HELP ME QUICK pleaseeeeeeeeeeeeeeeeee

The molecular formula of the compound containing 81.82% carbon

and 18.18% hydrogen by mass is C₃H₈

From the question given above, the following data were obtained:

Carbon (C) = 81.82%

Hydrogen (H) = 18.18%

Molar mass of compound = 44 g/mol

We'll begin by calculating the empirical formula of the compound. This can be obtained as follow:

Carbon (C) = 81.82%

Hydrogen (H) = 18.18%

Divide by their molar mass

C = 81.82 / 12 = 6.818

H = 18.18 / 1 = 18.18

Divide by the smallest

C = 6.818 / 6.818 = 1

H = 18.18 / 6.818 = 2.67

Multiply by 3 to express in whole number

C = 1 × 3 = 3

H = 2.67 × 3 = 8

Thus, the empirical formula of the compound is C₃H₈

Finally, we shall determine the molecular formula of the compound. This can be obtained as follow:

Molecular formula = Empirical formula × n = molar mass

[C₃H₈]n = 44

[(12×3) + (1×4)]n = 44

[36 + 4]n = 44

40n = 44

Divide both side by 40

n = 44/40

n ≈ 1

Molecular formula = C₃H₈ × n

Molecular formula = C₃H₈ × 1

Therefore, the molecular formula of the compound is C₃H₈

Learn more: https://brainly.com/question/13208888

Answer:

Protein Power

Much of a cell's efforts go toward making proteins. Proteins carry out many important functions in the body. ... Cell organelles must work together to carry out protein synthesis, utilize proteins within the cell, and transport them out of the cell.

The water cycle is the endless process that connects all of that water. It joins the Earth's oceans, land, and atmosphere. The Earth's water cycle began about 3.8 billion years ago when rain fell on a cooling Earth, forming the oceans. ... Precipitation that falls onto land flows into rivers, streams, and lakes.

The water moves from one reservoir to another, such as from river to ocean, or from the ocean to the atmosphere, by the physical processes of evaporation, condensation, precipitation, infiltration, surface runoff, and subsurface flow. In doing so, the water goes through different forms: liquid, solid (ice) and vapor.

- BRAINLIEST answerer

Answer:

Atomic theory is the scientific theory that matter is composed of particles called atoms. Atomic theory traces its origins to an ancient philosophical tradition known as atomism. ... An atom is now defined as the basic particle that composes a chemical element.

Explanation:

Hope i helped

Answer:

B

Explanation:

bias is when you want something to be true so you might ignore evidence to make your conclusion what you want it to be.

The pH of the solution is 10.82.

To solve this problem, we need to determine the concentration of the hydronium ion (\(H_3O^+\)) in the solution. This can be done using the following steps:

Write the balanced chemical equation for the reaction between HBr and CH₃NH₂.

HBr + CH₃NH₂ → CH₃NH₃⁺ + Br⁻

Write the expression for the base dissociation constant (Kb) for CH₃NH₂.

Kb = [CH₃NH₃⁺][OH⁻]/[CH₃NH₂]

Calculate the concentration of hydroxide ions (OH⁻) in the solution using the Kb value and the concentration of CH₃NH₂.

Kb = [CH₃NH₃⁺][OH⁻]/[CH₃NH₂]

4.4 × 10⁻⁴ = x² / (0.400 M)

x = 6.63 × 10⁻³ M

[OH⁻] = 6.63 × 10⁻³ M

Calculate the concentration of \(H_3O^+\) using the equilibrium constant for the reaction between HBr and \(H_2O\).

\(HBr + H_2O = H_3O^+ + Br^-\)

\(Kw = [H_3O^+][OH^-] = 1.0 * 10^{-14}\\[H_3O^+] = Kw/[OH-] = 1.51 * 10^{-11}\)

Calculate the pH using the concentration of \(H_3O^+\).

\(pH = -log[H_3O^+]\\pH = -log(1.51 * 10^{-11})\)

pH = 10.82

For more question on pH click on

https://brainly.com/question/172153

#SPJ11

Answer:

c?

Explanation:

Answer:

Answer:

Number of Significant Figures: 5

The Significant Figures are 3 0 6 7 0

Explanation:

hope this helps

Answer:

4.69 x 10²⁴ molecules CH₄

Explanation:

To find the amount of molecules, you need to (1) convert grams to moles (via molar mass) and then (2) convert moles to molecules (via Avogadro's Number). It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs to match the sig figs of the given value (125 g).

Molar Mass (CH₄): 16.05 g/mol

Avogadro's Number:

6.022 x 10²³ molecules = 1 mole

125 g CH₄         1 mole            6.022 x 10²³ molecules
----------------  x  ---------------  x  -------------------------------------  =  
                          16.05 g                       1 mole

=  4.69 x 10²⁴ molecules CH₄

Answer:

1. The compound in medicines should be nonpolar because of many reasons.  First off, it is important for any drug to be able to dissolve itself through the cell membrane which consists of a lipid bi-layer, in order perform its function. Non polar compounds are lipid soluble and can dissolve in the lipid layers. Polar compounds are water soluble and cannot cross the cell membrane. Because of this, scientists need to be sure of using compounds that are nonpolar in nature so they are able to pass through the cell membrane and enter into the blood circulation of the body and perform its function.

2. You need to think about the polarity of the dressing in order for it to turn out well because the different ingredients inside the dressing have to be able to dissolve or mix together well or else the consistency will be clumpy or separated. With polarity only, like-polarities dissolve like-polarities. So you must make sure that all your ingredients are polar or all are nonpolar. If you have some ingredients that are polar and some that are nonpolar, the dressing won’t turn out smooth like you want it to.

Explanation:

ap*x

Answer:

GOD BLESS THE GUY ABOVE THANK YOU!!!

Explanation:

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

For more such questions on equilibrium, click on:

https://brainly.com/question/517289

#SPJ8

Answer:

group 18 has 8 valence electrons, that's why they are stable.

8!

Explanation:

You're looking at the very last column, right? Noble gases are known for their stability because their valence shells are full! Lucky for you, all you have to do to know the number of valence electrons is look at the column number and take ignore the 1! 16 becomes 6, 18 becomes 8.

Answer:

that's a good question but I'm not too sure

Answer:

the total setup time of this process is 100 minutes

Explanation:

Given the data in the question;

Vat holds up to 1000 gallons;

Rate of chemical agents being added to the vat = 4.5 gpm

Reaction time = 85 minute

cleaning ( waiting time ) 15 minute

the setup time of this process = ?

To calculate the setup time for this process, we simply say;

the setup time = Reaction time + cleaning ( waiting time )

so we substitute in our values

the setup time = 85 mins + 15 mins

the setup time = 100 minutes

Therefore, the total setup time of this process is 100 minutes

Answer:

12 mol CO₂

General Formulas and Concepts:

Atomic Structure

Stoichiometry

Explanation:

Step 1: Define

Identify

[rxn] 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

[Given] 2 mol C₆H₁₂O₆

[Solve] mol CO₂

Step 2: Identify Conversions

[rxn] 6CO₂ → C₆H₁₂O₆

Step 3: Convert

a- At the bottom of the trough, you will observe crystal formation of copper sulfate as the water evaporates. The crystals will continue to grow until there is no more water left to evaporate.

b- Crystallization has several benefits in various fields. In the chemical industry, it is used to purify substances by removing impurities and separating mixtures. In pharmaceuticals, it is used to purify drugs and create more effective and stable formulations. In metallurgy, it is used to extract pure metals from ores. Crystallization can also be used in the food industry to create high-quality products such as chocolates and candies with a smooth texture and uniform appearance.

Overall, crystallization is a useful technique for obtaining pure substances and for creating well-defined crystals with desirable properties. It allows for the separation and purification of mixtures and can lead to the production of higher quality products in various industries.

Based on the data provided, there are 25 g of calcium carbonate in 1.505 × 10^23 atoms.

The mole of a substance can be calculated as follows:

Moles of calcium carbonate = 1.505 × 10^23/6.02 × 10^23

Moles of calcium carbonate = 0.25 moles

The mass of calcium carbonate in 0.25 moles is calculated as follows:

molar mass of a calcium carbonate = 100 g/mol

mass of calcium carbonate = 0.25 × 100 = 25 g.

Therefore, there are 25 g of calcium carbonate in 1.505 × 10^23 atoms.

Learn more about molar mass and mass at: https://brainly.com/question/15476873

Answer:

6 N to the left, or -6 N
unbalanced

Explanation:

The forces are two 3 N forces. The forces are additive, so 3+3 = 6, so the answer is 6 N to the left.
Since the net force isn't 0, the forces are unbalanced (aka the block will move since there is a force pushing the block)

Answer:

The correct answer to the following question will be "90.6 kJ/mol".

Explanation:

The total reactant solution will be:

\((31.8 \ mL+68.9 \ mL)\times 1.07\ g/mL = 107.74 \ g\)

The produced energy will be:

\(=4.18 \ J/(gK)\times 107.74 \ g\times (28.2-25.0)K\)

\(=450.35\times 3.2\)

\(=1441.12 \ J\)

The reaction will be:

⇒  \(HCl+NaOH \rightarrow NaCl+H_{2}O\)

Going to look at just the amounts of reactions with the same concentrations, we notice that they're really comparable.  

Therefore, the moles generated by NaCl will indeed be:

=  \((\frac{31.8}{1000} \ L)\times (0.500 \ M \ HCl/L)\times \frac{1 \ mol \ NaCl}{1 \ mol \ HCl}\)

=  \(0.0318\times 0.500\)

=  \(0.0159 \ mole \ of \ NaCl\)

Now,

=  \(\frac{1441.12 \ J}{0.0159 \ moles \ NaCl}\)

=  \(906364.7\)

=  \(90.6 \ KJ/mol \ NaCl\)

Answer

Copper

Explanation

The ground state electron configuration for copper is [Ar] 3d104s1.

Explanation:

2x²=8

x²=8/2

x=√4

x=2

hope it helps.

Answer:

\(\huge \fbox \pink {A}\huge \fbox \green {n}\huge \fbox \blue {s}\huge \fbox \red {w}\huge \fbox \purple {e}\huge \fbox \orange {r}\)

\( {2x}^{2} = 8 \\ {x}^{2} = \frac{8}{2} \\ {x}^{2} = 4 \\ x = \sqrt{4} \\ x = 2\)

ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

\( \huge\purple{ \mid{ \underline{ \overline{ \tt ꧁❣ ʀᴀɪɴʙᴏᴡˢᵃˡᵗ2²2² ࿐ }} \mid}}\)

Answer:

The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction.

For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.

Another example, solar panels don't create solar energy. They harness energy from the sun and transform it into another type of energy (electricity).

D. a bond between two atoms that have equal electronegativities

Covalent bonds involve 2 atoms sharing electrons.

Covalent Bonds

There are 3 types of bonds: metallic, ionic, and covalent. Metallic bonds occur between 2 metals that exist in a "sea of electrons." Ionic bonds have high electronegativity differences and occur between a metal and a nonmetal. Finally, as stated above, covalent bonds occur when 2 atoms share their electrons. Covalent bonds usually occur between two nonmetals. However, there are 2 types of covalent bonds: polar and nonpolar.

Nonpolar Bonds

Both polar and nonpolar bonds involve the sharing of electrons; however, polar bonds share electrons unequally. This is caused by an electronegativity difference greater than 0.5. When two atoms have equal electronegativities, they share the electrons equally. This creates a nonpolar bond.  

There are 3.4 milliliters of the active ingredient in the cough syrup bottle.

To calculate the volume of the active ingredient in the cough syrup bottle, we need to multiply the total volume of the bottle by the percentage of the active ingredient.

Given:

Total volume of the bottle = 68.0 mL

Percentage of active ingredient = 5.00%

First, we convert the percentage to a decimal by dividing it by 100:

Percentage of active ingredient = 5.00% = 5.00/100 = 0.05

Next, we calculate the volume of the active ingredient:Volume of active ingredient = Total volume of the bottle × Percentage of active ingredient

Volume of active ingredient = 68.0 mL × 0.05

Volume of active ingredient = 3.4 mL

Therefore, there are 3.4 milliliters of the active ingredient in the cough syrup bottle.

It's important to note that the calculation assumes a homogeneous distribution of the active ingredient throughout the solution.

For more such questions on  cough syrup visit:

https://brainly.com/question/2970281

#SPJ8

The mass concentration of sand in the ethanol solution is 0.299 g/dm³.

To find the concentration in grams per cubic decimeter (g/dm³), we first need to convert the volume from liters to cubic decimeters (dm³). Since 1 liter is equal to 1 cubic decimeter, we can directly convert the volume.

Given:

Mass of sand = 0.2 g

Volume of ethanol = two-thirds liter

Converting volume to dm³:

1 liter = 1 cubic decimeter

two-thirds liter = (2/3) cubic decimeter = 0.67 dm³ (rounded to two decimal places)

Now we can calculate the concentration in g/dm³ by dividing the mass of sand by the volume in dm³:

Concentration = Mass / Volume

Concentration = 0.2 g / 0.67 dm³

Concentration ≈ 0.299 g/dm³ (rounded to three decimal places)

Learn more about mass concentration at: https://brainly.com/question/23437000

#SPJ1

The correct response is A) The change in gaseous moles n g must be largest, indicating the formation of more gaseous products, which enhances unpredictability and, hence, entropy positive.

Entropy increases as a substance transitions from a solid to a liquid to a gas, and by observing the phases of the reactants and products, you can determine if an entropy change is positive or negative. Entropy will rise once the number of gas moles increases. The environment's negative entropy change is significantly outweighed by the system's positive entropy change. We can see that the system's entropy change is positive.

To learn more about positive  please click on below link

https://brainly.com/question/12650352

#SPJ4

Answer: The answer is incus

Answer:

There will be 216,000 energy transfer reactions

90  \(O_{2}\) molecules will be formed

Explanation:

since 2400 chlorophyll molecules = ( 1 ) \(O_{2}\) molecule

hence there will be 8 photons  absorbed in this process

for 720 absorbed photons

The number of \(O_{2}\) molecules formed = 720 / 8 = 90 molecules of \(O_{2}\) molecule formed

Total number of resonance energy transfer reactions

( 1 ) \(O_{2}\) molecule = 2400 molecules

 hence 90 molecules of \(O_{2}\)

= 2400 molecules * 90 molecules

= 216000 energy transfer reactions

The liquid substance used in the laboratory for dissolving dry mortar on floor flies is hydrochloric acid.

Hydrochloric acid is a strong acid that can dissolve many materials, including dry mortar.

Hydrochloric acid also known as muriatic acid or sulfuric acid, are commonly used to dissolve hardened mortar or concrete residues.

To use hydrochloric acid to dissolve dry mortar, you will need to mix the acid with water in a ratio of 1 part acd to 10 parts water.

You should then apply the mixture to the dry mortar using a brush or spray botle.

Find more exercises on Hydrochloric acid;

https://brainly.com/question/24784580

#SPJ1

The mass of NaHCO₃ needed to generate 0.261 mole of CO₂ is 21.93 grams

First, we shall obtain the number of mole of NaHCO₃ that reacted. Details below:

NaHCO₃ + HCl -> NaCl + H₂O + CO₂

From the balanced equation above,

1 mole of CO₂ was obtained from 1 mole of NaHCO₃

Therefore,

0.261 mole of CO₂ will also be obtain from 0.261 mole of NaHCO₃

Finally, we shall detemine the mass of NaHCO₃ needed. Details below:

Mole = mass / molar mass

0.261 = Mass of NaHCO₃ / 84.01

Cross multiply

Mass of NaHCO₃ = 0.261 × 84.01

Mass of NaHCO₃ = 21.93 grams

Thus, we can conclude that the mass of NaHCO₃  needed is 21.93 grams

Learn more about mass:

https://brainly.com/question/21940152

#SPJ1