what is the concentration of mg2 ions when 3.50 g of mg(oh)2 are dissolved in 1.5 l of a 0.200 m solution of koh? the solubility product of mg(oh)2 is 1.2 x 10-11.

The result of the calculation is:

(a) 0.1858

(b) 0.000128

(c) 2.51

Significant figures are the digits in a measurement or calculation that provide meaningful information about the precision and accuracy of that measurement or calculation. In scientific notation, the first non-zero digit is the first significant figure and all other non-zero digits and zeros that are between significant figures are also considered significant.

The last significant figure in a number is often rounded to provide the desired level of precision. The rules for determining significant figures are used to ensure that the results of calculations are reported accurately and consistently.

Learn more on significant figures here: https://brainly.com/question/15027067

#SPJ1

If a stray cat entered using the pet entrance and soiled the rug, it is important to address the situation promptly and appropriately.

Remember, it is essential to handle stray animals with care and prioritize their welfare. If you encounter persistent issues with stray animals, you may want to contact local animal welfare organizations or authorities for guidance and assistance.

Learn more about the pet entrance  here:

brainly.com/question/31973370

#SPJ11

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

We know that the leaves are the parts of the plant that are involved in photosynthesis. Photosynthesis is the process by which green plants produce their own food in the presence of sunlight and chlorophyll. We know that the leave has an outer protective covering.

The tissue that plays this outer covering of a plant for is the  epidermis and its waxy cuticle. It prevents damage to the plant.

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

Learn more about leaves:https://brainly.com/question/12539285

#SPJ1

3,500 grams of O2 are required to react with 1000 grams of octane.

To answer this question, we need to use stoichiometry. First, we need to balance the equation:

C8H18(l) + 12.5 O2(g) → 8 CO2(g) + 9 H2O(l)

Now we can see that for every 12.5 moles of O2, we can produce 8 moles of CO2. We can use this ratio to find out how many moles of O2 are needed to react with 1 mole of octane:

12.5 mol O2 / 1 mol octane

To find out how many grams of O2 are needed to react with 1000 g of octane, we need to convert 1000 g of octane to moles:

1000 g octane x (1 mol octane / 114.23 g octane) = 8.75 mol octane

Now we can use the ratio above to find out how many moles of O2 are needed:

12.5 mol O2 / 1 mol octane x 8.75 mol octane = 109.4 mol O2

Finally, we can convert moles of O2 to grams:

109.4 mol O2 x (32.00 g O2 / 1 mol O2) = 3,500 g O2

Therefore, 3,500 grams of O2 are required to react with 1000 grams of octane.

To know more about  octane click on below link :

https://brainly.com/question/29824322#

#SPJ11

3,500 grams of O2 are required to react with 1000 g of octane.

To answer this question, we need to use stoichiometry to find the mole ratio of octane and oxygen and then use the molar mass of oxygen to calculate the mass of oxygen needed to react with 1000 g of octane.

The balanced chemical equation is:

C8H18(l) + 12.5 O2(g) → 8 CO2(g) + 9 H2O(l)

The mole ratio between octane and oxygen is 1:12.5, meaning that for every 1 mole of octane, we need 12.5 moles of oxygen to react completely.

To find the number of moles of octane in 1000 g, we need to divide the mass by the molar mass:

Number of moles octane = 1000 g / 114.23 g/mol = 8.75 mol

Using the mole ratio, we can calculate the number of moles of oxygen required:

Number of moles of o2 = 8.75 mol octane × 12.5 mol O2 / 1 mol octane = 109.38 mol O2

Finally, we can calculate the mass of oxygen needed using its molar mass:

Mass of oxygen = 109.38 mol O2 × 32.00 g/mol = 3,500 g

Therefore, 3,500 grams of O2 are required to react with 1000 g of octane.

To know more about stoichiometry refer here:

https://brainly.com/question/30215297

#SPJ11

Answer:

I think it is b 50%

Answer:

[A] Plant shoots are positively phototropic and negatively gravitropic. [B] Plant shoots are negatively phototropic and positively gravitropic. [C] Plant shoots are negatively hydrotropic and positively gravitropic. [D] Plant shoots do not display any major tropisms.

Answer:-Gravitropism. It is a type of tropism where plants show some growth in response to gravity. ...

Chemotropism. There are few chemical substances, which are actively responsible for bringing a curvature movement in plant organs. ...

Thigmotropism. ...

Hydrotropism. ...

Thermotropism.                                                                                                                     The below mentioned article will highlight the six types of tropic movements in plants.

The six types are: (1) Thigmotropism (Haptotropism) (2) Phototropism (3) Geotropism (4) Thermotropism (5) Chemotropism and (6) Hydrotropism.                A tropism is a growth movement whose direction is determined by the direction from which the stimulus strikes the plant. There are two forms: Positive = the plant, or a part of it, grows in the direction from which the stimulus originates. and Negative = growth away from the stimulus.                         tropism is a biological phenomenon, indicating growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus. In tropisms, this response is dependent on the direction of the stimulus (as opposed to nastic movements which are non-directional responses).

Digital gold.

Silicon is the material of choice in the chip industry. Unlike the metals normally used to conduct electrical currents, silicon is a 'semiconductor', meaning that its conductive properties can be increased by mixing it with other materials such as phosphorus or boron.

Answer:Unlike the metals normally used to conduct electrical currents, silicon is a 'semiconductor', meaning that its conductive properties can be increased by mixing it with other materials such as phosphorus or boron. This makes it possible to turn an electrical current on or off.

Explanation:

Answer:  No, the samples are not of equal masses.

Explanation:  Mass is volume X density

A:  (2ml)*(18.4g/ml) = 36.8 g

B:  (5ml(*(35.5g/ml) = 177.5 g

Answer:

d

Explanation:

Answer:

I'm not really sure. but I think is D

Answer: B, Molar concentration is proportional to the change in the number of moles in a reaction

Explanation: took the test on plato

There are two signs of alpha decay. The matrix 4/2He is used in all of the equations to represent the emission of an alpha particle, which is a helium nucleus made up of two protons and two neutrons.

The nucleus loses two protons during alpha decay. The nucleus either acquires or loses a proton during beta decay. There is no change in the proton count during gamma decay.

Alpha decay can be described by a nuclear equation. If the total numbers of protons and neutrons on both sides of the arrow are equal, the equation is balanced. Alpha decay is one of the four types of radioactive decay.

To know more about alpha decay visit:-

https://brainly.com/question/14081292

#SPJ1

Answer:yup!!

Explanation:

Answer:

1077.3 molecular in 1.05*1026 molecules

Answer:

For #3 I believe it's A

Explanation:

It can't be changed INTO a solid because it already is one.

Hope this helps!

Answer:

Solid

Liquid

Gas

Hope this helps :)

- jp524

Answer:

the nucleus.

Explanation:

Because there is all the protons and neutrons are in the nucleus.

Answer:

gas

Explanation:

gas cant be aditanified as a gas if this is not right i am so sorry.

Answer:

Explanation:

The momentum of an object can be found by using the formula

momentum = mass × velocity

From the question we have

momentum = 45 × 1544

We have the final answer as

Hope this helps you

Answer:

69,480 kg. m/s

have a nice day!

Answer: Equilibrium

Explanation:

The reactions which do not go on completion and in which the reactant forms product and the products goes back to the reactants simultaneously are known as equilibrium reactions.

For a chemical equilibrium reaction, equilibrium state is achieved when the rate of forward reaction becomes equals to rate of the backward reaction which means the products are being made as quickly as reactants

Equilibrium state is the state when reactants and products are present but the concentrations does not change with time.

Answer:

monke

Explanation:

because my mum told me we are all monke

Answer:

No of protons = 15

Explanation:

Given that,

Atomic number = 15

Mass number = 31

We need to find the no of protons in the atom.

We know that,

No of protons = Atomic no of the atom

No of protons = 15

Hence, there are 15 protons in the atoms.

Answer:

Weather:

- The wind is blowing from the south.

- There is a thunderstorm warning.

- The average high temperatures for July in Yellowknife is 32.5 degrees Celcius.

- The wind is blowing at 56 km / hr.

Climate:

- The average temperature for February in Australia is 19 degrees Celsius.

- The average rainfall for June in Kenya is 3.3cm.

- 10mm of rain fell today.

- It is usually cold in Ottawa in January. -There was a cold weather advisory on Jan 21 2020.

-Hurricanes are most likely to hit the Gulf of Mexico and the Carribean.

Explanation:

Hope it helps.

Answer:

complex

Explanation:

becaause it fits in the words equation I hoped i helped

Answer: Uhmmmm this is what i got...-

Explanation:

It is a matter of fact that the hydrophobic (water-hating) oily compounds of cannabinoids such as CBD, THC and others are not water soluble. The term "water soluble" refers to materials which dissolve in water in a homogenous manner by becoming molecules or ions (such as sugar, alcohol, and salt).

Based on the calculations performed in this experiment, the same mass of a solute with a significantly higher molar mass would have a larger effect on the boiling point elevation. As a result, the same mass of a solute with a higher molar mass will have a greater effect on the boiling point elevation.

Boiling point elevation is a thermodynamic phenomenon that occurs when the boiling point of a solvent (a substance that dissolves a solute to create a solution) is increased by adding another substance, the solute, to it. When a solute is added to a solvent, it lowers the freezing point and raises the boiling point of the solvent, which is known as the boiling point elevation.The formula for boiling point elevation is: ∆Tb = Kbm

Here, ∆Tb is the boiling point elevation, Kb is the molal boiling point elevation constant, and m is the molality of the solution. To understand this, let us take an example: Suppose a solution containing 1.0 mol of sodium chloride (NaCl) is dissolved in 1.0 kg of water. The molality of the solution is 1.0 mol / 1.0 kg = 1.0 m. In addition, the Kb for water is 0.51 °C/molal, which means that the boiling point elevation is 0.51 °C when the molality of the solution is 1.0 mol/kg.So, the boiling point of the solution will be raised by 0.51 °C, which can be calculated using the above formula.Calculation performed in this experiment:Boiling point elevation = ΔTb = Kb . mTherefore, based on the above formula, the boiling point elevation is directly proportional to the molality of the solution, which, in turn, is directly proportional to the number of moles of solute in the solution. Furthermore, the number of moles of solute is proportional to the mass of the solute (in grams) divided by its molar mass (in grams/mol).So, if a solute with a significantly higher molar mass is added to the solvent, it will have a larger effect on the boiling point elevation. As a result, the same mass of a solute with a higher molar mass will have a greater effect on the boiling point elevation.

To know more about boiling point elevation visit:

https://brainly.com/question/30641033

#SPJ11

The final temperature of the mixed water is \(T=\frac{2.333}{101.5}\).

The combined water's ultimate temperature is 45.6 0C.

the settings provided;

Initial water temperature, \(t_1\), was 26.1C; initial water temperature, \(t_2\), was 75.4C. The mass of the cold water was 100 g.

75 g is the hot water's mass.

Water has a specific heat capacity of 4.184 \(\frac{J}{gC}\).

The mixture's ultimate temperature is estimated as follows;

based on the idea of energy conservation;

Heat received by the cold water equals heat lost by the hot water.

mcΔθ₂ = mcΔθ₁

75 x 4.184 x (75.7 - T) = 100 x 4.184 x (T - 26.1)

75 x (75.4 - T) = 100 x (T - 26.1)

(75.4 - T) = 1.333(T - 26.1)

75.4 - T = 1.333T - 34.719

75.4 + 26.1 = 1.333T + T

101.5 = 2.333T

\(T=\frac{2.333}{101.5}\) which gives the final temperature.

Learn more about final temperature

brainly.com/question/11244611

#SPJ4

Answer:

The velocity of the bb when it reaches a height of 203 m can be determined using the laws of projectile motion. Since the bb is moving vertically upwards, its velocity at that height will be zero.

brainlest?

Answer: v = 83.96 m/s

Assuming the acceleration due to gravity is approximately 9.8 m/s^2, we can use the principles of projectile motion and energy conservation.

Using the equation for the vertical displacement of an object in free fall:

Δy = (v₀² - v²) / (2g)

Δy = vertical displacement (203m)

v₀ = initial velocity (105 m/s)

v = final velocity (not known yet)

g = accerlation due to gravity (9.8 m/s^2)

Lets rearrange the equation to solve for the final velocity:

v = v = √(v₀² - 2gΔy)

Substituting the given values:

v = √(105² - 2 * 9.8 * 203)

v ≈ √(11025 - 3979.6)

v ≈ √(7054.4)

v ≈ 83.96 m/s

Therefore, when the BB pellet is at the height of 203m, its velocity will be approximately 83.96 m/s.

In many acid-base reactions, a starting material with a net Positive charge is usually an acid while a starting material with a net Negative charge is often a base.

In many acid-base reactions, a starting material with a net positive charge is usually an acid, while a starting material with a net negative charge is often a base. Acids are substances that can donate protons (H+) and are therefore positively charged when they lose a proton. Bases, on the other hand, can accept protons (H+) and tend to have a net negative charge when they gain a proton. This is based on the concept of proton transfer in acid-base reactions, where the acid donates a proton (positive charge) to the base, resulting in the formation of a new acid and base. It's important to note that not all acids or bases have a net charge, as their acidity or basicity can also be determined by other factors such as electron pair donation or acceptance.

learn more about acid-base reactions here:

https://brainly.com/question/3911136

#SPJ11

A system undergoes a change from one state to another along two different pathways, one of which is reversible and the other of which is irreversible. The relative magnitudes of qrev and xirr is the magnitude of heat exchanged (qrev) is smaller than that exchanged in an irreversible process.

A reversible process is one that can be reversed by an infinitely small change in a variable such as pressure or temperature while an irreversible process is one that cannot be reversed to its original state by the same method. The terms qrev and qirr refer to the heat exchanged in reversible and irreversible processes, respectively.In a reversible process, the system's state remains very close to that of the equilibrium state, while the system undergoes the process.

The work done in a reversible process is maximum and the heat exchanged is minimal. Hence, the magnitude of heat exchanged (qrev) is smaller than that exchanged in an irreversible process. Therefore, we can say that qrev < qirr.  The explanation for the relative magnitudes of qrev and qirr in a system that has undergone a change from one state to another along two different pathways, one of which is reversible and the other is irreversible is that the magnitude of heat exchanged (qrev) is smaller than that exchanged in an irreversible process.

Learn more about reversible process at

https://brainly.com/question/32101532

#SPJ11

The structure for 5-chloro-2-propyl-1-heptanol can be drawn by drawing a 7 carbon chain with (OH) functional group on C1, adding propyl group on C2 and  Cl on C5                                  

5-Chloro-2-propyl-1-heptanol is an organic compound that belongs to the class of alcohols.

The IUPAC name of the compound is 5-chloro-2-propylheptan-1-ol, which denotes the position of the hydroxyl group on the carbon chain. The prefix "heptan-" refers to the seven-carbon chain, and the suffix "-ol" denotes the presence of an alcohol functional group (-OH).

5-Chloro-2-propyl-1-heptanol is a colorless to pale yellow liquid with a strong odor. It is a primary alcohol. It is a versatile chemical intermediate that can be used to prepare a variety of other compounds, including pharmaceuticals, agrochemicals, and flavors. It is also used as a solvent and a reagent in organic synthesis

Thus, the structure for 5-chloro-2-propyl-1-heptanol can be drawn by drawing a 7 carbon chain with (OH) functional group on C1, adding propyl group on C2 and  Cl on C5  

To learn more about IUPAC :

https://brainly.com/question/28872356

#SPJ11