What type of alkane does not follow the CnH2n+2 formula?
Select the correct answer below:
Linear alkanes
Branched alkanes
Cyclic alkanes
All alkanes follow the formula

Answer:

A.) 0.43 g

Explanation:

Before you can calculate the mass, you need to find the moles. You can do this by using Avogadro's Law:

V₁ / n₁ = V₂ / n₂

In this equation, "V₁" and "n₁" represent the first balloon's volume and mole value. "V₂" and "n₂" represent the second balloon's volume and mole value. Since you are searching for the first balloon's mole value, you can plug the other values into the equation and simplify to find n₁.

V₁ = 1.54 L                         V₂ = 0.72 L

n₁ = ? moles                      n₂ = 0.100 moles

V₁ / n₁ = V₂ / n₂                                               <----- Avogadro's Law

1.54 L / n₁ = 0.72 L / 0.100 moles                 <----- Insert values

1.54 L / n₁ = 7.2                                              <----- Simplify right side

1.54 L = 7.2 x n₁                                              <----- Multiply both sides by n₁

0.214 = n₁                                                       <----- Divide both sides by 7.2

Now, you can find the mass using the molar mass of the gas. Remember, hydrogen exists as a diatomic molecule.

Atomic Mass (H₂): 2(1.008 g/mol)

Molar Mass (H₂): 2.016 g/mol

0.214 moles He            2.016 g
--------------------------  x  -----------------  =  0.43 g H₂
                                       1 mole

Answer:

the formula is Cu(OH)2

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Answer:

PLEASE MARK AS BRAINLIEST!!

Explanation:

Apply rubbing alcohol, hairspray, or hand sanitizer to dilute the stain, making it easier to remove during the wash. These solvents help tackle most types of ink stains, but remember to test the stained garment for colorfastness first, as they can also attack fabric dyes and cause further damage.

To determine the number of grams of oxygen in 6.4 moles of Al(ClO4)3, we need to consider the chemical formula and the molar mass of Al(ClO4)3.

The molar mass of Al(ClO4)3 can be calculated by adding up the atomic masses of its constituent elements:

Al: 26.98 g/mol

Cl: 35.45 g/mol

O: 16.00 g/mol (there are 4 oxygen atoms in each perchlorate ion, ClO4⁻)

Molar mass of Al(ClO4)3 = (26.98 g/mol) + 3*(35.45 g/mol) + 4*(16.00 g/mol)

= 26.98 g/mol + 106.35 g/mol + 64.00 g/mol

= 197.33 g/mol

Now, we can use the molar mass to convert moles of Al(ClO4)3 to grams of oxygen:

Moles of Al(ClO4)3 = 6.4 mol

Molar mass of Al(ClO4)3 = 197.33 g/mol

Grams of oxygen = Moles of Al(ClO4)3 * (4 moles of O / 1 mole of Al(ClO4)3) * (16.00 g/mol)

= 6.4 mol * 4 * 16.00 g/mol

= 409.6 g

Therefore, there are 409.6 grams of oxygen in 6.4 moles of Al(ClO4)3.

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To dissolve one substance, attractions between solute and solvent particles must be formed, steps involved are:

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To analyze the given transfer function, h(s) = (2s + 128) / (s^2 + as + b), we need to determine the values of a and b, which will define the behavior of the filter.

The transfer function represents a second-order passive filter. To find the values of a and b, we can compare the given transfer function with the general form of a second-order transfer function:

h(s) = ωn^2 / (s^2 + 2ζωn s + ωn^2),

where ωn is the natural frequency and ζ is the damping ratio.

By comparing the given transfer function with the general form, we can equate the coefficients:

s^2 + as + b = s^2 + 2ζωn s + ωn^2.

From this equation, we can determine the values of a and b as follows:

1. The coefficient of s in the given transfer function is 2, while the general form has 2ζωn. Therefore, we have:

2 = 2ζωn.

2. The constant term in the given transfer function is 128, while the general form has ωn^2. Therefore, we have:

b = ωn^2.

Now, we have two equations:

2 = 2ζωn,

b = ωn^2.

Since we don't have specific values for ωn and ζ, we cannot determine the exact values of a and b. We need additional information or specifications to calculate those values.

The given transfer function provides the numerator and denominator coefficients but does not provide enough information to determine the specific values of a and b.

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Answer: Theft starts at c4 down

impression starts L14 left

investigator starts at m3

criminalistics starts at o1

pathologists starts at m14

toxicology b11

fingerprints c2

court n13

witness n8

microscope j13

edmond locard m1

expertise m4

murder j13

cant find other ones rn

Explanation:

The reaction for the formation of HI, at the given time, has a reaction quotient of 613.

What is the reaction quotient?

Reaction quotient is the ratio of the concentration of product and reactant raised to the stoichiometric power at a given time interval.

The chemical reaction for the formation of HI is given as:

\(\rm H_2\;+\;I_2\;\rightarrow\;2\;HI\)

The reaction quotient is given as:

\(\rm Q=\dfrac{[HI]^2}{[H_2]\;[I_2]}\)

The concentration of system at the time, t has been:

Hydrogen = 0.1 M

Iodine = 0.2 M

HI = 3.5 M

Substituting the values for reaction quotient:

\(\rm Q=\dfrac{(3.5)^2}{(0.1)(0.2)}\\ Q=613\)

The reaction quotient for the reaction is 613. Thus, option D is correct.

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Answer 1:

a variable whose value depends on that of another

Example 1:

In a study to determine whether how long a student sleeps affects test scores, the independent variable is the length of time spent sleeping while the dependent variable is the test score.

Answer 2:

a variable whose variation does not depend on that of another.

Example 2:

The dependent variable is the variable that is being measured or tested in an experiment. For example, in a study looking at how tutoring impacts test scores, the dependent variable would be the participants' test scores, since that is what is being measured.

Independent Variable is a variable (often denoted by x) whose variation does not depend on that of another.

Example: A scientist is testing the effect of light and dark on the behavior of moths by turning a light on and off. The independent variable is the amount of light

Dependent Variable is a variable (often denoted by y) whose value depends on that of another.

Example: A scientist is testing the effect of light and dark on the behavior of moths by turning a light on and off. The moth's reaction is the dependent variable.

Answer:

The correct answer is option 3. Equilibrium is achieved in a chemical reaction when the rate of the forward reaction is the same for the rate of the backward reaction and when the reaction has stopped.

Explanation:

A balanced chemical equation is where the number of reactants is equal to several products.

A balanced chemical equation is one in which the number if reactants is equal to number of products.

1) Zn + 2AgCl → ZnCl₂ + 2Ag

2) FeCl₂ + 2HbS →  FeCl₂ + 2HCl + 2S

3) 2Ag₂O   →   4 Ag + 2O₂

4)3AlO₂     →  3Al + 3 O₂

5) K₂   + 2HbO → 2KOH + 2Hb

6) 3CaCO₂  →  3CaO + 3CO₂

7) 2Mg + O₂     → 2MgO

8) 2CO + 2FeO₂  →  2Fe + 2CO ₂

Therefore, A balanced chemical equation is where the number of reactants is equal to several products.

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Answer:

Covalent bonds are the sharing of electrons between two nonmetals. Ionic bonds are a transfer of electrons between a metal and a nonmetal. As seen in ionic bonds, electrons need to be either lost or gained for an element to become stable. In covalent bonds, nonmetals connect to nonmetals through sharing electrons which creates bonds.

Explanation:

The valence states provided are general representations and may vary depending on specific conditions and coordination environments.

a. Uvarovite: The mineral formula for uvarovite is Ca3Cr2(SiO4)3. In this formula, the valence state of calcium (Ca) is +2, the valence state of chromium (Cr) is +3, and the valence state of silicon (Si) is +4. Oxygen (O) is usually assigned a valence state of -2.

b. Azurite: The mineral formula for azurite is Cu3(CO3)2(OH)2. In this formula, the valence state of copper (Cu) is +2, carbonate (CO3) has a valence state of -2, and hydroxide (OH) has a valence state of -1.

c. Cuprite: The mineral formula for cuprite is Cu2O. In this formula, the valence state of copper (Cu) is +1, and oxygen (O) is usually assigned a valence state of -2.

d. Gypsum: The mineral formula for gypsum is CaSO4·2H2O. In this formula, the valence state of calcium (Ca) is +2, sulfur (S) has a valence state of +6, and oxygen (O) is usually assigned a valence state of -2. The water molecules (H2O) do not have a net charge.

e. Galena: The mineral formula for galena is PbS. In this formula, the valence state of lead (Pb) is +2, and sulfur (S) has a valence state of -2.

It's important to note that the valence states provided are general representations and may vary depending on specific conditions and coordination environments.

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If more \(H_{2}\) and \(N_{2}\) are added to the reaction 3\(H_{2}\) + N2 → 2\(NH_{3}\) after it reaches equilibrium, two events will occur Shift in Equilibrium and Increased Yield of \(NH_{3}\)

1. Shift in Equilibrium: According to Le Chatelier's principle, when additional reactants are added, the equilibrium will shift in the forward direction to consume the added reactants and establish a new equilibrium. In this case, more \(NH_{3}\) will be produced to counteract the increase in \(H_{2}\) and \(N_{2}\).

2. Increased Yield of \(NH_{3}\): The shift in equilibrium towards the forward reaction will result in an increased yield of \(NH_{3}\). As more \(H_{2}\) and \(N_{2}\) are added, the reaction will favor the production of \(NH_{3}\) to maintain equilibrium. This will lead to an increase in the concentration of \(NH_{3}\) compared to the initial equilibrium state.

It is important to note that the equilibrium position will ultimately depend on factors such as the concentrations of \(H_{2}\), \(N_{2}\), and \(NH_{3}\), as well as the temperature and pressure of the system. By adding more reactants, the equilibrium will adjust to achieve a new balance, favoring the formation of more \(NH_{3}\).

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Answer:

I. Luke has 81 postcards.

II. Brian has 54 postcards.

Explanation:

Let Luke's collection be L

Let Brian's collection be B

Translating the word problem into an algebraic equation, we have;

L = 27 + B

L + B = 135

Substituting equation 1 into equation 2, we have;

27 + B + B = 135

27 + 2B = 135

2B = 135 - 27

2B = 108

B = 108/2

B = 54

Therefore, Brian has 54 postcards.

To find the value of L;

L = 27 + B

L = 27 + 54

L = 81

Therefore, Luke has 81 postcards

The answer is option

The reaction:

is a Synthesis reaction, because from 2 different substances it is produced

The concentration of CO2 in PPBv in inhaled and exhaled air is 400 ppb and 40,000 ppb, respectively.

The concentration of Arsenic in groundwater sample is 10 ppb. Express this concentration in mg/L.

The concentration of Arsenic in groundwater sample is given as 10 ppb.

To express the concentration in mg/L, we need to use the conversion factor.

1 ppb is equal to 1 µg/L.1 mg/L is equal to 1,000,000 ppb.

Substituting the given values in the equation, we get;

10 ppb = 10 µg/L

10 µg/L = 0.01 mg/L

Therefore, the concentration of Arsenic in groundwater sample expressed in mg/L is 0.01 mg/L.

The inhaled air has 0.04% CO2 while the exhaled air has 4% CO2. Express the concentration of CO2 in PPBv in inhaled and exhaled air.

The concentration of CO2 in PPBv in inhaled and exhaled air can be calculated as follows;
We know that 1% is equal to 10,000 ppb.

So,0.04% is equal to 0.04 × 10,000 = 400 ppb (in inhaled air)

Similarly,4% is equal to 4 × 10,000 = 40,000 ppb (in exhaled air)

Therefore, the concentration of CO2 in PPBv in inhaled and exhaled air is 400 ppb and 40,000 ppb, respectively.

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Electrostatic attraction hold ionic solids together.

What is Electrostatic attraction?

To understand the word ‘Electrostatic appeal’, we need to first revise the fundamentals of the Electrostatic area. It says that similar costs (like positive & tremendous) repel each other and distinct fees (like fine and negative) appeal to each other.

Electrostatic appeal is a force of enchantment which is exerted through two in contrast to or numerous (contrary) expenses on each different whilst they may be stored at some finite distance aside. That is additionally referred to as contactless appeal between  contrary prices or we are able to say this Electrostatic pressure attracts  distinct expenses with out touching them.

The concept of electrostatic pressure turns into clearer if we remember a sensible instance. If we convey North Pole of a magnet near to North Pole of another piece of magnet then those  portions of magnet will repel every different and if we carry North Pole of one magnet close to the south pole of some other piece of magnet then they may entice to every other.

As we know those atom donate the electron gets positively charged and those atoms gains the electron gets negatively charged. The charge on the atoms are the responsible for the force in the ionic bond.

We know that force between two charge particle is known as electrostatics force. If charge particle is having same sign charge then it will be repulsive force and If charge particle is having opposite sign charge then it will be attraction  force.

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Answer:

Fabric is made of cotton.

Explanation:

Hope that helps :)

Answer:

Hey mate your answer is

cotton

hope it helps you

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Answer:

When two clear aqueous solutions react, they sometimes form solids in the solution. The solid is called a precipitate. Precipitation reactions occur when the cations of one reactant and the anions of a second reactant found in aqueous solutions combine to form an insoluble ionic solid that we call a precipitate.

Explanation:

Answer:

What is the question needing to be answered?

Explanation:

Usually with a scientific hypothesis, you ask the question in an if, then statement. For example: If it rains outside, then the ground will be wet. It's kind of like a cause and effect statement.

75 for all

Explanation:

Answer:

Explanation: Li= Lithium, Na= Sodium, K= Pottasium, Rb= Rubdium Cs= Cesiuna, Fr= Fransium

6. Energy levels increases as if you move down a group during the number of electrons increases again.

7. A charge with higher and effective nuclear charge makes greater attractions to the electrons, pulling the electrons cloud closer to the nucleus makes it in a smaller atomic radius.

8. Ge= Germanium, He= Helium, O=Oxygen, Barium

Answer:

613.0 g

Explanation:

2 L = 2000 mL

(30.65 g/100 mL)*2000 mL = 613.0 g

Given:

Solution:

Firstly,

We converted L to mL

2 L = 2 × 1000 mL = 2000 mL [ 1 L = 1000 mL ]

Now,

Solute = 30.65/100 × 2000

= 30.65 × 2000 / 100

= 61,300/100

= 613

The ionization energy of an electron in the n=9 principal level of a hydrogen atom is: 0.1679 kJ/mol.

The ionization energy of an electron is the energy required to remove the electron from its current energy level. In the case of a hydrogen atom, the ionization energy can be calculated using the formula:

E = -13.6 * (Z^2 / n^2) kJ/mol
where E is the ionization energy,
Z is the atomic number (which is 1 for hydrogen), and
n is the principal quantum number.

Plugging in the values:

E = -13.6 * (1^2 / 9^2) kJ/mol

E = -13.6 * (1 / 81) kJ/mol

E = -13.6 / 81 kJ/mol

Converting to a positive value:

E = 13.6 / 81 kJ/mol

E = 0.1679 kJ/mol (rounded to four decimal places)

Therefore, the ionization energy of an electron in the n=9 principal level of a hydrogen atom is approximately 0.1679 kJ/mol.

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Answer:

0.282 M

Explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

The concentration of the 15.0 mL sample of HCl is 0.282 M.

To find the concentration of HCl, we can use the concept of stoichiometry and the balanced chemical equation for the reaction between HCl (acid) and NaOH (base):

\(HCl + NaOH - > NaCl + H_2O\)

The balanced equation shows a 1:1 mole ratio between HCl and NaOH. Therefore, the moles of HCl that reacted will be equal to the moles of NaOH used at the equivalence point.

First, we find the moles of NaOH used:

Moles of NaOH = Volume (in L) × Concentration

Moles of NaOH = 0.0282 L × 0.150 mol/L = 0.00423 mol

Since the moles of HCl and NaOH are equal, the moles of HCl are also 0.00423 mol.

Now, we calculate the concentration of HCl:

Concentration of HCl = Moles of HCl / Volume (in L)

Concentration of HCl = 0.00423 mol / 0.0150 L = 0.282 M

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At a pH < 5, the zwitterion for alanine will have a net positive charge.

Alanine has two functional groups: an amino group (-NH2) and a carboxyl group (-COOH). At pH values below the pI of alanine (which is 6), the amino group is protonated and becomes NH3+, while the carboxyl group remains deprotonated and becomes COO-.

So, the zwitterion for alanine at a pH < 5 would have a positive charge on the amino group (NH3+) and a negative charge on the carboxyl group (COO-). Since the positive charge on the amino group is greater than the negative charge on the carboxyl group, the overall charge on the zwitterion will be positive.

Therefore, the correct answer is that the zwitterion for alanine at a pH < 5 will have a net positive charge.

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Answer:

24g÷8g/ml=3

volume =3

As the effective nuclear charge increases, electron affinity generally increases.

Electron affinity increases to the right, while EI increases to the right and upwards. Thus, the general trend of electronegativity is to grow to the right and upwards. The further to the right, the greater the effective nuclear charge and the greater the atom's ability to pull electrons toward it.

In this case, we can say that as the effective nuclear charge increases, electron affinity generally increases.

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Sweat evaporates quickly at low relative humidity, the amount of water vapor in the atmosphere, so it makes the body feel cooler. If the humidity is high that means there is a lot of water vapor in the air and thus the sweat cannot evaporate and forms pools on our skin making us feel uncomfortable.

Hope that helps!