Answer:
What?
Explanation:
The urinary bladder is a muscular organ of the excretory system that collects urine excreted by the kidney. How does the nervous system help the urinary system in excretion?
Explanation:
it helps in when the kidney has used the needful nutrients been taken then the unwanted waste product it sends it to the nervous system then the nervous system passes the waste product to the bladder in form of urine
What type of valve is used to vent air that has accumulated in a water pipeline?
a) Air Relief Valve
b) Air Compressor Valve
c) Air Venting Valve
d) Air Binding Valve
Air Relief Valve is specifically designed to vent air that has accumulated in a water pipeline, ensuring the proper flow and pressure of the water.
An Air Relief Valve is used to vent air that has accumulated in a water pipeline, ensuring efficient and safe operation. ir Release Valves are frequently put at the highest point of a pipeline to continuously release undesired air in order to protect against unwanted surges and maintain system performance. Air release valves are used to vent trapped air in fluid pipes. Air release valves should ideally be placed at strategic high places in pipes where trapped air can accumulate. The use of air release valves protects and maintains the pipeline system's efficiency. They're ideal for fast releasing huge volumes of air during filling or startup. They also allow air to return into the pipeline while emptying. Negative pressure can cause pipelines to collapse, therefore this is crucial. A properly sized air release valve is essential for an effective, efficient, and safe air control system. The amount of air accumulated in the system is difficult to determine. Occasionally, 2% of the operational water flow rate is recommended based on the 2% solubility of air in water. Determine the maximum differential pressure that will be tolerated across the valve orifice by calculating the required flow.
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determine the total gas production (volume) of carbon dioxide and methane if 5% of the msw from a community of 10,000 is rapidly decomposable (c68h111o50n). the densities of co2 and ch4 are 1.9768 kg/m3 and 0.7167 kg/m3, respectively.
From a community of 10,000, the total gas production would be approximately 252.92 m3 of carbon dioxide (CO2) and 697.24 m3 of methane (CH4) from the rapidly decomposable fraction of the municipal solid waste.
To determine the total gas production of carbon dioxide (CO2) and methane (CH4) from the rapidly decomposable fraction of municipal solid waste (MSW), we need to calculate the mass of the decomposable fraction and then convert it to volumes of CO2 and CH4 based on their densities.
Given:
Community population: 10,000
Rapidly decomposable fraction: 5% of MSW
Density of CO2: 1.9768 kg/m3
Density of CH4: 0.7167 kg/m3
Let's assume the MSW per capita is 1 kg (for illustrative purposes).
Step 1: Calculate the mass of the rapidly decomposable fraction of MSW.
Total MSW = 10,000 kg
Mass of decomposable fraction = 10,000 kg × 0.05 = 500 kg
Step 2: Calculate the volumes of CO2 and CH4 produced.
Mass of CO2 produced = 500 kg
Mass of CH4 produced = 500 kg
Step 3: Convert the masses of CO2 and CH4 to volumes.
Volume of CO2 produced = 500 kg / 1.9768 kg/m3 ≈ 252.92 m3
Volume of CH4 produced = 500 kg / 0.7167 kg/m3 ≈ 697.24 m3
Therefore, from a community of 10,000, the total gas production would be approximately 252.92 m3 of carbon dioxide (CO2) and 697.24 m3 of methane (CH4) from the rapidly decomposable fraction of the municipal solid waste.
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seaborgium mass number =
Explanation:
seaborgium Is a type of corn that is grown in warm countries.
answer is SG
Answer:
269 u
Explanation:
Which container has gas stored at the highest temperature
Answer: 3
Explanation:
Answer:
kinetic energy
Explanation:
may be iam not sure
Summary about helium
Answer: Helium is an type of air that can be used to inflate balloons, balls, and other things that require air. The carbon dioxide we breath out is similar to this helium.
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At 2000 K the partial pressures of an equilibrium mixture of H2S, H2, and S are 0. 0151 , 0. 0472 , and 0. 0352 atm, respectively. Calculate the value of the equilibrium constant Kp at 2000 K
The equilibrium constant, Kp, for the reaction H₂S ⇌ H₂ + 1/2 S₂ at 2000 K is 0.131.
To calculate Kp, we need to know the balanced chemical equation and the partial pressures of the gases involved. The balanced equation for the given reaction is:
H₂S ⇌ H₂ + 1/2 S₂
The partial pressures for H₂S, H₂, and S₂ are 0.0151 atm, 0.0472 atm, and 0.0352 atm, respectively. Note that the stoichiometric coefficient of S₂ is 1/2. To account for this, we will take the square root of its partial pressure.
Now, we can use the formula for Kp:
Kp = (P_H₂ × √P_S₂) / P_H₂S
Plugging in the given partial pressures:
Kp = (0.0472 × √0.0352) / 0.0151
Kp ≈ 0.131
The equilibrium constant Kp for the given reaction at 2000 K is approximately 0.131.
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Describe how
electrical energy is used in a light bulb
help me pls
Answer:
When the bulb is turned on, an electrical current passes through the filament, heating it up so much that it emits light.
Explanation:
Explain how a mutation becomes an adaptation.
Answer:
An adaptation occurs if a mutation helps an individual survive and reproduce.
Explanation:
Over generations, the mutation will become more common. An adaptation occurs if a mutation isn't passed on to offspring. Hope this helps! xx
in the following equation, what hybridization change, if any, occurs for phosphorus? pcl3 cl2 → pcl5 no change sp2 → sp3 sp → sp2 sp3 → sp sp2 → sp3d sp3 → sp3d
The hybridization change that occurs for phosphorus in the reaction PCl3 + Cl2 → PCl5 is sp3 → sp3d.The hybridization change that occurs for phosphorus in the reaction PCl3 + Cl2 → PCl5 is sp3 → sp3d.PCl3 + Cl2 → PCl5The above reaction is a balanced chemical equation.
The phosphorus (P) atom in PCl3 has a hybridization of sp3, whereas the Cl2 molecule has a hybridization of sp2. During the formation of PCl5, there is a hybridization change in the phosphorus atom from sp3 to sp3d.A change in the hybridization of an atom occurs when it is involved in a chemical reaction. The changes in hybridization occur due to the difference in electronegativity of the atoms in the reactants or due to the bond formation.
For instance, in the reaction PCl3 + Cl2 → PCl5, the reaction occurs due to the formation of a covalent bond between the P atom in PCl3 and Cl atom in Cl2. This causes the electrons in the 3p subshell of the P atom to undergo excitation, resulting in the hybridization change from sp3 to sp3d.Hence, the correct answer is sp3 → sp3d.
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in a laboratory experiment, a student found that a 195-ml aqueous solution containing 2.494 g of a compound had an osmotic pressure of 12.2 mmhg at 298 k. the compound was also found to be nonvolatile and a nonelectrolyte. what is the molar mass of this compound?
The compound's mole ratio in a laboratory setup is 3125.12 g/mol, according to the statement.
Water: an electrolyte or not?Water that is completely free of ions is said to be pure. This could conduct electricity as a result. The inclusion of ions in the mixture allows the solution to carry an electric current when other substances, such as ionic compounds, are dissolved in water.
Briefing:Osmotic pressure is given by;
π = C * R * T
∵ 760 mmHg = 1 atm
10.3 mmHg = 1 * 12.2/760 atm
= 0.016 atm
π = no. of moles * R * T/volume (L)
π = Weight (g) * R * T / Molar mass * V (L)
0.016 atm = 2.494 * 0.082 L atm K⁻¹ mol⁻¹ * 298 K/ M.W * 195 * 10⁻³
M.W = 3125.12 g/mol
Consequently, the compound's molar mass is 3125.12 g/mol.
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the amount of matter in an object is called
Answer: Matter
Explanation:
Matter is anything that has volume and/or mass.
What is an unwanted change that can occur to a solid dissoleved in water when iy is heate to dryness
Answer:
Explanation:
Evaporation and condensation
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is magnetism, reactivity, and fluorescence used to identify minerals
draw the dipeptide alanylvaline (ala−val) as it would exist at neutral ph. amino acid structures can be found in this table. include hydrogen atoms and all appropriate charges.
Ala-Val dipeptide at neutral pH: Ala is negatively charged (COO-), Val is positively charged (NH3+).
(Ala-Val) is a dipeptide composed of two amino acids: alanine (Ala) and valine (Val). At neutral pH, the carboxyl group (COOH) of alanine loses its hydrogen ion (H+) and becomes negatively charged (COO-), while the amino group (NH2) of valine gains a hydrogen ion (H+) and becomes positively charged (NH3+).
The dipeptide can be represented as follows:
H H
| |
H3N+-CH-C-COO-
| |
CH3 CH(CH3)2
Here, the NH3+ represents the positively charged amino group of valine, and the COO- represents the negatively charged carboxyl group of alanine. The hydrogen atoms (H) are attached to the appropriate positions on the carbon backbone.
Please note that this is a simplified representation, and the actual structure of the dipeptide may have different conformations depending on the specific arrangement of atoms and bonds.
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Circle all that apply for the term density:
A) the amount of space an object takes up
B) Amount of matter within an object
C) amount of matter within a given volume
D) the compactness of molecules of an object
E) The amount of movement of the molecules of an object
Answer:
B) Amount of matter within an object
C) amount of matter within a given volume
Explanation:
\({}\)
A____ and _______ takes the shape of their containers
Answer:
liquid
gas
Explanation:
liquid has an indefinite shape
gas has an indefinite shape
Answer:
gas and liquid
Explanation:
gas and liquid flow around and take the shape of their containers because the molecules are more spread apart
Name the following hydrate: ZnSO4·H2O(s)
The name of the given hydrate is zinc sulfate monohydrate. This compound is formed when one molecule of water is attached to one molecule of zinc sulfate.
The chemical formula of zinc sulfate is ZnSO₄ and it is an inorganic compound that is commonly used in industry for various purposes. The addition of one water molecule to the compound forms a hydrate. The prefix "mono-" in the name indicates that there is one water molecule attached to each molecule of zinc sulfate.
Hydrates are compounds that have a certain number of water molecules attached to them. They can be classified based on the number of water molecules they contain. For instance, a compound with two water molecules attached is called a dihydrate, while a compound with three water molecules attached is called a trihydrate. The number of water molecules attached to a compound affects its properties such as its color, solubility, and stability.
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a molecule in a chemical reaction that has its chemical bonds broken is called the _______ in the reaction?
Answer:
reactants
Explanation:
Convert 3,124,991 centimeters (cm) to miles (mi) rounding to 4 sig figs
Answer:
19.417794 mi
Explanation:
Answer:
19.41
Explanation:
The average atomic mass of copper is 63.55 amu. If the only two isotopes of copper have masses of 62.94 amu and 64.93 amu, what are the percentages of each?
Please show work!!!
Explanation:
Let relative ratio of one isotope (62.94 u) be X
Then, relative ratio of other isotope (64.93) will be (1 - X)
Now,
(62.94)x + (64.93)(1 - x) = 63.55
1.99x = 1.38
X = 0.69
Relative Abundance :
(62.94 u) isotope = 69 %
(64.93 u) isotope = 31 %
Ice that contains a small amount of dissolved air is an example of what type of solution?
Answer:
a gas dissolved in a solid
Explanation:
The ice that comprise of small amount of dissolved air represent the type of soluton that have a solid dissolved in a gas.
What is gas?Gas could be considered as the one of the four fundamental states of matter.
A pure gas should be made of individual atoms, elemental molecules that consist from one type of atom, or compound molecules that consist of a variety of atoms.
A gas mixture could be in the form of air that comprise a variety of pure gases.
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A container is filled completely with 197g of ethyl alcohol (density 0.790g/cm3). What is the volume of the container?
Answer:
The volume of the container is 249.367 cm³
Explanation:
Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space. In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance. Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
\(density=\frac{mass}{volume}\)
From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.
Density, according to the International System of Units, is usually expressed in kilogram per cubic meter (kg/m³) or gram per cubic centimeter (g/cm³).
In this case:
density= 0.790 g/cm³mass= 197 gvolume= ?Replacing:
\(0.790 \frac{g}{cm^{3} } =\frac{197 g}{volume}\)
Solving:
\(volume=\frac{197 g}{0.790 \frac{g}{cm^{3} } }\)
volume= 249.367 cm³
The volume of the container is 249.367 cm³
The equation [H+] = 10-pH gives
If the pH of a solution is known, the equation [H⁺] = \(10^{-pH}\) gives hydrogen ion concentration of a substance.
What is the pH of a solution?The pH of a solution is a measurement that described the acidity or basicity of a substance.
The pH of a substance is defined as the negative logarithm of the hydrogen ion concentration of a substance.
Mathematically;
pH = - log [H⁺]
where;
[H⁺] is the hydrogen ion concentration of the substance.
The pH values of a substance range from 0 to 14.
Neutral substances have a pH of 7 while acidic substances have a pH of less than 7 with acidity increasing as the pH values decrease to 0.
Basic or alkaline substances have a pH greater than 7 with basicity increasing as pH values increase to 14.
The hydrogen ion concentration of a solution ca be determined if the pH of the solution is known using the formula:
[H⁺] = \(10^{-pH}\)
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a+patient+receives+160+ml+of+a+4.0+%+(m/v)+amino+acid+solution+twice+a+day.+how+many+grams+of+amino+acids+are+in+160+ml+of+solution?
160 ml of a 4.0% (m/v) amino acid solution contains 6.4 g of amino acids.
We can use the idea of percent concentration to determine how many grams of amino acids are present in 160 mL of a 4.0% (m/v) amino acid solution. Expressed by the mass percent concentration of the solute (amino acid) per 100 ml of solution. Since the solution in this example is 4.0% (m/v), 100 mL of solution contains 4.0 g of the amino acid.
We can make a ratio to determine how many grams are in 160 ml:
4.0 grams / 100 ml = x grams / 160 ml
When we cross multiply for x, we get:
x = (4.0 grams / 100 ml) * 160 ml
x = (0.04) * 160
x = 6.4 grams
Consequently, 160 mL of a 4.0% (m/v) amino acid solution contains 6.4 g of amino acids.
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What are some of the difficulties in identifying particular drugs? Why is it important for forensic scientists to be able to identify particular drugs?
Answer:
The forensic scientist must be able to tell the difference between the substances.
Explanation:
It is important for forensic scientists to be able to identify particular drugs so they have evidence for the case that a certain drug was present.
The goal of forensic drug chemistry is to determine whether the material submitted contains an illegal substance.
What structure in a bacterial cell controls which substances enter and leave the cell?
Answer:
A cell membrane. A cell structure that controls which substances can enter or leave the cell. (found in all cells) In cells with cell walls, the cell membrane is located just inside the cell wall. In other cells, the cell membrane forms the outside boundary that separates the cell from its environment.
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8.5 x 10^-2 standard form
Answer:
Either
8.2
×
10
5
is already in standard notation
or you want
820
,
000
Explanation:
"Standard notation" is often used as a synonym for scientific nation, in which case the given format is already in standard notation.
However, some people use "standard notation" for what we might think of as "common form"
To convert from scientific notation to common form move the decimal point in the mantissa (in this case
8.2
) to the right the number of places indicated by
10
's exponent (in this case 5). [If the exponent is negative the decimal point will be moved to the left].
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explain how phytomining is used to extract copper from low grade ores. Full explanation
Explanation:
-plants that can absorb copper ions are grown on soil with low grade copper ores.
-the plants are burned and the copper compounds are within the Ash.
-copper ions can be leached from the Ash by adding sulphuric acid, this makes a solution of copper sulphate
-the displacement of scrap iron makes pure copper metals.
Plant Extraction (Plant Mining)
crops are grown in soil containing low-grade ore. Plants take up metal ions from the roots and concentrate these ions on the cells. The plants are harvested and burned. The remaining ash contains metal compounds.
How is phytomining used to extract copper?Plants absorb metal ions from their roots in a process called plant mining. It removes toxic metals from contaminated soil-eg around old mines. In the future, when high-grade ore is depleted, it may extract metals by burning plants to produce ash.
How to extract copper from low-grade copper?How to extract copper from low-grade copper ore? Copper is extracted from low-grade copper ore by hydrometallurgy. Cu is treated with cast iron or H2 and leached by acid.
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A loose pile of rocks and soil travels in a single large mass the mass moves a short distance downhill which mass movement does this describe
A. Creep
B. Erosion
C. Landslide
D. Slump