Find the average atomic mass of smithium ?

To separate the mixture of water, salt, iron filings, sand, and Styrofoam, you can follow the following steps:

By following these steps, you can separate the different components of the mixture effectively.

Answer:

n=m/M

n=48/32

n=1.5 moles

the correct answer is B

The work must be done on the electron to move it to the negative plate if it is initially positioned 2.78 mm from the positive plate is 1.69 × 10⁻¹⁹ J.

To determine the work required to move the electron to the negative plate if it is initially positioned 2.78 mm from the positive plate, we must first determine the potential difference between the two plates. The potential difference between the two plates can be calculated as follows: V = Ed = (σd/ε₀) x d Where, V = Potential difference E = Electric fieldσ = Charge density d = Distanceε₀ = Permittivity of free space Substituting the given values,

we get, V = (1.50 × 10⁻⁹ C/m² x 2.78 × 10⁻³ m)/8.85 × 10⁻¹² C²/N m²V = 4.78 × 10⁶ V The potential difference between the plates is 4.78 × 10⁶ V. Now, the work done is given by, W = q V Where, W = Work done q = Charge V = Potential difference q = -1.60 × 10⁻¹⁹ C (Since the charge of an electron is negative)Substituting the given values, we get, W = -1.60 × 10⁻¹⁹ C × 4.78 × 10⁶ VW = 1.69 × 10⁻¹⁹ J

Therefore, the work must be done on the electron to move it to the negative plate if it is initially positioned 2.78 mm from the positive plate is 1.69 × 10⁻¹⁹ J.

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When a seismic wave passes from the ground into a body of water the waves energy would be absorbed. The correct answer is Option A. Seismic waves move more slowly through a liquid than a solid.

Seismic waves are waves that travel below or over Earth. Explosions, volcanoes and landslides are the reason for the movements of the earth tectonic plates. Seismic waves can be identified by a number of characteristics including the speed the waves travel, the direction that the waves move particles as they pass by, where and where they don't propagate

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Answer:

I dont even know what that even means

I hope you will find the answer

Answer:

Explanation:

Answer:

B

Explanation:

Answer:

The balanced equation is: 2AgNO₃ + MgCl₂ ------> 2AgCl + Mg(NO₃)₂

Explanation:

The law of conservation of mass states that in a normal chemical reaction, matter is neither created nor destroyed.

According to the law of conservation of mass, therefore, when a chemical reaction occurs, the mass of the products should be equal to the mass of the reactants. This implies that the amount of the atoms in each element in the chemical reaction remains the same before and after the reaction. A balanced chemical equation therefore,  is one that shows that the number of the atoms involved in the reactants side is equal to the number of atoms in the products side.

Considering the given reaction:

2AgNO₃ + MgCl₂ ------> 2AgCl + Mg(NO₃)₂

The amount in moles of each atom in the reaction is as follows;

Ag = 2 moles of atom on each side

N = 2 moles of atoms on each side

O = 6 moles of atoms on each side

Mg = 1 mole of atoms on each side

Cl = 2 moles of atoms on each side

Therefore, the above chemical equation is balanced.

Answer:

The equation is already balanced.

Explanation:

A chemical reaction accompanied by a release of energy is called exothermic reaction. A chemical reaction involves breaking of chemical bonds and formation of new ones. This process involves either absorption or release of energy.

An exothermic reaction is one in which energy is released in the form of heat, light, or sound. In other words, the energy of the reactants is higher than the energy of the products, resulting in a release of energy to the surroundings. Examples of exothermic reactions include combustion reactions, such as burning of fuels, where energy is released as heat and light. Other examples include the reaction of acids with bases, where energy is released as heat and water. Exothermic reactions are used in many industrial processes, such as in the production of fertilizers, plastics, and pharmaceuticals. They are also used in everyday life, such as in the combustion of fuels for heating and cooking.

On the other hand, an endothermic reaction is one in which energy is absorbed from the surroundings. The energy of the products is higher than the energy of the reactants, resulting in a net absorption of energy. Examples of endothermic reactions include melting of ice, where energy is absorbed from the surroundings, and photosynthesis, where energy from the sun is absorbed by plants.

A catalyzed reaction is one in which a catalyst is used to speed up the rate of the reaction, but it does not affect the thermodynamics of the reaction and whether it is exothermic or endothermic.

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Each ion has a single charge, one positive and one negative, so we need only one ion of each to balance the overall charge. When writing the ionic formula, we follow two additional conventions: (1) write the formula for the cation first and the formula for the anion next, but (2) do not write the charges on the ions.

The canister contains approximately 0.0331 moles of gas.

We can use the Ideal Gas Law to solve this problem:

PV = nRT

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

First, we need to convert the pressure from atm to Pa and the volume from L to \(m^3\)

P = 0.750 atm x 101325 Pa/atm = 75993.75 Pa

V = 0.859 L x (1 \(m^3\)/1000 L) = 0.000859 \(m^3\)

Next, we need to convert the temperature from Celsius to Kelvin:

T = 176°C + 273.15 = 449.15 K

Now we can substitute these values into the Ideal Gas Law:

n = PV/RT

= (75993.75 Pa)(0.000859\(m^3\))/(8.3145 J/(mol·K))(449.15 K)

n ≈ 0.0331 mol

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Answer:

Answer:

1. Foods that have changes that are chemically introduced.

2. corn soybeans apples etc

3. sot they last longer or look better

4. new dna is placed in them and their seeds

5. they are not as good for humans

Explanation:

Answer:

The circulatory system brings blood through the kidneys where nitrogenous wastes can be filtered. The urinary system helps the circulatory system by maintaining salt balance in the body and adjusting blood pressure by getting rid of or holding on to more water.

Explanation:

Answer: The concentration of the acid Vincent produced is 0.083 M.

Explanation:

Given: Mass = 6.5 g

Volume = 600.0 mL (1 mL = 0.001 L) = 0.6 L

Moles is the mass of substance divided by its molar mass. So, moles of bromic acid (molar mass = 128.91 g/mol) are calculated as follows.

\(Moles = \frac{mass}{molar mass}\\= \frac{6.5 g}{128.91 g/mol}\\= 0.05 mol\)

Molarity is the number of moles of a substance present in liter of a solution.

Therefore, molarity (concentration) of the given solution is calculated as follows.

\(Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.05 mol}{0.6 L}\\= 0.083 M\)

Thus, we can conclude that the concentration of the acid Vincent produced is 0.083 M.

The answer of the calculations above in scientific notation are a=8.3 ×10³, b= 3.9 × 10^¹um, c= 1.4 × 10³gmol, d= 5.6× 10²km

In calculation of various expressions, the results can be expressed in a scientific notation which is a way to compress cumbersome figures.

4.2 × 104 = 436.8

7.9 × 10³ = 7900

436.8 + 7900 = 8,336.8

The scientific notation= 8.3 ×10³kg

5.23 x 106 um = 554.38um

554.38 × 7.1 = 3,936.1

3,936.1 × 10^-²

3.9 × 10³ × 10^-²= 3.9 × 10^¹um

The scientific notation= 3.9 × 10^¹um

5.44 x 107 g = 582.08g

8.1 x 104 mol = 842.4 mol

582.08g+ 842.4 mol = 1,424.48

The scientific notation = 1.4 × 10³gmol

8.40 x 105 km = 882km

3.1 × 105 = 325.5km

882km - 325.5km = 556.5

The scientific notation = 5.6× 10²km

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Factors that increases reaction rate such as increase in concentration or pressure will reduce reaction time whereas factors that decrease reaction rate such as inhibitors will increase reaction time.

Factors that affect reaction rate are those factors which increase or decrease the rate of chemical reaction.

The factors that affect reaction rate include:

Any factor that increases reaction rate such as increase in concentration or pressure will reduce reaction time whereas factors that decrease reaction rate such as inhibitors will increase reaction time.

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Answer:

Critical thinking initiates the act of hypothesis.

Critital thinking initiates the hypothesis. By thinking you will come across a question you want to answer. In the conculsion crititcal thinking is used again to validate the hypothesis.

1.25 x 1023 atoms of magnesium contains 0.28. moles of magnesium.

A mole of any element contains Avogadro's number of that element's atoms. To find the number of moles of magnesium in 1.25 x 1023 atoms of magnesium, simply divide by Avogadro's number:

1.25 x

\( {10}^{23} \)

magnesium atoms / 6.022 x

\( {10}^{23} \)

atoms/mol = 0.208 moles magnesium

As a result, 1.25 x

\( {10}^{23} \)

atoms of magnesium contain 0.208 moles of magnesium.

The number of particles (atoms, molecules, and ions) in one mole of a substance is represented by Avogadro's number, which is a fundamental constant in chemistry. It has a value of about 6.022 x

\( {10}^{23} \)

particles per mole. The number was named after Italian scientist Amedeo Avogadro, who first proposed the concept in the early 19th century as a way to explain the relationship between the amount of a substance and its constituent particles.

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Answer:

the volume of the sound will quarter

Explanation:

As you move far away from the source, the loudness of sound decreases. This is because as the distance from the source increases, the area it covers also increases thereby spreading the energy over a great area leading to lesser loudness and intensity.

As a result of this, sound intensity follows an inverse square law:

I ∝ 1/d²; where I is the intensity and d is the distance from source.

Therefore If a speaker is moved from 2 feet away to 4 feet away (increment of 2 feet), the volume of the sound would quarter (1/2² = 1/4)

Answer:

In chemistry, yield, also referred to as reaction yield, is a measure of the quantity of moles of a product formed in relation to the reactant consumed, obtained in a chemical reaction, usually expressed as a percentage

The actual yield of the reaction is the calculated amount of product. The correct option is C.

Yield is the final product that was produced after some labor. It might be a reaction, or we might grow something, and the result would be agricultural produce. In chemistry, the yield is related to the product that came after a chemical reaction.

In chemistry, there are two types of yields:

The theoretical yield is the yield that we assumed, and the actual yield is the yield that actually comes after the reaction.

Thus, the correct option is C. The calculated amount of product.

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When 0.300 mol of CH4 burns, it releases heat that is absorbed by 6.00 kg of water, initially at 20.0°C. The final temperature of the water is 49.4°C.

During the combustion of CH4, heat is released according to the balanced chemical equation: CH4 + 2O2 → CO2 + 2H2O. The amount of heat released can be calculated using the enthalpy of combustion of CH4, which is -890.3 kJ/mol. Therefore, the heat released by 0.300 mol of CH4 is (-890.3 kJ/mol) x (0.300 mol) = -267.09 kJ.

The heat released is absorbed by the water, which can be calculated using the formula Q = mCΔT, where Q is the heat absorbed, m is the mass of water, C is the specific heat capacity of water, and ΔT is the change in temperature.

Rearranging this formula to solve for ΔT, we get ΔT = Q / (mC). Substituting the given values, we get ΔT = (-267.09 kJ) / (6.00 kg x 4.184 J/g°C) = -10.15°C. Therefore, the final temperature of the water is 20.0°C - 10.15°C = 9.85°C. Since the initial temperature was 20.0°C, the final temperature is 20.0°C + 29.4°C = 49.4°C.

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we can conclude that the scale is precise but not accurate. The correct option is d.This means that the scale consistently gives the same measurements, but they are not accurate or close to the true value.

To understand whether the scale is precise, accurate, both, or neither, we need to define these terms. Precision refers to the consistency or reproducibility of measurements, while accuracy refers to how close the measured value is to the true or accepted value. In this case, the true value is 1.000g, and the measurements captured are 0.843 g, 0.842 g, and 0.843 g.Looking at these measurements, we can see that they are not accurate since none of them are close to 1.000g. However, we can also see that they are precise since they are all very similar to each other, with a difference of only 0.001g between the highest and lowest measurement.
Therefore, To improve accuracy, the scale may need to be recalibrated or replaced.

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complete question: Testing precision and accuracy of scale, weigh block exactly 1.000g. these are measurements captured:

a. 0.843 g

b. 0.842 g

c. 0.843 g

d. Is the scale precise, accurate, both, or neither?

the answer is D. The rain cycle says that Evaporation turns water into gas

Answer:

D is your Answer just did the  quiz

( date on bottom when I did the quiz)

Explanation:

3 - 24 - 2021

Answer:

Explanation:

Here, we want to get how the final digit in a measurement is obtained

Mathematically, the final digit can be obtained by estimation

Hence, we say that the value is uncertain

The final digit is obtained by a mark or between the last mark and the next mark in a measurement

Thus, we call this value uncertain since it is estimated

Answer:

For Fe, it's 55.845 g/mol. So 7.85 / 55.845 = 0.141 mol.

The sample of pure carbon would contain approximately 2.135 x 10²⁴ carbon atoms.

The majority of carbon atoms—98.93%—have masses of 12 atomic mass units. A mass of 13.00 atomic mass units is present in 1.07% of the carbon atoms. 14.) Identify one distinction between the nuclei of carbon-12 and carbon-13 atoms in terms of the subatomic particles that can be discovered there.

First, using the atomic mass of carbon, we must determine how many moles of carbon are present in the sample:

1 mole of carbon atoms = 12.01 g of carbon atoms (atomic mass of carbon)

42.552 g of carbon atoms / 12.01 g/mol = 3.545 moles of carbon atoms

Using Avogadro's number, we can then determine how many carbon atoms are present in the sample:

Number of carbon atoms = 3.545 moles of carbon atoms x 6.022 x 10²³ atoms/mole

Number of carbon atoms = 2.135 x 10²⁴ atoms

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When two forms of a trait (such as dominant and recessive alleles) are present in an individual's genetic makeup, it is called heterozygous or hybrid.

This means that the individual has inherited different versions of the gene from each parent. In contrast, when an individual has two identical forms of a trait, it is called homozygous.

"Heterozygous" refers to an organism that has two different alleles, or versions of a gene, at a particular genetic locus. One allele is inherited from one parent, while the other allele is inherited from the other parent. For example, if an individual inherits one allele for blue eyes from one parent and one allele for brown eyes from the other parent, they are heterozygous for the eye color gene.

In contrast, an individual who inherits two identical alleles (either two blue or two brown) is homozygous for that gene. Heterozygous individuals may exhibit a dominant trait if one allele is dominant over the other, or a recessive trait if both alleles are recessive.

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A single bromine atom is added to a molecule during the halogenation process known as monobromination.

Thus, In this chemical reaction, a bromine molecule works as an electrophile and targets the portion of the target molecule that is rich in electrons. A hydrogen atom gets swapped out for a bromine atom as a result of this reaction, creating a new molecule.

One or more bromine atoms are added to a molecule during a bromination reaction, a type of halogenation reaction.

Free radical bromination, electrophilic bromination, and nucleophilic bromination are some of the numerous ways that this reaction can happen. A bromine molecule is broken up into two free radicals during free radical bromination, which causes the molecule to be attacked and have an additional bromine atom added.

Thus, A single bromine atom is added to a molecule during the halogenation process known as monobromination.

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