Which mixture contains all of the elements in a typical fertiliser?
A) ammonium nitrate and calcium phosphate B)ammonium phosphate and potassium chloride C)potassium nitrate and ammonium chloride D)potassium carbonate and ammonium nitrate​

Answer:

The faster the object falls the greater the air resistance. Terminal velocity is reached when the force due to air resistance (upward) equals the force due to gravity (downward). At terminal velocity there is no net force and therefore no further acceleration.

Answer:

180g

Explanation:

El soluto y el solvente son los componentes químicos que se mezclan en una solución. El soluto es una sustancia química, la cual puede poseer diferentes estados de agregación (es decir, sólido, líquido o gaseoso), que se se disuelve en un solvente; mientras que el solvente es una sustancia en estado líquído en la cual se diluye el soluto, formando una solución. La solubilidad de una sustancia química se define como la proporción en que una cantidad determinada soluto puede disolverse en una determinada cantidad de un solvente, a una temperatura específica. En este caso, 240 gramos (g) corresponde al 100% del contenido total de la solución, con lo cual la cantidad de solvente (agua) de una solución al 25% correspondería a la siguiente fórmula:

X = (75 x 240g) / 100

X = 180g

Answer:

160m/s

Explanation:

To find V Use the following formula V= F*W

V= Velocity F= Frequency W= Wavelength

V=20*8

=160m/s

Answer:

the number of protons is 35 and the number of neutrons is 46.

Explanation:

3.4 mole of H₂SO₄ moles of sulfuric acid (H₂SO4) are needed to react completely with 6.8 moles of lithium hydroxide.

How many moles of sulfuric acid (H₂SO4) are needed ?

Based on the reaction’s stoichiometry: 2 LiOH + H2SO4 Li2SO4 + 2 H2O

It is obvious that when 2.0 moles of LiOH react with 1.0 mole of H2SO4, 1.0 mole of Li2SO4 and 2.0 moles of H2O are produced.

Making use of cross multiplication:

1.0 mole of H2SO4 totally interacts with LiOH (2.0 moles)

2.0 mole of H2SO4 is required to totally react with 6.8 mole of LiOH.

The mole of H2SO4 = (1.0 x 6.8) / (2.0) = 3.4 mole of H2SO4.

One mole of H2SO4 has an atomic mass of 98 grams. So 98 grams of H2SO4 comprises one mole of H2SO4 molecule, or seven moles of atoms.

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A wave with a smaller wavelength has UV radiation energy than one with a larger wavelength.

Uses of UV Rays

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Answer: The specimens appears larger with a higher magnifications because a smaller area of the object is spread out to cover the filed view of your eye.

Explanation:

A solution is defined as a mixture of two or more substances, usually, a solute and a solvent, and the difference between these two are in quantity, solute represents the smallest amount and solvent will represent the highest amount, and while you can have more than one solute, you can only have one solvent for a solution. Therefore the statement is true

Answer:

413,000 grams

Explanation:

Answer:

413,000

Explanation: That's because 1 kg equals to 1,000 grams.

the molarity of the solution is 0.03125 M.  we need to use the formula for molarity, which is M = moles of solute / liters of solution.

To find the moles of solute, we first need to calculate the molecular weight of C6H12O6:
6(12.01next  g/mol) + 12(1.01 g/mol) + 6(16.00 g/mol) = 180.18 g/mol next we can use the given mass of 1.25 g and convert it to moles:1.25 g / 180.18 g/mol = 0.00694 mol

Finally, we divide the moles of solute by the volume of solution in liters:
0.00694 mol / 2 L = 0.00347 M or 0.03125 M (rounded to 5 significant figures therefore, the molarity of the solution containing 1.25 g of C6H12O6 is 0.03125 M.6 atoms of carbon, 12 atoms of hydrogen, 6 atoms of oxygen):
Molar mass = (6 x 12.01) + (12 x 1.0)

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The molality of a solution prepared by dissolving 13.3 g of kcl in 750.0 ml of water is 0.23 moles per kilogram.

What is molality?

The molality of a solution is the number of moles of solute present in per kilogram of the solvent is called the molality of the solution and cannot be affected by temperature.

Molality = weight / mass × 1000/ volume if water in ml.

mass of KCl = 74.55

substituting the value in the formula,

molality = 13.3 g / 74.55 × 1000/ 750

molality = 0.23 moles per kilogram.

Therefore, 0.23 moles per kilogram is the molality of a solution prepared by dissolving 13.3 g of KCL in 750.0 ml of water.

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Answer:

Crushing large stones into smaller stones would be a physical change because you are merily crushing its physical size, while the chemical composition for the stone stayes the same.

Answer: C. Na2B4O7•10H2O

Explanation:

Hope this helps :)

The formula is tetrasodium borate-Na2B4O7.10H2O

Given- 0.0132 mol Na2B4O7 and 0.1311 mol H2O

Using the molar mass of the anhydrous Na2B4O7 and its mass percentage, we can calculate the molar mass of the hydrate (if we look at it as 100% of the mass) by stoichiometry.

Molar mass of Na = (22.990 g/mol)

Molar mass of B = (10.811 g/mol)

Molar mass of O = (15.999 g/mol)

Molar mass of Na2B4O7= 2⋅22.990 g/mol +4⋅10.811 g/mol +7⋅15.999 g/mol = 201.217 g/mol

201.217g/mol : 52.8%=x g/mol : 100%

​x g/mol = 201.217 g/mol⋅100%÷52.8 %

x g/mol= 381.093 g/mol

In 381.093 g of hydrate, we have 201.217 g of anhydrous Na2B4O7 , the rest of the mass is water.

381.093g−201.217g= 179.876 g of water

Molar mass of H = 1.008 g/mol

Molar mass of O = 15.999 g/mol

Molar mass of  H2O= 1.008 g/mol+ 15.999g/mol  = 18.015 g/mol

179.876g ÷18.015 = 9.98= 10 moles of water per mole of hydrate.

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Answer: Convection

Explanation:

I hope this helps :D

Answer:

Radiation

Explanation:

It said that was the answer on the test.

A pan of water is sitting outside during a hot sunny day. The temperature of the water goes up. What type of heat transfer caused the temperature to go up?

conduction

induction

Incorrect: convection

Correct: radiation

Answer: in 25 yards there is 75 feet. Witch is the same to say that 25 yards is 75 feet.

Explanation:

Answer:

25yd is bigger

Explanation:

The synthesis and breakdown of fructose-2,6-bisphosphate can be controlled independently through two separate enzymes: phosphofructokinase-2 and fructose-2,6-bisphosphatase (FBPase-2). phosphofructokinase-2 synthesizes fructose-2,6-bisphosphate, while FBPase-2 breaks it down.

The activity of these enzymes is regulated by different signaling pathways and molecules. For example, insulin stimulates phosphofructokinase-2 activity and inhibits FBPase-2 activity, leading to increased fructose-2,6-bisphosphate synthesis. On the other hand, glucagon stimulates FBPase-2 activity and inhibits phosphofructokinase-2 activity, leading to decreased fructose-2,6-bisphosphate synthesis and increased breakdown.

Other signaling molecules, such as AMP and citrate, can also regulate the activity of these enzymes independently. Therefore, the balance between fructose-2,6-bisphosphate synthesis and breakdown can be finely tuned by different signals and metabolic conditions.

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The 22.7 g  in μg ( micro gram )  is 22.7 × \(10^{-6}\) .

We need to convert between units in order to ensure accuracy and prevent measurement misinterpretation.

For example , we do not measure a pencil's length in kilometers . In this situation , one must convert from kilometers  ( km ) to centimeters ( cm ) . In most cases, multiplicative conversion factors are used to convert one unit to another of the same quantity .

Sometimes the units of measurement used may not correspond to the standards required for a particular process or application, as well as the measuring choice and convenience. The mass of object in micro gram unit is less than gram .

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Arrhenius acid

An Arrhenius acid is a compound that increases the concentration of H+ ions that are present when added to water. These H+ ions form the hydronium ion (H3O+) when they combine with water molecules.

It's been a while since I've taken Chemistry but here's what I know:

There are small, weak bonds that form between water molecules. These bonds make it so liquid molecules (water, in this example) cannot move as freely as a gas, but their bonds aren't nearly as strong as a solid. The bonds are formed when a hydrogen atom is attracted to an oxygen atom (because they have an opposite charge). This bond plus the gas molecules hitting the water causes surface tension.

(Let me know if this is wrong and I hope you have a lovely day!!)

The statement "You will have enough gas" is true.

The ideal gas law provides a relationship between pressure (P), volume (V), temperature (T), and the number of moles of gas (n). T

he relationship is given by PV = nRT, where R is the gas constant, which has a value of 8.31 L-kPa/mol-K.

To use this equation, the conditions under which the gas is being measured must be specified.The gas in question is given as having a volume of 25.0 L, a pressure of 101.5 kPa, and a temperature of 373 K.

At STP (Standard Temperature and Pressure), the temperature and pressure are 273 K and 101.3 kPa, respectively. To use this information, we need to calculate the number of moles of gas we have, and then compare that value to the number of moles needed for the reaction.

The equation PV = nRT can be rearranged to solve for n. Dividing both sides by RT, we get:n = PV/RTSubstituting the given values, we obtain:n = (101.5 kPa)(25.0 L) / (8.31 L-kPa/mol-K)(373 K)n = 7.55 mol

The volume of gas required for the reaction is 22.4 L at STP.

To convert this to the conditions we have, we must adjust for the pressure and temperature. The pressure ratio is:

101.5 kPa / 101.3 kPa = 1.00197

The volume ratio is:

273 K / 373 K = 0.73193

Multiplying the ratios gives the conversion factor:

1.00197 × 0.73193 = 0.7332

This means that 22.4 L of gas at STP would occupy 0.7332 × 22.4 L = 16.4 L at 101.5 kPa and 373 K.

The number of moles of gas required for the reaction is:

n = PV/RTn = (101.5 kPa)(16.4 L) / (8.31 L-kPa/mol-K)(373 K)n = 4.89 mol

The amount of gas we have is 7.55 mol, which is greater than the 4.89 mol needed for the reaction.

Hence, the statement "You will have an adequate amount of gas" is accurate.

The question should be:

A reaction requires 22.4 L of gas at STP. You have 25.0 L of gas at 101.5 kPa and 373 K. Which of the following statements is true? (Use the ideal gas law: PV = nRT where R = 8.31 L-kPa/mol-K.)

You will have enough gas

You will have excess gas

You do not have enough gas

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When an atom of carbon-14 (C-14) undergoes radioactive decay in which a neutron is converted into a proton, the resulting atom produced is nitrogen-14 (N-14).

Carbon-14 is an isotope of carbon that contains 6 protons and 8 neutrons in its nucleus. During radioactive decay, one of the neutrons in the C-14 nucleus is converted into a proton. Since the number of protons determines the identity of the element, the resulting atom will have 7 protons. Therefore, it becomes nitrogen-14, which has an atomic number of 7 and 7 neutrons in its nucleus.

The process of converting a neutron into a proton is known as beta decay, which is a common type of radioactive decay observed in isotopes. This conversion leads to a change in the atomic number of the nucleus, resulting in the formation of a different element.

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Answer:

It shows how sunlight triggers transpiration in the plant.

Explanation:

The water eventually is released to the atmosphere as vapor via the plant's stomata — tiny, closeable, pore-like structures on the surfaces of leaves. Overall, this uptake of water at the roots, transport of water through plant tissues, and release of vapor by leaves are known as transpiration.

Answer:

A process in which a chemical change, especially decomposition, is brought about by passing an electric current through a solution of electrolytes so that the electrolyte's ions move toward the negative and positive electrodes and react with them.

Answer:

a pgsysyyssysyysysyshshshshshshshshshshshshshss

Answer:

The correct answer is B. Cs+ represents a cesium ion.

Answer:

Helium

He

atomic number 2.

It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas,

Explanation:

These different types of helium atoms have different masses (3 or 4 atomic mass units ), and they are called isotopes. For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit (amu). By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atom. All elements exist as a collection of isotopes. The word ‘isotope’ comes from the Greek ‘isos’ (meaning ‘same’) and ‘topes’ (meaning ‘place’) because the elements can occupy the same place on the periodic table while being different in subatomic construction.

Answer:

Explanations:

Given the following electronegativity of three elements as:

Answer:

N/A

Explanation:

"what is the anwser to this question" Is Not Available because this no question.

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Deep-water masses retain their temperature and salinity characteristics for long periods of time primarily due to two factors: limited interaction with the atmosphere and slow circulation patterns within the ocean.

Deep-water masses are typically found in the deep layers of the ocean, far removed from the surface where direct interaction with the atmosphere occurs. The exchange of heat and gases between the ocean surface and the atmosphere happens primarily in the upper layers. The deeper waters are insulated from these surface processes, which helps to preserve their initial temperature and salinity properties.

The circulation patterns in the deep ocean are much slower compared to the surface currents. Deep-water masses can take centuries or even millennia to complete a full circulation cycle. This slow movement allows them to retain their characteristics over extended periods.

As these water masses move through the ocean basins, they maintain their distinctive temperature and salinity signatures, making them easily identifiable on temperature-salinity (T-S) diagrams.

T-S diagrams are plots that display the relationship between temperature and salinity in seawater. Deep-water masses, due to their long-term stability and slow mixing with surrounding waters, form distinct clusters or curves on T-S diagrams.

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