The subatomic particles of an element are very important to that element and affect an element each in it's own way.

What are the three subatomic particles of an atom and what are their respective charges? If I wanted to figure out how to find the number of nuetrons, how could I use the atomic mass to find it?

The accurate measurement is 0.51s and precise one is 0.516 s to 0.524 s.

0.51 is accurate measurement because this value is more closer to 0.500 s compared to other given options.

The measurement of 0.516 and 0.524 must have taken from highly precised instrument because it is capable of making measurement upto 3 decimal place.

Hence 0.516s and 0.524s is most precise team.

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A sample of 25.0-g pure iron at the 85 °C is dropped into 75 g of water at 20°C.  22.25 °C is the final temperature of the water-iron mixture.

The specific heat equation is represented as

Q = mcΔT

where,

Q = heat energy in Joules

m = mass of substance

c = specific heat

ΔT = change in temperature in K

For iron given that

m = 25 g

c = 0.45 J/g°C

T₁ = 85°C

Now by putting the values in the above formula then we get

Q₁ = mcΔT

    = 25 × 0.45 × (T₂ - 85)

    = 11.25 × (T₂ - 85)

For water given that

m = 75 g

c = 4.184 J/g°C

T₁ = 20°C

Now,

Q₂ = mcΔT

     = 75  × 4.184 × (T₂ - 20)

     = 313.8 × (T₂ - 20)

Now,

Heat is generated by the iron = Heat is gained by the water.

Q₁ = -Q₂

11.25 × (T₂ - 85) = - 313.8 × (T₂ - 20)

325.05 T₂ = 7232.25

T₂ = 22.25 °C

22.25 °C is the final temperature of the water-iron mixture.

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The body's muscles become increasingly paralyzed as a result of tetrodotoxin's interference with the signaling process from nerves to muscles. Toxic exposure to tetrodotoxin may be lethal.

Scrub all right, had to drink a poisonous substances that paralyzes body resulting in death.

Tetrodotoxin (TTX), a neurotoxin, is extremely poisonous.

Tetrodotoxin is a sodium channel blocker. It stops neurons from firing action potentials by clinging to the voltage-gated sodium channels in nerve cell membranes and obstructing sodium ions from entering the neuron, which are crucial for an action potential's rising phase.

Due to the neurological system's inability to communicate, muscles are unable to contract in response to nerve inputs. It works by selectively blocking sodium channels.

The majority of its occurrences are in the livers and sex organs of several fish species, such as puffer fish, globefish, and toadfish (order Tetraodontiformes) (gonads).

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Answer:

The moles of ammonia present will be "0.274 moles".

Molar mass:

A particular element's molar mass would be the mass of either the material that contains 1 mole of material. It should be the weight of such mole of something in basic words.

To determine the molar mass, multiply the atomic mass per each substance by the component's subscript throughout the chemical equation.

Given:

Weight in grams, w = 4.652 g

Molar mass, m = 17.030 g/mol

We know,

→ Number \ of \ moles (n)= \frac{Weight(w)}{Molar \ mass(m)}Number of moles(n)=

Molar mass(m)

Weight(w)

By substituting the values,

n = \frac{4.652}{17.030}n=

17.030

4.652

= 0.274=0.274 moles

Thus the response above is right

The density of pure water is 1 g/cm^3.

Its density is 0.98 g cm 3 at room temperature, in comparison with the handiest zero.92 g cm 3 for ice, a reality that has to be defined through atomic, and molecular concepts. If ice has been no longer much less dense than water, it might sink, having a devastating impact on lake backside ecosystems. believe it or now not, ice is honestly about 9% much less dense than water. for the reason that water is heavier, it displaces the lighter ice, causing the ice to glide to the pinnacle.

The density of ice is about 90 percent that of water, but that could range because ice can contain air, too. meaning that about 10 percent of an ice cube or iceberg will be above the water line. The density of water is maximum at four∘C, and the density of the ice is much less than the water due to its susceptible intermolecular pressure of attraction. as the density of water is more, it's miles heavier than ice. therefore ice floats on the floor of the water. Ice continually floats due to the fact it's far less dense than everyday water. because frozen water molecules shape a crystal.

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Answer:

Synthesis reaction

Explanation:

In synthesis reactions, two or more atoms/molecules combine to form a larger molecule.

These reactions follow the general structure: A + B <-----> AB.

The number of atoms of nitrogen in an 80.0 g sample of dinitrogen tetroxide (N₂O4) is 1.047 * 10²⁴ atoms.

The number of nitrogen atoms in an 80.0 g sample of dinitrogen tetroxide (N₂O4) is calculated as follows:

Molar mass of N₂O4 = 92 g/mol

Moles of N₂O4 in 80.0 g sample = 80/92

Moles of N₂O4 in 80.0 g sample =0.87 moles

Moles of nitrogen in the sample = 0.87 * 2

Moles of nitrogen in the sample = 1.74 moles

1 mole of nitrogen contains 6.0 * 10²³ atoms

Number of atoms of nitrogen = 1.74 * 6.0 * 10²³ atoms

Number of atoms of nitrogen = 1.047 * 10²⁴ atoms

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Answer:

Organic compound features:

Explanation:

Complex structures

High molecular weights

Depend on Carbon, Hydrogen and Water

Combustile in nature

Form covalent bonds

Low melting and boiling points

Answer:

Atomic radius is the radius of an atom. It can be attained through measuring the radius of an atom in a variety of bonds and averaging them to get it.

Explanation:

First we will balance the given equation:

NaBH4 (s) + BF3(g) B₂H6(g) + NaBF4(s)

Balanced equation:

3NaBH4 (s) + 4BF3(g) 2B₂H6(g) + 3NaBF4(s)

ii) 4 moles of BF3 reacts with 3 mole of NaBH4

1 mole of BF3 reacts with 3/4 = 0.75 mole of NaBH4

so the 1.299 moles of BF3 will react with 1.299× 0.75 = 0.974 moles of NaBH4

iii) 3 moles of NaBH4 gives 2 moles of B2H6

1 mole of NaBH4 gives 2/3 = 0.6 moles of B2H6

so, 0.893 mole of NaBH4 will give 0.893 × 0.6 = 0.535 molesof B2H6.

iv) 2 moles of B2H6 is produced with 3 moles of NaBF4

if 1 mole of B2H6 is produced then 3/2 = 1.5 moles of NaBF4 is produced with it.

so is 1.987 mol of B2H6 is obtained then 1.987 × 1.5 = 2.98 moles of NaBH4 will be obtained.

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The mass of ZrCl₂ needed to prepare the solution, given the data is 30.98 g

We'll begin by obtaining the mole of ZrCl₂. This can be obatined as follow:

Mole = Molarity x Volume

Mole of ZrCl₂ = 1.25 × 0.153

Mole of ZrCl₂ = 0.191 mole

We can obtain the mass of ZrCl₂ needed to prepare the solution as follo:

Mass = mole × molar mass

Mass of ZrCl₂ = 0.191 × 162.22

Mass of ZrCl₂ = 30.98 g

Thus, the mass of ZrCl₂ needed to prepare the solution is 30.98 g

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The equilibrium constant is 0.026.

Let us recall that the equilibrium constant is a number that shows us the extent to which reactants are converted into products. In other words, a large positive value of the equilibrium constant indicates that most of the reactants have been converted into products.

Initial concentration of A =  0.880 mol /3.00 L = 0.29 M

Equilibrium concentration of C = 0.150 mol /3.00 L = 0.05 M

We can set up the ICE table thus;

        2A(aq)   ⇄   2B(aq)  +   C(aq)

I      0.29 M         0                  0

C       -2x               +2x            +x

E   0.29 - 2x         2x                0.05 M

Where

x = 0.05

At equilibrium;

[A] =    0.29 - 2(0.05 ) = 0.19 M

[B] = 2(0.05) = 0.1 M

[C] = 0.05 M

K = [B] [C] /[A]

K = 0.1 * 0.05/ 0.19

K = 0.026

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The facts you find in reference source that support your data in an experiment​ is known to be called research.

Research is known to be a term that is defined as as  a kind of "creative and methodical form of activity done to improve the body of knowledge.

It entails the objective gathering, organizing, and analysis of data in order to improve comprehension of a subject or issue.

The Research is described as the thoughtful analysis of studies pertaining to a certain issue or problem utilizing scientific methodologies.

Therefore, since Research is a methodical inquiry, one can say that he facts that you find in reference source that support your data in an experiment​ is known to be called research.

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Answer:

Atoms

Explanation:

Atoms are made of extremely tiny particles called protons, neutrons, and electrons. Protons and neutrons are in the center of the atom, making up the nucleus. Electrons surround the nucleus. Protons have a positive charge.

Answer:

Cobalt(III) Borate CoBO3 Molecular Weight -- EndMemo.

Explanation:

The interdependent relationship between advances in technology and scientific discoveries has enhanced our understanding of the universe. schooling, merchandising, and different multidisciplinary efforts by way of fostering higher information about the multidimensional nature of research.

Development in technological know-how and technology studies seeks to improve the techniques of technology and technology studies, Clinical expertise is used to create new technologies. New technology regularly allows scientists to explore nature in distinct ways and make new discoveries.

Technological know-how is the have a look at the natural world through a scientific approach i.e. collecting facts via a systematic procedure. And era is in which we observe science to create gadgets that can solve issues and perform distinct responsibilities. technology is literally the utility of science.

Society drives technological improvements and scientific inquiry. technology offers us a perception of what form of technology we should doubtlessly create and a way to create them, even as technology allows us to behave in addition to medical studies.

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When atoms close in and overlap each other; atoms repel each other. When atoms lie separated from each other; atoms attract each other

According to the theory of valence bonds, a covalent bond is made up of two atoms that are joined together and produce a pair of electrons that are shared by both of their bonded atomic orbitals. When a portion of one orbital and a portion of a second orbital occupy the same region of space on two separate atoms, we say that their orbitals overlap. The valence bond theory states that a covalent bond forms when two circumstances are true:

1. orbital on one atom overlaps another, and two solitary electrons in each orbital come together to form an electron pair.

2. atoms are physically connected by a force known as a covalent bond thanks to the attraction between this negatively charged electron pair and the positively charged nuclei of the two constituents. The degree of orbital overlap determines how strong a covalent bond will be. Stronger bonds are created by orbitals with more broad orbital overlap than by those with less overlap.

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If 7.50 mol of NH₃ and 8.15 mol of O₂ react in the following reaction. The number of moles of H₂O that will be formed is 9.84 moles.

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

Using the molar coefficients in the balanced equation, 6 moles of water are formed for every 4 moles of NH₃.

6 moles of water are formed for every 5 moles of O₂.

So (7.5 moles NH₃)(6 moles H₂O)/4 moles NH₃) = 11.25 moles water

For (8.20 moles O₂) / (6 moles H₂O)(5 moles O₂) = 9.84 moles H₂O.  

So O₂ is the limiting reagent, and we can only make as much product as allowed by the limiting reagent.

Thus, the number of moles is 9.84 moles of water.

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The net ionic equation of potassium hydroxide and perchloric acid combined in aqueous solutions is

H⁺ + OH⁺ → H₂O

Step 1: Complete the equation, write the correct chemical formula for each compound both in reactant and product  

Step 2: Separate the compounds in ionic form.

Step 3: Stike out the common element in the product and the reactant side.

Demonstration: KOH (aq) + HCLO₄ (aq) → KCLO₄(aq) + H₂O(lq)

Total ionic equation: K⁺ + OH⁻ + H⁺ + CLO₄ → K⁺ + CLO₄ + H₂O

Net ionic equation: H⁺ + OH⁻ → H₂O

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Taking into account the definition of density, the metal with a volume of 12.3 mL and a mass of 96.7 g is iron.

Density is defined as the property of matter, whether solid, liquid, or gas, that allows the amount of mass in a given volume of a substance to be measured.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

In this case, you know that:

Replacing in the definition of density:

density= 96.7 g÷ 12.3 cm³

Solving:

density= 7.86 g/cm³

On the other hand, you know that the densities of zinc, chromium and iron are 7.89, 7.20 and 7.86 g/cm³, respectively.

Finally, the metal with a volume of 12.3 mL and a mass of 96.7 g is iron.

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Li lose one electron to acquire an electronic configuration. I must accept one electron, N accept three electron and Al lose three electron to acquire noble gas electronic configuration.

For Li,

Li belongs to first group of the periodic table and have 3 as atomic number. So, it lose one electron to acquire stable electronic configuration like as Helium.

For I,

I belongs to 17th group of the periodic table and have 53 as atomic number. So, it accept one electron to acquire stable electronic configuration like as Xenon.

For N,

N belongs to 15th group of the periodic table and have 7 as atomic number. So, it gain three electron to acquire stable electronic configuration like as Neon.

For Al,

Al belongs to 3rd group of the periodic table and have 13 as atomic number. So, it lose three electron to acquire stable electronic configuration like as Neon.

Thus, we concluded that Li lose one electron to acquire an electronic configuration. I must accept one electron, N accept three electron and Al lose three electron to acquire noble gas electronic configuration.

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Answer:

7.51

×

10

24

The density

ρ

of a sample is its ratio of mass

m

to volume

V

:

ρ

=

m

V

.

To find the number of atoms in this sample, first multiply the volume by the density to get the mass. Then divide this mass by the mass of one atom.

133

c

m

3

T

a

(

17.0

g

1

c

m

3

)

(

1

atom

T

a

3.01

×

10

−

22

g

T

a

)

=

7.51

×

10

24

Ta atoms

The conclusions that can be drawn from the examination is that peanuts contain lipids and proteins.

Sudan IV is a dye used for staining of lipids ,triglycerides.The test making use of Sudan IV involves adding a few drops of Sudan IV to the solution containing lipids.

If no lipids are present in the sample ,the dye sinks at the bottom of the test tube.Positive test for Sudan IV involves the color of the reagent changing to red.

Biuret  test is a chemical test used for detection of peptide bonds that is in turn proteins present in a sample.In the presence of proteins, it forms a violet color co-ordination complexes in alkaline range.

The test can be used for testing the concentration of proteins as peptide bonds occur along the same frequency per amino acid.

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The elements involved could be ba--rium and strontium.

We know that the ionization energy refers to the energy that must be supplied in order for an electron to leave the atom. The energy could bee supplied in the form of heat or light.

In the question, we have the first four ionization energies of the elements X and Y. The lower first and second ionization energies suggest that the electrons are removed from the outermost shells and that the two elements are divalent. That explains the quantum jump that occurs after the second ionization energy in each case.

The low first and second ionization energies implies that the elements are highly electropositive and are likely to be ba--rium and strontium.

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5.845 mg of table salt provides the upper safe limit  in the recommended daily requirement of sodium.

Molar mass of common table salt that is sodium chloride is         23.0+35.5=58.5 g/mole which is the addition of molar masses of sodium and chlorine,the constituents of sodium chloride.

As the common table salt is 39.3% sodium by mass therefore it has 23.01975 g or 23019.75 mg of sodium.

                      39.3/100×58.5=23019.75

As 58.5 g of sodium chloride has 23.019 g of sodium therefore 2.3 g of sodium is present in 5.845 g, which is 5.845×10[tex]^-3[/tex]mg.

                 2.3×58.5/23.019=5.845 mg.

Mass percent of any compound is usually calculated as mass of the compound divided by it's total mass and then multiplied by hundred.It is a way of expressing concentration of a component.It describes how much solute is present in 100 grams of solution.

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