There are exaclty 640 acres in one square mile. How many square meters are in 2.2 acres?

Answer:

ok

Explanation:

We need more information to solve this problem. Specifically, we need to know the volume (or concentration) of HCl used to react with the Mg. Without that information, we cannot determine how many grams of Mg reacted.

Answer:

C) one magnesium and one oxygen

b. testing the hypothesis

Answer:

1.  the absolute pressure in the tank before filling = 217 kPa

2. the absolute pressure in the tank after filling = 312 kPa

3. the ratio of the mass after filling M2 to that before filling M1 = 1.44

The correct relation is option c (\(\frac{M_{2} }{M_{1} } = \frac{P_{2} T_{1} }{P_{1} T_{2} }\))

Explanation:

To find  -

1. What is the absolute pressure in the tank before filling?

2. What is the absolute pressure in the tank after filling?

3. What is the ratio of the mass after filling M2 to that before filling M1 for this situation?

As we know that ,

Absolute pressure = Atmospheric pressure + Gage pressure

So,

Before filling the tank :

Given - Atmospheric pressure = 100 kPa ,  Gage pressure = 117 kPa

⇒Absolute pressure ( p1 )  = 100 + 117 = 217 kPa

Now,

After filling the tank :

Given - Atmospheric pressure = 100 kPa ,  Gage pressure = 212 kPa

⇒Absolute pressure (p2)  = 100 + 212= 312 kPa

Now,

As given, volume is the same before and after filling,

i.e. \(V_{1}\) = \(V_{2}\)

As we know that, P ∝ M

⇒ \(\frac{p_{1} }{p_{2} } = \frac{m_{1} }{m_{2} }\)

⇒\(\frac{m_{2} }{m_{1} } = \frac{p_{2} }{p_{1} }\)

⇒\(\frac{m_{2} }{m_{1} } = \frac{312 }{217 } = 1.4378\) ≈ 1.44

Now, as we know that PV = nRT

As V is constant

⇒ P ∝ MT

⇒\(\frac{P}{T}\) ∝ M

⇒\(\frac{M_{2} }{M_{1} } = \frac{P_{2} T_{1} }{P_{1} T_{2} }\)

So, The correct relation is c option.

Explanation

12. Given equation:

From the Periodic Table; the Molar mass of H = 1.01 g, Mg = 24.31 g, Cl = 35.45 g

Therefore, the molar masses of all substances involved are:

Mg = 24.31 g

2HCl = 2(1.01 + 35.45)g = 2 x 36.46 g = 72.92 g

H₂ = 2 x 1.01 g = 2.02 g

MgCl₂ = 24.31 g + 2(35.45) = 24.31 g + 70.90 g = 95.21 g

Answer:

amino acids

Explanation:

A mutation is a single or multiple event which brings a change in a genetic material of the organisms. A mutation will alter a DNA base pair that causes deletion or substitution of one amino acid in a protein encoded by a gene.

Answer:

B: Animo acids

Explanation:

Explanation:

Butanol (С4Н9OH)

Structural formula is :-

CH3-CH2-CH2-CH2-OH

Answer:

B

Explanation:

AH is positive so the forward reaction is endothermic. Thus, increasing temperature would cause equilibrium to shift to the right as endothermic reaction favors higher temperature. This increases the yield of NO.

A physical change in matter or substances differs from a chemical change in various ways. A substance's physical state has no bearing on its inherent properties.

A new material is created through a chemical transformation, which involves a chemical reaction, and energy is either released or absorbed.

While a physical change occurs when matter changes forms without changing its chemical identity, a chemical change is the outcome of a chemical reaction. The physical transformations of boiling, melting, freezing, and shredding are a few examples.

Chemical Transformation: A permanent change in which new chemicals are created is referred to as a chemical change. Its physical, chemical, and chemical makeup differ from those of the original material.

There is no creation of new substances during physical changes. New compounds are created as a result of chemical transformation. Examples include melting wax, boiling water, shredding paper, etc.

Learn more about physical and chemical changes refer

https://brainly.com/question/17166994

#SPJ9

The reaction time decreases as the temperature increases of the reaction mixture increases.

A sample record of results is:

An increase in temperature leads to an increase in reaction rate or a decrease in reaction time.

The increase in temperature provides more thermal energy to the reactant molecules, which leads to an increase in the average kinetic energy of the molecules. As a result, more reactant molecules have sufficient energy to overcome the activation energy barrier and undergo successful collisions, leading to an increased reaction rate.

Learn more about reaction time at: https://brainly.com/question/26142029

#SPJ1

the possible quantum numbers (ordered n, ℓ, mℓ ) are:Option B.5, 3, -3 and Option C. 4, 3, -2

The quantum numbers n, ℓ, mℓ represent respectively the principal quantum number, the orbital angular momentum quantum number and the magnetic quantum number.

These are the three most important quantum numbers. T

here is another quantum number called the spin quantum number, denoted by ms.

Let's see which of the given quantum number sets is possible.2, 1, 3 is not possible because for ℓ = 1, mℓ can only be -1, 0, or 1. 5, 3, -3 is possible.4, 3, -2 is possible. -4, 3, 1 is not possible.

For any value of ℓ, mℓ must be between -ℓ and +ℓ. e. 2, 1, -2 is not possible because for ℓ = 1, mℓ can only be -1, 0, or 1. f. 3, 2, 2 is not possible because for ℓ = 2, mℓ can only be -2, -1, 0, +1, or +2. g. 3, 3, 1 is not possible because for any value of ℓ, mℓ must be between -ℓ and +ℓ.

Therefore, the possible quantum numbers (ordered n, ℓ, mℓ ) are:5, 3, -34, 3, -2

For more questions on quantum numbers

https://brainly.com/question/30881398

#SPJ8

Answer:

Group 12

Explanation:

Group 12 transition metals include; zinc cadmium, mercury and copernicium. Because of their striking difference in property when compared to other transition elements, they are sometimes called post-transition elements.

These elements possess completely filled ns and nd orbitals hence they are diamagnetic. They have the lowest melting points and densities among all transition metals. Their densities in gcm^-3 are; Zn (7.14), Cd(8.65) and Hg (13.5). We can see that unlike other transition metal groups, their densities vary only within a narrow margin hence they have properties slightly different from other transition elements.

Yes the all types of the consumers are the heterotrophs.

The consumers play a very important role in the ecosystem of the earth by maintaining the population and growth to the organism of the ecosystem. If we remove the consumer or either the producer then the whole system of the ecosystem will be destabilize, and thus the ecosystem can survive from the overpopulation problem and lack of food problem. The other organism can transfer energy to the consumer.

Both the primary (herbivores) and as well as the secondary (carnivores and omnivores) consumers are heterotrophs.

So we can conclude that yes the all types of the consumers are the heterotrophs.

Learn more about Food web here: https://brainly.com/question/17708630

#SPJ1

Saponification number = (V × M × F × 56.1) / W

Where:

V = volume of HCl used in the back titration

M = molarity of HCl

F = factor of KOH (which is 1 for pure KOH)

W = weight of the butter sample used in grams

First, we need to calculate the amount of KOH used in the saponification reaction:

0.5131 M KOH = 0.5131 moles KOH / liter

25.00 mL KOH = 0.02500 L KOH

moles KOH used = 0.5131 moles/L × 0.02500 L = 0.0128 moles KOH

Since the saponification reaction is a 1:1 reaction between KOH and the triacylglycerol in the butter sample, the amount of butter used is also 0.0128 moles.

Next, we need to calculate the amount of HCl that reacted with the excess KOH:

0.5000 M HCl = 0.5000 moles HCl / liter

10.26 mL HCl = 0.01026 L HCl

moles HCl used = 0.5000 moles/L × 0.01026 L = 0.00513 moles HCl

Since the reaction between HCl and KOH is also a 1:1 reaction, the moles of KOH that were not used in the saponification reaction is equal to the moles of HCl used in the back titration:

moles KOH not used = moles HCl used = 0.00513 moles HCl

To find the saponification number,

Saponification number = (V × M × F × 56.1) / W

Saponification number = (0.01026 L × 0.5000 moles/L × 1 × 56.1) / 2.085 g

Saponification number = 6.50

Therefore, the saponification number for this sample of butter is 6.50.

To know more about Saponification:

https://brainly.com/question/2263502

#SPJ1

3. Convection Current

But just a tip Next time try to emphasize the question a little more ! Hope this helps :)

Answer: i think its empirical

Explanation:

Explanation:

The number of protons and neutrons. you can simply subtract the number of protons, or atomic number, from the mass number to get your final answer.

To calculate the mass percentage of any chemical element in a given compound, we will divide the mass of the element in 1 mole of the compound by the compound's molar mass and multiply the result by 100

An element is a substance which cannot be split into simpler forms by an ordinary chemical process. This simply goes to say that elements are substances which cannot be decomposed into simpler substances by ordinary chemical reactions.

An atom is the smallest unit or part of an element which can take part in a chemical reaction.

On a general note, elements are classified as thus:

So therefore, to calculate the mass percentage of any chemical element in a given compound, we will divide the mass of the element in 1 mole of the compound by the compound's molar mass and multiply the result by 100

Learn more about atoms and elements:

https://brainly.com/question/6258301

#SPJ1

A compound is a material formed by chemically bonding two or more chemical elements.

To calculate the mass percent of an element in a compound, we divide the mass of the element in 1 mole of the compound by the compound's molar mass and multiply the result by 100.

So we can conclude that: A compound is a material formed by chemically bonding two or more chemical elements.

Learn more about Compounds here: https://brainly.com/question/26487468

#SPJ1

Answer:

different from ionic or covalent bonding

Explanation:

Answer:

Molecular formula = C₄H₈

Explanation:

Given data:

Empirical formula = CH₂

Molar mass of compound = 56.12 g/mol

Molecular formula = ?

Solution:

Molecular formula:

Molecular formula = n (empirical formula)

n = molar mass of compound / empirical formula mass

Empirical formula mass = 12× 1 + 1.01 × 2= 14.02 g/mol

n = 56.12 / 14.02

n = 4

Molecular formula = n (empirical formula)

Molecular formula = 4 (CH₂)

Molecular formula = C₄H₈

The states of matter are solid, liquid, gas, and plasma.

Addition of heat to a substance helps the molecules break the intermolecular forces of attraction.

Elements are pure substances consisting of same type of atoms while Compounds are pure substances consisting of two or more different atoms.

The states of matter are four types namely:

Addition of heat to a substance results in phase change as the heat added to the substance helps the molecules break the intermolecular forces of attraction.

Elements are pure substances consisting of entirely the same type of atoms, for example hydrogen.

Compounds are pure substances consisting of two or more different atoms, for example water.

A pure (hom0genous) substance consists of one more elements chemically joined together while mixtures consists of two or more substances physically joined together.

Physical changes are changes that can be easily reversed such as the melting of candle wax while chemical changes are changes that cannot be easily reversed such as rusting of iron.

The modern atomic theory is the theory that atoms consists of the three fundamental particles; electrons, protons and neutrons.

Democritus stated that all matter consists of atoms which are extremely small and indestructible.

Dalton stated that all elements consists of small indivisible particles called atoms and that atoms of the same element were alike in all respects.

Atoms consists of electrons which are found in energy levels or orbits around the nucleus where the protons and neutrons are found.

Isotopes are atoms of the same element having different masses.

Atomic number of an element is the number of protons in the atom while the mass number is the sum of protons and neutrons in the atom.

The period table of elements is arranged in increasing order of atomic number of elements into groups and periods.

In conclusion, matter is the main component of materials and it exists in four different states.

Learn more about states of matter at: https://brainly.com/question/195421

#SPJ1

Answer: 7 g

Explanation: 42/6=7

The partial charges on each fluorine atom are negative. Option B) The central O atom is the correct answer. Option B

The partial charges in a molecule are determined by the electronegativity values of the atoms involved. Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. In the case of \(F_2O\), fluorine (F) is more electronegative than oxygen.

Fluorine is the most electronegative element on the periodic table, meaning it has a high ability to attract electrons. Oxygen is also relatively electronegative but less so than fluorine. When fluorine atoms bond with oxygen, the shared electrons will be pulled more towards the fluorine atoms, creating a polar covalent bond.

In \(F_2O\), each fluorine atom will pull the shared electrons towards itself, resulting in a higher electron density around the fluorine atoms. This creates a region of partial negative charge around the fluorine atoms.

Conversely, the oxygen atom will have a region of lower electron density and, therefore, a partial positive charge. This is because the shared electrons spend more time around the fluorine atoms due to their higher electronegativity.

Option B

For more such question on partial charges visit:

https://brainly.com/question/29974793

#SPJ8

It is an amine, and it has less polar nitrogen-hydrogen and oxygen-hydrogen bonds.

A compound's boiling point is a physical characteristic. These intramolecular linkages between the molecules that make up a chemical affect these physical characteristics.

Alcohols and amino acids have the same kind of intermolecular linkages. The hydrogen bond is the name of this kind of bond.

The electrical attraction between a hydrogen atom from one molecule and an electronegative atom from a nearby molecule is known as a hydrogen bond.

The strength of the bond is in the following order: H.....F > H.....O > H......N

The H....N hydrogen bonds exist in amines, whereas the H....O hydrogen bonds exist in alcohols.

Consequently, the alcohol's hydrogen bonds are stronger and it will impart a higher boiling point on the compound.

Learn more about hydrogen bonds here-

https://brainly.com/question/10904296

#SPJ9

Answer:uses world like

Explanation:

Answer:

1562 g

Explanation:

Step 1: Given data

Number of atoms of copper: 1.480 × 10²⁵ atoms

Step 2: Calculate the moles corresponding to 1.480 × 10²⁵ atoms of copper

We will use the Avogadro's number: there are 6.022 × 10²³ atoms of Cu in 1 mole of atoms of Cu.

1.480 × 10²⁵ atom × (1 mol/6.022 × 10²³ atom) = 24.58 mol

Step 3: Calculate the mass corresponding to 24.58 moles of copper

The molar mass of Cu is 63.55 g/mol.

24.58 mol × 63.55 g/mol = 1562 g (with 4 significant figures)

Answer:

Within smokestacks and tailpipes

Explanation:

this is where manmade ozone is usually produced

The volume of the gas at STP is approximately 417.78 mL when the initial volume of the gas at 800 mmHg pressure and 30 degrees Celsius is 480 mL

To determine the volume of the gas at STP (Standard Temperature and Pressure), we can use the combined gas law equation:

(P1 * V1) / (T1) = (P2 * V2) / (T2)

Where:

P1 = Initial pressure

V1 = Initial volume

T1 = Initial temperature

P2 = Final pressure (STP is 1 atmosphere or 760 mmHg)

V2 = Final volume (to be determined)

T2 = Final temperature (STP is 0 degrees Celsius or 273.15 Kelvin)

Substituting the given values into the equation:

(800 mmHg * 480 mL) / (303.15 K) = (760 mmHg * V2) / (273.15 K)

Simplifying the equation:

(800 mmHg * 480 mL * 273.15 K) = (760 mmHg * V2 * 303.15 K)

Now, solving for V2 (the final volume):

V2 = (800 mmHg * 480 mL * 273.15 K) / (760 mmHg * 303.15 K)

Calculating the expression:

V2 ≈ 417.78 mL

Therefore, the volume of the gas at STP is approximately 417.78 mL when the initial volume of the gas at 800 mmHg pressure and 30 degrees Celsius is 480 mL.

for more questions on volume
https://brainly.com/question/29796637

#SPJ11

Note- The completed question is

What volume does the gas occupy at STP when the volume of a gas at 800 mm hg pressure at 30 degree Celsius is 480 ml?

Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.

To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

5000 mL = 5000/1000 = 5 L

Now, we can rearrange the formula to solve for moles of solute:

moles of solute = Molarity (M) x volume of solution (L)

moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol

Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:

mass of solute = moles of solute x molar mass of solute

mass of glucose = 1.075 mol x 180.16 g/mol

mass of glucose = 194.0 g (rounded to three significant figures)

Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.

For more such questions on glucose visit:

https://brainly.com/question/397060

#SPJ8