why do we say the partials in a rock lying on the ground have kinetic energy and potential energy

The mass of hydrogen that is needed to produce 5.0 g of tungsten is 0.0273 grams.

Tungsten is a chemical element that is used with steel to make the steel strong.

The equation:

WO₃ + 3H₂ --> 3H₂O + W

Given, that the mass is 5.0 g of tungsten

The molar mass of tungsten is 183.84 g/mol

Moles = mass / molar mass

5.0 / 183.84 = 0.0271 moles

Then, the Mass of hydrogen

The molar mass of hydrogen is 1.00784

Moles of tungsten are 0.0271 moles

molar mass x moles

1.00784 x 0.0271 moles

0.0273

Thus, the mass of hydrogen needed is 0.0273 grams.

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Answer:

This is an example of a random error because the timer is adding an extra second onto each runner's time, which is not an accurate representation of their true time. This error is not systematic, meaning that it does not affect all runners in the same way or add the same amount of time onto their times.

Explanation:

Give me brainliest if that helped :)

The scientific method is an experimentation technique used to investigate data and answer questions. All sciences, including chemistry, physics, geology, and psychology, follow the scientific method. These scientists ask various questions and conduct different tests. They do, however, apply the same fundamental technique to arrive at logical and evidence-based conclusions. Scientists change the scientific method when direct experimentation is not possible. Understanding the phases of the scientific process can assist you in focusing your scientific inquiry and working through your observations and data to get the best possible response.

The scientific method consists of seven phases.

1. Pose a query. The scientific approach begins with posing a question that you want answered.

2. Conduct research.

3. Create your theory.

4. Experiment to put your hypothesis to the test.

5. Make a note of it.

6. Analyze the findings and reach a conclusion.

7. Display your results.

Explanation:

 It drowns out some of the more delicate notes. It changes the flavour balance.

Answer:

Around 31536000 seconds (depending on which days you want to exclude)

Explanation:

60 seconds in 1 minute

60 minutes in an hour

24 hours in 1 day

365 days in 1 year

60 * 60 * 24 * 365

Answer:

molecules

Explanation:

hope i help :))

From the table shown in the question;

Volume of aluminum bar = 15.52 cm^3

Volume of the rod =  23.8 cm^3

The volume of the iron bolt can only be obtained by the displacement method.

The term volume refers to the space that is occupied by an object. We know that the volume of an object could be obtained in different ways depending on the nature of the object. If the object is a solid, we could look at the dimensions of the solid or we could use the dimensions of the solid. The actual method that we finally use is peculiar to the object whose volume we intend to measure.

In order to obtain the volume of the aluminum bar;

Volume = length * width * height

Volume = 9.7 * 1.6 * 1.0 = 15.52 cm^3

In order to obtain the volume of the rod;

Volume = Area * length

Volume = 3.14 * (1.7)^2/4 * 10.5

Volume = 23.8 cm^3

We can not obtain the volume of the iron bolt by this method because it is an irregular solid hence we have to use the displacement method.

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The mass of the hydrogen peroxide is 238 g.

Hydrogen peroxide at room temperature stays in liquid form. It has a bitter taste and is colorless. It is an important regent used in pharmaceutical and other industries. It also has medical use. It can be used as an antiseptic.

The number of miles in the hydrogen peroxide is n.

n = 7 mol

The molar mass of hydrogen peroxide is,

The molar mass of hydrogen peroxide = Molar mass of hydrogen + Molar mass of oxygen

= 2 × 1 + 2× 16

= 34 g/mole

The molar mass of hydrogen peroxide is 34 g/mole.

The mass of the hydrogen peroxide is,

[tex]Number \: of \: moles = \frac{ Mass }{ Molar \: mass}[/tex]

[tex]n = \frac{m}{M} [/tex]

m = n × M

m = 7 × 34

m = 238 g.

Therefore, the mass of the hydrogen peroxide is 238 g.

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Answer:

metallic compounds are good conductors of electricity.

metallic compounds have high boiling points

Given,

Specific heat capacity of lead = 0.128 J/g

Specific heat capacity of magnesium= 1.024 J/g

Molar heat capacity is the amount of heat needed to raise the temperature of 1 mole of a substance by 1 unit.

So,

For calculating molar heat capacity we need to multiply the specific heat capacities of the metals with their atomic masses.

Atomic mass of lead (Pb) = 207

Atomic mass of magnesium (Mg) = 24

∴ Molar heat capacity = specific heat capacity x atomic mass

Molar heat capacity of Pb=0.128 x 207 = 26.5 J

Molar heat capacity of magnesium (Mg) = 1.024 x 24 = 24.5

Hence , molar heat capacities of lead and magnesium are 26.5 and 25.5 Joules respectively.

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Molar heat capacities of lead and magnesium is 26.49 and 24.5 Joules, respectively.

Given,

Lead has a specific heat capacity of 0.128 J/g.

Magnesium has a specific heat capacity of 1.024 J/g.

The quantity of heat required to increase the temperature of 1 mole of a substance by 1 unit is known as its molar heat capacity.

So, We must multiply the specific heat capacities of the metals by their atomic masses in order to determine their molar heat capacities.

Lead (Pb) has an atomic mass of 207.

Magnesium (Mg) has an atomic mass of 24.

Specific heat capacity multiplied by atomic mass gives the molar heat capacity.

Pb has a 26.5 J molar heat capacity (0.128 x 207).

Magnesium's (Mg) molar heat capacity is equal to 1.024 x 24.

Thus, lead and magnesium have molar heat capacities of 26.49 and 24.5 Joules, respectively.

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The pH of a monoprotic weak acid which is 80 percent ionised with a strentght of 0.05m is 1.39

What is pH ?

A scale called pH , which traditionally stood for "potential of hydrogen" (or "power of hydrogen"), is used in chemistry to describe how acidic or basic an aqueous solution is. Lower pH values are recorded for acidic solutions (solutions with higher H+ ion concentrations) than for basic or alkaline solutions. The concentration of hydrogen ions in the solution is shown inversely by the pH scale, which is logarithmic.

pH + pOH = 14

[H + ]=0.05×0.80=0.04M

Now, Here, pH=−log[H + ]=−log0.04=1.39

The pH of a monoprotic weak acid which is 80 percent ionised with a strentght of 0.05m is 1.39

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The number of neutrons present in the nucleus of an average atom in any given element is best estimated by subtracting the number of protons from the mass number.

All atoms contain protons, neutrons and electrons, although the amount differs for each atom. Neutrons are located in the nucleus of each atom. They were first discovered by James Chadwick. They are also neutral and have no charge.

Apart from neutrons, positively charged protons are present in the nucleus. The number of protons is equal to the atomic number, usually denoted with the letter Z.

The mass number or atomic mass is the total mass of the atom. It is calculated by adding the number of protons to the number of neutrons. Electrons are really light and have negligible mass (about 1/1840 times the mass of a proton), so we don't add their masses when calculating mass number. So, to get the number of neutrons in an atom, subtract the number of protons from the mass number.

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The byproduct of fermentation tha induces the coagulation of casein into the cheese curd is b. lactic acid.

Lactic acid causes the milk proteins casein to form into a cheese curd, because it increase acidity and the enzymes prefer for the coagulation.

Producing cheese curds is one of the first steps of makint a cheese.

Swiss cheese is a cheese made in Switzerland.

Swiss cheese is, usually, a semihard cheese made from cows milk with a characteristic holes.

Fermentation of milk is a metabolic process in which lactic acid (CH₃CHOHCOOH) and carbon dioxide are produced from sugar lactose:

C₅H₁₂O₆ → CH₃CHOHCOOH + C₂H₅OH + CO₂

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The amount of energy that must be absorbed or lost to raise or lower the temperature of 1 gram of liquid water by 1°C is 1 calorie.

A calorie (cal), or a small calorie, is the amount of energy needed to heat one gram of water by one degree Celsius. It is used to express the amount of energy released in a phase change or chemical reaction.

One small calorie is approximately 4.2 joules.

A calorie is a unit of energy.

A calorie was originally part of the metric system (SI), but now it is replaced with the joule (J).

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When performing an extraction between an aqueous solution and an organic solution or organic compound, density will determine the layer ending up at the bottom of the separation funnel.

In chemistry, a separatory funnel is a kind of funnel that separates two immiscible liquids.

It is a transparent funnel and when two immiscible liquids i.e aqueous and organic solution is poured into it, and then allowed to stand, after a while a distinguished layer is formed setting them apart from each other.

Due to the difference in density, the extraction becomes easier as the aqueous layer has a low density and stays at the top while the organic layer is at the bottom.

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VB theory does not indicate that the diatomic molecule He₂ is a viable species.

Helium has atomic number 2, it has 2 protons and 2 electrons.

Electron configuration of helium atom: ₂He 1s².

Helim (He) is a noble gas.

Noble gases (group 18) are in group 18: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn). They have very low chemical reactivity.

Noble gases have very stable electron configuration and does not need to gain electrons, only when they gain energy.

Valence bond (VB) theory explains chemical bonding.

Helium atom is stable and does not form molecule.

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Of the four species, only

CH₃COOH and CH₃NH₂ hydrogen bond

COOH can be formed via Water H and NH₂

Group. The species Na+ can be solvated with water through ionic dipole interactions rather than hydrogen bonding. As for C₂H₆ it can interact with water only by weak London dispersion forces

Hydrogen bonding refers to the attractive forces that occur between hydrogen atoms and highly electronegative atoms such as nitrogen, oxygen, and fluorine. These can occur intramolecularly or intermolecularly, depending on whether they occur in different molecules or in the same molecule. In general, hydrogen bonds are stronger than van der Waals forces, but weaker than ionic and covalent bonds.

Of the four species, only CH₃COOH and CH₃NH₂ hydrogen bond COOH can be formed via Water H and NH₂ Group. The species Na+ can be solvated with water through ionic dipole interactions rather than hydrogen bonding. As for

C₂H₆, it can interact with water only by weak London dispersion forces.

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Answer:

I believe that would be a liquid.

Explanation:

Answer: F=m*a

Explanation: Force equals mass times acceleration!

I hope this helps!

The student that had the most accurate and precise data is Mel (option D).

Accuracy is the degree of conformity of a measure to a true or standard value i.e. closeness to a standard or true value.

On the other hand, precision is the ability of a measurement to be reproduced consistently i.e. the closeness of measured values.

According to this question, students calculated the mass in grams of the baking soda being used.

It can be said that Mel, which measured the following values: 0.44g, 0.46g, 0.45g had the most accurate and precise value because they are both close to themselves and the true value.

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Answer:

D

Explanation:

Mel

The molarity of the sucrose solution is found to be 0.4146M

The term "molarity" (also known as "molar concentration," "amount concentration," or "substance concentration") refers to the amount of a substance per unit volume of the solution and is used to describe the concentration of a chemical substance, specifically a solute, in a solution.

Given:

Mass of sucrose, m = 50.4g

Volume of solution, v = 355ml = 0.355L

Molecular weight of sucrose = 342.3g/mol

To find:

Molarity, M = ?

Formula:

Molarity = amount of solute, n (moles) / volume of solution, v (L)

Calculations:

No. of moles of sucrose, n = mass of sucrose x (1 mole / molecular weight of sucrose)

n = 50.4 x (1/342.3)

n = 0.1472 moles

M = 0.1472 / 0.355

Molarity = 0.4146M

Result:

The sucrose solution has a molarity of 0.4146M.

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The element that has the largest volume is Magnesium

The density formula and the procedure we will use is:

d = m/v

Where:

Information about the problem:

Applying the density formula and clearing the volume we get:

d = m/v

v = m/ d

v(copper) = m/d(copper)

v(copper) = 5 g/ 8.96 g/ml

v(copper) = 0.5580 ml

v(silver) = m/d(silver)

v(silver) = 5 g/ 10.5 g/ml

v(silver) = 0.4762 ml

v(iron) = m/d(iron)

v(iron) = 5 g/ 7.89 g/ml

v(iron) = 0.6337 ml

v(magnesium ) = m/d(magnesium )

v(magnesium ) = 5 g/ 1.74 g/ml

v(magnesium ) = 2.8736 ml

It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.

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[tex]=3h\ x\ \frac{60 \min}{1h }\ x\ \frac{60\ sec}{1\ min}[/tex]

[tex]=10800\ sec[/tex]

Set up your equation so that your units cancel until you get to the unit you want. Hours and hours would cancel, and min and min would cancel, leaving you with sec which is the unit you want.

Remember: they can only cancel if one is on top and the other is on the bottom.

Answer:

1hr=60minutes

1min=60 seconds

then we have to convert 3hrs into seconds

now,

3*60*60=10,800

The ratio of the concentration of formate to formic acid required in a buffer system is 3.16 : 1.

pH = 4.25; pH of the solution

pKa = 3.75

Henderson–Hasselbalch equation: pH = pKa + log(cs/ck)

4.25 = 3.75 + log(cs/ck)

log(cs/ck) = 4.25 - 3.75

log(cs/ck) = 0.5

cs/ck = 10∧(0.5)

cs/ck = 3.16; ratio of formate to formic acid

A buffer can be defined as a substance that prevents the pH of a solution from changing by either releasing or absorbing H⁺ in a solution.

Buffer is a solution that can resist pH change upon the addition of an acidic or basic components and it is able to neutralize small amounts of added acid or base, pH of the solution is relatively stable.

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Answer:the electrons can possess only certain discrete energy values; values between those quantized values are not permitted.

Explanation:Both involve a relatively heavy nucleus with electrons moving around it, although strictly speaking, the Bohr model works only for one-electron atoms or ions.

Answer:

Its a element

Explanation:

Boron is made of atoms.

Answer:

element is the answer for your question

Explanation:

because i took a test on this

Answer:

A black spot will remain on the silver coin, but not on the nonsilver coin. Mustard naturally contains sulfur compounds, and sul- fur reacts with silver to form a black precipi- tate of silver sulfide (Ag2S)

Explanation:

The ph of a buffer solution was obtained by dissolving 17.0 g of [tex]KH_{2} PO_{4}[/tex]  and 30.0 g of  [tex]Na_{2} HPO_{4}[/tex]   in water and then diluting to 1.00L is 7.43.

We will apply the Henderson-Hasselblach equation to determine the pH:

pH= pKa + Log [A/AH]

when [tex]Na_{2} HPO_{4}[/tex] molar mass is 142 g/mol

A is the conjugate base [tex]HPO_{4} ^{-}[/tex] ions and as a result,

[tex][A]= \frac{30g}{142 g/mol}[/tex]

= 0.211 M

[tex]KH_{2} PO_{4}[/tex] has a molar mass of 136 g/mol.

Given that AH is the weak acid [tex]H_{2} PO_{4} ^{-}[/tex] ion,

[AH] = [tex]\frac{17.0 g}{136 g/mol.}[/tex]

= 0.125 M

and with [tex]H_{3} PO_{4}[/tex] having a pKa value of 7.21

then, substituting

∴ pH = 7.21 + log (0.211 / 0.125)

= 7.21 +0.227

=7.43

The pH of a buffer solution is 7.43.

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