In a galvanic cell with a calomel electrode and a sliver electrode, what would happen if you connected the calomel and silver electrodes directly? the solution in the Calomel half cell is KCl solution, Hg2Cl2(s), and Hg(l). there is Ag+ solution in the Ag+ half cell.

Bruce needs to mix 20 ml of the 10% alcohol solution with 30 ml of the 15% alcohol solution to make 50 ml of a 12% alcohol solution.

To determine the quantities of the 10% and 15% alcohol solutions that Bruce needs to mix, we can set up an equation based on the concentration and volume.

Let's assume that Bruce needs to mix x ml of the 10% alcohol solution and (50 - x) ml of the 15% alcohol solution.

The concentration of the 10% alcohol solution can be represented as 0.10x (since 10% is equivalent to 0.10) and the concentration of the 15% alcohol solution can be represented as 0.15(50 - x).

To achieve a 12% concentration in the final solution, the equation can be set up as follows:

0.10x + 0.15(50 - x) = 0.12(50)

Simplifying the equation, we get:

0.10x + 7.5 - 0.15x = 6

Combining like terms, we have:

-0.05x = -1.5

Dividing both sides by -0.05, we find:

x = 30

Therefore, Bruce needs to mix 20 ml of the 10% alcohol solution with 30 ml of the 15% alcohol solution to make 50 ml of a 12% alcohol solution.

Learn more about alcohol

brainly.com/question/29268872

#SPJ11

Answer:

Hcl Answer

Explanation:

may be this helpful!

Answer:

Cause: The electrostatic bonds among ions in a lattice only hold them together like two magnets with unlike poles facing each other. The water molecules can split them through the similar process with several molecules ganging up on them, the H+ parts of the molecules attracts the anion and O2- part; the cations. If this electrostatic attraction is big enough, the bonds between the solid's ions break (into separate ions). And so the solid dissolves. This is usually the case with most.

Why not covalent structures?: Sure, covalent solids have a low m.p and b.p for low intermolecular forces, the covalent bonds here are strong and cannot easily be 'pulled apart' by water molecules. They usually have stronger intermolecular forces than that of water.

But... if their intermolecular forces are weaker or similar, sure they can dissolve easily. Like any often-used alcohol (glacial).

If you started with 1.5 moles of H2 at STP, you would have approximately 33.6 liters of volume of hydrogen (H₂) gas.

To determine the number of liters of H2 you have, we need to consider the conditions under which the gas is being held (i.e. temperature and pressure), as well as the molar volume of H2 at those conditions.

At standard temperature and pressure (STP), which is 0°C (273.15 K) and 1 atm (101.325 kPa), the molar volume of any ideal gas is approximately 22.4 L/mol.

Therefore, at STP, 1.5 moles of H₂ would occupy approximately:

V = n x Vm = 1.5 mol x 22.4 L/mol = 33.6 L

Learn more about volume of gas here: https://brainly.com/question/25736513

#SPJ1

The complete question is below:

HOW MANY LITERS OF H2 DO YOU HAVE IF YOU START WITH 1.5 MOLES OF H2? (assume STP condition)

Answer:

D.

Explanation:

Hydroxide ions are produced when acid reacts with a base under a Ph value of more than 7. Hydroxide ions are negatively charged ions which are released in the aqueous solution during titration process. It a oxygen and hydrogen atom covalent bond.

Answer:

1.24

Explanation:

According to the concept of significant figures, rounding off to  3 significant figures gives 1.24.

Significant figures are used for establishment  of a number which is presented in the form of digits. These digits give a meaningful representation  to the numbers.

The significant figures are the significant digits which convey the meaning according to the accuracy. These provide precision to the numbers and hence are called as significant numbers.There are rules for counting significant figures which are as follows:

1)All non-zero digits are significant .

2)All zeroes which occur between non-zero digits are significant.

3)All zeroes to the left and right of  a non-zero digit are not significant.

4) All zeroes on right  of decimal are significant if a non-zero number follows them.

5)All zeroes on right side of non-zero digit are significant.

Learn more about significant figures,here:

https://brainly.com/question/29153641

#SPJ7

Answer:

About 164 grams

Explanation:

The molecular formula of calcium nitrate is \(Ca(NO_3)_2\). The molar mass of calcium is about 40, while the molar mass of nitrogen is about 14 and oxygen is about 16. Therefore, the molar mass of it is:

\(40+2(14+3(16))=40+2(14+48)=40+124=164\)

Hope this helps!

4500+3000=

7500grados

If the solution appears green, it is absorbing light in the red part of the visible spectrum. Option A is correct.

The color of a solution is determined by the wavelengths of light that are transmitted or reflected by the solution. A solution that appears green is absorbing light in the red part of the spectrum and transmitting or reflecting light in the blue and green parts of the spectrum.

This is because green light is a combination of blue and yellow light, and if a solution appears green, it must be absorbing light in the red part of the spectrum, which is opposite to green on the color wheel.

If the solution appears violet, it is absorbing light in the yellow part of the visible spectrum.

If the solution appears red, it is absorbing light in the green part of the visible spectrum.

If the solution appears blue, it is absorbing light in the orange part of the visible spectrum.

Overall, the color of a solution can provide valuable information about the types of molecules or ions present in the solution and their electronic structures.

Hence, A. solution appears green is the correct option.

To know more about spectrum here

https://brainly.com/question/3997802

#SPJ4

Balanced equation

2Pb(NO₃)₂⇒2PbO+4NO₂+O₂

Given

Reaction

Pb(NO₃)₂⇒PbO+NO₂+O₂

Required

Balanced equation

Solution

Pb(NO₃)₂⇒aPbO+bNO₂+cO₂

Pb, left=1, right=a⇒a=1

N, left=2, right=b⇒b=2

O, left=6, right=a+2b+2c⇒6=1+2.2+2c⇒6=5+2c⇒1=2c⇒c=1/2

The reaction becomes :

Pb(NO₃)₂⇒PbO+2NO₂+1/2O₂ x2

2Pb(NO₃)₂⇒2PbO+4NO₂+O₂

To disinfect the dialysis station, you should mix a solution of 1:100 dilution of sodium hypochlorite (bleach) with water.

1. Gather the necessary supplies: sodium hypochlorite (bleach) and water.
2. Determine the desired volume of disinfectant solution needed to thoroughly clean the dialysis station.
3. Measure out the appropriate amount of bleach by dividing the desired volume by 100 (e.g., if you need 1000 mL of solution, use 10 mL of bleach).
4. Add the measured bleach to the remaining volume of water needed to reach the desired total volume (e.g., 990 mL of water in the example above).
5. Mix the bleach and water thoroughly to create a 1:100 bleach solution.
6. Use this solution to disinfect the dialysis station, following your facility's protocol and ensuring all surfaces are cleaned properly.

To learn more about sodium hypochlorite(bleach) https://brainly.com/question/20184780

#SPJ11

If a beaker of tetrahydrofuran is put inside a sealed tank containing tetrahydrofuran gas at 63 degrees Celsius and 810 torr, after ten minutes, the liquid in the beaker will evaporate and the amount of liquid in the beaker will decrease.

This is due to the fact that at a higher temperature and pressure, the vapour pressure of the liquid tetrahydrofuran in the beaker will increase, which means that more molecules of tetrahydrofuran will escape from the liquid phase into the gas phase. This process is known as evaporation. As more molecules of tetrahydrofuran evaporate from the liquid in the beaker, the amount of liquid in the beaker will decrease.

The pressure inside the tank is 810 torr and this pressure is greater than the vapour pressure of tetrahydrofuran at 63 degrees C, meaning that the vapour pressure of the liquid tetrahydrofuran will be less than the pressure inside the tank, it will escape to the gas phase, therefore the amount of liquid in the beaker will decrease.

Learn more about Evaporation here: https://brainly.com/question/5019199

#SPJ4

Answer:

80.7 °C

Explanation:

Step 1: Given and required data

Step 2: Calculate the final temperature of the water

We will use the following expression.

Q = c × m × (T₂ - T₁)

T₂ = Q / c × m + T₁

T₂ = -1,200 J / (4.184 J/g.°C) × 20.0 g + 95.0 °C = 80.7 °C

Answer:

81 C

Explanation:

The specific heat of aluminum is 0.9025 18°C. 451 J heat(Q) is released when a 10.0 g piece of aluminum foil is taken out of the oven and cools from 100.0° to 50.0°. Therefore, option A is correct.

The amount of heat needed to increase a substance's temperature by one degree Celsius in one gramme, also known as specific heat. Typically, calories or joules per gramme per degree Celsius are used as the units of specific heat.

For example, the specific heat of water is 1 calorie (or 4.186 joules) per gram per Celsius degree.

The specific heat of aluminium tells you the amount of energy needed to increase the temperature of 1 g of aluminium by 1°C.

You can thus say that in order to increase the temperature of 1 g of 0.9025 aluminium by 1∘C, you need to supply it with 11.5 cal of heat.

100°C - 50°C = 50°C

= 451J

Thus, 451 J heat(Q) is released when a 10.0 g piece of aluminum foil is taken out of the oven and cools from 100.0° to 50.0°. option A is correct.

To learn more about the specific heat, follow the link;

https://brainly.com/question/11297584

#SPJ6

Your question is incomplete. most probably complete question was

The specific heat of aluminum is 0.9025 J/g°C. How much heat(Q) is released when a 10.0 g piece of aluminum foil is taken out of the oven and cools from 100.0° to 50.0°?

451 J

45.1 J

400 J

Taking into account the change of units, the number of picoliters in 6.52×10⁵ mL is 6.52×10¹⁴ picoliters.

In first place, the rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other), the direct rule of three must be applied as follow, being a, b and c known data and x the variable to be calculated:

a ⇒ b

c ⇒ x

So: x= (c×b)÷ a

The direct rule of three is the rule applied in this case where there is a change of units.

The change of units is done by the following rule of three: if 1 mL is equivalent to 1×10⁹ picoliters, 6.52×10⁵ mL is equal to how many picoliters?

1 mL ⇒ 1×10⁹ picoliters

6.52×10⁵ mL ⇒ x

So:

x=(6.52×10⁵ mL×1×10⁹ picoliters)÷ 1 mL

Solving:

x= 6.52×10¹⁴ picoliters

Finally, the volume in picoliters is 6.52×10¹⁴ picoliters.

Learn more about change of units:

brainly.com/question/18427482

#SPJ1

The substances that will solidify before the temperature reaches 0°C are nitrogen and butane.

Both nitrogen and butane have freezing points that are below 0°C, while the freezing points of benzene and water are above 0°C.

Nitrogen has a freezing point of -210°C, which means that it will solidify at a much higher temperature than 0°C. Similarly, butane has a freezing point of -138°C, which is also much lower than 0°C.

Therefore, both nitrogen and butane will solidify before the temperature reaches 0°C.Benzene and water, on the other hand, have freezing points that are above 0°C.

Benzene has a freezing point of 5.50°C, which is higher than 0°C, while water has a freezing point of 0°C.

Therefore, neither of these substances will solidify before the temperature reaches 0°C.

In summary, the substances that will solidify before the temperature reaches 0°C are nitrogen and butane, while benzene and water will not solidify until the temperature drops below their respective freezing points.

For more such questions on butane

https://brainly.com/question/6328164

#SPJ8

When the compound CH3CH3CH2CH2OH undergoes gentle oxidation, the product formed is 3,3-dimethylbutanal.

Here's a step-by-step explanation:

1. Identify the functional group present in the compound. In this case, it's an alcohol group (-OH) attached to the carbon chain.
2. Determine the type of alcohol: primary, secondary, or tertiary. The carbon attached to the -OH group is bonded to two methyl groups (CH3), making it a secondary alcohol.
3. For gentle oxidation of a secondary alcohol, the product will be a ketone.
4. Identify the correct ketone formed by replacing the -OH group with a double bond oxygen (=O) on the secondary carbon. This results in the structure: CH3CH3C(=O)CH2CH3.
5. Name the ketone using IUPAC nomenclature: 3,3-dimethylbutanal.

So, the correct answer is 3,3-dimethylbutanal.

To know more about dimethylbutanal visit:

https://brainly.com/question/30874460

#SPJ11

Step 1

pH is defined as:

------------

Step 2

pH = 8.3 =>

Answer: C.

Answer:1. How many moles is 400.0 g of Al 2(SO4)3?

Mol = mass/molar mass

Mol = 400.0g/342g/mol = 1.169 mol

2. Which is the percent composition of bromine in the compound NaBr?

% Br = (mass Br/mass NaBr) x 100

% Br = (79.90g/102.88g) x 100 = 77.7%

3.How many molecules are in 3.6 grams of NaCl?

Molecules NaCl = 3.6g NaCl x 6.02 x 1023 NaCl molecules = 3.7 x 1022 molecules

58.43g NaCl

4.How many grams are in 1.946 moles of NaCl?

From Mol = mass/molar mass,

Mass = mol x molar mass

Mass NaCl = 1.946 mol x 58.43 g = 113.7 g

Explanation:

To determine the mass of 7.51 x 10^23 molecules of water, we need to use the molar mass of water (H2O), which is approximately 18.015 g/mol.

The given quantity represents the number of water molecules, and we can convert it to moles using Avogadro's number (6.022 x 10^23 molecules/mol).

Moles of water = (7.51 x 10^23 molecules) / (6.022 x 10^23 molecules/mol) ≈ 1.246 mol

To calculate the mass, we multiply the number of moles by the molar mass:

Mass = Moles x Molar mass = 1.246 mol x 18.015 g/mol ≈ 22.45 g

Therefore, approximately 22.45 grams of water are present in the beaker with 7.51 x 10^23 molecules.

Learn more about molecules of water here:

https://brainly.com/question/22298555

#SPJ11

The pH of the resulting solution is 10.89.

One may determine the pH of a solution by knowing the hydrogen ion concentration in molarity (M). The pOH value, which may also be used to determine the pH of a solution, is influenced by the concentration of the h+ ions. The pH of the mixture is 10.89.

Anything that has a pH of 7.0 or less is acidic, while everything that has a pH of 7.0 or more is alkaline or basic. The pH scale, which goes from 0 (very acidic) to 14 (very basic/alkaline), contains all pH values for typical materials.

volume1 = 25 ml = 25\1000 = 0.025lit

volume 2= 15ml = 15/1000 = 0.015lit

\(n_{CH_{3}NH_{2} } = 0.432M*0.025Lit\)

              = 0.0108 moles

\(n_{HCL} = 0.234M*0.015Lit\)

         = 0.00351moles

\(CH_{3} NH_{2} + H_{3} O\)  ⇆  \(CH_{3} N^{+}H _{3} +H_{2} O\)

Initial charge of \(CH_{3} NH_{2}\) = 0.0108-0.00351 = 0.00729

Initial charge of \(CH_{3} N^{+}H _{3}\) = 0+0.00351

\(pH= 14-(p^{xb} +log\frac{[CH_{3}N^{+} H_{3}] }{[CH_{3}NH_{2} ]} )\)

       \(= 14-(3.43+Log(\frac{0.00351}{0.00729} )\)

       = 10.89

The pH of the resulting solution is 10.89      

Learn more about pH here:

https://brainly.com/question/17329058

#SPJ4

The given statement is True. An acid-base indicator is a substance that changes color in response to changes in the pH of a solution.

During a titration, the purpose of the indicator is to signal the endpoint of the reaction, when all of the analyte (the substance being titrated) has reacted with the titrant (the substance used to titrate the analyte). An indicator that changes color in response to changes in the pH of the solution provides a visual indication of when the reaction has reached completion, allowing the student to determine the precise volume of titrant required to reach the endpoint.

For an indicator to work well in a titration, it should have a distinctive and easily visible color change at the endpoint of the reaction. The endpoint of the reaction is typically a specific pH value that corresponds to the equivalence point of the reaction, when all of the analyte has reacted with the titrant. The indicator should also have a narrow transition range, meaning that the color change should occur over a relatively small range of pH values near the equivalence point, so that the endpoint can be accurately determined.

Learn more about titration here:

https://brainly.com/question/2728613

#SPJ4

Answer:

1. 2Na + 2HCl = 2NaCl =H2

2. 2Mg + O2 = 2MgO

Explanation:

make sure that the number of atoms of each element is the same on each side of the equation  

1. 2Na + 2HCl = 2NaCl =H2

on LHS of equation,

Na = 2

H = 2

Cl =2

On RHS of equation,

Na=2

H= 2

Cl =2

2. 2Mg + O2 = 2MgO

on LHS of equation,

Mg = 2

O2 = 2

On RHS of equation,

Mg = 2

O2 = 2

Answer:

10 pounds

Explanation:

If the moon has 1/6 the gravity of earth, divide your weight on earth by 6 to find your weight on the moon

60 / 6 = 10 pounds

Answer:

temperatures.

Explanation:

Movement of heat flowing from one object to the other is a result from difference in temperature. Heat will flow from your warmer object to the cooler object until they both reach the same temperature.

The heat generated by the reactor core of a nuclear power plant used to provide power to buildings by generating steam, which turns a turbine, powering a generator and the correct option is option C.

Nuclear power plants are a type of power plant that use the process of nuclear fission in order to generate electricity.

The steam is used to spin large turbines that generate electricity. Nuclear power plants use heat produced during nuclear fission to heat water.

In nuclear fission, atoms are split apart to form smaller atoms, releasing energy. Fission takes place inside the reactor of a nuclear power plant.

Nuclear power plants are very similar to coal-fired power plants. However, they require different safety measures since the use of nuclear fuel has vastly different properties from coal or other fossil fuels.

Therefore,  The heat generated by the reactor core of a nuclear power plant used to provide power to buildings by generating steam, which turns a turbine, powering a generator and the correct option is option C.

Learn more about Nuclear Power Plants, here:

https://brainly.com/question/385512

#SPJ7

3.56 grams of water will react with 1 mole of nitrogen dioxide (NO2). Therefore, 3.56 grams of water will react with 0.051 moles of nitrogen dioxide (NO2).

When nitrogen dioxide (NO2) reacts with water, it forms nitric acid (HNO3). The reaction equation is:

2NO2 + H2O → HNO3 + NO

The reaction is exothermic, so it releases energy in the form of heat. This can lead to an increase in temperature and pressure if the reaction is carried out in an enclosed container.

The rate of the reaction is affected by several factors, including temperature, pressure and the concentration of the reactants. Increasing the temperature and pressure can speed up the reaction, but this can also lead to a decrease in the reaction's efficiency.

Learn more about Nitric acid:

https://brainly.com/question/22698468

#SPJ4

3-ethyl-2.4-dimethyl-octanoic acid

Answer:

Aluminium (Al): (3*2)+(5*2)=16

Sulphor (S): (3*1)=3

Oxygen (O): (4*3)+(3*1)=15