The atomic number of an element configuration 2,8, 8,2,13​

Answer:

NOUN

a thing that is composed of two or more separate elements; a mixture

Explanation:

basically a mixture

yes the answer is right bro

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

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

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:

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:

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:

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:

ethanol

Explanation:

The better fuel for heating the water is ethanol as it burned with a clean blue flame.

The color of a flame can be red, orange, blue, yellow, or white. When extra chemicals are added to the fuel burning, it affects the frequencies of visible light radiation emitted.

The temperature of a flame is shown by its color and bright blue and has a temperature of about 1670 K. The temperature will drop as the color changes from yellow to orange. The cooler flame is often red and also forms smoke. The color of the flame also depends upon the supply of oxygen gas that is required to burn.

As mentioned in the observations of the ethanol and butanol. The ethanol burns the clean blue flame while butanol burns with a yellow sooty flame.

Therefore, ethanol is a better fuel for heating water than butanol.

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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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Answer:

Molar enthalpy change, the enthalpy change for one mole of a pure substance

Explanation: i think

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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Answer:

Explanation:

We know that, 1 mole of any substance contain 6.022 X 10^23 atoms/molecules.

Thus,  6.022 X 10^23 atoms = 1 mole

Therefore, 1.29x10^24 =

                                    = 2.14

Thus, 2.14 moles are present in 1.29x10^24 hydrogen atoms in HF.

Answer:

It the letter K

Explanation:

Answer:

There are no atoms becuase atoms are not in elements.

Explanation:

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:

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:

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:

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.

x

Answer:

Atoms are extremely important structures that make up all of the materials on earth.

Explanation:

Atoms are in our bodies and they bond together to form molecules, which make up matter.

Answer:

Explanation:

[like living things non-living things have properties that u can see such as color,hardness,or softness]

[living things and non-living things are made of small particles called atoms]

ATOM made up everything that takes up space

Answer:

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

Answer:

a po

Explanation:

promise HAHAHAHHAHAHAH

Answer:

isotopes

Explanation:

trust me

Answer:

The globs rises due to convection.

Explanation:

Convection is when warmer parts move to the top and the cooler parts move to the bottom.  Since the globs are going to be warmer, they rise to the top.

Hope this helps :D

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:

B. New Moon!

Explanation:

New Moons are commonly seen as nearly or completely dark, this is because the rays of the sun completely overshadow the moon's "light," therefore making it appear dark.

Answer:

the machete

Explanation:

:)

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:

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:

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