organelles such as the: Nucleus, Mitochondria, Endoplasmic Reticulum, Golgi Apparatus, Lysosomes, and Peroxisomes.

Hope this helps.

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Answer:

Zacharias Janssen

Explanation:

Zacharias Janssen is known as the man who invented the compound microscope which is widely used today by most scientists all over the world.

The compound microscope was built in the 16th century during this period eyeglasses were just being introduceed to people all around.

Zacharias Jensen achieved this great feat with the help of his father Hans who was also anther great scientist, he mentored his son throughout the years and gave him the necessary skills and knowledge to produce the compound microscope.

Answer:

*it can cause the atom to become and ion

Answer: Decreases across the period and increases down the group

Answer:

155.5%

Explanation:

from the equation

2mol of Na3PO4 reacts to give 6mol of Nacl

therefore 6.12mol of Na3PO4 will give 18.36mol of Nacl

2mol Na3PO4............ 6mol of nacl

6.12mol NaPO4.......... 6×6.12mol/2mol = 18.36mol of Nacl

mass of Nacl = mol × molar mass

where molar mass of Nacl= 23+12=35g/mol

mass of Nacl= 18.36 × 35= 642.6g of Nacl

percentage yield = actual yield/ theoretical yield ×100%

percentage yield= 1001g (given)/642.6g(used) ×100 = 155.5%

Answer:

107%

Explanation

6.12 mol Na3Po4 | 6 mol NaCl | 58.44 g NaCl

______________________________________ = 1072g NaCl

                              | 2 mol Na3Po4 | 1 mol NaCl

1072g/1001g x 100= 107%

Answer:

the alkali and the alkaline earth metals comprise the first two columns periodic table traditionally referred to as groups IA and iia. respectively (figure, 1).

Explanation:

the alkaline and alkali earth metals are a group of elements in the periodic table

Answer:

It is a technique of collection and storage of rain water

Answer:

solute

Explanation:

solid particles are called solutes

liquid as solvents

in most of the cases

but may be different in few cases

Answer:

unsaturated solution

Explanation:

An unsaturated solution is defined as a solution In which more solute can be dissolved at the same temperature. Supersaturated: A supersaturated solution is defined as a solution in which excess solute is dissolved than required for the formation of a saturated solution.

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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it's the 1 and 3 I think it's that hopefully it's right

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:

its milky way galaxy..........

yes the answer is right bro