why finger print is the cheapest and easiest method of personal identification?​

The correct option which can help in defining this question is- M1V1 = M2V2 50 X 0.05 = 0.1 X V2 V2 = 25 ml H

Procedure for precipitation:

Procedure for Spectrophotometry:

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Answer:??????

Explanation:

Answer:

refer to below

Explanation:

- read your textbook! especially the topics that are most confusing

- as you read, make sure to take notes/make an outline. write the words from the text in your own words. In chem, the textbook explanations are usually very detailed, so putting it in your own words will help you remember and understand what you write.

- make sure you really understand the concepts. don't just memorize what you read.

- draw diagrams and structures. seeing how things are structured will help you visualize what you learn

- ask questions to your teacher. if there is anything confusing, make sure to refer to your teacher as they will hopefully be able to explain it so  it won't be confusing

These tips have helped me pass chem with an A. Hope all of this helped!

Answer:

Explanation:

Study material, ask for help, read textbook and do practice problems, get a tutor, beg your teacher for marks,

The following aqueous solutions represents good buffer systems:

A buffer is a solution used to stabilize the pH (acidity) of a liquid.

A good buffer system is generally known to contain close or equal concentrations of a weak acid and its conjugate base.

Based on the above explanation, the following represents a good buffer system as they are between their weak acid and conjugate base:

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The immediate cause for the United States' entry into World War II was the attack on Pearl Harbor by Japan on December 7, 1941.

World War II was a global war that lasted from 1939 to 1945. It involved the majority of the world's nations, including all of the great powers, organized into two opposing military alliances: the Allies and the Axis.

Prior to this attack, the United States had maintained a policy of neutrality and had provided support to the Allies in the form of aid and supplies. However, the attack on Pearl Harbor, which resulted in the deaths of over 2,400 Americans, led to a declaration of war against Japan by the United States, and ultimately to the country's involvement in the larger global conflict.

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Answer: alkyl halide

Explanation: brianlist please?

The chemical structure of the compound is shown in the image attached.

Ascertain the molecule's atomic composition and the types of bonds (covalent, ionic, etc.) that each atom forms.

The skeletal structure, which is a straightforward illustration of the molecule's framework, should be drawn first. To do this, a series of lines are drawn to symbolize the atoms' bonds.

By positioning the atoms at the ends of the bond lines, you may complete the skeleton framework.

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The mass of the rectangular piece of copper is 18,869 g (approx).In conclusion, the mass of a rectangular piece of copper with dimensions 24.4cm x 11.4 cm x 7.9 cm and a density of 8.92 g/cm³ is 18,869 g (approx.).

The given dimensions of the rectangular piece of copper are:Length = 24.4 cmWidth = 11.4 cmHeight = 7.9 cmThe formula to calculate the mass of an object is given by;

Mass = Density x Volume

Here, the density of copper is given as 8.92 g/cm³.

Therefore, the first step is to calculate the volume of the rectangular piece of copper.The formula to calculate the volume of a rectangular object is given by:

Volume = Length x Width x Height

So,Volume = 24.4 cm x 11.4 cm x 7.9 cm= 2115.432 cm³Now we will use the mass formula:

Mass = Density x Volume= 8.92 g/cm³ x 2115.432 cm³= 18,869.27824 g= 18,869 g (approx.)

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Answer:

Electron

Explanation:

Complete question is;

When the concentrations of reactant molecules are increased, the rate of reaction increases. The best explanation for this phenomenon is that as the reactant concentration increases,

A)the average kinetic energy of molecules increases.

B)the frequency of molecular collisions increases.

C)the rate constant increases.

D)the activation energy increases.

E)the order of reaction increases.

Answer:

B) The frequency of molecular collisions increases.

Explanation:

When we increase number of reactant molecules, the effective collision between the reactant molecules will form a product which also increases. As a result, the overall rate of the reaction will also increase which means the frequency of the molecular collision will also increase as well.

Thus, the correct answer is Option B

Answer:

here are what i have so far, im doing this right now

Explanation:

Plate Tectonics Lab Report

Instructions: In the Plate Tectonic lab you will investigate the interactions between continental and oceanic plates at convergent, divergent, and transform boundaries around the globe. Record your observations in the lab report below. Y

Objective(s):  

To look at interactions between continental and oceanic plates, etc.  

Hypothesis:

In this section, please include the if/then statements you developed during your lab activity for each location on the map. These statements reflect your predicted outcomes for the experiment.

Location One: Select three events that you predict will be observed. If I explore two continental plates at a convergent boundary, then I will observe:

• earthquakes  

• mountains

• volcanoes

Location Two: Select three events that you predict will be observed. If explore two continental plates at a divergent boundary, then I will observe:  

• ocean formation  

• volcanoes

• seafloor spreading

you will submit your completed report

ps; you might want to change up the objective.

A geological event is a brief, spatially diverse, dynamic and ongoing occurrence in the history of the Earth.

A geological event is a brief, spatially diverse, dynamic (diachronous), and ongoing occurrence in the history of the Earth that aids in the modification of the Earth system and the production of geological strata. The concept of event stratigraphy initially came up as a way to identify, analyse, and correlate how significant physical and biological events have affected the overall stratigraphical record.

Israel's Dead Sea basin Holocene sediments contain seismic activity. This can be considered a record of a geological event, an earthquake, that altered the strata. Geological events can occur over timescales of order of magnitude, from just a few seconds through millions of years, as well as on a variety of spatial scales, from the local to the globe.

1. Volcanoes and minor earthquakes

2. Volcanoes, earthquakes and fold mountains.

3. Earthquakes and fold mountains.

4. Magma from volcanoes is filled with nutrients that makes land fertile.

Therefore, a geological event is a brief, spatially diverse, dynamic and ongoing occurrence in the history of the Earth.

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Answer:

3.9 seconds

Explanation:

Given:

To find:

Solution:

We can use the equation,

v = u + at

where,

We know that the initial velocity is 0, so the equation becomes,

v = at

We can also use the equation,

s = ut + ½* at²

where,

We know that the distance covered is 540 m and the final velocity is 72 m/s, so we can substitute these values into the equation to solve for the time taken.

540 = 0 * t + ½ * a * t²

540 = ½ * a * t²

1080 = a * t²

\(t^2= \frac{1080}{a}\)

\(t = \sqrt{ \frac{1080}{a}}\)

We know that the acceleration is the change in velocity divided by the time taken, so we can substitute this value into the equation to solve for the time taken.

\(t = \sqrt{\frac{1080 }{ 72 m/s}}\)

\(t = \sqrt{15} s\)

t = 3.9 s

Therefore, the time taken is t = 3.9 seconds

To answer this question, we need to convert grams to moles and then use the Avogadro's number to convert moles to molecules.

The molar mass of Mg(OH)2 is 58.32 g/mol.

First, we need to find the number of moles of Mg(OH)2 in 75.0 g.

75.0 g / 58.32 g/mol = 1.287 mol

Next, we need to convert moles to molecules.

1.287 mol x 6.022 x 10^23 molecules/mol = 7.75 x 10^23 molecules

Finally, we can use the molecular formula of Mg(OH)2 to calculate the number of miles of Mg(OH)2.

1 molecule of Mg(OH)2 contains 3 atoms of oxygen (O) and 2 atoms of hydrogen (H).

So, the total number of miles of Mg(OH)2 is:

7.75 x 10^23 molecules x 2 miles/molecule = 1.55 x 10^24 miles

Therefore, there are 1.55 x 10^24 miles of magnesium hydroxide in 75.0 g of magnesium hydroxide.

The cylinder's volume is roughly 479.85 cm3 at a height of 11.76 cm and a diameter of 7.22 cm.

With no zero error, the diameter of a cylinder can be measured with vernier calipers. The Vernier scale's zero is discovered to be between 5.10 cm and 5.15 cm on the main scale. The 50 divisions on the Vernier scale are comparable to 2.45 cm.

V = πr²h

where r is the cylinder's radius, h is its height, and is the mathematical constant pi (approximately equal to 3.14159).

We must first determine the cylinder's radius in order to compute the volume of the cylinder with a height of 11.76 cm and a diameter of 7.22 cm:

r = d/2 = 7.22 cm / 2 = 3.61 cm

Now that the parameters have been entered, we can compute the cylinder's volume:

V = π(3.61 cm)²(11.76 cm)

V = 479.85 cm³

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This problem is providing information about the molar mass of octane, which is 114.26 g/mol and the mass of hydrogen that is in there, 18.17 g, it means we conclude that the molecular formula is C₈H₁₈ according to the following:

In chemistry, we define molecular formulas as those containing the types and number of atoms a compound has, according to the elements across the periodic table and the subscripts it has, standing for the number of each atom in the formula.

In this case, we note that 18.17 g out of 114.26 g in one mole of octane is related to hydrogen, which means that the mass of carbon is 96.09 g in one mole of octane. Next, we divide the mass of each atom by the corresponding atomic mass in order to calculate the subscript in the formula:

\(H:\frac{18.17}{1.01}=18\\\\C:\frac{96.09}{12.01} =8\)

Therefore, the resulting formula is C₈H₁₈

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Answer:

Which statement best describes this kind of reproduction? A. Each parent passed all of its genes to every offspring. B. Only one parent is required to produce offspring. C. Each parent passes half of its genes to every offspring. D. All the offspring of a set of parents have identical genes.​

Explanation:

This will help you through this.

Answer:

I'm not an expert at this, but I assume its mercury.

Answer:

false?

Explanation:

The volume (in mL) of 0.242 M NaOH solution needed for the titration reaction is 39.44 mL

CH₃CH₂COOH + NaOH —> CH₃CH₂COONa + H₂O

From the balanced equation above,

MaVa / MbVb = nA / nB

(0.204 × 46.79) / (0.242 × Vb) = 1

Cross multiply

0.242 × Vb = 0.204 × 46.79

Divide both side by 0.242

Vb = (0.204 × 46.79) / 0.242

Vb = 39.44 mL

Thus, the volume of NaOH needed for the reaction is 39.44 mL

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The chemical elements involved are; hydrogen, fluorine, boron and lithium

There are two hydrogen atoms, five fluorine atoms, one boron atom and one lithium atom.

Chemical compounds are represented symbolically by chemical formulas, which reveal the types and amounts of atoms that make up the compound. It is a succinct approach to explain a substance's makeup.

The components of a compound are identified in a chemical formula by their corresponding chemical symbols, which are typically derived from their English or Latin names. The number of atoms of each element in a single compound molecule is indicated by the subscripts that follow each element.

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To calculate the pressure inside the canister, we can use the ideal gas law equation:

PV = nRT

Therefore, the pressure inside the canister at a campfire temperature of 1500 °C is approximately 136.39 atmospheres.

To calculate the pressure inside the canister, we can use the ideal gas law equation:

PV = nRT

Where:

P = pressure (in atmospheres)

V = volume (in liters)

n = number of moles of gas

R = ideal gas constant (0.0821 L·atm/(mol·K))

T = temperature (in Kelvin)

First, we need to convert the volume from milliliters to liters:

1500 milliliters = 1500/1000 = 1.5 liters

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

1500 °C + 273.15 = 1773.15 K

Now, we can substitute the values into the ideal gas law equation:

P * 1.5 = 3 * 0.0821 * 1773.15

Simplifying the equation:

P = (3 * 0.0821 * 1773.15) / 1.5

Calculating the value:

P ≈ 136.39 atm

Therefore, the pressure inside the canister at a campfire temperature of 1500 °C is approximately 136.39 atmospheres.

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Answer:

how to get a now life

Explanation:

heheh

1. Examples of solids, liquids, and gases found in a home

Solids: books, furniture, toys

Liquids: water, juice, shampoo

Gases: air, natural gas, propane

2. The human body contains solids, liquids, and gases. Solids include bones, muscles, and organs. Liquids include blood, saliva, and urine. Gases include air in the lungs and dissolved gases in the bloodstream. The body is mostly made up of liquids, as they make up a large percentage of its overall volume.

3. If you needed to remove the water from a sample of blood to study the solids that remained, you could use a process such as evaporation or freeze-drying. Evaporation involves heating the sample to allow the water to evaporate, leaving behind the solids. Freeze-drying involves freezing the sample and then removing the water under vacuum, leaving behind a dry solid.

4. Some metals that could be found within the human body include iron, zinc, and copper. These metals are commonly found in foods such as meat, seafood, nuts, and whole grains. Other metals such as calcium, magnesium, and potassium are also important for the body and are found in a variety of foods.

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Answer:

Phosphorus

Explanation:

This should be the correct answer

If not then im sorry :)

Answer:

Some natural resources like sunlight and wind are found everywhere, but other natural resources are unevenly distributed. Resources like oil, coal, and natural gas are only found where conditions were favorable to grow and preserve large quantities of animal or plant matter.

Explanation:

Answer: NH₃ (aq) + H⁺ (aq) ⇒ NH₄⁺ (aq)

Explanation:

Step 1: Write the balanced equation and include the state, in this case aqueous (aq) as stated in the problem.

NH₃ (aq) + HCl (aq) ⇒ NH₄Cl (aq)

Step 2: Break apart strong electrolytes to form the complete ionic equation.

Ammonia is a weak base so it will not completely break apart in solution. HCl is a strong acid so it will break apart in solution. Ammonium chloride is an ionic compound, so it will break apart too.

NH₃ (aq) + H⁺ (aq) + Cl⁻ (aq) ⇒ NH₄⁺ + Cl⁻ (aq)

Step 3: Remove the spectator ions that are found on both sides of the equation. Cl- (aq) is on both sides of the equation, so it is a spectator ion and can be crossed out.

NH₃ (aq) + H⁺ (aq) + Cl⁻ (aq) ⇒ NH₄⁺ (aq) + Cl⁻ (aq)

NH₃ (aq) + H⁺ (aq) ⇒ NH₄⁺ (aq)

Answer:

D)Particle Arrangement

Explanation:

When solid carbon dioxide CO₂ will evaporate in gaseous carbon dioxide CO₂ the particles arrangement will change from ordered in solid state to completely disordered in gaseous state.

Bond type, gram formula mass and molecular polarity are not changed in the described physical transformation.