A reading before and after was taken from a burette, as shown.

What is the reading of the burette on the left, in mL? Do not type in units.

Im having a hard time reading the numbers on the left picture

Answer:

Kp = P (N₂) . P³ (H₂)  /  P² (NH₃)

Explanation:

The reaction for the decomposition of ammonia is given by;

2NH₃ (g) ⇌ N₂ (g) + 3H₂ (g)

The pressure equilibrium constant gives the ratio of the pressure of the product over reactants for a reaction that is at equilibrium.

The pressures of the species are raised to the powers of their respective coefficients.

In this reaction;

Products =  N₂ (g) + 3H₂ (g)

Reactant = 2 NH₃ (g)

The pressure equilibrium constant (Kp) is given as;

Kp = P (N₂) . P³ (H₂)  /  P² (NH₃)

Answer:

See Explanation ...

Explanation:

        2AgNO₃(aq)    +    Na₂S(aq) => 2NaNO₃(aq) + Ag₂S(s)

given  2.0g                        2.5g          Spec Ions       Driving Force ppt

= 2.0g/169.8g·mol⁻¹        =2.5g/78g·mol⁻¹

= 0.012mol                      =0.032mol

0.012/2=>0.006*              0.032/1=>0.032*

Limiting Reactant => *Dividing moles by respective coefficient => Limiting Reactant is the smaller resulting value. Therefore AgNO₃ is the Limiting Reagent

Theoretical Yield of ppt Ag₂S(s) = 1/2(0.012 mol) = 0.006 mol Ag₂S(s) = 0.006mol(246g·mol⁻¹ ) = 1.48g Ag₂S(s)

%Yield = (Lab Yield/Theoretical Yield) x 100% = (1.25g/1.48g)100% = 84%

Reagent in Excess => Na₂S(aq) => 0.032mol is given but only 0.016mol is consumed in the reaction. That is, (0.032 - 0.016)mol = 0.016mol  Na₂S(aq) remains in excess = (0.016mol)(78g·mol⁻¹) = 1.25g Na₂S(aq) in excess.

Answer: The religious fanaticism of Aurangzeb overshadowed his virtues. His reversal of Akbar's policy of religious toleration resulted in weakening the entire structure of the Mughal empire. It led to several conflicts and wars in different parts of the country.

Answer:

A molecule is a group of two or more atoms that form the smallest recognizable unit into which the structure and chemical properties of that substance can be divided and preserved by a pure substance.

Explanation:

Answer:

17. Yes, it represents a chemical reaction. This is because new substances were formed from the original substance.

18. (a) Formation of new substances

(b) Evolution or absorption of large quantity of heat

(c)Change in mass of substances

Explanation:

17. In the model above, molecules of a compound of carbon and hydrogen (molecular formula is C2H6) combines with molecular oxygen (O2) to produce two new substances; a compound composed of two oxygen atoms and one carbon atom (CO2) and another compound composed of two atoms of hydrogen and one atom of oxygen (H2O). Since the new substances formed are completely different from the original substances, it a chemical reaction. Also, a large volume of heat would have been given off.

18. To determine if a chemical reaction has occurred, the following observations can be looked out for.

a. Formation of new substances different entirely from the original substances

b. Evolution or absorption of large quantity of heat during the change. Check whether the vessel containing the substances gets hotter or colder.

c. Change in mass of substances. Since new substances are formed in a chemical reaction, there is usually a significant change in mass of the products and reactants.

[tex]\huge\boxed{3.2 Grams}[/tex]

Moles is the unit which measures the amount of substance in the System International (SI). A mole is the amount of substance that contains the same amount of substance as the amount of substance exactly in exactly 12 g of carbon-12. C-12 is the standard to measure moles.

I have attached the Equations for moles.

For this question we will use the formula,

                                      [tex]Moles = \frac{Given Mass}{Atomic Mass}[/tex]

Rearrange the equation,

                                      [tex]Mass = (Moles)x(Atomic Mass)[/tex]

Given:

          Moles = 0.2

          Molecular Mass of Oxygen Atom(Not molecule) = 16

Thus,

                                        [tex]Mass = (0.2)x(16)\\\\Mass = 3.2 grams[/tex]

The mass of 0.2 moles of oxygen atom is 3.2 grams.

Answer:

The amount of solar panel covered​

Explanation:

The variable that is the independent one is the one that Jasmine is changing. In this case, it is the amount of solar panel covered, via a piece of paper.

Answer:

D: The amount of solar panel covered

Explanation:

Answer:

Because i want to. would be the reply

Explanation:

VOTE ME BRAINLIEST PLSSSSSSSSS

Answer:

none of the above

option d

In every 100g of that compund there is 50.84 g of C, 8.53 g H and (100-59.37) g = 40.63 g of O.

Step 1: Convert each element's mass in moles. To do that we need to divide each element's mass by their respective molar mass.

For Carbon.

[tex]C = \frac{50.84}{12} = 4.24 mol [/tex]

For Hydrogen.

[tex]H = \frac{8.53}{1} = 8.53 mol [/tex]

For Oxygen.

[tex]O = \frac{40.63}{16} = 2.54 mol [/tex]

Step 2: Divide each of the numbers by the smallest number.

For Carbon.

[tex]C = \frac{4.24}{2.54} = 1.7 [/tex]

For Hydrogen.

[tex]H = \frac{8.53}{2.54} = 3.36 [/tex]

For Oxygen.

[tex]O = \frac{2.54}{2.54} = 1 [/tex]

Step 3: So the empirical formula will be.

[tex] C_{1.7} H_{3.36} O_1 [/tex]

But using decimal will be messy. So we multiply the numbers by 3. The right empirical formula will be.

[tex] C_{5} H_{10} O_3 [/tex]

The empirical formula of an organic compound that contains 50.84% C, 8.53% H, and the rest oxygen is C₅H₁₀O₃.

First, we have to determine the mass percentage of oxygen, knowing that C, H and O amount to the 100% of the compound.

[tex]C + H + O = 100\%\\O = 100\% - C - H\\O = 100\% - 50.84\% - 8.53\% = 40.63\%[/tex]

Then, we divide each mass percentage by the atomic mass of the element.

[tex]C: 50.84/12.01 = 4.23\\H: 8.53/1.01 = 8.45\\O: 40.63/16.00 = 2.54[/tex]

Afterwards, we divide all the numbers by the smallest one, i.e. 2.54.

[tex]C: 4.23/2.54 = 1.66\\H: 8.45/2.54 = 3.33\\O: 2.54/2.54 = 1[/tex]

Finally, we multiply all the numbers by 3, so that they are all integers.

[tex]C: 1.66 \times 3 \approx 5\\H: 3.33 \times 3 \approx 10\\O: 1 \times 3 = 3[/tex]

The empirical formula of the organic compound is C₅H₁₀O₃.

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Answer:

vb

Explanation:

b

Answer:

photosynthesis

Explanation:

A.ketone

R-CO-R

B.aldehyde

R-CH=O

c.carboxylic acid

R-COOH

d.ester

R-CO-O-C-R

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{2.3 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 38.20598...[/tex]

We have the final answer as

Hope this helps you

Answer:

560 mph East

Explanation:

Velocity is just speed with direction pretty much.

Answer:

4

Explanation:

Because of single replacement the ideal shape comes in form

Answer:

The oxidation number of sulphur in is +2

Explanation:

S2O3 2-

2 (S) + 3(O)=-2

2 (S) + 3(-2)=-2

2 (S) + (-6) =-2

2 S = +4

S= +2

Answer:

C               (I think)

Explanation:

the levels are higher than they have ever been

Answer:

1.Reactivity

2.combustibility

3.Shape

Hope this helps,

If you think I am right please give brainliest

Happy Holidays!

Explanation:

Answer:Multiple the moles of Na2 SO4 that you found just

Explanation:

Ions are formed by gaining and donating the valence electrons from the outer shells. Sodium has an extra electron and forms cations. In 1.5 grams of Na⁺, there are 0.0652 moles ions.

Cations are said to be the ions that are formed by donating electrons from their valence shell. They tend to donate their electrons to form ionic bonds with another atom that accepts the electrons.

The mass and the molar mass of the cation can be used to calculate the number of moles contained in the atom or the ion.

Given,

Mass of sodium ions = 1.50 grams

The molar mass of sodium ions = 22.98 amu

The number of moles of sodium cation is calculated as:

Moles (n) = mass ÷ molar mass

n = 1.50 ÷ 22.98

= 0.0652 moles

Therefore, 0.0652 moles are present in 1.50 grams of sodium ions.

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Answer:

Here you go!!

Explanation:

Answer:

What ever the other person said

Explanation:

Answer: d. the distance between two rarefactions,

Explanation:

Wavelength is the distance between two identical adjacent points in a wave. This means that it is the distance between two adjacent compressions or two adjacent rarefactions.

Wavelengths are inversely related to frequency because the longer the wavelength, the less the number of wave cycles per second.

Answer:

5.37 L

Explanation:

To solve this problem we need to use the PV=nRT equation.

First we calculate the amount of CO₂, using the initial given conditions for P, V and T:

1.03 atm * 4.80 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 291.16 K

We solve for n:

Then we use that value of n for another PV=nRT equation, where T=37 °C (310.16K) and P = 745 mmHg (0.98 atm).

And we solve for V:

Answer:

its -3,811.92 aka.) A

Explanation:

The overall enthalpy of the reaction is represented in the graph by the letter A. The activation energy is represented by the letter B and the activated complex is represented by C.

The energy diagram of a reaction represents the energy change with respect to the rate of the reaction. It clearly depicts the energy profile of reactants and products, transition state of the reaction, activation energy and the overall enthalpy of the reaction.

The given diagram represents the energy profile for the photosynthetic reaction. The state with the highest activation energy is called transition state of the reaction. The minimum energy that must be acquired by the reactants to overcome the barrier potential is called activation energy.

For the given graph, the activation energy is represented by the letter B. The overall enthalpy of the reaction is represented in the graph by the letter A and the activated complex is represented by C.

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Your question is incomplete. But your complete question probably was:

Letter__shows the overall enthalpy of reaction.

Letter___shows the activation energy for the reaction

The activated complex is represented by

Answer:

synthesis

Explanation:

hope this helps

The given reaction is a type of synthesis reaction.  

• The reactions, which takes place when two distinct molecules or atoms associate to produce a distinct molecule or compound is known as synthesis reactions.  

• The synthesis reactions are one of the prime categories of chemical reactions that comprise combustion reactions, single displacement, and double displacement reactions.  

• In synthesis reactions, energy is released and the reaction is exothermic, in some cases, endothermic is also possible.  

• In the given reaction atoms of phosphorus and oxygen combines to produce the compound phosphorus oxide.

Thus, the given case is an example of synthesis reaction.

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441 g CaCO₃ would have to be decomposed to produce 247 g of CaO

Reaction

Decomposition of CaCO₃

CaCO₃ ⇒ CaO + CO₂

mass CaO = 247 g

mol of CaO(MW=56 g/mol) :

[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{247}{56}\\\\mol=4.41[/tex]

From equation, mol ratio CaCO₃ : CaO = 1 : 1, so mol CaO :

[tex]\tt \dfrac{1}{1}\times 4.41=4.41[/tex]

mass CaCO₃(MW=100 g/mol) :

[tex]\tt mass=mol\times MW\\\\mass=4.41\times 100\\\\mass=441~g[/tex]

Answer:

4.289 mol

Explanation:

Given that the molar mass of HBr (known as Hydrobromic Acid or Hydrogen Bromide) has a molar mass of 80.91 g/mol.

To find the number of moles, we have the formula

(Grams of the substance ÷ moles of the substance) * (molar mass of the substance in grams ÷ one mol)

Here the Grams of the substance = 347grams,

Moles of the substance =?

Molar mass of the substance = 80.91 g/mol

By cross multiplying, we have

347 grams * 1 mol = Z * (80.91)

Z = 347 grams ÷ 80.91g/mol

Z = 4.289 mol

Answer:

When hydrogen is subjected to large enough pressure, it solidifies according to theory.

Explanation:

According to theory, when  hydrogen molecules are subjected to enormous degree of pressure the molecules will solidify.

What happens here is that the hydrogen–hydrogen bonds in the hydrogen molecule will break apart and the molecules collapses into hydrogen atoms.

Hence, when hydrogen is subjected to large enough pressure, it solidifies according to theory.