Please help me I need these answers

Taking into account the definition of density, the volume of the quarter is 0.5952 mL.

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space and it is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

In this case, you know that:

Replacing in the definition of density:

10.5 g/mL= 6.25 g÷ volume

Solving:

10.5 g/mL× volume= 6.25 g

volume= 6.25 g÷ 10.5 g/mL

volume= 0.5952 mL

In summary, the volume of the quarter is 0.5952 mL.

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The frequency of the wave assuming it is light having compete distance as 4.17×10^7 m is 1.44×10^15 Hz

Wavelength:- It is defined as the distance between the two Consecutive Crest or trough. OR distance travelled by the wave to Complete one Complete Cycle.

The distance for completing two cycle is 4.17×10^7 m

so 2λ=4.17×10^7m

λ=2.085×10^-7m

Also f=c/λ

f=3×10^8/2.085×10^-7

f=1.44×10^15 Hz

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When we convert 120 meter to feet we obtain 393.6 feet.

Unit conversions is very important in science. It is important that we are able to express a value in different units as this is able to ease the process of making calculations.

We know that;

1 meter = 3.28 foot

120 meter = 120 meter * 3.28 foot/1 meter

= 393.6 feet

Thus, when we convert 120 meter to feet we obtain 393.6 feet.

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Ions are simply referred to as electrically charged atoms. Ions are formed when atoms lose or gain electrons to become positively or negatively charged.

Positively charged atoms are called cations (+) while negatively charged atoms are called anions (-).

According to this question, ions are electrically charged that can be formed when a metal reacts with a non-metal.

Metals like calcium, pottasium etc. lose electrons to form positive ions or cations while non-metals such as nitrogen, oxygen etc gain electrons to form negative ions or anions.

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The mass of sulfur in a sample of CaSO4 with a mass of 65.8 g is 15.50g.

According to this question, a 10.4 g sample of CaSO4 is found to contain 3.06 g of Ca and 4.89 g of O.

This means that the mass of sulfur in the 10.4g of CaSO4 is 10.4g - (3.06g + 4.89g) = 10.4g - 7.95g = 2.45g

Next, we calculate the percent ratio of each element in the compound; CaSO4.

According to this question, a sample of CaSO4 with a mass of 65.8 g is given. The mass of each element in this compound is as follows:

Therefore, the mass of sulfur in a sample of CaSO4 with a mass of 65.8 g is 15.50g.

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Answer:

The conversion factor is 0.001; so 1 cubic decimeter = 0.001 cubic meters. In other words, the value in dm3 divide by 1000 to get a value in m3.

Explanation:

The most important safety measure to follow when using an acid in a classroom laboratory is wearing gloves, wear face shield and protective clothing etc

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To see how the concentration of the acid would affect the rate at which the steel corroded

In the given question it is said that a chemist is studying the effect of acid rain on the steel in bridges and because of concentration of the acid it would affect the rate at which the steel corroded and in the corrosion of steel which is present in bridges is the electrochemical process that require the simultaneous presence of moisture and oxygen and acid rain is a form of precipitation with acidic component such as sulphuric acid or nitric acid that fall to the ground from the atmosphere in wet or dry form. and in the steel bridge when the acid rain is fall concentration of acid which is present on acid rain will effect the bridge and affect the rate at which the steel corroded

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The correct answer is option b) Both atoms have Zeff of 1; therefore, Atom D is above Atom E in the same column because of the additional energy level.

The term "Zeff" refers to the effective nuclear charge, which is equal to the atomic number (number of protons) less the core electrons (all the electrons less the valence electrons).

Zeff = no. of protons -  no. of core electrons

Now, each circle in the image indicates a distinct energy level, with rising energy as one moves away from the nucleus. Since atom D has fewer energy levels than atom E, hence, it is placed above atom E in the periodic table.

Furthermore, according to the trends of the periodic table, atoms with the same number of valence electrons will be in the same column. Since atoms D and E both have a single valence electron. Hence, they are in the same column and have the same Zeff of 1.

Therefore, both atoms have Zeff values of 1, and Atom D is positioned above Atom E in the same column due to the additional energy level in atom E.

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The mass of water is 1.89g

Mass is a measure of the amount of matter that an object contains

Here given data is 1.23 g of butane reacts with excess oxygen and the reaction is

C₄H₁₀ + 13/2 O₂ →4CO₂ + 5H₂O

Mole of butane = 1.23/58.12g/mol⁻¹

Mole of butane = 0.021mol

We assume complete combustion, and know that each mole of butane gives off 5 mol of water upon combustion.

We know the molar quantity of butane then

5×0.021×18.01 = 1.89g

Mass of water is 1.89g

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Answer:

Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. The fission process often produces gamma photons, and releases a very large amount of energy even by the energetic standards of radioactive decay

Answer:

true I believe

Explanation:

Intermolecular force is the force of attraction that holds the particles in the atom together. The force referred to in the question is the force that binds the various elements together when they come together.

The intermolecular forces presented in the answer options in order of strength to weakness are ion-dipole hydrogen bonds dipole-dipole and van der Waals forces. The dipole-dipole interaction is the strongest intermolecular attraction. These are the weakest intermolecular forces and exist between all types of molecules, whether ionic or covalent, polar or non-polar.

Solids usually have the strongest intermolecular forces compared to liquids and gases. In solids, they are incompressible and dense because the particles are close together. The weakest intermolecular force is the London dispersion force. London Dispersion Force The London dispersion force is also known as the induced dipole induced dipole because it is a temporary attractive force that generates a temporary dipole. London dispersion exists in nonpolar monatomic gases.

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Answer:

nonpolar substance < polar substance < ionic substance

Explanation:

Answer key

Considering the ideal gas law, the mass of ammonia is 5.321 grams.

An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of gases:

P×V = n×R×T

In this case, you know:

Replacing in the definion of ideal gas law:

2.55 arm× 3 L = n×0.082 [tex]\frac{atmL}{molK}[/tex]× 298 K

Solving:

n= (2.55 arm× 3 L)÷ (0.082 [tex]\frac{atmL}{molK}[/tex]× 298 K)

n= 0.313 moles

Being the molar mass of ammonia 17 g/mole, the mass can be calculated as:

mass of ammonia= 0.313 moles× 17 g/mole

Solving:

mass ammonia= 5.321 g

Finally, the mass of ammonia is 5.321 grams.

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The total kinetic energy of the gas sample is 3.3 KJ

This is the energy possessed by an object in motion. Mathematically, it can be expressed as:

KE = ½mv²

Where

Mass = mole × molar mass

Mass of fluorine gas = 1 × 38

Mass of fluorine gas = 38 g

KE = ½mv²

KE = ½ × 0.038 × 415²

KE = 3272.275 J

Divide by 1000 to express in kilojoule

KE = 3272.275 / 1000

KE = 3.3 KJ

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Taking into account the definition of density, the density of the metal is 1.097 g/mL.

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.

The expression for the calculation of density is:

density= 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.

In this case, you know that:

Replacing in the definition of density:

density= 4.5 g÷ 4.1 mL

Solving:

density= 1.097 g/mL

In summary, the density of the metal is 1.097 g/mL.

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0.072251

Explanation:

The Sig Figs would be 5 (0.072251)

In Decimals 6 (0.072251)

Scientific Notation 7.2251 × 10-2

E-Notation 7.2251e-2

The hydrogen ions build up in high concentration in the lumen of the thylakoid. They pass through an enzyme called ATP synthase, and their movement provides the energy needed to add a third phosphate to ADP (adenosine diphosphate) to form ATP (adenosine triphosphate).

might be a b

Answer:Other dude is right I just took the quiz.

Its B

Explanation

Answer:

statement C is the correct answer

Answer:

3.

Explanation:

Sodium chlorate has the formula NaClO3. We know this because sodium is Na, chlorine is Cl, and because of naming rules. When a compound ends in -ate, it has 3 oxygen atoms. This is the naming rule list with chlorine as the example:

perchlorate: 4 O atoms

chlorate: 3 O atoms

chlorite: 2 O atoms

hypochlorite: 1 O atom

Answer:

1 LITHIUM= 6.022140857×1023 atoms

0.50 LITHIUM =  3.01 × 102^3

ADD THEM TOGETHER AND YOU GET YOUR ANSWER.

Explanation:

Answer:

ddddddfrvtrnsyjemn

Explanation:

dddddddddddd

look at the screenshot

Answer: Ture

Explanation: A small standard deviation means that the data is more clustered around the mean (More reliable).

Answer: 20.179 grams

I had to do a project on this recently, so here is your answer!

Hope this is helpful!

Answer:

2.894 x 10²⁴ atoms Ne

Explanation:

To find the amount of neon atoms, you need to (1) convert grams to moles (using the atomic mass) and then (2) convert moles to atoms (using Avogadro's Number). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator of the ratios in this case). The final answer should have 4 sig figs like the given value (100.0 = 4 sig figs).

Atomic Mass (Ne): 20.180 g/mol

Avogadro's Number:

6.022 x 10²³ atoms = 1 mole

 100.0 g Ne             1 mole             6.022 x 10²³ atoms
--------------------  x  -----------------  x  -------------------------------  =  2.894 x 10²⁴ atoms
                               20.180 g                    1 mole

C2H6O is ethanol which is easily dissociate in aqueous solution because ethanol is easily soluble in water.

Aqueous solution is defined as a solution in which the solvent is water.

Example of aqueous solution are cola, salt water, base solution, salt solution etc., are some of the example of aqueous solution.

Non aqueous solution is defined as a solution obtained by dissolving solute in any liquid other than water.

Example of non aqueous solutions are ethene in dichloromethane and Sulphur  in carbon disulphide etc. are some of the example of  non aqueous solution.

Thus, C2H6O is ethanol which is easily dissociate in aqueous solution because ethanol is easily soluble in water.

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Explanation:

Refer to Activity 2 in Lab 3A to answer the question below

Two amino acids are shown below in the process of forming a peptide bond (labeled). The hydroxyl (-OH circled in red) is being removed from the carboxyl group of the first amino acid. A hydrogen

atom (-H circled in red) is being removed from the amine group from the second amino acid. The removed -OH and -H will form water (H20)

Question

What chemical reaction takes place when water is removed to form a bond (as is being shown below)?

Answer: F,C,NA

Explanation:

bc it is