which nonmetqls in the atmosphere and their combinations are essential to life on earth?​

The names of the hydrocarbons are:

Hydrocarbons are named according to the number of carbon atoms and the type of bond between them.

The first step in naming a hydrocarbon is to identify the longest chain of carbon atoms in the molecule, which is called the parent chain

Then, any substituent groups such as methyl or ethyl groups attached to the parent chain are identified and named using prefixes like di-, tri-, or tetra- to indicate how many of that group are present.

Finally, the type of bond between the carbon atoms is indicated by using a suffix, such as -ane for single bonds, -ene for double bonds, and -yne for triple bonds.

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Answer:

because there are other particles to help it move around in the air

To answer this question, we need to know the concentration of the RbOH solution. Without this information, we cannot determine the amount of RbOH present in the 28.3 mL sample.
However, if we assume that the concentration of the RbOH solution is known, we can use the formula:
moles of solute = concentration x volume

To find the number of moles of RbOH in the 28.3 mL sample. From there, we can use the molar mass of RbOH (102.47 g/mol) to calculate the mass of RbOH in the sample.
For example, if the concentration of the RbOH solution is 0.1 M, then:
moles of RbOH = 0.1 M x 0.0283 L = 0.00283 moles
mass of RbOH = 0.00283 moles x 102.47 g/mol = 0.290 g
So, a 28.3 mL sample of a 0.1 M RbOH solution would contain 0.290 g of RbOH.
In summary, the amount of RbOH present in a 28.3 mL sample of a solution depends on the concentration of the solution. Without knowing the concentration, we cannot determine the amount of RbOH in the sample.

complete question not found in the search engine.

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Answer:The oxygen is coming from the atmosphere.

Explanation:

In calculating the theoretical yield of ammonia, the 6/3 done in the second step is to convert moles of hydrogen to moles of ammonia since the mole ratio of hydrogen to ammonia is 3 : 2.

The theoretical yield of a reaction is the maximum amount of product that can be obtained from a given reaction based on the equation of the reaction.

The theoretical yield of a reaction is obtained from the mole ratio of the limiting reagent and the product of the reaction.

Considering the given reaction whose reaction equation is given below:

N₂ (g) + 3 H₂ (g) ---> 2 NH₃ (g)

Hydrogen is given as the limiting reagent:

The amount of hydrogen present 12 g

Moles of hydrogen = 12 g/ 2 g/mol = 6 moles

Mole ratio of ammonia to hydrogen = 3 : 2

Moles of ammonia produced = moles of hydrogen * mole ratio of ammoia to hydrogen

Moles of ammonia = 6 moles * 2/3 moles = 4 moles

Mass of ammonia produced = 4 moles * 17 g/mol

Mass of ammonia produced = 68 g

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Answer:

Number 4 should be physical change since scientists are breaking the water into 2 elements, O₂ and H₂

Answer:

56.67 g of NH₃.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

N₂ + 3H₂ —> 2NH₃

Next, we shall determine the masses of N₂ and H₂ that reacted and the mass of NH₃ produced from the balanced equation. This is illustrated below:

Molar mass of N₂ = 14 × 2 = 28 g/mol

Mass of N₂ from the balanced equation = 1 × 28 = 28 g

Molar mass of H₂ = 1 × 2 = 2 g/mol

Mass of H₂ from the balanced equation = 3 × 2 = 6 g

Molar mass of NH₃ = 14 + (3×1) = 14 + 3 = 17 g/mol

Mass of NH₃ from the balanced equation = 2 × 17 = 34 g

SUMMARY:

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂ to produce 34 g of NH₃

Next, we shall determine the limiting reactant. This can be obtained as follow:

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂.

Therefore, 80 g of N₂ will react with = (80 × 6)/28 = 17.14 g of H₂.

We can see from the calculation made above that a higher mass (i.e 17.14 g) of H₂ than what was given (i.e 10 g) is required to react completely with 80 g of N₂. Thus, H₂ is the limiting reactant and N₂ is the excess reactant.

Finally, we shall determine the maximum mass of ammonia (NH₃) produced from the reaction.

To obtain the maximum mass of NH₃, the limiting reactant will be used because all of it is consumed in the reaction.

The limiting reactant is H₂ and the maximum mass of NH₃ can be obtained as follow:

From the balanced equation above,

6 g of H₂ reacted to produce 34 g of NH₃.

Therefore, 10 g of H₂ will react to produce = (10 × 34)/6 = 56.67 g of NH₃.

Therefore, 56.67 g of NH₃ is produced from the reaction.

This question is incomplete, the complete question is;

In recrystallization from boiling water of benzoic acid contaminated with acetanilide, you begin with an impure sample of 5 grams. If the % composition of the acetanilide impurity in the sample is 6.3 %, what is the minimum amount in mL of solvent (water) required for the recrystallization

Compound      Solubility in water at 25°C      Solubility in water at 100°C

Benzoic Acid      0.34 g/100mL                           5.6 g/100mL

Acetanilide         0.53 g/100mL                           5.5 g/100mL

Answer:

The minimum amount in mL of solvent (water) required for the recrystallization is 91 mL

Explanation:

Given the data in the question;

mass of sample = 5 g

percentage composition of the acetanilide impurity = 6.3%

mass of the acetanilide in impure sample will be;

⇒ 6.3% × 5 g = 0.315 g

Mass of benzoic acid in impure sample;

⇒ 5 g - 0.315 g = 4.685 g

now, solubility in water at 100°C for benzoic acid = 5.6 g/100mL

hence 4.685 g of benzoic acid is soluble in x mL

x = [ 100 mL × 4.685 g ] / 5.6 g

x = 83.66 ≈ 84 mL

Also, solubility in water at 100°C for acetanilide = 5.5 g/100mL

hence 0.315 g of benzoic acid is soluble in x mL

x = [ 100 mL × 0.315 g ] / 5.5 g

x = 5.727 ≈ 6 mL

So, the minimum amount in mL of solvent (water) required for the recrystallization will be;

⇒ 85 mL + 6 mL = 91 mL

The minimum amount in mL of solvent (water) required for the recrystallization is 91 mL

Number of neurons in aluminum is 14

Between atomic number and mass number, there is a discrepancy in the number of neutrons in an atom.

Al has an atomic number of 13 and a mass number of 27.

Neutron count is equal to 27 - 13 = 14

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When hydrogen bromide (HBr) is added to 2-methylbut-2-ene ((CH3)2CCHCH3), an electrophilic addition reaction takes place, where the π bond of the alkene is broken, and the hydrogen and bromine atoms are added to the resulting carbocation.

The reaction proceeds through a Markovnikov addition, where the hydrogen atom attaches to the carbon atom with the greater number of hydrogen atoms.

In this case, the initial addition of HBr to 2-methylbut-2-ene leads to the formation of a primary carbocation, as the positively charged carbon atom only has one alkyl group attached to it. The primary carbocation is relatively unstable, and it can undergo a rearrangement to form a more stable secondary carbocation.

The major product that is typically obtained is the 2-bromo-2-methylbutane. The hydrogen atom from HBr adds to the carbon with three hydrogen atoms (the more substituted carbon), resulting in the formation of a secondary carbocation.

On the other hand, a minor product is also formed, which is 3-bromo-2-methylbutane. This product arises from the addition of HBr to the primary carbocation, which is less stable. Although the primary carbocation is less favored, it can still be formed and lead to the formation of the minor product.

In summary, the addition of HBr to 2-methylbut-2-ene yields two products: the major product is 2-bromo-2-methylbutane, resulting from the addition of HBr to the more stable secondary carbocation, and the minor product is 3-bromo-2-methylbutane, originating from the less stable primary carbocation.

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Answer:

It’s voice and a

Explanation:

Answer:

answer is first one 1 will be less then that of hg coloumn

Answer: Less

Explanation:

Ethane is a non-polar molecule while water is a polar molecule

74.6 kJ

exothermic

has a magnitude that is less than that of B

represents the overall enthalpy of reaction

Answer:

Arrow A:

✔ 74.6 kJ

Arrow B:

✔ exothermic

Arrow C:

✔ has a magnitude that is less than that of B

Arrow D:

✔ represents the overall enthalpy of reaction

Explanation:

edge

fourth period

The third period is similar to the second, except the 3s and 3p sublevels are being filled. Because the 3d sublevel does not fill until after the 4s sublevel, the fourth period contains 18 elements, due to the 10 additional electrons that can be accommodated by the 3d orbitals.

thats very nice lol, things stuck in amber are very cool

The mass of the excess reagent remaining after completion of reaction, given that 8 g of magnesium is heated with 8 g of phosphorous is 0.98 g

First, we shall obtain the mass of the excess reagent that reacted. This is shown below:

6Mg + P₄ -> 2Mg₃P₂

From the balanced equation above,

145.8 g of Mg reacted with 124 g of P₄

Therefore,

8 g of Mg will react with = (8 × 124) / 145.8 = 7.02 g of P₄

Finally, we shall obtain the mass of the excess reagent remaining after the reaction. Details below:

Mass of excess reagent, P₄ remaining = Mass given - mass reacted

= 8 - 7.02

= 0.98 g

Thus, the mass of the excess reagent remaining after the reaction is 0.98 g

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1 Given data :-

• Atoms of gold in gold ring =N= 1.810^24

• 1 mole of any substance contains Avagadro's number of atoms.

• Avagadro's number = NA = 6.02 x 10^23

2. Calculate number of moles :

number of moles (n) = number of atoms (N) / Avagadro's number (NA)

=1.810^24 /6.02 x 10^23

=18/6.02

=2.999

≈3 moles of Au

• This means that a gold ring that contains 1.806 x 1024 atoms of gold (Au) has 3 moles . Option 4 i

Answer:

B.

Explanation:

it's B because 4 x 2 is 8 and we all know 8 x 8 is 64. So the answer is B.

The equation that is correct if the volume of a block is 64 cm³ is 8 cm x 4 cm x 2 cm = 64 cm³. The correct option is B.

Volume is the space occupied by any three-dimensional object. The volume is also considered as the total weight of the object. The volume is calculated as mass is divided by the density.

A block will be a rectangle because it contains length, breadth, and height. The formula will be V = L x B x H

As take all the options, and multiply them, we can calculate the actual volume of the box;

5 cm x 5 cm x 5 cm = 125

8 cm x 4 cm x 2 cm = 64 cm3

5 cm + 5 cm + 5 cm = 15

8 cm + 4 cm + 2 cm = 14

So, the correct option will be B, 8 cm x 4 cm x 2 cm = 64 cm. All others are incorrect.

Thus, the correct option is B.  8 cm x 4 cm x 2 cm = 64 cm.

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Answer:

As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor.

Answer:  238 g of sodium nitrate are needed to make 2.50L of 1.12m solution

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

\(Molarity=\frac{n}{V_s}\)

where,

n = moles of solute

\(V_s\) = volume of solution in L

Now put all the given values in the formula of molality, we get

\(1.12=\frac{\text {moles of}NaNO_3}{2.50}\)

moles of \(NaNO_3\) = 2.8

moles of \(NaNO_3=\frac{\text {given mass}}{\text {Molar mass}}\)

\(2.8mol=\frac{xg}{85g/mol}\)

\(x=238g\)

Thus 238 g of sodium nitrate are needed to make 2.50L of 1.12m solution ​

The most accurate statement regarding a correlation coefficient of 0.60 for two variables Y and X is significantly different from zero. Option A is the correct answer.

A correlation coefficienb of 0.60 indicates a moderate positive relationship between the two variables, which is significantly different from zero. This means that there is a statistically significant association between the two variables, but it does not necessarily indicate a causal relationship or the direction of the relationship between the two variables.

Additionally, the correlation coefficient measures the strength and direction of a linear relationship between two variables, and does not capture non-linear relationships or other types of associations between the variables.

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Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 1.9mole of O\(_2\) will be needed to react with 0.38 mol of C\(_3\)H\(_8\).

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. Stoichiometry represents the number of moles of reactant and products .

The balanced equation for the given reaction can be written as

C\(_3\)H\(_8\) + 5O\(_2\) → 3CO\(_2\) + 4H\(_2\)O

The mole ratio between oxygen and C\(_3\)H\(_8\) is 5:1

1 mole of C\(_3\)H\(_8\)  react with 5 mole of O\(_2\)

0.38 mol of C\(_3\)H\(_8\)  react with 5×0.38 =1.9mole of O\(_2\)

Therefore, 1.9mole of O\(_2\) will be needed to react with 0.38 mol of C\(_3\)H\(_8\).

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Answer:

3P2O5:

P:6 O:15

5CO2

C:5 O:10

3C6H12O6

C:18 H:36 O:18

4C6H12

C:24 H:48

3Mg3(PO4)2

Mg:9 P:2 O: 8

4(NH4)2S

N:8 H:32 S:4

we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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Answer:

The retention factor would be high

Explanation:

The retention factor can be affected by the temperature, or affected by the composition of the solvent, when the FM are liquid.

Heptene is a derivative of the distillation of oil, it is a chemical compound that is made up of seven carbons, that is why it begins with the prefix hept.

X-Ray photons are the energy packets that arise from the atomic electron cloud. When these photons get absorbed they show electronic transitions. Thus, option 3 is correct.

Electronic transitions are defined as the emission and absorption of electromagnetic radiation (X-rays). It results in a change in the energy that is defined by the frequency of the wave.

The transition occurs in various energy levels and shells. It is a molecular-level process that has been due to the absorption of the X-ray photon. This movement of the electron from energy levels produced light and energy.

The ground state of the transition is defined as the lowest energy level that is stable, whereas the excited state is the unstable energy level, where the electron jumps by absorbing the energy. When the electron comes back to the ground level it tends to lose energy and emits light.

Therefore, option 3. electronic transitions is the molecular level process that occurs when an X-Ray photon is absorbed.

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