Se disuelven 10 g de acido carbónico H2CO3 en 150 g de agua. Determina la concentración % m/m de esa disolución?

Answer:

Magnitude determines the size and how strong force is.

Answer:

75%

Explanation:

DId it on USATP

Answer:

1. Carbon

2. C

3.  Oceans

4. This is the hardest question so far :(

5. Most of every diamonds are colorless and clear, but are in a category of brown or pale yellow color that is called the normal color range.

6. has to be refraction.

Pls mark me brainly!

H₃PO₄ is the chemical formula for phosphoric acid, and it is composed of 3 moles of hydrogen (H), 1 mole of phosphorus (P), and 4 moles of oxygen (O).

1. Identify the chemical formula: H₃PO₄
2. Count the number of atoms for each element: 3 H atoms, 1 P atom, and 4 O atoms
3. Since you have 1 mole of H₃PO₄, the moles of each element will be the same as the number of atoms in the formula.

So, in exactly 1 mole of H₃PO₄, there are:
- 3 moles of hydrogen (H)
- 1 mole of phosphorus (P)
- 4 moles of oxygen (O)

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Answer:

Mass = 26.8 g

Explanation:

Given data:

Mass of sodium hydroxide are required = ?

Mass of water = 232 g

Molarity of solution = 2.88 M

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

1 g = 0.001 L

232 g = 0.001 L× 232 =0.232 L

By putting values in molarity formula,

2.88 M = number of moles / 0.232 L

Number of moles = 2.88 M ×0.232 L

Number of moles = 0.67 mol

Mass of NaOH:

Mass = number of moles × molar mass

Mass = 0.67 mol × 40 g/mol

Mass = 26.8 g

Answer: It loses kinetic energy.

Answer:

As light initially enters the water, it is refracted as in figure (b) and then reflected off the mirror (at the bottom of the glass). Upon exiting the water, the light is bent away from the normal as it passes from water (more dense) and into air (less dense).

The important properties of RNA polymerase from E. coli are It reads the DNA template from its 3' end to its 5' end during RNA synthesis and It uses a single strand of dsDNA to direct RNA synthesis. It is composed of five different subunits. SO, Option D, A and B are correct.

It is a multisubunit enzyme that contains many functional regions that are critical for the synthesis of RNA from a DNA template.The RNA polymerase of E. coli is a complex enzyme that has a number of important properties. The RNA polymerase is composed of five different subunits that are arranged in a holoenzyme configuration.

This holoenzyme is responsible for the recognition of promoter sequences on the DNA template and the subsequent initiation of RNA synthesis. RNA polymerase from E. coli reads the DNA template from its 3' end to its 5' end during RNA synthesis. This is in contrast to DNA polymerase, which reads the DNA template from its 5' end to its 3' end during DNA replication.

RNA polymerase from E. coli uses a single strand of dsDNA to direct RNA synthesis. The enzyme recognizes the template strand and reads it in the 3' to 5' direction, synthesizing the RNA strand in the 5' to 3' direction. This process is called transcription.

Therefore, Option A,B, and D are correct.

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C, O, and F have less exothermic electron affinity than Si, S, and Cl respectively is due to their atomic structure and the stability of their outermost electron shells.

Carbon (C), Oxygen (O), and Fluorine (F) are all located in the second period of the periodic table, which means they have two electron shells. Silicon (Si), Sulfur (S), and Chlorine (Cl) are all located in the third period, which means they have three electron shells. The electron affinity of an atom is the amount of energy released when an electron is added to a neutral atom to form a negative ion. Atoms with a higher electron affinity release more energy when an electron is added, making the process more exothermic.

In the case of C, O, and F, their outermost electron shells are already relatively stable with 4, 6, and 7 electrons respectively. Adding an additional electron would disrupt this stability and require more energy. In contrast, Si, S, and Cl have a less stable outermost electron shell with only 4, 6, and 7 electrons respectively in their third shell. Adding an additional electron to these atoms would increase their stability and release more energy, resulting in a more exothermic electron affinity. Therefore, C, O, and F have less exothermic electron affinity than Si, S, and Cl respectively due to the stability of their outermost electron shells.

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Answer:

"it can help us explain the universe" or "it can help us study how cells in the body function"

Explanation:

you choose which one you want but their still both technicly right

\(\text{Molarity,}~ S= 2.1~mol/L\\\\\text{Molar mas of}~ NaHCO_3, ~M=84~~ g/mol\\\\\text{Volume,}~~ V = 1 ~L\\\\\text{Mass,} ~w = ?\)

\(\text{ We know that,}\\\\~~~~~S = \dfrac{n}V\\\\\implies n = SV\\\\\implies \dfrac{w}{M} = SV\\\\\implies w = SVM\\\\\implies w= 2.1 \times 1 \times 84\\\\\implies w =176.4 ~ g\)

Answer:  1.8x10^-4 M H+

Explanation:  The number of moles of NaOH added to the 100 ml soultion will be equal to the number of moles of H+ present in that solution.  

Moles NaOH in 7.2 ml of 2.5x10^-3 M NaOH

(2.5x10^-3 M NaOH) is the same as 2.5x10^-3 moles NaOH/liter

(2.5x10^-3 moles NaOH/liter)*(7.2 ml)*(1 liter/1000ml) = 1.8x10^-4 moles NaOH used to titrate 100 ml of the acid.  That means there was 1.8x10^-4 moles of H^+ in 100 ml.  

Concentration of H^+ = (1.8x10^-4 moles H)/0.100 l) = 1.8x10^-4 M H+

(pH of 3.74)

Answer:

water

Explanation:

the scientific answer would be hydro but it also means water

Answer:

\(\boxed {\boxed {\sf P_2= 9 \ atm}}\)

Explanation:

Since the temperature is held constant, we only need to focus on the volume and pressure. We will use Boyle's Law, which states the volume of a gas is inversely proportional to the pressure. The formula is:

\(P_1V_1=P_2V_2\)

Originally, the gas had a volume of 150 milliliters and a pressure of 3.0 atmospheres. We can substitute these values into the left side of the equation.

\(3.0 \ atm * 150 \ mL = P_2V_2\)

The original gas was compressed to a volume of 50 milliliters, but we don't know the volume.

\(3.0 \ atm *150 \ mL= P_2 * 50 \ mL\)

Now, we need to solve for the new pressure (P₂). Multiply on the left side first.

\(450 \ atm*mL= P_2 * 50 \ mL\)

Since we are solving for the pressure, we need to isolate the variable. It is being multiplied by 50 mL. The inverse of multiplication is division. Divide both sides by 50 mL.

\(\frac{450 \ atm*mL}{50 \ mL}= \frac{P_2 * 50 \ mL}{50 \ mL}\)

\(\frac{450 \ atm*mL}{50 \ mL}= P_2\)

The units of milliliters will cancel.

\(\frac{450 \ atm}{50 }= P_2\)

\(9 \ atm =P_2\)

The new pressure is 9 atmospheres.

In the completed and balanced equation, the coefficient of O₂ is 2.

To balance the redox reaction: NO₃⁻ + H₂O₂ → NO + O₂, we'll follow the steps for balancing redox reactions:

1. Assign oxidation numbers to each element:

  NO₃⁻: N has an oxidation number of +5, and O has an oxidation number of -2.

  H₂O₂: H has an oxidation number of +1, and O has an oxidation number of -1.

  NO: N has an oxidation number of +2, and O has an oxidation number of -2.

  O₂: O has an oxidation number of 0.

2. Identify the elements undergoing oxidation and reduction:

  In this case, nitrogen (N) is undergoing reduction, and oxygen (O) is undergoing oxidation.

3. Write the two separate half-reactions, one for oxidation and one for reduction:

  Reduction half-reaction: NO₃⁻ → NO

  Oxidation half-reaction: H₂O₂ → O₂

4. Balance the atoms other than oxygen and hydrogen in each half-reaction:

  Reduction half-reaction: 2NO₃⁻ → 2NO

  Oxidation half-reaction: 2H₂O₂ → O₂

5. Balance the oxygen atoms by adding water molecules (H₂O) to the side that needs more oxygen:

  Reduction half-reaction: 2NO₃⁻ → 2NO + 3H₂O

  Oxidation half-reaction: 2H₂O₂ → O₂ + 2H₂O

6. Balance the hydrogen atoms by adding H⁺ ions to the side that needs more hydrogen:

  Reduction half-reaction: 2NO₃⁻ + 10H⁺ → 2NO + 3H₂O

  Oxidation half-reaction: 2H₂O₂ → O₂ + 2H₂O

7. Balance the charges by adding electrons (e⁻) to the side that needs more negative charge:

  Reduction half-reaction: 2NO₃⁻ + 10H⁺ + 8e⁻ → 2NO + 3H₂O

  Oxidation half-reaction: 2H₂O₂ → O₂ + 4H⁺ + 4e⁻

8. Multiply the half-reactions by appropriate coefficients to equalize the number of electrons transferred:

  Reduction half-reaction: 2NO₃⁻ + 10H⁺ + 8e⁻ → 2NO + 3H₂O

  Oxidation half-reaction: 4H₂O₂ → 2O₂ + 8H⁺ + 8e⁻

9. Add the two half-reactions together and cancel out the electrons:

  2NO₃⁻ + 10H⁺ + 8H₂O₂ → 2NO + 3H₂O + 2O₂ + 8H⁺ + 8e⁻

10. Simplify the equation by removing the spectator ions and simplifying the coefficients:

  2NO₃⁻ + 8H₂O₂ → 2NO + 3H₂O + 2O₂

In the completed and balanced equation, the coefficient of O₂ is 2.

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To solve this problem, we can use the formula for radioactive decay and after 4 half-lives, there will be 6,250 atoms of uranium remaining for Parents and  93,750 atoms of lead produced for daughters.

The formula is \(N = N0 * (1/2)^{(t/t1/2)} ^\)

where N is the final amount, N0 is the initial amount, t is the time elapsed, and t1/2 is the half-life of the radioactive isotope.

Given that the half-life of the uranium-lead (U-Pb) system is 1.6 billion years, the time required for 4 half-lives to occur is:

t = 4 * t1/2 = 4 * 1.6 billion years = 6.4 billion years

Therefore, it would take 6.4 billion years to get through these 4 half-lives.

Using the formula for radioactive decay, we can calculate the amount of uranium and lead remaining after 4 half-lives have occurred, starting with 100,000 atoms of uranium:

For the parents (uranium):

\(N = N0 * (1/2)^{(t/t1/2)} ^ = 100,000 * (1/2)^4 = 6,250\)atoms

Therefore, after 4 half-lives, there will be 6,250 atoms of uranium remaining.

For the daughters (lead):

\(N = N0 - (N0 * (1/2)^{(t/t1/2)} = 100,000 - 6,250 = 93,750\) atoms

Therefore, after 4 half-lives, there will be 93,750 atoms of lead produced.

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Answer:

The claim is: Therefore Mitosis requires less energy than sexual reproduction does.

Explanation:

Answer:

Water is a remarkable substance, and its unique properties are largely due to the presence of polar covalent bonds and hydrogen bonds in its structure. These characteristics play a crucial role in the physical and chemical properties of water, making it essential for life as we know it.

Explanation:

The polar covalent bonds in water arise from the unequal sharing of electrons between oxygen and hydrogen atoms. This results in the oxygen atom having a partial negative charge (δ-) and the hydrogen atoms having partial positive charges (δ+). These charges create polarity within the water molecule, leading to the formation of hydrogen bonds.

Hydrogen bonds occur when the partially positive hydrogen atom of one water molecule is attracted to the partially negative oxygen atom of another water molecule. These hydrogen bonds are relatively weak individually, but when present in large numbers, they contribute to the cohesion, surface tension, and high boiling point of water.

The importance of these bonds is manifold. The cohesion between water molecules due to hydrogen bonding enables water to form droplets, have a high surface tension, and flow freely, facilitating transport within organisms and in the environment. Additionally, hydrogen bonding leads to the high specific heat capacity and heat of vaporization of water, making it an effective regulator of temperature in living organisms and ensuring stable environmental conditions.

Furthermore, hydrogen bonds play a crucial role in the unique properties of water as a solvent. The polar nature of water allows it to dissolve a wide range of substances, including ionic compounds and polar molecules, facilitating various biological processes such as nutrient transport and chemical reactions in cells.

Answer:Intermolecular forces

Explanation:See in a molecule these intermolecular forces hold the atoms together which decides the rigidity of the material.

I hope the answer was helpful

Answer:

The planets follow these orbit  paths as they travel around the Sun. The Sun’s gravity  

makes the planets move in this way. It pulls on the planets, keeping them in motion in their orbit.

Modeling is a way to see ideas or have a  particular idea or

concept.

 Models do have some lines .

 Often a model is made with certain things.

 A model of the solar system may contain all of the planets and the Sun, but it may not include the planets’

individual moons or every planit  and rock in the solar system.

Explanation: if you think about it and and look at pics it is easy

hope this helps

Answer:

Covalent bonds are the strongest bonds in nature and under normal biological conditions have to be broken with the help of enzymes. This is due to the even sharing of electrons between the bonded atoms and as with anything equally shared there is no conflict to weaken the arrangement.

Explanation:

Bonding electrons are described as electrons that participate in chemical bonds. Chemical bond, a strong attraction between atoms, ions, or molecules, might be the subject here. Atoms sharing electron pairs form a covalent or molecular connection. An attraction between the atomic orbitals of atoms in a molecule is called a bonding molecular orbital.

Which bonding type results in stronger bonds? What is your evidence?

A covalent bond is created when the difference between two atoms' electronegativities is too small for an electron transfer to occur and produce ions. Bonding electrons are collectively referred to as the electrons that are present between the two nuclei. The "glue" that binds the atoms into molecular structures is the bound pair.

It is the most powerful link. By sharing an electron, the two atoms in such a bond are joined together.

One Hydrogen atom with one valence electron and one Chlorine atom with seven valence electrons, for instance, make up the HCL molecule. In this instance, hydrogen and chlorine share an electron to create a single bond.

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The possible values of the quantum numbers are:

Orbital shape quantum number l: 0, 1, 2, 3, 4, or 5.

Magnetic quantum number m: -l to +l.

Spin quantum number, s: +1/2 or -1/2.

For the principal quantum number n = 6, the possible values of the azimuthal (orbital shape) quantum number l are 0, 1, 2, 3, 4, and 5.

The magnetic quantum number m can have values ranging from -l to +l, inclusive.

The spin quantum number, s can be either +1/2 or -1/2.

So, the valence electrons in an atom with principal quantum number n = 6 can have the following quantum numbers:

Azimuthal quantum number, l can be 0, 1, 2, 3, 4, or 5.

Magnetic quantum number, m can range from -l to +l, inclusive.

Spin quantum number, s can be either +1/2 or -1/2.

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The outer shell of the given element was determined as illustrated must be a noble gas. Therefore, option D is correct.

Noble gases can be described as the 6 elements that are organized in group 18 of the modern periodic table. The noble gases are Helium, Neon, Argon, Krypton, Xenon, and Radon.

Under standard temperature and pressure, noble gases exist in the gaseous form and possess low reactivity. Therefore, noble gases are also referred to as inert gas.  All the noble gases exhibit stable electronic configurations in their valence shell that are completely filled. Noble gases generally exist as monoatomic.

The general outer configuration of the noble gases can be written as ns²np⁶,  n is the principal quantum number. Therefore, the given electron dot diagram has eight electrons in its valence shell so it is representing a noble gas.

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Answer:

Endothermic is identified if the process requires heat as a reactant, since endothermic means "intake of heat", so it has to take in some type of heat.

Answer:

"A"

Explanation:

The magnetic dipole axis of the earth is tilted about 11½° from the rotation axis. This means the magnetic north pole and the geographic north pole are not in the same place. ...

They are also not the sam ehtings :

Magnetic axis is the straight line joining the two poles of a magnet (as the magnetic poles of the earth)

Rotational axis i think is the straight line that joines the north and the south pole of the  .earth .... NOTE: The earth is a bit tilted....

look at the daigram for reference.

The rotational axis of the Earth and its magnetic axis are separated by 11.5 degrees and are not one and the same.

The rotational axis is an imaginary line or axis through which any object rotates and revolves.

The angular momentum vector of the object is divided by the angular momentum magnitude to find the rotational axis of an object.

The rotational axis of the earth is 23.5 degrees.

Thus, the correct option is A.

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The equilibrium constant of a reaction requires certain environmental variables to remain constant. These variables are pressure, temperature, and concentration. The correct option is A.

An equilibrium constant is a mathematical tool that enables the quantification of the extent of a chemical reaction. The equilibrium constant is symbolized by Keq, and it is utilized to determine the concentration of reactants and products present at equilibrium.

                           This calculation is done using the law of mass action.Keq is defined as the ratio of product concentrations to reactant concentrations in a chemical reaction taking place at equilibrium. The concentrations used in the expression for Keq are equilibrium concentrations.

                                 As a result, Keq is a constant for a given reaction at a specific temperature. Keq is dependent on a variety of environmental variables such as temperature, pressure, and concentration. To keep the equilibrium constant stable, these variables must remain constant.

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Answer:

A) The solubility of NH3 increases, and the

solubility of KCl increases.

Explanation:

The solubility of ammonia and potassium chloride increases with decrease in temperature from 40°C to 20°C.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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Answer:

\({ \sf{C _{2} H_{6} O}}\)