Draw the products formed when 2−propanol [(CH3)2CHOH], the main ingredient of rubbing alcohol, is treated with H2SO4.

Answer:

Element symbol: Kr.

Mass number: 77.

Charge : 0.

Explanation:

Hello,

In this case, since such substance has the same amount of protons and electrons we can infer it is an atom whose number of neutrons is defined by considering its atomic mass or mass number and atomic number which is actually equal to the number of protons and electrons (36):

[tex]neutrons=atomic\ mass - atomic\ number[/tex]

In such a way, solving for the atomic mass we obtain:

[tex]atomic\ mass=neutrons+ atomic\ number\\\\atomic\ mass=41+36=77[/tex]

It means that the element is krypton (Kr) as it has 36 electrons and protons so its charge is 0.

Best regards.

Answer:

can you provide a picture?

Answer:

C) 3.37 moles .

Explanation:

Hello,

In this case, considering that the atomic mass of aluminum is 27.0 g/mol, the moles in 90.93 g of aluminum are computed via the following dimensional analysis:

[tex]n=90.93 gAl*\frac{1molAl}{27.0gAl} \\\\n=3.37molAl[/tex]

Thus, answer is C) 3.37 moles .

Best regards.

Answer:

a. 13.5 mL

b. 4.01 g and 112.0 mL

c. 22.3 mL

d. 2.62 g/mL

e. it will float on bromine and mercury

Explanation:

a. 13.534=10/x

b. 8.920=x/0.45 and 8.920= 1000/x. the reason its 1000 is because 1 kg is converted to grams, same unit for the density.

c. 0.789=17.6/x

d. 68.2-56.3 is the volume of the quartz. so 31.18/11.9 is the density

e. 33.93/12.5 gives you the density which is 2.7144. so in order to float, it has to be in a substance with a greater density such as bromine with a 3.119 density.

Hope that helped!

Answer: A solid is something that can hold its own shape and is hard to compress (squash). However, ice is different from most solids because its molecules are less densely packed than in liquid water so ice takes up a little more space than the same amount of liquid water. This is why ice floats.

Explanation: Hope it works!!!!!

Answer:

a. 473mL.

b. 79.38kg

c. 24.47lb of fat

d. 42.5g of N.

Explanation:

a. A qt is equal to 946mL. 0.500qt are:

0.500qt * (946mL / 1qt) = 473mL

b. 1lb is equal to 0.4536kg, 175lb are:

175lb *(0.4536kg / 1lb) = 79.38kg

c. The fat in kg of the athlete is:

74kg * 15% = 11.1kg of fat. In pounds:

11.1kg * (1lb / 0.4536kg) = 24.47lb of fat

d. The mass of nitrogen in the fertilizer is:

10.0oz * 15% = 1.5oz of N

1 oz is equal to 28.35g. 1.5oz are:

1.5oz * (28.35g / 1oz) = 42.5g of N

Answer:

have the same number of atoms of each element in the reactants and in the products

Explanation:

The basic principle in balancing a chemical equation would simply be to have the same number of atoms of each element in the reactants and in the products.

A balanced chemical equation is one that has the same number of atoms of each element on the reactant and the product's side of the equation. For example, consider the equation below:

                     [tex]H_2 + O_2 --> H_2O[/tex]

On the reactant's side, there are 2 atoms of H and O while there are 2 atoms of H and 1 atom of O on the product's side. This is an imbalanced equation. In order for it to be balanced, the number of atoms of H and O on the reactant side must be equal to the number of H and O on the product side as below.

                        [tex]2H_2 + O_2 --> 2H_2O[/tex]

Answer:

[tex]2.0 \times 10^{2} cm^{3}[/tex]

Explanation:

Step 1: Given data

Step 2: Calculate the initial volume

We will use the following expression.

V = 4/3 × π × r³

V = 4/3 × π × (2.5 cm)³

V = 65 cm³

Step 3: Calculate the final volume

Assuming ideal behavior, we can calculate the final volume of the bubble using the combined gas law.

[tex]\frac{P_1 \times V_1 }{T_1} = \frac{P_2 \times V_2 }{T_2}\\V_2 = \frac{P_1 \times V_1 \times T_2 }{T_1 \times P_2} = \frac{3.2atm \times 65cm^{3} \times 298K }{305K \times 1atm} = 2.0 \times 10^{2} cm^{3}[/tex]

Answer:

114450

Explanation:

2*109 = 218

5*105 = 525

218*525 = 114450

Answer:

A- conjugate acid

B- conjugate base

C- conjugate base

D- conjugate acid

Explanation:

According to the Brownstead-Lowry definition of acids, an acid donates a proton while a base accepts the proton.

If we look at the species ABCD, species A and D donate protons while species B and C accept protons.

C is the conjugate base of A while D is the conjugate acid of B, hence the answer.

This question is incomplete, the complete question is;

When 4.28 g of a certain molecular compound X are dissolved in 60.0 g of dibenzyl ether [(C₆H₅CH₂)₂0] , the freezing point of the solution is measured to be -3.2°C . Calculate the molar mass of X.

If you need any additional information on dibenzyl ether, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to significant digit.

Answer: molar mass of solute (X) is 88.03 g/mol

Explanation:

Given that;

mass of solute = 4.28 g

mass of solvent = 60.0 g = 0.060 kg        (Dibenzyl ether)

depression constant kf = 6.17 °CKg/mol

Freezing Point of solvent T₀ = 1.80°C       (Dibenzyl ether)

freezing point of solution Tsol = -3.20°C

Now we know that

Depression in freezing point ΔTf = depression constant kf × molaity m

and (ΔTf = T₀-Tsol)

so T₀ - Tsol = kf × m

we substitute

1.80 - (-3.20) = 6.17  × m

5 = 6.17 × m

m = 5 / 6.17

m = 0.8103 kg/mol

so molaity m = 0.8103 kg/mol

we know that

Molaity of solute m = (mass of solute / M.wt of solute) × ( 1 / mass of solvent in Kg)

solve for molar mass of solute

molar mass of solute =  (mass of solute / molaity) × ( 1 / mass of solvent in Kg)

now we substitute

molar mass = (4.28g / 0.8103 kg/mol) × (1 / 0.060kg)

molar mass = ( 5.2839 × 16.66 ) g/mol

molar mass = 88.0297 g/mol ≈ 88.03 g/mol

Therefore molar mass of solute (X) is 88.03 g/mol

Answer:

Invention

Explanation:

Scientific ideas can be applied in novel was to solve new scientific problems and create new technology. This process helps to make life easier and better.

The application of scientific knowledge to solve new problems and create new technology is generally referred to as invention.

Answer:

The density in g/cm3 is 1.9333(put a line above the 3's to show it's repeating).

And no it is not gold because the density of gold in g/cm3 is 19.3.

Explanation:

Divide the mass by the volume in order to get an object's Density.

so, 23.2 divided by 1.20 mm3

=1.93333333 g/cm3

That is the density then you find out the density of gold in grams per cubic centimeter, that is 19.3 g/cm3

For example, gold will always have a density of 19.3 g/cm3; if a mineral has a density other than that, it isn't gold.

Answer:

There will be 3 peaks.

Relative height of the atomic peaks would be; 158, 160 and 162

Explanation:

We are told that Bromine has two isotopes namely 79Br and 81Br in a 1 : 1 ratio (50 : 50).

This means that a compound which contains 1 bromine atom will have two peaks in the molecular ion region but it depends on which bromine isotope is contained in the molecular ion.

Thus;

Relative height of atomic peaks is given by;

m/z = 79Br¯ 79Br+ = 158

79Br¯ 81Br+ = 160

81Br¯ 81Br+ = 162

Answer:

A. 1 J=1kg•m^2/s^2

Explanation:

Energy refers to the capacity to do work. According to the International System of units (SI units), energy is measured in Joules.

Energy is represented by the force applied over a distance. Force is measured in Newton (N) and distance in metres (m). Hence, energy is Newton × metre (N.m)

Newton is derived from the SI units of mass (Kilograms), and acceleration (metres per seconds^2) i.e Kg.m/s^2, since Force = mass × acceleration.

Since; Energy = Newton × metres

If Newton = Kg.m/s^2 and metres = m

Energy (J) will therefore be; Kg.m/s^2 × m

1J = Kg.m^2/s^2

Answer:

Not sure ask Estellia

Explanation:

Answer:

h= 4.9

Explanation:

l x w x h = a

7.66 x 3.75 x h = 141

28.725h = 141

Divide both sides by 28.725 to solve for h.

Answer:

Explanation:

These statements accurately describe the Doppler Effect: It indicates galaxy motion through light wavelengths. It indicates a galaxy moving toward Earth through red shift. I hope this helps.

Answer:

True

Explanation:

Answer:

9.744g of monosodium succinate.

4.925g of disodium succinate.

Explanation:

To find pH of the buffer produced by the mixture of monosodium succinate-Disodium succinate is obtained from H-H equation:

pH = pKa + log ([Na₂Suc] / [NaHSuc])

As you want a pH of 5.28 and pKa is 5.64:

5.28 = 5.64 + log ([Na₂Suc] / [NaHSuc])

-0.36 = log ([Na₂Suc] / [NaHSuc])

0.4365 = ([Na₂Suc] / [NaHSuc]) (1)

As total concentration of the buffer is 100mM = 0.100M:

0.100M = [Na₂Suc] + [NaHSuc] (2)

Replacing (2) in (1):

0.4365 = (0.100M - [NaHSuc] / [NaHSuc])

0.4365 = (0.100M - [NaHSuc] / [NaHSuc])

0.4365 [NaHSuc] = 0.100M - [NaHSuc]

1.4365 [NaHSuc] = 0.100M

[NaHSuc] = 0.0696M

And:

[Na₂Suc] = 0.0304M

As volume of the buffer is 1L:

[NaHSuc] = 0.0696 moles

[Na₂Suc] = 0.0304 moles

Using molar mass of both substances:

Mass of monosodium succinate:

0.0696moles * (140g / 1mol) = 9.744g of monosodium succinate.

Mass of disodium succinate:

0.0304moles * (162g / 1mol) = 4.925g of disodium succinate.

Answer:

the increasing mass number

Answer:

c. The atomic number of the daughter isotope is one more than the parent; the mass numbers are the same

Explanation:

Radioactive decay by beta particle emission involves the emission of an electron.

An electron is a very light particle and its emission does not reflect a loss in mass of the parent molecule. However, the atomic number of the parent molecule increase by one due to the retention of a proton.

Therefore, the daughter isotope has the same mass number as the parent molecule but its atomic number increases by one unit.

An example of beta particle emission is given below;

Th₀(234) ---> Pa₉₁(234) + e₋₁(0)

Thorium₉₀(234) emits a beta particle, e₋₁(0) to give Protactinium₉₁(234)

Answer:

c

Explanation:

Answer:

Explanation:

Growing Peas

Planting depth should be roughly 2 inches with a spacing of about 2 inches apart. Water well at planting and provide at least 1 inch of water per week, particularly during the flowering and pod production stages. As the temperature rises, the vines may need to be deeply watered almost every day.

Make sure to moniter it and change the water depending on how dry or overwatered it looks like. :)

Answer:

The solution is not ideal and shows a positive deviation from Raoult’s law since Psolution (experimental) > Psolution (actual).

Explanation:

Number of moles of CS2 = 3.95g/76.13gmol-1 = 0.0519 moles

Number of moles of acetone = 2.43g/58.08gmol-1 = 0.0418 moles

Total number of moles = 0.0937 moles

Mole fraction of CS2 = 0.0519/0.0937 = 0.5538

Mole fraction of acetone = 0.0418/0.0937 = 0.4461

From Raoult’s law;

PCS2 = 0.5538 × 515 torr = 285.207 torr

Pacetone = 0.4461 × 332 torr = 148.1052 torr

Total pressure = 285.207 torr + 148.1052 torr = 433.3 torr

Answer: An atom is the sub-component of a molecule, or the smallest unit of matter. It is the smallest part an element can divide into. A molecule is made up of atoms that are bound by ionic, covalent or metallic bond.

Answer:

veryy help ful

Explanation:

An atom is the sub-component of a molecule, or the smallest unit of matter. It is the smallest part an element can divide into. A molecule is made up of atoms that are bound by ionic, covalent or metallic bond.

Answer:

Explanation:

There is no way to measure the absolute value of the enthalpy of a substance. Only values relative to an arbitrary reference can be determined.

The reference point for all enthalpy expressions is called the standard enthalpy of formation (ΔHºf). Substances are said to be in the standard state at 1 atm, hence the term “standard enthalpy.” The superscript “°” represents standard-state conditions (1 atm), and the subscript “f” stands for formation. By convention, the standard enthalpy of formation of any element in its most stable form is zero.

For instance, molecular oxygen (O₂) is more stable than the other allotropic form of oxygen, ozone (O₃), at 1 atm and 25°C. Thus, we can write ΔHºf (O₂) 5 0, but ΔHºf (O₃) 5 142.2 kJ/mol.

Based on this reference for elements, we can define the standard enthalpy of formation of a compound as the heat change that results when 1 mole of the compound is formed from its elements at a pressure of 1 atm.

Answer:

This is the enthalpy change that occurs when a compound is formed from its component elements.

Explanation:

This is the enthalpy change that occurs when a compound is formed from its component elements.

Answer:

C. chromium is a metal that is less reactive than sodium.

Explanation:

Hello.

In this case, since chromium is in period 4 group VIB we infer it is a transition metal which slightly reacts with acids and poorly reacts with oxygen and other oxidizing substances. Thus, in comparison with both sodium and potassium which are highly reactive even with water as they get on fire, we can say that it is less reactive than both potassium and sodium, therefore, answer is: C. chromium is a metal that is less reactive than sodium.

Best regards.

Answer:

a) if the solid floats

Explanation:

Hello,

In this case, since the determination of the volume of a solid when submerged in water requires to use an analytical balance to measure the mass, but also it is necessary that the solid sinks in order to completely displace the what in the graduated cylinder which accurately provides the volume of the solid via its scale. Therefore, a draw back is a) if the solid floats since the water is not completely displaced.

Best regards.

Answer:

I believe it's because density is how dense something is. So even if the volume(how much space it takes up in an object) is greater, if the densitity of the object is greater then the density of the water it will sink.

Explanation: