Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: Ca^2 , Al^3 ,I^-,S^2-

Answer:

It must be negative, for the reaction to be feasible.

explanation:

Answer: It attracts other water molecules  is a property of water.

Explanation:

A property of a substance where its molecules stick to each other is called cohesion.

For example, water molecules attracts each other because water has the property of cohesion.

Whereas water has high heat capacity.

Water can exist in solid, liquid or vapor form.

Thus, we can conclude that it attracts other water molecules  is a property of water.

Answer

above answer is correct

Explanation:

Answer:

hey friend

how can I help you

The amount of energy needed to freeze 12.5 grams of water into ice is equals to 14.295 kilo joules.

Energy required to freeze water will be calculated by using the following equation as:

Q = mcT, where

m = mass of water = 12.5g = 0.0125kg

c = specific heat of water = 4.187 kJ/kg.K

T = temperature to freeze = 0 degree C = 273.15 K

On putting values we get,

Q = (0.0125)(4.187)(273.15)

Q = 14.295 kJ

Hence required amount of energy is 14.295 kJ.

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The balanced reaction equation is;  2KI(aq)+BaS(aq)→ K2S(aq) + BaI2(aq)

A chemical equation shows the conversion of reactants into products. Recall that in a chemical reactions, reactans interact with each other to yield products.

For the reaction we have in the question,the complete reaction equation is; 2KI(aq)+BaS(aq)→ K2S(aq) + BaI2(aq)

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Answer:

c. Weak acid

Explanation:

Thus the correct answer is option c. Weak acid.

A strong acid would ionize completely, while a base would give off hydroxide ions (OH⁻).

A distillation column is a process unit in which a feed mixture is separated by multiple partial vaporizations.

It should be noted that distillation simply means a process that has to do with the conversion of liquid into vapor.

In this case, distillation column is a process unit in which a feed mixture is separated by multiple partial vaporizations.

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Answer:

0.1 mole of CH₄

Explanation:

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

Volume of CH₄ = 2.24 L

Number of mole of CH₄ =?

The number of mole of CH₄ can be obtained as follow:

Recall:

1 mole of a gas occupy 22.4 L at stp. This implies that 1 mole of CH₄ occupies 22.4 L at stp.

22.4 L = 1 mole of CH₄

Therefore,

2.24 L = 2.24 × 1 mole of CH₄ / 22.4

2.24 L = 0.1 mole of CH₄.

Answer:

1.64 g/mL

Explanation:

Step 1: Calculate the mass of the solid

m(solid+flask) = m(solid) + m(flask)

m(solid) = m(solid+flask) - m(flask)

m(solid) = 48.8565 g - 35.9325 g = 12.9240 g

Step 2: Calculate the mass of water

m(solid+flask+water) = m(solid+flask) + m(water)

m(water) = m(solid+flask+water) - m(solid+flask)

m(water) = 140.8321 g - 48.8565 g = 91.9756 g

Step 3: Calculate the volume occupied by 91.9756 g of water

The density of water is 0.998203 g/mL.

91.9756 g × 1 mL/0.998203 g = 92.1412 mL

Step 4: Calculate the volume occupied by the solid

The 100.00 mL are occupied by the solid and the water.

100.00 mL = V(solid) + V(water

V(solid) = 100.00 mL - V(water)

V(solid) = 100.00 mL - 92.1412 mL = 7.86 mL

Step 5: Calculate the density of the solid

12.9240 g of the solid occupy 7.86 mL.

ρ = 12.9240 g/7.86 mL = 1.64 g/mL

2 KMnO4 (aq) + 5 H2O2 (aq) + 3 H2SO4 (aq) → 5 O2 (g) + 2 MnSO4 (aq) + K2SO4 (aq) + 8 H2O (l)

Answer:

Inertia

Explanation:

According to Galileo, the motion of a projectile can be described according to two principles.

Firstly, he argued that when the projectile is fired, it moves in straight line until it looses its impetus and falls to the ground.

The horizontal motion of the projectile is explained by the theory of inertia. According to Galileo, the two independent motions of the projectile all together leads to a mathematical curve which completely describes the motion of a projectile.

Answer:

Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂

Explanation:

The activity series helps us to easily define whether or not a reaction will occur.

Elements at the top of the activity series are highly reactive and will always displace those at the bottom of the series in any reaction.

With the above information in mind, let us answer the questions given above.

Ag + NaNO₃ —> Na + AgNO₃

The above reaction will not occur because Na is higher than Ag in the activity series. Thus, Ag cannot displace Na from solution.

Pb + Mg(NO₃)₂ —> Pb(NO₃)₂ + Mg

The above reaction will not occur because Mg is higher than Pb in the activity series. Thus, Pb cannot displace Mg from solution.

Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂

The above reaction will occur because Mg is higher than Fe in the activity series. Thus, Mg will displace Fe from solution.

Cu + Mg(NO₃)₂ —> Cu(NO₃)₂ + Mg

The above reaction will not occur because Mg is higher than Cu in the activity series. Thus, Cu cannot displace Mg from solution.

From the above illustration, only

Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂

Will occur.

Answer:

See explanation and image attached

Explanation:

Fischer esterification is a type of reaction used  to convert carboxylic acids to ester in the presence of excess alcohol and a strong acid which acts as a catalyst. Another final product formed in the reaction is water.

The mechanism for the fischer esterification of Benzoic acid and  C H 3 O H in the presence of HCl as the catalyst is shown in the image attached to this answer.

The final products of the reaction are methyl benzoate, water and H^+ as shown in the image attached.

The methyl ester, water, and the acid catalyst (HCl) are byproducts of the Fischer esterification process, which involves protonation, nucleophilic attack, elimination, and deprotonation processes.

Carbonyl oxygen protonation: The carbonyl oxygen of the carboxylic acid (benzoic acid) is protonated by the acid catalyst (HCl) in the first step. The protonation of the carbonyl carbon increases its electrophilicity and promotes the alcohol's nucleophilic assault. Attack by the alcohol's nucleophilic oxygen (methanol, CH3OH) on the protonated carboxylic acid's carbonyl carbon results in the formation of a tetrahedral intermediate. The acid catalyst also helps with this phase. Elimination of water: In the following step, the water molecule must be removed from the tetrahedral intermediate. The hydroxyl group (-OH) from the carboxylic acid and a hydrogen from the hydroxyl group of the alcohol are removed to create this water molecule. Deprotonation: A deprotonation occurs after the removal of water.

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The question is incomplete, the complete question is:

Identify the calculations possible using only 28.02 g/mol as a conversion factor. Select one or more:

(a): Calculate the grams of [tex]N_2[/tex] in 10.58 L of nitrogen gas

(b): Calculate the grams of [tex]N_2[/tex] in [tex]5.03\times 10^{20}[/tex] moles of nitrogen gas

(c): Calculate the moles of [tex]N_2[/tex] molecules in 3.94 grams of nitrogen gas

(d): Calculate the moles of [tex]N_2[/tex] molecules in 4.73 L of nitrogen gas

Answer: The correct options are (b) and (c).

Explanation:

We are given:

Molar mass of [tex]N_2[/tex] = 28.02 g/mol

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]

At STP conditions:

1 mole of gas occupies 22.4 L of volume

For the given options:

(a): Volume is given and to calculate the mass of [tex]N_2[/tex], we need to use both the conversion factors above.

The equation formed will be:

Mass of [tex]N_2[/tex] = [tex]\frac{1mol}{22.4L}\times 10.58L\times 28.02 g/mol[/tex]

(b): Moles are given and to calculate the mass of [tex]N_2[/tex], we need only the first conversion factor.

The equation formed will be:

Mass of [tex]N_2[/tex] = [tex](5.03\times 10^{20}mol)\times 28.02g/mol[/tex]

(c): Mass is given and to calculate the moles of [tex]N_2[/tex] molecules, we need only the first conversion factor.

The equation formed will be:

Moles of [tex]N_2[/tex] molecules = [tex]\frac{3.94 g}{28.02g/mol}[/tex]

(d): Volume is given and to calculate the moles of [tex]N_2[/tex] molecules, we need only the second conversion factor.

The equation formed will be:

Moles of [tex]N_2[/tex] molecules = [tex]\frac{1mol}{22.4L}\times 4.73L[/tex]

Hence, the correct option is (b) and (c)

Using only 28.02 g/mol as a conversion factor, we can:

We want to identify the conversion factors required in a series of calculations.

A conversion factor is an arithmetical multiplier for converting a quantity expressed in one set of units into an equivalent expressed in another.

28.02 g/mol, which is the molar mass of nitrogen, is a conversion factor to convert moles to mass and vice versa.

We want to convert 10.58 L (volume) to grams (mass). We need to conversion factors:

We want to convert 5.03 × 10²⁰ moles (moles) to grams (mass). We can do so by just using 28.02 g/mol as the conversion factor.

We want to convert 3.94 grams (mass) to moles. We can do so by just using 28.02 g/mol as the conversion factor.

We want to convert 4.73 L (volume) to moles. The required conversion factor is 22.4 L/mol.

Using only 28.02 g/mol as a conversion factor, we can:

The question is incomplete, the complete question is:

Identify the calculations possible using only 28.02 g/mol as a conversion factor. Select one or more:

(a): Calculate the grams of N₂ in 10.58 L of nitrogen gas.

(b): Calculate the grams of N₂ in 5.03 × 10²⁰ moles of nitrogen gas.

(c): Calculate the moles of N₂ molecules in 3.94 grams of nitrogen gas.

(d): Calculate the moles of N₂ molecules in 4.73 L of nitrogen gas.

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Answer:

A

Explanation:

A P E X

Answer:

Cu

Explanation:

Copper since it is more reactive than Iron. Hence, it can easily displace ions in an iron based compound.

Answer:

1,2, and 3 are correct.

Explanation:

1 is true because cellular respiration begins in the cytoplasm of a cell. 2 is true because cellular respiration releases energy aerobically which uses glucose and oxygen or anaerobically which just uses glucose. Either way, energy is being released. 3 is true, I don't know how to explain why. Just keep the cellular respiration equation in mind, (C6H12O6 + 6O2 → 6CO2 + 6H2O + Chemical Energy (in ATP)), the chemical reactions are basically summed up into an equation. Hope that helped.

Answer:

[tex]Y=63.1\%[/tex]

Explanation:

Hello there!

In this case, according to the given chemical reaction:

[tex]4C_2H_3Cl + 7O_2 \rightarrow 8CO + 6H_2O + 2Cl_2[/tex]

It turns out possible for us to realize about the 7:8 mole ratio of O2 to CO, and therefore, the theoretical yield of the latter is calculated via stoichiometry:

[tex]m_{CO}=57.8gO_2*\frac{1molO_2}{32.0gO_2}*\frac{8molCO}{7molO_2} *\frac{28.01gCO}{1molCO} =57.82gCO[/tex]

Finally, the percent yield is calculated by dividing the actual yield, 36.5 g by the just computed theoretical one:

[tex]Y=\frac{36.5g}{57.8g} *100\%\\\\Y=63.1\%[/tex]

Regards!

Answer:

Explanation:

The chemical reaction of the well-balanced equation is as follows:

[tex]\mathbf{2NiCl_{2(aq)}+2Na_2S_{(aq)} \to 4NaCl_{(aq)}+2NiS_{s}}[/tex]

The aforementioned reaction's ionic equation is:

[tex]\mathbf{2Ni^{2+}_{(aq)}+4Cl^-_{(aq)}+ 4Na^+_{(aq)}+2S^{2-}_{(aq)} \to 4Na^+_{(aq)}+4Cl^-_{(aq)}+2NiS_{(s)}}[/tex]

From above; Na⁺ and Cl⁻ appear on both sides;

Hence, the net ionic equation is:

[tex]\mathbf{2Ni^{2+}_{(aq)}+2S^{2-}_{(aq)} \to 2NiS_{(s)}}[/tex]

Answer:

F₂ + 2At --> 2AtF

Explanation:

Astatine is a halogen but is not diatomic. It's possible oxidation states are 1⁺, 1⁻, or 5⁺. Fluorine only has the possible oxidation states of 1⁺ or 1⁻.

Answer:

0.278 mol

Explanation:

Step 1: Given and required data

Mass of acetic acid (m): 16.7 g

Chemical formula of acetic acid: CH₃COOH (C₂H₄O₂)

Step 2: Calculate the molar mass (M) of acetic acid

We will use the following expression.

M(C₂H₄O₂) = 2 × M(C) + 4 × M(H) + 2 × M(O)

M(C₂H₄O₂) = 2 × 12.01 g/mol + 4 × 1.01 g/mol + 2 × 16.00 g/mol = 60.06 g/mol

Step 3: Calculate the number of moles (n) of acetic acid

We will use the following expression.

n = m/M

n = 16.7 g/(60.06 g/mol) = 0.278 mol

Answer:

n = 3.1 moles

Explanation:

Given that,

The volume of a balloon, V = 5.1 L

Pressure, P = 1.1 atm

Temperature, T = 22 K

We need to find the number of moles are required to fill the balloon. We know that,

Gas law, PV = nRT

Where

R is gas constant, R = 0.08206 L-atm/mol-K

So,

[tex]n=\dfrac{PV}{RT}\\\\n=\dfrac{1.1\times 5.1}{0.08206 \times 22}\\\\n=3.1[/tex]

So, there are 3.1 moles of helium are required.

The moles of helium are required to fill a 5.10 L ballon to a pressure of 1.1 atm at 22 Kelvin is 3.1 moles.

Moles of gases will be calculated by using the ideal gas equation as:

PV = nRT, where

P = pressure of gas = 1.1 atm

V = volume of gas = 5.10 L

R = universal gas constant = 0.08206 L-atm/mol-K

T = temperature of gas = 22K

n = moles of gas?

On putting all these values in the above equation and calculate for the value of n as:
n = 1.1 × 5.10 / 0.082 × 22 = 3.1 moles

Hence, the required moles is 3.1 moles.

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The reaction between hydrogen ion and hydroxide ion will be as follows.

so, ratio between hydrogen and hydroxide ions is 1 : 1.

Therefore, moles of  = volume × concentration of

                            =

                             = 0.06 mol

Similarly, moles of  = volume × concentration of

                              =

                             = 0.1 mol

Therefore, ratio of moles of hydrogen and hydroxide ions is as follows.

                                    0.06 : 0.1

                                 = 0.6 : 1

As, hydroxide ions are present in excess so, hydrogen ions are the limiting reagent.

Hence, moles of water formed = moles of  ions = 0.06 mol.

So,    heat released = moles of

                               = 0.062 × 62.0 kJ/mol

                               = 3.72 kJ

                               = 3.72 × 1000 J

                               = 3720 J

Let T is the initial temperature. So,

             Heat released = Heat absorbed by the solution

                                      =

           3720 J =

                         T =

Thus, we can conclude that initial temperature is .                          

there is an absence of presence of variables:(

Answer:

I HOPE THIS HELPS

Explanation:

Answer:

See explanation

Explanation:

We must remember that the energy required to move an electron from the 1s orbital to a higher energy level depends on the size of the nuclear charge.

The higher the nuclear charge, the more closely held the 1s electron of the atom is to the nucleus and the more difficult it is to excite this electron.

Hence, it requires more energy to excite the 1s electron of silver having a larger size of nuclear charge than it is to excite a 1s electron in lithium.