HELLO IS ANYONE GOOD AT SCIENCE IF SO PLEASE ANSWER THIS IS DUE TONIGHT

Answer:

true

Explanation:

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Answer: can you show me number 2

Explanation:

Given what we know, we can confirm that the time in which a solid phase and the liquid phase of an object are in perfect equilibrium is during the time that the temperature remains at the melting point of the substance.

Therefore, we can confirm that phase equilibrium refers to the time in which a substance is both in a solid and liquid state. This can be achieved during the melting of a substance and so the equilibrium state happens at the melting point.

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Answer:

Molecules with three electron pairs

Explanation:

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Answer: D: both teams will remain in place.

Explanation: if both teams have the same amount of force, they will cancel each other out and stay in place.

Answer:

B,B

Explanation:

did on edge

The complete equation of the reaction of silver nitrate and KCl is:

[tex]AgNO_3 + KCl \longrightarrow AgCl + KNO_3[/tex]

A displacement reaction can be described as one wherein an atom is displaced by another atom in a molecule. For example, when iron metal is added to copper sulfate solution, it displaces the copper metal.

A single displacement reaction is a kind of oxidation-reduction reaction when one element is displaced by the other element from its compound. Double displacement reactions occur in aqueous solutions and the exchange of ions takes place.

The reaction between the silver nitrate and KCl gives silver chloride and potassium nitrate.

AgNO₃  +  KCl →  AgCl  +  KNO₃

According to the reactivity series, in this reaction, potassium displaces the silver from the silver nitrate and forms potassium nitrate.

Therefore, the AgCl and KNO₃ will be formed as products of the reaction of AgNO₃ and  KCl.

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#SPJ5

Answer:

covalent

Explanation:

Answer:

3

Explanation:

Answer: gas and alkaline earth metal

Explanation:

Answer:

0.483 g/g

Explanation:

Solubility of KCl in water at 70o C is = 48.3 g/100 g = 0.483 g/g.

The energy absorbed by the system before the reaction start has been 752 kJ/mol.

The bond energy has been defined as the energy possessed by the bond that has been converted into the heat energy and utilized in the reaction.

The energy has been conserved in a chemical reaction. Thus, the energy absorbed by the reactant in the reaction has been the difference in the energy of the reactant and product.

The given reaction has been:

[tex]\rm H_2\;+\;CO_2\;\rightarrow\;CH_2O_2[/tex]

The bond energy of the reactant has been:

H-H bond energy = 432 kJ/mol

2 C=O bond energy= 799 kJ/mol

The total energy of the reactant has been 432 kJ/mol + 799 kJ/mol

The total energy of the reactant has been 1231 kJ/mol

The bond energy of the product has been:

C-O bonds = 358 kJ/mol

C=O bonds = 745 kJ/mol

1 C-H bond = 413 kJ/mol

1 O-H bond = 467 kJ/mol

The total energy of the product has been 358 + 745 + 413 + 467 kJ/mol

The total energy of the product has been 1,983 kJ/mol

According to the law of conservation of energy:

[tex]\text{Product energy=Reactant energy + energy absorbed}[/tex]

Substituting the values for energy absorbed:

[tex]\text{1,983 kJ/mol=1231\;kJ/mol+ energy absorbed}\\\rm Energy\;absorbed=1983-1231\;kJ/mol\\Energy\;absorbed=752\;kJ/mol[/tex]

The energy absorbed by the system before the reaction start has been 752 kJ/mol.

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D - HOCOOH

Each element is being labeled in the order it's arranged

Answer:all matter.

Explanation:

-Love Ricardo H. Sparks

Answer:

Atoms are the building blocks of life (everything basically)

Explanation:

Answer:

1.18

Explanation:

correct answer on ck-12

divide 120 kpa by 101 (1 kpa per 101 atm) and you get 1.18

If a vessel filled with gas is sealed such that the inside pressure is 120kPa then pressure in atm is 1.18.

Pressure is an external force which will be applied on any substance or matter to change in its position, state or condition.

As we know that realation between the kilopascal (kPa) unit and atmospheric pressure (atm) unit of gases will be represented as:

1 atm = 101.325 kPa

or 1 kPa = 1/101.325 atm

Given that, pressure inside the vessel = 120 kPa

Here the conversion factor is 1/101.325, now we multiply this factor to the above value and we get

120 kPa = 120×1/101.325 = 1.18 atm

Hence pressure of gas in atm is 1.18atm.

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Answer:

x = 42

Explanation:

cross multiply

7*x = 6*49

7x = 294

x = 42

Answer:

6/7=×/49

Cross Multiply

6x49=7x

294/7=7x/7

274÷7=42

Explanation:

Answer=42

Answer:

Explanation:

Hi there!

We have,

Molecular mass of H₂O = 2+16 = 18 g

According to the mole concept in terms of mass,

1 mole of H₂O  = 18 g

3 moles of H₂O = 18*3

                          = 54g

Therefore, 3.00 moles contains 54 g of H₂O.

Hope it helps!

[tex]\qquad \qquad\huge \underline{\boxed{\sf Answer}}[/tex]

Here's the solution ~

1 mole of NaCl weigh 58 grams

2 moles of NaCl weigh (58 × 2) = 116 grams

therefore, the correct choice is A.)

[tex]\qquad \sf  \dashrightarrow \: 116 \: g[/tex]

Answer:

I think its three numbers that describe an electron

Explanation:

In chemistry and quantum physics, quantum numbers describe values of conserved quantities in the dynamics of a quantum system. Quantum numbers correspond to eigenvalues of operators that commute with the Hamiltonian—quantities that can be known with precision at the same time as the system's energy—and their corresponding eigenspaces

Answer:

the volume of 4.59 mole of co2 gas at stp is 103L

The radius of rhodium is 19.01nm

Data given;

The mass of the atom can be calculated as

[tex]mass of atom = \frac{atomic mass}{avogadro's number} * 4\\mass of atom = \frac{102.90}{6.023*10^2^3}*4 mass of atom = 6.837*10^-^2^2[/tex]

using the density of the atom

[tex]\rho=mass/volume\\12.4 = \frac{4 * 102.90}{6.023*10^2^3*a^3}\\ a^3= 411.6/7.468*10^2^4\\a^3 = 5.503*10^-^2^3\\a = 3.803*10^-8\\[/tex]

Let's solve for the atomic radius using this;

[tex]a = 2\sqrt{2} r\\r=\frac{a}{2\sqrt{2} } \\r = \frac{3.803*10^-^8}{2\sqrt{2} }\\r = 2.69*10^-8\\r = 19.01nm[/tex]

The radius of rhodium is 19.01nm

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Answer:

Intermission of time used by the geologic history of Earth. 4 examples that are used are eons, eras, periods, epochs.

Explanation:

Answer:

0.78 atm

Explanation:

78% of the gas particles in a given sample of air, it exerts 78% of the pressure.

Answer:

Below:

Explanation:

In the case of water, hydrogen bonds form between neighboring hydrogen and oxygen atoms of adjacent water molecules. The attraction between individual water molecules creates a bond known as a hydrogen bond.

Hope it helps....

It's Ms-Muska..

Answer:

In the case of water, hydrogen bonds form between neighboring hydrogen and oxygen atoms of adjacent water molecules.

The attraction between individual water molecules creates a bond known as a hydrogen bond.

Answer:

I think its between A or c

Explanation:

Answer:

because the question has only ask to find cac03 so it is divided to get answer

Answer:

The empirical formula for a compound is The molar mass of the compound is 93 grams/mole. n=2 is 0

Explanation:

is what I got

Answer:

It may blow your eardrums, or affect your hearing in other ways.

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