The renal control mechanism of restoring the acid-base balance is accomplished through which process?

Answer:

1.Transport through surface water

2.Transprt through soil

Explanation:

I learned it from my 7th- grade science teacher and suprisingly I still t it. Hope this helps.

Answer:

\(Q=20.6\frac{J}{g}\)

Explanation:

Hello there!

In this case, according to the equation for the calculation of the heat during a heating process:

\(Q=mC(T_f-T_i)\)

It is possible to compute it per gram of ice by just removing m from the equation by dividing at both sides. Next we plug in the given specific heat and the final and initial temperatures to obtain:

\(Q=2.06\frac{J}{g\°C}[-15\°C-(-25\°C)] \\\\Q=20.6\frac{J}{g}\)

Best regards!

Apply Charles law

\(\\ \bf\bull\rightarrowtail V1T2=V_2T1\)

\(\\ \bf\bull\rightarrowtail 10(20)=25V_2\)

\(\\ \bf\bull\rightarrowtail 200=25V_2\)

\(\\ \bf\bull\rightarrowtail V_2=8L\)

Answer:

hope it's helpful to you

Answer:

it's volume also decrease

If helium atoms effuse 4 times faster than gas X, then the ratio of their rates of effusion is 4:1. This means that the molar mass ratio of helium to gas X is (1/4)²= 1/16.

Helium atoms are atoms of the chemical element helium, which is a colorless, odorless, and tasteless gas that is the second lightest element in the periodic table. Helium is a noble gas, which means it is chemically inert and does not readily form compounds with other elements. The atomic number of helium is 2, which means it has two protons in its nucleus and two electrons in its outer shell.

Helium atoms have a very low atomic mass and are therefore very light, which makes them useful for a variety of applications, including as a lifting gas in balloons and airships, as a coolant in nuclear reactors and MRI machines, and as a tracer gas in leak detection and other industrial processes. Helium is also important in astrophysics, as it is a key component of stars and plays a role in the process of nuclear fusion.

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Explanation:

1 sulfur dioxide 2 monosulfur dinitride 10 nitrogen dioxide

Answer:

the concentration of salt dissolved in the ocean

Explanation:

Answer:

Explanation:

Nitrogen has an atomic number of 7

2 in the K shell

7 in the L shell(instead of 8)

8-1=7

Answer:

It gains an electron from another atom in reactions, forming a fluoride ion, F -. Note that the atom is called fluorine, but the ion is called fluoride.

Explanation:

According to the electronic configuration of fluorine and copper in the formation of an ionic compound of copper fluoride electron is lost by copper which is gained by fluorine.

Ionic compounds are the compounds which are formed by the transfer of electrons between the atoms which results in the formation of ions.There are two types of ions:anion and cation which are negatively and positively charged respectively.

These are solid and brittle and are good conductors of electricity and heat only in molten state.The transfer of electrons due to the fact that each atom strives to achieve stable electron electronic configuration in doing so it looses or accepts valency as per it's electronic configuration.

In case of copper fluoride, 2 valence electrons of copper are lost which are gained by 2 fluorine atoms resulting in stable electronic configuration of each atom and a stable ionic compound of copper fluoride is formed.

Thus, as per electronic configuration of fluorine and copper in the formation of an ionic compound of copper fluoride electron is lost by copper which is gained by fluorine.

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Answer:

0.0022 concentration

Explanation:

concentration = moles of solute / liters of solution

first off, convert 125g of potassium sulfate into moles. we can do this using conversion factors. the conversion factor we will use is potassium sulfate's molar mass.

125g K2SO4 * ( 1 mol / 174.259) = 0.720 moles potassium sulfate

then, we follow the concentration formula

0.720 moles potassium sulfate / 325.6 L = 0.0022 concentration

The gravity force on an object from the Earth is the same regardless of whether the object is surrounded by air .

the Earth has an average gravitational force. Different locations on Earth have gravitational forces that are larger or smaller than average. This is because each location has more or less mass than the average

Measuring the conductivity and comparing it with a calibration curve of known mixtures, you can determine the percent composition of a mixture of sugar and salt.

To determine the percent composition of a mixture of sugar and salt using conductivity, you can follow these steps:

Measure the electrical conductivity: Begin by measuring the electrical conductivity of the mixture. Electrical conductivity is a property that quantifies the ability of a substance to conduct an electric current. In this case, the conductivity of the mixture will be influenced by the presence of sugar and salt.

Conductivity of pure substances: Next, measure the conductivity of pure sugar and pure salt solutions separately. This step is important to establish a baseline and determine the conductivity values of each substance individually.

Prepare calibration solutions: Prepare several calibration solutions by mixing known amounts of sugar and salt in different ratios. For example, you can create solutions with 10% sugar and 90% salt, 20% sugar and 80% salt, and so on. Measure the conductivity of each calibration solution.

Create a calibration curve: Plot a graph with the percent composition of sugar on the x-axis and the corresponding conductivity values on the y-axis. The calibration curve should indicate the relationship between the percentage of sugar in the mixture and the conductivity.

Measure the mixture conductivity: Measure the conductivity of the mixture containing the unknown percentage of sugar and salt. Use the calibration curve to determine the corresponding percent composition of sugar in the mixture.

By comparing the conductivity of the mixture with the calibration curve, you can determine the percentage of sugar in the mixture. This method relies on the fact that different substances have varying conductivities, allowing you to correlate conductivity measurements with the composition of the mixture.

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Percent yield = 70%

Percent yield is the comparison of the amount of product obtained from a reaction with the amount you calculated

General formula:

Percent yield = (Actual yield / theoretical yield )x 100%

An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients

Reaction

2H₂ (g) + O₂ (g) → 2H₂O (g)

\(\tt mass=mol\times MW(mol~ratio~H_2O\div H_2=2\div 2)\\\\mass=(\dfrac{2}{2}\times \dfrac{13.8}{2})\times 18~g/mol\\\\mass=124.2~g\)

\(\tt \%yield=\dfrac{87}{124.2}\times 100\%=\boxed{\bold{70\%}}\)

Answer: i think it is A

Explanation:

hope this helps!

Answer:

neutrons = mass number - atomic number

. = 39-19 =20

The standard reduction potential for the half-reaction M3+(aq) + 3e- → M(s) can be determined by subtracting the standard reduction potential of the half-reaction Ag+(aq) + e- → Ag(s) from the overall reaction's standard potential.

Given:

E°(overall reaction) = +2.46 V (from the balanced equation)

E°(Ag+(aq) + e- → Ag(s)) = +0.80 V (given)

To find E°(M3+(aq) + 3e- → M(s)):

E°(M3+(aq) + 3e- → M(s)) = E°(overall reaction) - E°(Ag+(aq) + e- → Ag(s))

E°(M3+(aq) + 3e- → M(s)) = +2.46 V - (+0.80 V)

E°(M3+(aq) + 3e- → M(s)) = +1.66 V

Therefore, the standard reduction potential for the half-reaction M3+(aq) + 3e- → M(s) is +1.66 V.

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Answer:

Phosphate, any of numerous chemical compounds related to phosphoric acid (H3PO4).

100.0 g of oxygen gas at a pressure of 1.5 atm and a temperature of 25°C would occupy a volume of 49.2 L.

To solve this problem, we can use the Ideal Gas Law, which states:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

We need to rearrange this equation to solve for the volume V:

V = (nRT) / P

where n is the number of moles of the gas, which we can calculate using the molar mass of oxygen gas:

n = m / M

where m is the mass of the gas and M is the molar mass of oxygen gas (32 g/mol).

n = 100.0 g / 32 g/mol = 3.125 mol

Now we can substitute the given values into the equation to find the volume:

V = (nRT) / P

V = (3.125 mol)(0.0821 L·atm/mol·K)(298 K) / 1.5 atm

V = 49.2 L

Therefore, 100.0 g of oxygen gas at a pressure of 1.5 atm and a temperature of 25°C would occupy a volume of 49.2 L.

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Answer:

B.

Explanation:

Atoms make up molecules and ionic bonds cannot make up a molecule because they do not share electrons like in a covalent bond.

In an electrolytic cell, the electrode that acts as a source of electrons to the solution is called the cathode; the chemical change that occurs at this electrode is called reduction.

An electrolyte is a material that separates into charged ions when it is in contact with water. Cations are positively charged ions. Anions are ions that are negatively charged. A substance that may conduct an electric current when melted or dissolved in water is known as an electrolyte.

There are three main categories of electrochemical cells. the galvanic cell, the concentration cell, and the electrolytic cell. These cells all share the same four fundamental components. These are the elements

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Answer:

Bigger particals first but I would say rocks or pebbles

Explanation:

During flood, when the stream slows down, the clay and sand sediments will deposited first sinc particle size is small.

Flood is a natural calamity where, the water reservoirs overflows to the land area and leads to destruction in buildings and houses. The results depends on the speed of water flow.

Flood occurs due to the pressure difference beneath water and due to heavy rain. There are many more evidences, that flood caused significant losses in land areas in many coutries.

The flow of particles with the stream bed depends on their size and weight. The massive particles will only flow and sediment when the stream flows with greater speed. Thus, sand and clay particles sediment first and other heavy particles will flow slowly and deposit later.

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Answer:

20°C and 2 atm is correct

Explanation:

Answer:

C. the amount of drug x given to mice

The unknown metal X is iron metal as it reacts with copper sulfate solution but does not react with magnesium chloride.

Some metals are very reactive while other metals are less reactive or unreactive. When a more reactive metal is added to the solution of a less reactive metal, then the more reactive displaces the less reactive metal from its solution is known as a displacement reaction.

The general form of a single displacement reaction can be represented as:

\(A + BC \longrightarrow B + AC\)

When iron is placed in copper sulfate (CuSO₄) solution then the blue color of the copper sulfate solution turns a red-brown coating of copper metal deposited on the iron.

\(CuSO_4 (aq)+ Fe (s)\longrightarrow FeSO_4 (aq) +Cu(s)\)

Iron lies above the electrochemical series and is more reactive than copper. So it reacts with copper sulfate but does not give any reaction with magnesium chloride.

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Approximately 29.5 g of NaCN is required to make 14.7 L of HCN at STP.

To solve this problem, we will use the ideal gas law to calculate the number of moles of HCN produced and then use stoichiometry to determine the mass of NaCN required.

First, we need to determine the number of moles of HCN produced using the ideal gas law:

\(PV = nRT\)

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

At STP (standard temperature and pressure), P = 1 atm and T = 273 K. The volume of HCN produced is given as 14.7 L.

Plugging these values into the ideal gas law, we get:

\(n = PV/RT = (1 atm) *(14.7 L)/(0.0821 L atm/mol K * 273 K) = 0.603 mol\)

So, 0.603 mol of HCN is produced.

Now we can use stoichiometry to determine the mass of NaCN required. From the balanced chemical equation:

NaCN + HCl → NaCl + HCN

we can see that 1 mole of NaCN produces 1 mole of HCN.

Therefore, the mass of NaCN required can be calculated as:

mass of NaCN = number of moles of NaCN x molar mass of NaCN

The molar mass of NaCN is 49.01 g/mol.

So, the mass of NaCN required is:

mass of \(NaCN = 0.603 mol * 49.01 g/mol = 29.5 g\)

Therefore, approximately 29.5 g of NaCN is required to make 14.7 L of HCN at STP.

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The speed of a chemical reaction, also known as its reaction time, is the change in the concentration of reactants or products over a specific period. This speed can be influenced by factors such as temperature, concentration, and the presence of catalysts. In general, a faster reaction speed indicates a quicker transformation of reactants into products during the chemical reaction.

The speed of a chemical reaction refers to how fast or slow a chemical reaction takes place. It is determined by the rate at which the reactants are consumed and the products are formed. The chemical reaction time can be explained by the rate of collision between the reacting molecules. When two molecules collide with enough energy, they can break their bonds and form new ones, resulting in a chemical reaction. The more collisions that occur in a given amount of time, the faster the chemical reaction will proceed. Therefore, the speed of a chemical reaction is dependent on the frequency and energy of collisions between the reacting molecules.

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The volume (in milliliters) of the 2.00 M NaOH solution that can be produced from the reaction is 955 mL

First, we shall determine the mole of 44.00 grams of Na that reacted. Details below:

Mole = mass / molar mass

Mole of Na = 44 / 22.99

Mole of Na = 1.91 moles

Next, we shall determine the mole of NaOH obtained from the reaction. Details below:

2Na + 2H₂O -> 2NaOH+ H₂

From the balanced equation above,

2 moles of Na reacted to produced 2 moles of NaOH

Therefore,

1.91 moles of Na will also react to produce 1.91 moles of NaOH

Finally, we shall determine the volume of the 2.00 M NaOH produced. Details below:

Volume = mole / molarity

Volume of NaOH = 1.91 / 2

Volume of NaOH = 0.955 L

Multiply by 1000 to express in milliliter

Volume of NaOH = 0.955 × 1000

Volume of NaOH = 955 mL

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The expected product in the reaction of compound C with compound D is unknown based on the information provided. To calculate the theoretical yield, we need the balanced chemical equation for the reaction. Without this information, we cannot determine the theoretical yield or calculate the percent yield.

However, if we had the balanced equation, we could use the given amounts of compound C and compound D to determine the limiting reactant and calculate the theoretical yield.

The percent yield is then calculated by dividing the actual yield (0.5 gm) by the theoretical yield and multiplying by 100. Without the necessary information, we cannot provide specific values for the theoretical or percent yield in this case.

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Answer:

C. 7.50g

Explanation:

The percent (%) by mass of a solute in a solution refers to the number of grams contained in 100g of solution by that solute. In this case, 5% by mass of pottasium chloride (KCl) means 5g of KCl is contained in 100g of solution.

Therefore, in 150g of solution, there would be:

5g/100g × 150g

= 0.05 × 150

= 7.50g of KCl solute.

Hence, 7.50g of pottasium chloride would be expected to be collected by evaporating 150.0 g of the solution.

The mass of the hydrate is 5.3792 grams and the mass of the anhydrous salt after the 3rd heating is 3.1459 grams.

A hydrate is a compound that contains a specific number of water molecules chemically bound to its structure. The formula of the hydrate is \(M(NO_3)_3_d_o_t_s * H_2O\), where M represents a metal.

A. Given information:

To determine the mass of the hydrate, subtract the mass of the crucible and lid from the mass of the crucible, lid, and hydrate:

Mass of hydrate = Mass of crucible, lid, and hydrate - Mass of crucible and lid

Mass of hydrate = 39.7109 g - 34.3317 g

Mass of hydrate = 5.3792 g

B.  Given information:

Mass of anhydrous salt = Mass of crucible, lid, and anhydrous salt - Mass of crucible and lid.

Mass of anhydrous salt = 37.3999 g - 34.2540 g

Mass of anhydrous salt = 3.1459 g

Therefore, the mass of the hydrate is 5.3792 grams, and the mass of the anhydrous salt after the 3rd heating is 3.1459 grams.

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Complete question:

A. Given the following data for the hydrate \(M(NO_3)_3_d_o_t_s * H_2O\), where M is a metal with an atomic mass of 79.01 g/mol,

Mass of Crucible and Lid 34.3317 g

Mass of Crucible, Lid, and Hydrate 39.7109 g

Mass of Crucible, Lid, and Anhydrous Salt 37.0499 g

What is the mass of hydrate, with correct significant figures?

B. Given the following data for the hydrate \(M(NO_3)_3_d_o_t_s * H_2O\), where M is a metal with an atomic mass of 78.37 g/mol,

Mass of Crucible and Lid  34.2540 g

Mass of Crucible, Lid, and Hydrate 39.1031 g

Mass of Crucible, Lid, and Anhydrous Salt 37.3999g

What was the mass of the anhydrous salt after the \(3^r^d\) heating, with the correct significant figures?