I’m unsure how to answer this with sig figs in mind:Use scientific notation to to express this quantity: 131. mg

Answer:

it is directly related to the intermolecular forces present between its molecules

Answer:

a series of reactions in which particles from one reaction trigger the next reaction

Explanation:

cause thats a chain

There are approximately 12.7 grams of phosphorus in a 50-gram sample of aluminum phosphate.

To determine the number of grams of phosphorus in a 50-gram sample of aluminum phosphate, we need to know the molar mass and the chemical formula of aluminum phosphate.

The chemical formula for aluminum phosphate is AlPO4. It indicates that each molecule of aluminum phosphate contains one aluminum atom (Al), one phosphorus atom (P), and four oxygen atoms (O).

To calculate the molar mass of aluminum phosphate, we can add up the atomic masses of its constituent elements based on their stoichiometric ratios:

Molar mass of AlPO4 = (molar mass of Al) + (molar mass of P) + (4 * molar mass of O)

Using the periodic table, we can find the atomic masses of the elements:

Molar mass of Al = 26.98 g/mol

Molar mass of P = 30.97 g/mol

Molar mass of O = 16.00 g/mol

Now, let's calculate the molar mass of aluminum phosphate:

Molar mass of AlPO4 = (26.98 g/mol) + (30.97 g/mol) + (4 * 16.00 g/mol)

= 121.95 g/mol

The molar mass of aluminum phosphate is 121.95 g/mol.

To determine the number of grams of phosphorus in a 50-gram sample of aluminum phosphate, we need to calculate the mass fraction of phosphorus in the compound. The mass fraction is the ratio of the molar mass of phosphorus to the molar mass of aluminum phosphate.

Mass fraction of phosphorus = (molar mass of P) / (molar mass of AlPO4)

= (30.97 g/mol) / (121.95 g/mol)

≈ 0.254

Multiplying the mass fraction by the mass of the sample gives us the grams of phosphorus:

Grams of phosphorus = (mass fraction of phosphorus) * (mass of the sample)

= 0.254 * 50 g

≈ 12.7 g

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Answer:

no change in the temperature of the gas.

Explanation:

isothermal process of a gas, can result to compression of the gas or expansion of the gas at a constant temperature (ΔT = 0).

For isothermal gas expansion, work is done in reducing the pressure of the gas by increasing its volume at a constant temperature. The change in the internal energy of this process is zero (ΔU = 0).

For isothermal gas compression, work is done in decreasing the volume of the gas by increasing its pressure at a constant temperature. The change in the internal energy of this process is also zero (ΔU = 0).

Therefore, when a gas undergoes an isothermal process, there is no change in the temperature of the gas.

Answer:

The correct answers are:  decrease and decrease.

Explanation:

Phytoplanktons are the producers in this ecosystem while marsh snails are the primary consumers and painted turtles are the secondary consumers. It is known that the producers affect direct or indirect to all other trophic levels and it is also known that in the food chain decrease in the producer or bottom of the chain will affect all.

The numbers of marsh snails will decrease due to its food source and as painted turtles depend on marsh snail the population of these also decrease as marsh snails are the primary food source of the painted turtles.

Answer:

1and1

Explanation:

At STP, a mole of pure gas is closest in size to a marble. As a tiny, solid material, a gram of gas at the STP is considerably smaller than a marble. D is the correct response.

At Standard Pressure and Temperature, 22.4 L of any gas will be required to hold 1 mole (STP). The Ideal Gas Law and a balanced chemical equation can be used to determine the amount or mass of gas consumed or created in a chemical process. In other words, the gas that has the greatest number of molecules of a certain gas at a given temperature will occupy the largest volume.

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Question: From the following items, which is closest in size to one mole of gas at STP?

A) A car

B) An elephant

C) A microwave

D) A marble

Answer:

O(Oxygen)

Explanation:

Oxygen or O among the given options has the highest electronegativity of 3.5 as compared to 2.4 of sulfur. Thus, there is a lesser attraction in the bonds of Sulfur. The other two elements Al(Aluminium) and Cu are less electronegative than Sulfur and Oxygen as they are metals and possess electropositivity while the latter displays more electronegativity due to being non-metals. Hence, Oxygen is the answer.

Answer: 3.It increases when the temperature increases.

Explanation:

The speed of most chemical reactions increase as if the temperature of those same reactions increase as well. This is because a higher temperature allows for reactants to gain the necessary activation energy needed to react.

Enzymes are another reason. Enzymes are catalysts in reactions which reduce the activation energy needed for a reaction to occur and enzymes work best in certain higher temperatures - not too high - so this also leads to the reaction speed increasing due to temperature increases.

Answer:

It increases when the temperature increases.

Explanation:

I took the test and the other guy is right ;)

Oxoacids get more acidic as the number of oxidations on the halogen rises.

Perchloric acid is the most potent acid there is. As NH 4Br is an acidic salt, the solution will be acidic even though the Br ions come from a strong acid (HBr), but the NH 4 + ions come from a weak base (NH 3). Br2 is therefore regarded as a mild Lewis acid. Large acceptor atoms in soft acids have a low positive charge, are highly polarisable, and have poor electronegativity. One of the finest nucleophiles, the bromide ion is a poor base. It chooses to take on a nucleophilic role.

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The volume of apple juice could  a diabetic person drink : 100 ml

Given

sugar allowance = 8 g

sugar concentration of apple juice : 8.0% w/v

Required

Volume of apple juice

Solution

The concentration of a substance can be expressed in several quantities The concentration shows the amount of solute in a unit of the amount of solvent.

% w/v = mass of solute (weight) in g / 100 ml solution

So for 8% w/v = 8 g of sugar(solute) in 100 ml of apple juice

Acids are substances that turn wet blue litmus paper to red while bases are substances that turn red litmus paper to blue.

Acids and bases can be differentiated using their definitions as follows:

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Acid has hydrogen ion whereas base has hydroxyl ion.

Acid is a type of chemical compound that is dissolved in water and gives a solution with Hydrogen ions more than purified water. A base is a substance that gives electrons, takes protons, or releases hydroxide (OH-) ions. Acid is also called a proton donor. While a base is also called a proton acceptor.

Acids have a sour taste whereas Bases have a bitter taste. The pH value of acid is lower than 7. Basis has a pH value higher than 7. The strength of Acid depends on the number of Hydrogen ions. The strength of the Base depends on the amount  of Hydroxide ions

An acid is any hydrogen-carrying substance that is able of giving a proton that is to say a hydrogen ion to another substance. A base is a molecule or ion able to gain a hydrogen ion from an acid.

so we can conclude that the molecules which have hydrogen ions are considered acids while those molecules which have hydroxyl ions are considered bases.

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Answer:

because it is a sign that there are more producers for the consumers.

Explanation:

An ecosystem consist of the abiotic or inorganic components, the animals[consumers], the plants[producers] and the decomposers. An ecosystem simply means the environment of organisms that are living together and the way these organisms interact with another.

The producers that is the plants are the ones manufacturing food by themselves either by photosynthesis or chemosynthesis and the consumers are the ones relying on the producers for food.

The ecosystem is still healthy even when there's still a lot of consumers in it because it shows that there are come producers that is to say the producers are more also. If this is not the case, then the ecosystem will not be healthy as the consumers will eat the producers until the producers will not be enough.

a) New velocity = 2.093 m/s

b) Volumetric flowrate in 100 mm diameter pipe= 157 liter/sec

    Volumetric flowrate in 150 mm diameter pipe = 355 liter/sec

c) Mass flowrate in pipe 1=  0.0075 m²/s

   Mass flowrate in pipe 2 =  0.017 m²/s

In fluid dynamics, the volume of fluid which passes per unit time is called volumetric flow. It is denoted by the symbol Q.

Given d= 100mm= 0.1m

and average velocity= 2m/s

A= π/4 *d²

= π/4 *(0.1)²

= 0.0075 m²/s

Q= A* V

= 0.0075 * 2

= 0.0157 m³/s

= 157 liter/sec

when d= 150mm= 0.15m

V = Q/A

= 0.0157/0.0075

= 2.093 m/s

A=  π/4 *(0.15)²

= 0.017 m²/s

Q=A *V

=0.017* 2.093

= 0.035m³/s

= 355 liters/sec

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Mass of Mg is 2.39g and Mass of MgO is 3.48 g. Mg is a chemical element Magnesium.

The average mass of an element's atoms expressed in atomic mass units is the element's atomic mass. The mass of each isotope is multiplied by its abundance to produce the atomic mass, which is a weighted average of all the isotopes of that element.

The atomic mass of an element, measured in amu, is equal to the mass in grammes of one mole of an element. This relationship between the atomic mass and the mole concept is important in chemistry.

Mass of Mg = Mass of crucible and Mg - Mass of empty crucible = 38.06g - 35.67g = 2.39g

Mass of MgO = 39.15 g - 35.67 g = 3.48 g

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Maltose is a disaccharide important in the formation of alcoholic beverages.

Maltose:

Maltose, also known as maltobiose or maltose, is a disaccharide formed from two glucose units linked by α(1 → 4) bonds. In isomeric isomaltose, the two glucose molecules are linked by an α(1 → 6) bond. Maltose is both members of the amylose homologous family, which is the major structural motif in starch. When beta-amylase breaks down starch, it removes two units of glucose at a time to form maltose. An example of this reaction can be found in germinating seeds, which is why malt is named after it. Unlike sucrose, it is a reducing sugar.

Also known as malt sugar, it is made up of two glucose molecules bonded together. It is an important disaccharide in the formation of alcoholic beverages.

Alcoholic Beverage:

Alcoholic beverages (also called alcoholic beverages, adult beverages, or beverages) are beverages that contain ethanol, a type of alcohol that acts like a drug and is made by fermenting grains, fruits, or other sources of sugar. Drinking alcoholic beverages, often referred to as "drinking", plays an important social role in many cultures. Most countries have laws regulating the production, sale and consumption of alcoholic beverages.

Regulations may require the alcohol percentage (alcohol or proof) to be displayed and warning labels to be used. Alcoholic beverages are legal in most countries around the world, although in some countries such activities are outright banned. The global liquor industry passed $1 trillion in 2018.

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Answer:

Ethanol is a disaccharide important in the formation of alcoholic beverages. Ethanol is produced by yeast during fermentation when sugar is converted to alcohol. This process involves the breaking down of carbohydrates, such as glucose and fructose, into simple sugars, which are then converted into ethanol.

Answer:

The answer is option 4.

Explanation:

Chloroplast is the place where they absorb sunlight to perform photosynthesis to produce food.

Answer:

D:salt this is the correct answer

Answer:

 r =  \(\sqrt{\frac{v}{\pi h} }\)

27.2cm

Explanation:

Given parameters:

Height of tank  = 6461.76cm

Volume of water  = 15000000cm³

Volume of cylinder  = \(\pi\) r² h

i. Express radius in terms of volume;

  we are to make radius the subject of the expression;

              v = \(\pi\) r² h  

     divide both sides by πh

         \(\frac{v}{\pi h}\)   = \(\frac{\pi r^{2}h }{\pi h }\)  

              r²   =  \(\frac{v}{\pi h}\)

              r =  \(\sqrt{\frac{v}{\pi h} }\)

ii.

Radius of the water tank;

             r  = \(\sqrt{\frac{15000000}{\pi x 6461.76} }\)   = 27.2cm

Answer:

The answer is "Option D".

Explanation:

The entire ionic equation for all the substances, which are ionic compounds but are available in an aquatic is represented in the form with ions in the full ionic equation.  

In the Net ionic equation, it doesn't have the particulate matter throughout the net ionic equations throughout the equations.  

In the Spectator ions, it doesn't participate in interactions mostly on reaction and the material hand. From both sides, the very same ions are present.  

The evenly balanced chemical formula is,

\(2KOH (aq)+ H_2SO_4(aq) \longrightarrow 2H_2O(l) + K_2SO_4\)

It is the separate organic compound that full ion formula will match the choice D.

It is true that electromagnetic waves can travel in empty space or space that has no particles.

The correct option is True.

Waves of the electromagnetic field make up electromagnetic radiation; they travel through space while carrying momentum and radiant energy. It consists of X-rays, gamma rays, microwaves, infrared, light, and radio waves.

Electromagnetic waves include radio waves, television waves, and microwaves. The only thing separating them is the wavelength. The wavelength is the distance between each wave's peak and the next.

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To calculate the work done by expanding the gas in the cylinder, we can use the formula for reversible adiabatic expansion:

Work = (p1V1 - p2V2) / (γ - 1),
where p1 and p2 are the initial and final pressures, V1 and V2 are the initial and final volumes, and γ is the specific heat ratio.
In this case, the initial pressure is 20 atm and the final pressure is 1 atm. Assuming the volume changes, we need more information to proceed with the calculation. However, we can make some comments.
The change in internal energy (ΔU) of the gas is given by the formula

ΔU = Q - W,

where Q is the heat added to the system and W is the work done on the system. Since the expansion is adiabatic (no heat exchange),

ΔU = -W.
The change in enthalpy (ΔH) of the gas is given by the formula

ΔH = ΔU + Δ(PV).

For an adiabatic process,

Δ(PV) = 0,

so ΔH = ΔU.
If the temperature is raised to 1200 K before the expansion begins, the initial conditions change. To determine the work of expansion, we need more information about the volume changes.
When repeating the calculations using argon as the working fluid, the specific heat ratio (γ) changes.

Argon has a different γ value compared to air, which leads to a different result.

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Answer:

The liquid state sometimes is described simply as the state that occurs between the solid and gaseous states. Some examples of liquids are:

- Water

- Milk

- Vinegar

Unlike a liquid, a solid object does not flow to take on the shape of its container, nor does it expand to fill the entire available volume like a gas. Some examples of solids are:

- Rocks

- Brick

- Coin

What distinguishes a gas from liquids and solids is the vast separation of the individual gas particles. This separation usually makes a colorless gas invisible to the human observer. Some examples of gases are:

- Helium

- Oxygen

- Neon

Mass number 28: Nickel.

15 neutron: Phosphorus.

The  element has a mass number of 28 and 15 neutrons is Aluminium.

         A= P +N

Now given an element with  mass number 28 and 15 neutrons, we first find the proton number

A= P +N

28= P +15

P=28-15

P=13

The proton number of an element is also the same as its atomic number,The atomic number of an element tells us the identity of that element , therefore the element with atomic number 13 is  Aluminum

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Answer:

The answer to your question is D

Answer:

its d bro so easy

Explanation:

because it talks about nature and nuture so samantha inherited it and also learned stuff

Balanced equation

2Pb(NO₃)₂⇒2PbO+4NO₂+O₂

Given

Reaction

Pb(NO₃)₂⇒PbO+NO₂+O₂

Required

Balanced equation

Solution

Pb(NO₃)₂⇒aPbO+bNO₂+cO₂

Pb, left=1, right=a⇒a=1

N, left=2, right=b⇒b=2

O, left=6, right=a+2b+2c⇒6=1+2.2+2c⇒6=5+2c⇒1=2c⇒c=1/2

The reaction becomes :

Pb(NO₃)₂⇒PbO+2NO₂+1/2O₂ x2

2Pb(NO₃)₂⇒2PbO+4NO₂+O₂

Answer:

3.18 L

Explanation:

Step 1: Given data

Step 2: Convert P₁ to mmHg

We will use the conversion factor 1 atm = 760 mmHg.

0.985 atm × 760 mmHg/1 atm = 749 mmHg

Step 3: Calculate the final volume of the gas

Assuming ideal behavior and constant temperature, we can calculate the final volume using Boyle's law.

P₁ × V₁ = P₂ × V₂

V₂ = P₁ × V₁/P₂

V₂ = 749 mmHg × 3.65 L/861.0 mmHg = 3.18 L

The minimum internal temperature for poultry is set higher than that for beef or fish due to the risk of foodborne illness caused by bacteria such as Salmonella and Campylobacter that are commonly found in poultry.

These bacteria can be present on the surface of the poultry and can also be present in the internal tissues, such as the liver and intestines.

To kill these bacteria and reduce the risk of foodborne illness, it is recommended that poultry be cooked to an internal temperature of at least 165°F (74°C). This temperature is sufficient to kill harmful bacteria that may be present in the poultry.

In contrast, beef and fish are generally considered to be lower-risk foods in terms of bacterial contamination.

While it is still important to cook these foods to a safe temperature to ensure they are fully cooked and free from harmful bacteria, the minimum internal temperature requirements are lower than for poultry.

For example, beef is typically cooked to an internal temperature of 145°F (63°C), while fish is typically cooked to an internal temperature of 145°F to 150°F (63°C to 66°C), depending on the type of fish.

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