Find the hydroxide concentration of a lioh soultion that has a poh of 4.80.

[oh] = (round to 2 decimal places)

Answer:

Groups like the Halogens, which include Chlorine and Flourine, share similar properties both behaviorally and structurally. The Periodic Table is essentially a bunch of patterns and trends and the groups (like the one with Sodium and Potassium) were grouped together because of these similarities.

Explanation:

https://en.wikipedia.org/wiki/Alkali_metal

Answer:

it will option A . hope it helps

Answer:

options A

Explanation:

the balloon filled up because of the formation of gas bubbles

The element with the following electron configuration [Kr] 4d105s25p2 belongs to transition element.

The given electron configuration belongs to an element with atomic number 52. It can be written as 1s22s22p63s23p63d104s24p64d105s25p2. It belongs to the transition element as the electrons are filled in d orbital. KNO3 dissolves in water is a physical change.A physical change refers to a change in the state or properties of matter without any modification in its composition. The given options that are physical change and rest is a chemical change.KNO3 dissolves in water is a physical change as the salt is still KNO3 and has not been modified into something else. It simply separated into smaller particles to mix uniformly with the solvent, which in this case is water.A firecracker explodes, when popcorn pops when placed in a microwave and a piece of wood is burned are all examples of chemical change.A nail rusts is also a chemical change.

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Answer:

It has less carbon dioxide than when it entered the gills, it has more oxygen than when it entered the gills

Explanation:

there is none i just found the answer =_=

Blood is different after it is pumped through gills as it has less carbon dioxide and more oxygen when it enters the gills through the process of diffusion.

Diffusion is defined as the process of movement of molecules which takes place under concentration gradient. It helps in movement of substances in and out from the cell.The molecules move from lower concentration region to a higher concentration region till the concentration becomes equal.

There are 2 main types of diffusion:

1) simple diffusion-process in which substances move through a semi-permeable membrane without the aid of transport proteins.

2) facilitated diffusion- It is a passive movement of molecules across cell membrane from higher concentration region to lower concentration.

There are 2 types of facilitated diffusion one is osmosis and dialysis.

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If the mother is Rh negative and her child is Rh positive she will form antibodies that may kill her second child

Found in the bone marrow

The Rh protein but not the A or the B proteins

Mothers must be aware of the rhesus factor in order to prevent a potentially serious condition called Rh incompatibility. The rhesus factor, also known as the Rh factor, is a protein that is found on the surface of red blood cells.

If a woman who is Rh-negative (does not have the Rh factor) becomes pregnant with a fetus who is Rh-positive (does have the Rh factor), there is a risk that the mother's immune system will recognize the Rh factor on the fetus's red blood cells as a foreign substance and produce antibodies against it.

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Answer:

3.15×18

56.7

................

Answer:

A, T, C y G, son las "letras" del código del ADN; representan los compuestos químicos adenina (A), timina (T), citosina (C) y guanina (G), respectivamente, que constituyen las bases de nucleótidos del ADN. ...El código genético es el conjunto de reglas que define cómo se traduce una secuencia de nucleótidos en el ARNm a una secuencia de aminoácidos en una proteína

Answer:

22:

Formular:

\(atomic \: mass = \frac{ \sum(isotopic \: mass \times \%abundance)}{100} \\ \)

substitute:

\(atomic \: mass = \frac{(23.985 \times 78.70) + (24.986 \times 10.13) + (25.983 \times 11.17)}{100} \\ \\ = \frac{(1887.620) + (253.108) + (290.230)}{100} \\ \\ = \frac{2430.958}{100} \\ \\ { \boxed{ \boxed{average \: atomic \: mass = 24.3 \: amu}}}\)

23:

Same element is represented by same number of protons.

Answer:

6 protons. 6 protons

7 neutrons. 8 neutrons

6 electrons. 6 electrons

Note: Atoms with same proton number but different mass number are called isotopes

Answer:

joules

Heat is the transfer of thermal energy from a system to its surroundings or from one object to another as a result of a difference in temperature. Heat is measured in joules (J).

Explanation: Mrk me brainliest please

Answer: Joules or calories

That's correct! The numbers you mentioned, such as 10-20-10, are commonly found on fertilizer labels and represent the proportions of nitrogen (N), phosphorus (P), and potassium (K) in the fertilizer, respectively. This system is known as the NPK ratio.

Nitrogen (N) is essential for plant growth and is responsible for promoting leaf and stem development. Phosphorus (P) plays a crucial role in root development, flowering, and fruiting. Potassium (K) aids in overall plant health, disease resistance, and the development of strong stems.

In the example you provided, a 10-20-10 fertilizer would contain 10% nitrogen, 20% phosphorus, and 10% potassium. The remaining percentage would typically consist of other nutrients and filler materials.

Sulfur is not typically included in the NPK ratio. Sulfur is an essential nutrient for plant growth, but its concentration in fertilizers is not commonly indicated in the NPK ratio. However, sulfur is often present in fertilizers in the form of sulfate ions, as you mentioned, which can contribute to the overall nutrient content.

Different plants have varying nutrient requirements, so the NPK ratio in fertilizers can be adjusted to meet specific needs. It's always a good idea to consider the specific requirements of your plants and soil conditions when choosing a fertilizer.

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Answer:

See below

Explanation:

A homogeneous solution has the same properties throughout the entire mixture.  Water is an example.  

Heterogeneous solutions do not.  Sand is a good example.  Each grain of sand is not identical to the next grain of sand.

The energy provided by the snack is obtained as 1254 J/g.

The calorimeter is used to measure the energy content of food. The food is burnt in the calorimeter in order to determine the amount of energy that it contains. The mass of the food burnt is converted to energy.

Mass of food burnt = 3.52 g - 1.52 g = 2 g

The energy that is provided by the snack in J/g = 2,508 J/ 2 g

= 1254 J/g

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Answer: m = 95.7 g

Explanation:

Use the equation q = m x Cs x delta T

Step 1: Identify what was provided in the problem.

q = 2000 J

m = ? (this is what we need to find)

Cs = 4.18 J/g °C

delta = 5°C

Step 2: Place known values into the equation.

q = m x Cs x delta T

2000 J = m x (4.18 J/g °C) x 5°C

Step 3: Isolate m by multiplying both sides of the equation by (4.18 J/g °C) x 5°C.

2000 J/(4.18 J/g °C) x 5°C = m

Step 4: Solve for m.

2000 J/(4.18 J/g °C) x 5°C = m

Note that J and °C units cancel and you are left with g only.

m = 95.7 g

Boyle's Law-

\(\:\:\:\:\:\:\:\:\:\:\:\star\:\sf \underline{ P_1 \: V_1=P_2 \: V_2}\\\)

(Pressure is inversely proportional to the volume)

Where-

As per question, we are given that -

Now that we have all the required values and we are asked to find out the final volume, so we can put the values and solve for the final volume -

\(\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\star\:\sf \underline{ P_1 \: V_1=P_2 \: V_2}\)

\(\:\:\:\: \:\:\:\:\:\:\longrightarrow \sf 6 \times 4= 2\times V_2\\\)

\( \:\:\:\:\:\:\:\:\:\:\longrightarrow \sf V_2 = \dfrac{6 \times 4 }{2}\\\)

\( \:\:\:\:\:\:\:\:\:\:\longrightarrow \sf V_2 = \cancel{\dfrac{ 24}{2}}\\\)

\( \:\:\:\:\:\:\:\:\:\:\longrightarrow \sf \underline{V_2 = 12 \:L }\\\)

Therefore, the new volume of the gas will become 12 L at 2atm.

Answer:

Option A

Explanation:

Leguminous plants like pulses etc. have root nodules comprising of rhizobacterium which live in a symbiotic relationship with the roots of the plant and in turn fix the nitrogen in the soil in the roots of the leguminous plants.

Hence, option A is correct

Answer: orbitals supernumerary

Explanation:

Answer:

both S orbital and p orbitals

Explanation:

took the exam got the question right.

Answer:

A and C

Explanation:

I just took the quiz

The factors affect the amount of thermal energy an object has:

Factors that affect the amount of energy are:

A measure of the kinetic energy of the particles that make up a material. The movement of heat energy from a warm object to a cool object. Transmission of thermal energy from one object to another by electric waves. Transmission of thermal energy between objects by particle collisions.

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Answer: If a dark section of pavement absorbs more of the sun's energy than it reflects, then that section will feel warmer over the course of a sunny day.

Answer:due to unequal heating

Explanation:

The most reactive dienophile in a Diels-Alder reaction with 1,3-butadiene is CH2=CHCHO (acrolein)

The Diels-Alder reaction is a chemical reaction that combines a conjugated diene and a dienophile to form a cyclic compound.

The reactivity of a dienophile is determined by its ability to accept electron density and undergo the necessary bond-forming process.

Among the given options, CH2=CHCHO (acrolein) is the most reactive dienophile in a Diels-Alder reaction with 1,3-butadiene. This is because acrolein contains an electron-withdrawing carbonyl group (C=O) attached to an alkene (CH2=CH).

The electron-withdrawing nature of the carbonyl group increases the electrophilic character of the alkene, making it more susceptible to nucleophilic attack by the electron-rich diene, 1,3-butadiene.

The other compounds in the options (CH3CH≡CHCH3, CH2=CHOCH3, CH2=CH2, and (CH3)2C=CH2) lack the electron-withdrawing carbonyl group, reducing their reactivity as dienophiles in a Diels-Alder reaction with 1,3-butadiene.

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Answer:

fomula; ( x = mutiplacation btw)

% m/m = m(solute) / m(solution) x 100%

0.50g x 70% = m/m x 100%

0.5g x 70% / 100% = 3.5 g KI

(both % cancle each other)

Explanation:

heads up might be wrong i did it myself

Equations 1 & 2, Equations 2&3, and Equations 1&3 illustrate a favorable energetic coupling in a cell.

What is the non-spontaneous reaction?
A nonspontaneous reaction is one that under the specified conditions, does not favour the formation of products. A reaction needs to be endothermic, accompanied by the a drop in entropy, or both to qualify as nonspontaneous. The majority of the gases that make up our atmosphere are a combination of nitrogen and oxygen.

If G is positive, the reaction is not spontaneous and will need external energy. The reaction seems to be spontaneous and will happen on its own if G is negative.

Coupling of reactions-
Equations 1 and 2-
∆G1=-7kcal/mol, ∆G2=-14.8kcal/mol
∆G total= -21.8kcal/mol( favourable reaction)
Equation 2&3-
∆G2=-14.8kcal/mol, ∆G3=+3.3kcal/mol
∆G total=-11.5kcal/mol(favourable)
Equations 3 and 4-
∆G3=+3.3kcal/mol, ∆G4= +7kcal/mol
∆G total=+10.3kcal/mol(unfavorable)
Equations 1 and 4-
∆G1=-7kcal/mol, ∆G4=+7kcal/mol
∆G total= 0(reaction will be in equilibrium)
Equations 1 and 3-
∆G total=(-7+3.3)kcal/mol
=-4.3 kcal/mol(favorable)

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Answer:

Hormones help regulate many bodily processes, such as appetite, sleep, and growth. Sex hormones are those that play an essential role in sexual development and reproduction. The main glands that produce sex hormones are the adrenal glands and the gonads, which include the ovaries in females and testes in males

Explanation:

In the image shown, lithium combines with fluorine to give lithium fluoride.

We know that a compound is formed when there is a combination of atoms to form a compound. There are several kinds of bonds that could be formed between the atoms in a compound. In this case, we have the ionic bond. The ionic bond is formed by the complete transfer of valence electrons from a metallic element to a nonmetallic element.

Now, we have two elements that are combining, the element by the left hand side is the metal and this metal is lithium. It combines with the non metal fluorine on the right hand side to yield Lithium fluoride.

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Answer:

A

Explanation:

Mitosis makes 2 daughter cells so you know the answer is not b

So,

There's an equation that we could use in order to find frequency, and it is the next one:

This equation tells us that the energy of the photon is equal to the product of the Plank constant (h), which is 6.626*10^-34 J.s, and the frequency.

In this problem, we know the value of E and the value of h, so we need to solve for v:

Therefore, the correct answer option is A.