The Lewis dot notation for two atoms is shown.

Na is written with a dot on its right. Cl is written on the right of Na. There are seven dots around Cl. An arrow points from the dot near Na to Cl.

What is represented by this notation?

Answer:

See below.

Explanation:

Chlorine gas replaces the bromine in  potassium bromide to form potassium chloride and bromine liquid is released.

The equation for the reaction is:

Cl2 (g) + 2KBr (s) = KCl  (s) + Br2 (l).

This reaction occurs because chlorine is more reactive then bromine.

Answer:

=1.36kg

Explanation:

First heat is absorbed to melt the ice- latent heat of fusion of ice then heat is absorbed to raise the temperature to 373K

The specific heat capacity of water is 4.187kJ/kg/K while  the latent heat of fusion of ice is 2230kJ/kg/K.

Letting the mass of the ice to be =x

x×2230kJ/kg/K + x×4.187kJ/kg/K×100K= 3600kJ

2230x+418.7x=3600

2647.8x=3600

x=1.36 kg

Answer:

the answer is

n = 0.01336 mol

Explanation:

To determine the number of moles of a gas, we need to have an expression that relates the pressure, temperature and volume of the system. For simplification, we assume that this gas is ideal so we use the equation PV=nRT. We calculate as follows:

PV=nRT

n = PV / RT

n = 235000(1.48x10^-4) / (8.314)(40+273.15)

n = 0.01336 mol

Answer : The correct option is, (B) [tex]1.34\times 10^2mol[/tex]

Explanation :

To calculate the moles of nitrogen gas we are using ideal gas equation:

[tex]PV=nRT[/tex]

where,

P = pressure of nitrogen gas = 235 kPa = 2.319 atm

Conversion used : (1 atm = 101.325 kPa)

V = volume of nitrogen gas = [tex]148cm^3=148mL=0.148L[/tex]

Conversion used : (1 L= 1000 mL)

T = temperature of nitrogen gas = [tex]40.0^oC=273+40.0=313K[/tex]

R = gas constant = 0.0821 L.atm/mole.K

n = moles of nitrogen gas = ?

Now put all the given values in the ideal gas equation, we get:

[tex](2.319atm)\times (0.148L)=n\times (0.0821L.atm/mole.K)\times (313K)[/tex]

[tex]n=0.0134mol=1.34\times 10^2mol[/tex]

Therefore, the number of moles of nitrogen gas are, [tex]1.34\times 10^2mol[/tex]

Answer:

Water

Explanation:

Strong electrolytes will completely ionize in water, and water cannot do that to itself.

which is not a strong electrolyte?

water

Answer: C EXOTHERMIC

Explanation:

Answer: C

Explanation:

Answer:

Matter is something that is made of atoms like a liquid, solid, or gas and energy is when water becomes a gas and the energy starts to get faster to where there is steam because the gas is being trapped inside the pot or any other object.

Explanation:

Answer:

1.  C. helium

2.  D. oxygen and acetylene

3.  B.  deliquescence

4.  C.  cutting very hard surfaces

5.  B.  3.5%

Explanation:

Object A will have a positive charge since it is losing electrons. And object B would have a negative charge since its gaining electrons. For example, magnesium atom is object A and chloride atom is object B. Magnesium atom gives an electron away to the chloride atom. Therefore the chloride atom will have a negative charge of one and magnesium has a positive charge of 1.

The answer is A. Object A will have a positive charge.

the second law of thermodynamics

Answer:

237.2 mL.

Explanation:

(XMV) acid = (XMV) base.

where, X is the no. of (H) or (OH) reproducible in acid or base, respectively.

M is the molarity of the acid or base.

V is the volume of the acid or base.

(XMV) HCl = (XMV) NaOH.

For HCl; X = 1, M = 0.5 M, V = ??? mL.

For NaOH, X = 1, M = 1.54 M, V = 77.0 mL.

∴ V of HCl = (XMV) NaOH / (XV) HCl = (1)(1.54 M)(77.0 mL) / (1)(0.5 M) = 237.2 mL.

Answer:

Concentration cells have the same substance for both anode and cathode.

Explanation:

Plato

The correct statement about concentration cell is concentration cells have the same substance for both anode and cathode. The correct option is D.

Anode is the negative terminal of the cell in which the electrons are released or reduced.

The cathode is the positive terminal where the electrons are accepted, here oxidation occurs.

Thus, the correct option is D. Concentration cells have the same substance for both anode and cathode.

Learn more about anode and cathode

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Because the model makes the concepts easier to understand.

Answer:

A. because the model makes the concepts easier to understand

Edge.2023

Explanation:

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Final answer:

The correct statement is that in a concentration cell, the reactions are the same but the concentrations are different, which results in a cell potential greater than 0.00 volts until equilibration.

Explanation:

The correct statement about concentration cells is: The concentrations are different and the reactions are the same, so the cell potential is not 0.00 volts. Essentially, concentration cells consist of two half-cells with identical electrodes and the same redox active species at different concentrations. The standard electrode potential (E°) in a concentration cell is zero because the electrodes are identical; however, there is a potential difference, calculated with the Nernst Equation, due to varying concentrations. As the reaction in a concentration cell proceeds, the concentrations equilibrate and the cell potential (ΔEcell) decreases until the concentrations become equal and ΔEcell reaches zero.

Answer:

the reaction with the hydrochloric acid and the sodium hydroxide gives you HCl + NaOH which gives you H2O + NaCl.

Explanation:

Balance the chemical equation. Balancing the neutralization reaction involves the process of making sure that there is an equal number of moles of each of the elements on both sides of the equation.

A 1.00-ounce bottle holds approximately 0.0295 liters of liquid, by converting ounces to quarts (1.00 ounce / 32 ounces), and then quarts to liters (the resulting number of quarts / 1.06).

Given that there are 32 ounces in 1 quart and 1.06 quarts in 1 liter, we can first convert ounces to quarts, and then quarts to liters. So, if we have 1.00 ounce, we simply divide this number by 32 to get the equivalent in quarts. The answer is about 0.03125 quarts. Then, we convert quarts to liters by dividing the number of quarts obtained by 1.06, yielding approximately 0.0295 liters.

Thus, a 1.00-ounce bottle would hold about 0.0295 liters of liquid.

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Answer:

[H⁺] = 3.548 x 10⁻⁴ M.

Explanation:

∵ pH = -log[H⁺]

∴ 3.45 = -log[H⁺]

log[H⁺] = -3.45

∴ [H⁺] = 3.548 x 10⁻⁴ M.

To find the hydrogen ion concentration from a pH of 3.45, calculate 10 to the power of negative pH, resulting in a hydronium ion concentration of approximately 3.55 × 10-4 M.

To calculate the hydrogen ion concentration for an aqueous solution with a pH of 3.45, we can use the definition of pH which is pH = -log[H3O+]. We need to reverse the process to find the concentration of hydronium ions (H3O+). This is done by taking the antilog (inverse log) of the negative pH value.

First, we reverse the sign of the pH to get -3.45. Using a calculator, we enter -3.45 and then press the 10x or exp button to find the concentration of H3O+. The result is that [H3O+] = 10-3.45 M, which calculates to approximately 3.55 × 10-4 M.

Answer:

grease fire. The others are solids that will easily be put out with water.

Answer:

grease fire

Explanation:

DOING THAT WILL JUST MAKE IT WORSE

hope it helps

The answer is B :))))

If more hydrogen gas is added to the reaction mixture, there will be a shift toward the reactants. Therefore, the correct option is option B.

Le Chatelier's principle, sometimes referred as Chatelier's concept, is indeed a chemical concept that predicts how changes in conditions would impact chemical equilibria. The idea is named for Karl Ferdinand Braun and, on occasion, French scientist Pierre Louis Le Chatelier, who independently discovered it.

When a concentration, temperature, volume, or pressure increase is applied to a simple system in thermodynamic equilibrium, it moves to a new equilibrium. The earlier alteration is somewhat cancelled out by this new equilibrium.  If more hydrogen gas is added to the reaction mixture, there will be a shift toward the reactants.

Therefore, the correct option is option B.

To know more about Le Chatelier's principle, here:

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Answer:

Ionic Bonding: The formation of an Ionic bond is the result of the transfer of one or more electrons from a metal onto a non-metal.

Covalent Bonding: Bonding between non-metals consists of two electrons shared between two atoms.

Explanation:

Answer:

The right choice is "nuclear power "

Explanation:

Human activities like burning coal for warming or for using in industries, heat our homes with oil, or switching on our natural gas stoves for cooking produce carbon dioxide gas and other gases (i.e. greenhouse gas) responsible for global warming .

while, nuclear power doesn't contribute to the universe with any of this greenhouse gas

So, the right choice is "nuclear power "

The answer is:

The new temperature of the gas is equal to 388.22 K

Since we have a rigid container, we can safely assume that the volume is kept constant.

To solve the problem, we need to use the Gay Lussac's Law, which states that the pressure and the volume of an ideal gas are proportional  when the volume is kept constant.

Also, we need to remember that Gay Lussac's Law works with absolute temperature, so, we need to convert the given temperature (in celsius degrees) to Kelvin.

[tex]T(K)=273.15 + T(\°C)\\\\T(K)=273.15 +25=298.15K[/tex]

So, using the Gay Lussac's equation, we have:

[tex]\frac{P_1}{T_1}=\frac{P_2}{T_2}[/tex]

Where,

[tex]P_1[/tex] is equal to the first pressure.

[tex]T_1[/tex] is equal to the first temperature.

[tex]P_2[/tex] is equal to the new pressure.

[tex]T_2[/tex] is equal to the new temperature.

We are given the following information:

[tex]P_1=0.96atm[/tex]

[tex]T_1=298.15K[/tex]

[tex]P_2=1.25atm[/tex]

Then, substituting and calculating, we have:

[tex]T_2=P_2*\frac{T_1}{P_1}\\\\T_2=1.25atm*\frac{298.15K}{0.96atm}=388.22K[/tex]

Hence, the new temperature of the gas is equal to 388.22 K.

Have a nice day!

Answer: the person up there had the correct answers so far, but didn’t complete it, but after converting it , finish it .

temperature in celcius - 388 K - 273 = 115 °C

answer is C. 115 °C

Answer:

Cross-pollination

Explanation:

This technique is used to create new varieties, usually with stronger characteristics than the two original varieties. When the pollen of one variety is placed to a different plant's stigma, the resulting seeds create a new variety. This cross-pollination is used in plants of the same species.  

Answer:

Crossbreeding

Explanation:

apex

Answer:

The missing pieces of the nuclear equation are:

Explanation:

1) Given nuclear reaction:

[tex]^9_4Be+^1_1H->^A_ZX+^4_2He[/tex]

2) A: mass number:

Balance the mass numbers of both sides of the nuclear reaction.

The mass number is the superscript to the left of the chemical symbol:

3) Z: atomic number

Balance the atomic numbers of both sides of the nuclear reaction

The atomic number is the subscript to the left of the chemical symbol:

4) Identity of the element.

The atomic number, which is the number of protons, identifies the unknown element: X.

You can find this information in a periodic table.

The element with atomic number 3 is lithium, and its chemical symbol is Li, hence X = Li.

A gas deviates most from the ideal gas law at low temperatures and high pressures due to the increased significance of molecule volume and intermolecular attractions.

A gas will be least likely to exhibit the ideal gas properties predicted by the ideal gas law under conditions of low temperatures and very high pressures. At high pressures, gas molecules are forced closer together, which means they occupy a more significant volume relative to the space they are in, challenging the assumption that their volume is negligible. At low temperatures, the decreased kinetic energy of the gas particles means that intermolecular attractions become more significant, further deviating from ideal behavior.

Nonrenewable resources are those found inside the earth, and they took millions of years to form. These include the fossil fuels, oil, natural gas, and coal and nuclear energy

the very bottom of the ocean and they are relevant by most of the animals feed off of the animals that come out of he vents

Answer:No charge

Explanation:

Cu3PO4 is an ionic compound which my definition has no charge (or a charge of 0). But if you are referring to the ions themselves that make up the compound, PO4 is a polyatomic ion so you can look up its charge in a polyatomic ion chart (it is 3-). Thus since there are 3 Cu's per PO4^3-, each Cu must have a charge of 1+.

The charge of Cu3PO4 is neutral, and each Cu ion in the molecule carries a +1 charge to balance the -3 charge from the phosphate ion.

The compound Cu3PO4 is made up of Cu (Copper) and PO4 (Phosphate) ions. When these ions bind to form an ionic compound such as Cu3PO4, the total charge of the compound should be neutral.

The charge of Cu3(PO4)2 is +2.

In this case, phosphate has a charge of -3, and for the molecule to be neutral, the total charge from the 3 Copper ions must be +3, making the charge of each Cu (Copper) ion as +1.

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Answer: It's the first one,

A temperature change in a reaction indicates a chemical change

A temperature change in a reaction indicates occurrence of chemical change.

In chemistry, two types of reaction are always witnessed. One is physical reaction whereas the other is chemical reaction. In a chemical reaction, there is an adjustment in the organization of the substances whereas in a physical change there is a distinction in the appearance, smell, or straightforward showcase of an example of issue without an adjustment in structure.

At the point when bonds are broken and new ones are shaped, a compound change happens. The following happenings indicate the chemical change:

Answer: Each ion is surrounded by water molecules

Explanation: The ions are surround by the water molecules which act as a barrier around the ions and prevent the recombination of ions. The ions are said to be hydrated.

Answer:

Each ion is surrounded by water molecules.

Explanation:

During dissolution of ionic solute in water the following process occur

a) Breaking of molecule into separate ions (need lattice energy)

b) hydration of each ion by water molecules (hydration energy is released)

c) due to hydration the ions of solutes further become far from each other.

There is no breaking of water molecule or the ions do not combine to form molecule.