which salt dissolves in water to form an acidic solution ammonium nitrate sodium ethanoate potassium chloride sodium hydrogen carbonate

Answer:

They are called homogenous mixtures. If you put sand into a glass of water, it is considered to be a mixture. You can always tell a mixture, because each of the substances can be separated from the group in different physical ways. You can always get the sand out of the water by filtering the water away.

Answer:

Sifter

Explanation: They are called homogenous mixtures. If you put sand into a glass of water, it is considered to be a mixture. You can always tell a mixture, because each of the substances can be separated from the group in different physical ways. You can always get the sand out of the water by filtering the water away.

Answer:

This is because earth is at a tilt, and the tilt is the cause of all seasons. In winter, we are the furthest from the sun due to the tilt.

Explanation:

To find the moles present in 83.20 grams of manganese we must use the molar mass of manganese. This mass is equal to 54.94g/mol. So the moles of manganese (Mn) will be:

Answer: 83.20 grams of manganese are equivalent to 1.51 moles

Answer:

the reason is because of friction

Using  hypothetical scenario, the Separation of  the Pennie’s are given below

Pennies dated after 1982 are lighter and thinner because zinc is less dense than copper. However, they have a similar diameter of 19.05mm to pennies dated before 1982. The difference in composition between the two groups is important because copper is a valuable metal, and the cost of producing a penny exceeded its value. By reducing the amount of copper in pennies, the U.S. Mint was able to save money on production costs.

Pennies dated before 1982 are made of 95% copper and 5% zinc and weigh 3.11 grams. They have a diameter of 19.05mm and a thickness of 1.55mm. Pennies dated after 1982 are made of 97.5% zinc and 2.5% copper and weigh 2.5 grams. They have a diameter of 19.05mm and a thickness of 1.52mm.

Therefore, the main difference between the two groups is their composition, weight, and thickness. The pennies dated before 1982 are larger, heavier, and thicker than those dated after 1982.

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Answer:

the correct answer is 0.37m

Explanation:

37/100 = 0.37m

Answer:

How many meters are in 37 cm?

In 37 cm - 0.37 m

>3

Answer:

The composition of air this is because it vmade up of oxygen, nitrogen, Nobel gages and Carbon dioxide

The solubility of oxygen at 10m depth below sea level, 25 degrees Celsius, and 30 g/L salinity is approximately 6.59 mg/L.

To calculate the solubility of oxygen at a specific depth below sea level, temperature, and salinity, we can refer to the oxygen solubility tables. The solubility of oxygen can vary depending on these factors.

1. Begin by identifying the given parameters:
  - Depth: 10m below sea level
  - Temperature: 25 degrees Celsius
  - Salinity: 30 g/L

2. Use the given parameters to locate the corresponding values in the oxygen solubility table.

3. The solubility of oxygen at a depth of 10m below sea level, 25 degrees Celsius, and 30 g/L salinity is typically around 6.59 mg/L.

Therefore, the solubility of oxygen at 10m depth below sea level, 25 degrees Celsius, and 30 g/L salinity is approximately 6.59 mg/L.

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The oxygen solubility at 10m depth below sea level, 25°C, and 30 g/L salinity is approximately 1538 mol/L.

To calculate the oxygen solubility at a specific depth below sea level, temperature, and salinity, we can use the solubility formula.

The solubility of a gas decreases with increasing temperature and salinity, and increases with increasing pressure.

Here's how you can calculate the oxygen solubility at 10m depth below sea level, 25°C, and 30 g/L salinity:

1. Determine the pressure at 10m depth below sea level: -

The pressure at sea level is approximately 1 atmosphere (atm).

The pressure increases by approximately 1 atm for every 10 meters of depth.

Therefore, at 10m depth, the pressure is approximately 2 atm.

2. Convert the temperature to Kelvin: -

To convert from Celsius to Kelvin, add 273 to the temperature.

25°C + 273 = 298 K.

3. Use the solubility formula:

The solubility of oxygen in water can be calculated using Henry's law:

S = k * P * C.

S is the solubility of oxygen in moles per liter (mol/L).

k is the Henry's law constant for oxygen in water at a specific temperature and salinity.  

P is the partial pressure of oxygen in atmospheres (atm).

C is the concentration of oxygen in moles per liter (mol/L).

4. Look up the Henry's law constant for oxygen at 25°C and 30 g/L salinity:

The Henry's law constant for oxygen at 25°C and 30 g/L salinity is approximately 769 L*atm/mol.

5. Calculate the solubility:  

S = (769 L*atm/mol) * (2 atm) * (1 mol/L). - S ≈ 1538 mol/L.

Therefore, the oxygen solubility at 10m depth below sea level, 25°C, and 30 g/L salinity is approximately 1538 mol/L.

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Answer:

H2SO4 + Mg(OH)2 → H2O + MgSO4

Explanation:

when magnesium hydroxide reacts with sulfuric acid you get magnesium sulfate

hope this helps

Answer: Volcanic Eruptions

Explanation:

The third law of thermodynamics describes the entropy of a: solid.

The third law of thermodynamics states that the entropy of a pure crystalline substance approaches zero as the temperature approaches absolute zero (0 Kelvin or -273.15 degrees Celsius). This law implies that at absolute zero, a perfectly ordered and pure crystalline solid will have zero entropy.

The third law of thermodynamics is not specific to liquids or gases but applies to solids. In a solid, the molecules are highly ordered and have fixed positions in a regular lattice structure. As the temperature decreases towards absolute zero, the thermal motion of the molecules reduces, and the system becomes more ordered, resulting in a decrease in entropy.

In contrast, liquids and gases have higher entropy compared to solids at absolute zero because their molecules have more freedom of movement and are not as tightly arranged. Therefore, the third law of thermodynamics specifically addresses the entropy of solids and does not apply to liquids or gases.

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Answer:

Vitamin overdose occurs when a person ingests far more than the daily recommendation, for an extended period of time. Although the body can excrete excessive amounts of water-soluble vitamins such as vitamin C, it can retain fat-soluble vitamins such as vitamin A, which can be toxic.

Fe2O3 must be added to the equation in front of Fe to make it balanced. 4 Fe + 3 O₂ → 2 Fe₂O₃

In order to make a chemical equation equal in both reactants and products, add coefficients where necessary in front of the symbols or formulations.

Multiply coefficients (the numbers in front of the formulas) by the formulas themselves to equalize the amount of atoms of each element on both sides of the equation. The atoms that are easiest to balance are those of oxygen and hydrogen. After designating the states of matter for the reactants and products, review your work.

4 Fe + 3 O₂ → 2 Fe₂O₃

On the left side, there are 4 Fe atoms and 6 O atoms.

On the right side, there are 4 Fe atoms and 6 O atoms.

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The Tricyglycerol yields more energy on oxidation is the one containing three residues of stearic acid because it get fully reduced.

when atom or ion loses the electron in the process called as oxidation or the loss of hydrogen is called as oxidation. when the atom or ion gain electron  in the process called as reduction or gain of hydrogen is called as reduction

when the oxidation takes place  the oxidation state of atom increases and when reduction takes place the oxidation state of species decreases.

when molecule is oxidized, it loses energy and when molecule is reduced , it gains energy

Thus ,we can say that,The triacyglycerol cotaining the three stearic acid residues yield more energy because it is fully reduced.

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If you then increase the intensity of the 4.5 eV light, you will notice that the photons would come off at higher speeds.

Light intensity refers to the strength or amount of light produced by a specific lamp source.

Intensity of light measures of the wavelength-weighted power emitted by a light source.

Mathematically, the intensity of light source is given as;

I = P/A

where;

Increasing the light intensity (photon energy per second per unit area) increases the rate at which electrons leave the metal, and the electrons have more kinetic energy.

Thus,  if you then increase the intensity of the 4.5 eV light, you will notice that the photons would come off at higher speeds.

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Answer:

Explanation: Brief description of demonstration

Three clear liquids form three distinct layers in a cylinder. Iodine crystals sprinkled on the top layer sink and form pink solutions with the top and bottom layers but do not dissolve in the middle. When the liquids are mixed, two layers form: a pink layer on the bottom, and a colorless layer on top. When white potassium iodide crystals are added and the liquids are mixed again, the colorless layer turns yellow.

Concepts illustrated:

• Phases and phase boundaries (surfaces)

• Density

• Polar/non-polar (hydrophilic/hydrophobic) interactions

• Solubility, miscibility

• Chemical reaction

• Extraction

• [Solution and emulsion]

Materials

• Clear glass reaction cylinder or gas-washing bottle, at least 200 mm tall, with ground glass stopper (A cylindrical container is preferable to a separatory funnel for this experiment. The stopper must be non- reactive, and, to prevent a potentially dangerous pressure build-up, the stopper must be easily released. For a very small class, a large test tube with a suitable stopper is adequate. )

• Equal volumes of chloroform, water, and hexane (The volume of each liquid should be a little more than one-fourth the volume of the cylinder.)

• Iodine crystals and small spatula

• Potassium iodide crystals and medium spatula

Preparation

Work in a hood. Pour the chloroform into the reaction cylinder. Add the water and allow the liquids to separate completely. (If necessary, speed the process by holding the cylinder vertical and gently swirling the solution with a circular motion.) Tip the cylinder and pour the hexane slowly down the side to prevent mixing. Close the cylinder and set it aside, away from sources of heat, until time for the demonstration.

Answer:It forms single phase mixtures (solutions) with other polar and ionic substances. ... Since water is less dense than this non-polar mixture, the bubbles rise to the top. Potassium iodide, an ionic compound, dissolves easily in water but does not dissolve in chloroform and hexane.

Explanation:

Answer:

Circle Any 3 Red Spheres

Explanation:

All of these atoms are Carbon (C), as diamond is a network solid composed entirely of Carbon.  They are all the same.

The substance that has vibrating particles in regular, fixed positions is Ca(s). Solids are distinguished by the regular, fixed positions of their particles.

The solid particles are tightly packed together, with little empty space between them. The distance between the atoms is less than in liquids or gases, and the attractive forces between the particles are stronger. These forces keep the particles in their place, causing the particles to vibrate around a fixed position.When it comes to their shape, solids are characterized by having a fixed shape that does not conform to the container's shape in which they are placed. Solid matter's density is typically higher than that of liquids and gases.

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According to Coulomb's Law two ions in an ionic chemical bond that forms large electrostatic potential then the two will attract each other

Coulomb law states that bond energy is inversely related to the bond length and so factor which influence bond strength influence its length this can allow us to determine some trends in bind length and ionic compound  are held together by coulombic attraction and there is a negatively charged ion next to a positively charged ion and two will attract each other and when positively charged ion form a bond with negatively charged ion one atom donate electron to the other and this is known as ionic bind and the chemical molecule sodium chloride is an example

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Answer:  B) sand and water

Explanation:

because when you  mix sand and water the sand does not dissolve in the water

The volume of water added to dissolve potassium hydrogen phthalate (KHP) does not matter because the mass of KHP used is known and it will dissolve completely in any volume of water.

In volumetric analysis, the primary objective is to find the exact concentration of an analyte in a given solution. Analyte refers to the substance whose concentration is to be determined.In order to measure the analyte concentration, the known volume of the titrant of known concentration is added to the analyte until the endpoint is reached.Endpoint refers to the point in a titration where the reaction between the analyte and titrant is complete. The endpoint can be detected by observing a physical change in the system.In the case of KHP, it dissolves completely in any volume of water.

Therefore, the mass of KHP used can be accurately measured and dissolved in any volume of water. As a result, the volume of water added to dissolve the KHP does not affect the accuracy of the experiment.In summary, the volume of water added to dissolve KHP does not matter because the mass of KHP used is known and it will dissolve completely in any volume of water.

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The two constitutional isomers formed from the reaction between sodium nitrite (NaNO3) and 2-iodooctane (C8H17I) with a combined yield of 88% can be identified as 2-nitrooctane and 6-nitrooctane.

When sodium nitrite (NaNO3) reacts with 2-iodooctane (C8H17I), a substitution reaction takes place where the iodine atom is replaced by the nitro group (NO2). Since the molecular formula of the resulting isomers is given as C8H17NO2, it indicates that the reaction involves the replacement of the iodine atom (I) by the nitro group (NO2) while maintaining the same carbon and hydrogen framework.

In the case of 2-nitrooctane, the nitro group substitutes the iodine atom at the second carbon position of the octane chain. This results in a constitutional isomer where the nitro group is attached to a secondary carbon atom.

On the other hand, in 6-nitrooctane, the nitro group replaces the iodine atom at the sixth carbon position of the octane chain. This leads to a constitutional isomer where the nitro group is attached to a tertiary carbon atom.

The combined yield of the two isomers is stated as 88%, which means that the remaining 12% of the yield may comprise other by-products or unreacted starting materials.

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Answer:

a

Explanation:

Answer:A

Explanation: The universe is always expanding at all times. It dosnt expand that much though, very little

1) To calculate the molarity of NaClO₃ the first thing you need to do is transform 57 g of it in mole. For this, you use the following equation:

mole = mass / molar mass

molar mass of NaClO₃ = 23 + 35.5 + (3×16) = 106.5 g/mol

mole = 57/106.5

mole = 0.535 moles

2) Now you transform 300 mL of water into liters. You just need to divide it to 1000. So you have 0.3 liters of it.

3) Now you use the following equation to calculate the molarity:

M = n/V

M = Molarity

n = moles

V = volume of the solution

M = 0.535/0.3

M = 1.78 moles/Liter

Answer: 1.78 moles/Liter

Answer:

6.2 to 7.0

Explanation:

The “ideal” soil pH is close to neutral, and neutral soils are considered to fall within a range from a slightly acidic pH of 6.2-6.5 to slightly alkaline pH of 7.0-7.5. It has been determined that most plant nutrients are optimally available to plants within this 6.5 to 7.5 pH range, plus this range of pH is generally very compatible to plant root growth.

:-befrank