i have a question can someone answer these questions for me please?

Answer:

empirical formula is C6H12O3

Explanation:

A sample of a compound is decomposed in the laboratory and produces

72.1 g carbon, 12.1 g hydrogen, and 48.0 g oxygen. Calculate the empirical formula of the compound.

divide the gm by the atomic mass and ratio the results

C=72.1/12.01 =6.00

H = 12.1/1.01 = 11,98 =~12

O =48.0/16 = 3

empirical formula is C6H12O3

Answer: phosphoric acid, H3PO4 (gives pop a tart taste)

% O: 1 mol H3PO4 (4 mol O / 1 mol H3PO4) (16 g / 1 mol O) = (64 g O / 98 g H3PO4) x 100 = 65.3%

% P: 1 mol H3PO4 (1 mol P / 1 mol H3PO4) (31 g / 1 mol P) = (31 g P / 98 g H3PO4) x 100 = 31.6%

Answer:

1. Never leave the gas cartridge in the stove when you’re not using it.

2. Always wait until the stove cools down before you remove the gas cartridge.

3. Always try to store gas cartridges and camping stoves in a dry place

4. Clean your stove each time you have used it because it needs to be clean in order to perform at its best.

Answer:

Lead is added to warm dilute nitric acid. When the carbonate has reacted with the warm acid, more carbonate is added until the carbonate is in excess.

Explanation:

Answer:

Nitric acid is used for the production of ammonium nitrate, a major component of fertilizers. It is also used for producing explosives like nitroglycerin and trinitrotoluene (TNT) and for oxidizing metals.

Explanation:

Answer:

The answer is D.

Explanation:

The number of mole in the container at 1.8 atm with a temperature of 270 K is 0.162 mole.

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

Gas constant (R) = 0.0821 atm.L/Kmol

Volume (V) = 2 L

Pressure (P) = 1.8 atm

Temperature (T) = 270 K

Using the ideal gas equation, we can obtain the number of mole in the container as illustrated below:

1.8 × 2 = n × 0.0821 × 270

3.6 = n × 22.167

Divide both side by 22.167

n = 3.6 / 22.167

Therefore, the number of mole in the container is 0.162 mole

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Answer:

C. the crust breaks into large chunks to form a series of sharp peaks

Explanation:

plates are extremely thin and they can either collide and fuse or simply break. This causes mountains like the Alps and may cause volanic explosions as well.

https://www.nps.gov/subjects/geology/plate-tectonics-collisional-mountain-ranges.htm <- this article may be of interest to you.

The crust breaks into large chunks to form a series of sharp peaks. This describe characteristics of folded mountains. Therefore, the correct option is option C.

Mountains that have been folded are a result of compressive forces produced by endogenetic forces that originate inside the earth. These mountains, which may be found on all continents, are the tallest and largest in the globe.

Folded mountains are distributed throughout the world in a pattern that indicates that they are typically located along the edges of the continents, either in a north-south or an east-west direction.  The crust breaks into large chunks to form a series of sharp peaks. This describe characteristics of folded mountains.

Therefore, the correct option is option C.

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Answer:

Joints are movable connections between two bones. ... It provides a smooth surface to stop the bones in the joint from rubbing against each other too much. The cartilage passes the pressure in the joint on to the bone underneath it. This is especially important in joints that bear heavier loads, such as hip or knee joints

Explanation:

Explanation:

Principal quantum number=n=7

Azimuthal quantum number=l:-

[tex]\\ \sf\longmapsto n-1[/tex]

[tex]\\ \sf\longmapsto 7-1[/tex]

[tex]\\ \sf\longmapsto \ell=6[/tex]

The maximum value of the secondary quantum number (l) allowed for atomic electrons with a principal quantum number n = 7 is 6.

The term quantum number is used to describe the set of numbers that describe the position of an electron in an atom. Now we know that the secondary quantum number (l) have values from zero to n - 1.

Hence, the maximum value of the secondary quantum number (l) allowed for atomic electrons with a principal quantum number n = 7 is 6.

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By balancing the equation, it is obtained that 2 moles or 196 g of H₃PO₄ is required to react with 3 moles or 514.02 g of Ba(OH)₂. Thus, 0.685 g of H₃PO₄ reacts with 1.796 g Ba(OH)₂. The molarity of 1.796 g of Ba(OH)₂ in 46 ml is 0.217 molar.

Molarity of a solution is the ratio of the number of moles of solute to the volume of solution in liters. Molarity is the common term used to represent the concentration of the solution.

The balanced equation of the given reaction is written as:

[tex]\rm 2 H_{3}PO_{4} + 3Ba(OH)_{2} \rightarrow Ba_{3}(PO_{4})_{2} + 6H_{2}O[/tex]

As per this reaction, 2 moles of H₃PO₄ reacts with 3 moles of Ba(OH)₂.

Molar mass of  H₃PO₄  = 98 g/mol

2 moles = 2 × 98 = 196 g.

molar mass of Ba(OH)₂ = 171.3 g/mol

3 moles = 171.3 × 3 = 514.0 g.

The mass of Ba(OH)₂ produced from 0.685 g of H₃PO₄ is calculated as follows:

= (0.685 × 514 g) /196 g

= 1.796 g.

Number of moles of 1.796 g of Ba(OH)₂ = 1.796 g/ 171.3 g/mol = 0.010 mol

The volume of the solution is 46 ml or 0.046 L. Thus, molarity of the solution is = no.of moles/volume in L

                 = 0.010 moles/ 0.046 L

                 = 0.217 M.

Therefore, the molar concentration of Ba(OH)₂ is 0.217 M.

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Answer:

Multiply the molar amount by Avogadro's number.

Explanation:

Answer: Cellular Respiration

Explanation: Is the process in which the cells of living things break down the organic compound glucose with oxygen to produce carbon dioxide and water. The overall chemical equation for cellular respiration is:

C6H12O6 + 6O2 → 6CO2 + 6H2O + energy (stored in ATP)

Cellular respiration takes place in the cells of all organisms. It occurs in autotrophs such as plants as well as heterotrophs such as animals.

Answer:

0.4 mol

Explanation:

We will use the formula:

n = cv

n is the number of moles, c is the concentration/molarity, v is the volume in LITRES.

Step 1: convert the volume to Litres. 500 mL is 0.5 Litres

Step 2: apply the formula

n= (0.8)(0.5)

n = 0.4 mol

3.5 moles of a gas will occupy 2.7 L at 1.5 atm at a temperature of 14.1K

IDEAL GAS LAW:

PV = nRT

Where;

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Answer:

If it is 20 N and 50 N then, the net force would be 70 N if they are on the same side

Explanation:

Are they on the same side?

Answer:

Accumulation is something that's building up. For example, "My trash accumulates every Saturday."

A precaution that needs to be taken for working with the nucleophilic medium is ensuring the stability of the carbonation intermediate formed and Steric hindrance.

Discussion:

The likelihood of a nucleophilic substitution reaction proceeding by a dissociative mechanism depends to a large degree on the stability of the carbocation intermediate that forms.

Steric hindrance: Reactions where nucleophiles attack carbon-based electrophiles are significantly more sensitive to steric effects, because empty orbitals on carbon are not as accessible.

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Answer:

Avogadro's number is an absolute number: there are 6.022×1023 elementary entities in 1 mole. This can also be written as 6.022×1023 mol-1. The mass of one mole of a substance is equal to that substance's molecular weight.

Answer:

A more dense plate going underneath a less dense plate.

Answer:

the answer should be d I'm pretty sure.

Answer:

2NaOH + H₂SO4 -> Na2SO4 + 2H2O

Explanation:

NaOH + H₂SO4 -> Na2SO4 +H2O

2NaOH + H₂SO4 -> Na2SO4 + 2H2O

Answer:

2NaOH + H₂SO4 -> Na2SO4 + 2H2O

Explanation:

2*H+2H=2*2H

2*Na=Na2

2*O+O4=O4+2*O

s=s

Answer:

i cant but ask awadtameem for help

Explanation:

NaOH reacts with benzoic acid to form sodium benzoate therefore, aqueous NaOH is a bad choice for the recrystallization of benzoic acid.

Recrystallization is a process of obtaining a pure solute by dissolving a solute in a solvent at high temperature and cooling the solution rapidly so that the pure solute can crystallize out of solution.

It is important to note that the solute must not react with the solution from which it is to be recrystallized. Unfortunately, NaOH reacts with benzoic acid to form sodium benzoate therefore, aqueous NaOH is a bad choice for the recrystallization of benzoic acid.

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In this case, it can be see that we have a gas mixture wherein hydrogen has a partial pressure of 0.545 bar, nitrogen 0.517 bar and argon 0.107 bar and we are asked to calculate the mole fraction of each gas.

According to the given information, it turns out possible for us to use the Dalton's law in order to calculate the mole fraction of each gas in the mixture. However, we first must calculate the total pressure of the mixture by adding them all together:

[tex]P_T=0.545bar+0.517bar+0.107bar=1.169bar[/tex]

After so, we proceed to the mole fractions by dividing the pressure of each by the total one:

[tex]x_{H_2}=\frac{0.545bar}{1.169bar} =0.466\\\\x_{N_2}=\frac{0.517bar}{1.169bar} =0.442\\\\x_{Ar}=\frac{0.107bar}{1.169bar} =0.092[/tex]

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Regards!

The pH meter brand B is the most accurate pH meter as compared to other pH meter.

I will suggest the pH meter brand B the lab to purchase because the readings of this pH is more accurate as compared to other three pH meters. The pH meter brand B provides data which is closer to the known pH of the solution.

While on the other hand, pH meter brand A, C and D gives less accurate data in which more error is present in the data so we can conclude that the pH meter brand B is the most accurate pH meter as compared to other pH meter.

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Answer:

Explanation:

First you need to calculate the mole of substance and then from the molarity the volume of the substance.

note: don't forget to convert volume liter mL in molarity.

Answer: 2 meters

Explanation: 200 cm of flower bed

There are 100 cm in one meter.

200/100=2

Answer:

200 centimeters or 2 meters

Explanation:

It should be the same simply for aesthetic pleasure

Answer:

C and D

Explanation:

The answer is C and D