a scientist wants to make a solution of tribasic sodium phosphate, na3po4 , for a laboratory experiment. how many grams of na3po4 will be needed to produce 325 ml of a solution that has a concentration of na ions of 1.40 m ?

Answer:

Explanation:

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\(\\ \purple{MaggieEve}\)

Answer:

No

Explanation:

Hello!

Only one element can have the same number of protons.

Proton amount is basically like the DNA of a proton; it makes them what they are.

When elements are isotopes instead, their neutron count changes but their protons remain the same.

For example, all carbons have 6 protons regardless of if they are an isotope or not. A carbon-12 and a carbon-14 will still have 6 protons, but different amount of neutrons.

Answer: it attaches to the fur of an animal, and it sprouts after it falls from the animal’s fur

Explanation:

To solve this we must have a claeas concept behind Farsightedness and nearsightedness. Therefore, distant objects are blurry,  describes farsightedness. The correct option is option A.

Farsightedness (hyperopia) is a common visual issue in which you can clearly see far things but have fuzzy vision of nearer items. Your capacity to focus is affected by your degree of farsightedness.

Farsightedness is most usually caused by an eyeball that is too short or by a cornea (the transparent layer at the front of the eye) that is not curved enough. Light cannot focus directly on the retina due to these two issues. Light instead concentrates behind the retina, making close-up objects appear fuzzy.

Therefore, distant objects are blurry,  describes farsightedness. The correct option is option A.

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Answer:

B. He

Explanation:

The more linear the bond, the stronger the attraction this statements about hydrogen bonds is false

Hydrogen bonds refer to the type of non-covalent bond that exists between molecules. It arises when hydrogen atoms with partial positive charges (d⁺) are attracted to electronegative atoms (d⁻) in another molecule. There are three key features of hydrogen bonding: a hydrogen donor, a hydrogen acceptor, and a hydrogen bond. Here are some true statements about hydrogen bonding: It is a type of non-covalent bond. The donor is a hydrogen atom bonded to a less electronegative atom than hydrogen.  The acceptor must contain a non-bonded pair of electrons.

However, the statement that says "the more linear the bond, the stronger the attraction" is false. The strength of the hydrogen bond depends on various factors, including the distance between the donor and acceptor, the angle between the hydrogen donor and acceptor, and the strength of the hydrogen bond.

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All of the above-mentioned pieces of lab equipment can be used to measure the volume of water in a drinking glass.

However, each piece of equipment has its own advantages and limitations.

A graduated cylinder is a common piece of lab equipment used for accurate measurement of liquid volumes. It has markings along the side that allow for precise measurement of the volume of liquid in the cylinder.

A volumetric flask is a piece of lab equipment designed to measure and hold a precise volume of liquid. It has a narrow neck and a flat bottom, and is typically used for preparing solutions of a specific concentration.

A graduated beaker is similar to a graduated cylinder, but has a wider base and is less accurate for measuring small volumes of liquid.

All three pieces of equipment can be used to measure the volume of water in a drinking glass, but the choice of equipment will depend on the required accuracy and precision of the measurement. A graduated cylinder would be the most accurate choice, while a graduated beaker may be sufficient for less precise measurements.

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Answer:

i think it will "Equal to 75 Kg"

Explanation:

object/person remains same, his mass is somewhere, so it would remain same everywhere. Only Weight of a person changes with gravity

hope i helped

-lvr

Answer: D 25 degrees

Explanation: The reason because is 25x4=100 and slightly tilted =1/4 of the earth which is 25

Answer:

a po

Explanation:

promise HAHAHAHHAHAHAH

Answer:

isotopes

Explanation:

trust me

Answer:

producers typically enter a developing ecosystem before consumers.

Explanation:

Ecological succession is the process by which an ecosystem undergoes a series of changes as communities of organisms change their environment and new communities of organisms move in to the ecosystem. During the process of succession, producers typically enter a developing ecosystem before consumers. The producers modify the environment and makes it more suitable for the consumers.

(i had this on study island BTW)

\(\\ \sf\longmapsto 12579nm\)

\(\\ \sf\longmapsto 12579\times 10^{-9}m\)

\(\\ \sf\longmapsto 1257.9\times 10^{-8}m\)

\(\\ \sf\longmapsto 12.5\times 10^{-6}m\)

\(\\ \sf\longmapsto 12.5\mu m\)

Answer:

1.26e-5

Explanation:

Change 12579 nm to meters first, it becomes 1.2579e-5, then rounding it to 3 significant figures becomes 1.26e-5.

False. Because the scientific study of behavior of the substances near 0k is called cryogenics.

The behavior of the substance at very low temperature is called cryogenics. This is the branch of engineering that involves the study of very low temperatures that are below 123k.Rapid moving molecules in a substance  have a higher temperature than slower moving molecules. Ultra cold temperature changes the chemical properties of materials. It is used to produce cryogenic field  for rockets MRI machines, storing large quantity of food. It is also used in freezing blood sample and tissues. This is also use preservation of organs.

Pyrogenic is the formation of the particle by means of flame oxidation of metals in gas phase. This is the study of temperature between 1000c to 2400c.this is produced by producing heat.it generally produced in human body caused by fever.

So, the behavior of a substance at 0k is called cryogenics not pyrogenic.

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Part 1:  Reasons young workers don't report injuries. Young workers are at an increased risk of workplace accidents and injuries due to their inexperience, lack of training, and physical and emotional immaturity. However, young workers are less likely to report accidents or injuries than older workers.

Some of the reasons for this are:

1. Fear of reprisal: Young workers fear being blamed or reprimanded for an accident or injury, which may result in termination or the loss of opportunities for advancement. They are afraid to speak up and report accidents, believing that they will be punished for their mistakes.

2. Lack of knowledge: Young workers are not always aware of their rights and responsibilities, as well as the procedures for reporting accidents and injuries in the workplace. They may not know who to report to or how to fill out an incident report.

Part 2:  Identifying the hazard in the picture attached

The hazard in the attached picture is the use of improper PPE (Personal Protective Equipment). The worker in the picture is using a grinder to cut metal without using any kind of eye protection. Sparks and metal shavings can fly into the eyes of the worker, causing eye damage or even blindness.    

The worker is also not wearing gloves, which exposes their hands to cuts, abrasions, or burns. The worker should wear appropriate PPE such as safety goggles, gloves, and a face shield while using a grinder to minimize the risk of injury or accidents.

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Answer:

Winds are a result of the tendency of warm air to rise and, conversely, cool air to sink. ... Because the atmosphere constantly flows, like a fluid in a container, air rushes into such low pressure areas from cooler, high-pressure ones, and the movement of the air creates wind.

Hydrogen gas is being produced at a rate that depends on the specific conditions of the reaction, such as the temperature, pressure, and concentration of reactants.

In order to determine the rate of hydrogen gas production, we would need to know these specific conditions and use them to calculate the rate using the rate law for the reaction. The rate law is an equation that relates the rate of a reaction to the concentration of the reactants and the rate constant, k.

Hence, the rate law for a reaction can be determined experimentally and is specific to the reaction. Once the rate law is known, we can plug in the specific conditions of the reaction to determine the rate of hydrogen gas production.

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Answer:

The government :) lol

Explanation:

19.2g/cm³

D = m / V

24.20g / 1.92ml = 19.2g/cm³

The mass of magnesium chloride produced is 392 g if we start with 100.g of magnesium.

The quantity of matter present in an object is determined by its mass, which is a fundamental attribute of matter. It is a scalar quantity and is denoted by the letters g or kg (kg). Weight, which is the force of gravity acting on an object and which varies depending on the gravitational field, is distinct from mass.

The reaction's chemically balanced equation is as follows:

Mg + 2HCl → MgCl₂ + H₂

This demonstrates that when one mole of magnesium (Mg) is combined with two moles of hydrochloric acid (HCl), one mole of magnesium chloride (MgCl2) and one mole of hydrogen gas (H2) are produced.

We need to know how many moles of magnesium there are in 100.0 g of magnesium in order to determine the mass of magnesium chloride produced. Magnesium has a molar mass of 24.31 g/mol, therefore

moles of Mg =  mass of Mg / molar mass of Mg

Moles of magnesium = 100.0 g / 24.31 g/mol.

Moles of Mg = 4.11 mol.

One mole of magnesium interacts to create one mole of magnesium chloride, according to the balanced equation. As a result, 4.11 moles of magnesium chloride were also created.

Magnesium chloride has a molar mass of 95.21 g/mol. Hence, the amount of magnesium chloride that is created is:

Mass of MgCl2 =  moles of MgCl2 x  molar mass of MgCl2

Mass of MgCl2= 4.11 mol x 95.21 g/mol

Mass of MgCl2 = 392 g.

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Answer:

25.60% of NaCl in the mixture

Explanation:

With the amount of AgCl produced we can now the moles of Cl⁻ = Moles of NaCl. With these moles we can now the mass of NaCl and, as total mass was 3.613g, it is possible to determine mass percent of NaCl in the mixture.

Moles NaCl:

2.268g AgCl * (1mol / 143.32g AgCl) = 0.01582 moles AgCl

Molar mass AgCl 143.32g/mol

0.01582 moles AgCl = Moles Cl⁻ = Moles NaCl

Mass NaCl (Molar mass: 58.44g/mol):

0.01582 moles NaCl * (58.44g / mol) = 0.9248g NaCl in the mixture

Mass percent:

(0.9248g NaCl / 3.613g) * 100 =

Answer:

b

Explanation:

Answer:

D. the quantity of heat that is required to raise 1 g of the sample by 1°C (or Kelvin) at a given pressure

Explanation:

Answer:

Group 6a, period 4

Explanation:

Refer to image

Answer:

S2-

Explanation:

Using the table attached, you can see that the trend shows that S has a larger atomic radius than O.

S2− has a larger radius than the neutral S atom. When an atom gains one or more electrons, forming an anion, the added electron(s) increase the shielding effect between the outermost electrons and the atomic nucleus.

Answer:

The answer is below

Explanation:

Resolution is the smallest unit of measurement that can be measured by a measuring instrument. Each point on the ruler is 0.1 cm and the difference between any two points, about 0.01 cm cam be measured. The minimum measurement (resolution) that can be measured by the ruler is 0.01 cm (two decimals), therefore it cannot measure up to three decimal places such as numbers like 2.755.

The relationship between pressure and temperature of a fixed amount of gas in a rigid container is called Charles’ Law.

According to Charles’ Law, for a given mass of gas at a constant volume, the volume of the gas varies directly with the temperature. It can be represented by the formula :V/T = constant where, V = volume of the gas T = temperature of the gas (in Kelvin)constant = proportionality constant Since pressure, volume, and temperature of the gas are interdependent, we can write:

PV/T = constant. We can use this formula to solve the problem. We know that the volume of the gas is constant. So, we can write:

P1/T1 = P2/T2 where, P1 = 3.20 atm (pressure at 300 K)T1 = 300 K (temperature at 3.20 atm)T2 = 290 K (temperature at unknown pressure)

Now, we can calculate P2 (pressure at 290 K) as:

P2 = P1 × (T2/T1) = 3.20 atm × (290 K/300 K) = 3.09 atmAnswer:3.09 atm

When the temperature of a fixed amount of gas is increased, its volume also increases. Similarly, when the temperature is decreased, the volume also decreases. This relationship between the volume of a gas and its temperature at a constant pressure is called Charles’ Law. It can be stated as:

V/T = constant, where V is the volume of the gas and T is its temperature in Kelvin. The proportionality constant in the above equation is the number of moles of the gas multiplied by the gas constant (R).

Mathematically, we can represent this relationship between pressure, volume, and temperature of a gas as: PV/T = constant.

When the volume of the gas is constant, the above equation becomes:

P1/T1 = P2/T2where P1 and T1 are the initial pressure and temperature of the gas, and P2 and T2 are the new pressure and temperature of the gas, respectively.

Using this equation, we can calculate the pressure of the gas at a new temperature, provided we know its initial pressure and temperature, and the new temperature.

Therefore, the pressure of the gas at 290 K will be 3.09 atm.

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Answer:

Explanation:

The average speed of the car can be found by using the formula

\(s = \frac{d}{t} \\ \)

d is the distance

t is the time taken

From the question we have

\(s = \frac{378}{12} = \frac{63}{2} \\ \)

We have the final answer as

Hope this helps you

Answer:

3.01 * 10 ^ 23 atoms of Pt

Explanation:

1 mole of Pt contains 6.02 * 10 ^ 23 atoms of Pt

195.084 g of Pt has  6.02 * 10 ^ 23 atoms of Pt  

97.6 g = .5 moles so  

97.6 g of Pt has 3.01 * 10 ^ 23 atoms of Pt

The 97.6 grams of platinum contains \(3.011\times 10^{23}\) atoms.

Given:

The mass of platinum = 97.6 grams

To find:

The number of platinum atoms in 97.6 grams.

Solution:

Mass of platinum = 97.6 g

Moles of platinum =\(\frac{97.6g}{195.084 g/mol}=0.500 mol\)

According to the mole concept:

1 mole = Avogadro Number = \(N_A=\) \(6.022\times 10^{23} atoms/ molecules/ions\)

The number of platinum atoms in 0.500 moles of platinum:

\(=0.500\times 6.022\times 10^{23} atoms\\\\=3.011\times 10^{23} atoms\)

The 97.6 grams of platinum contains \(3.011\times 10^{23}\) atoms.

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Answer:In the case of an electric bulb, the electrical energy is converted to light and heat. The amount of electrical energy put into a bulb = the amount of light energy (desirable form) plus the heat energy that comes out of the bulb

Explanation:

Just trust me

Answer:

A type of energy

Explanation:

Answer:

The general formula of an amide is RCONH2, where R represents an alkyl or aryl group. The first member of amide is formamide, which has the chemical formula HCONH2.

The general formula of an acid chloride is RCOCl, where R represents an alkyl or aryl group. The third member of acid chloride is propanoyl chloride, also known as propionyl chloride, which has the chemical formula CH3CH2COCl.

The first member of amide is formamide, and the third member of acid chloride is trichloroacetic acid chloride.

The acyl chloride of trichloroacetic acid is trichloroacetyl chloride. In the presence of activated charcoal, it can be created by the reaction of chlorine with acetyl chloride or acetaldehyde. Pharmaceuticals and plant protection chemicals are made using it.

It is a colorless to slightly yellow liquid that has a pungent odor. It is used in medical and laboratory settings as a disinfectant, preservative, and reagent. It is also used in some cosmetic procedures to help remove sunspots and other blemishes from the skin.

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