Help me please im stuck

Answer:

chemical change i think

Explanation:

As the drops of vinegar fall through the oil to the bottom of the bottle, it reacts with the baking soda to make carbon dioxide gas. These bubbles attach themselves to the colored vinegar and cause them to float to the surface. When the bubbles pop, the color sinks back to the bottom of the bottle.

Given the pressure in KPa, the value of the pressure reading in torr obtained is 20.73 torr

101.325 KPa = 760 torr

The value of the pressure in torr can be obtained as illustrated below:

101.325 KPa = 760 torr

Therefore,

2.76324 KPa = (2.76324 × 760) / 101.325

2.76324 KPa = 20.73 torr

Thus, 2.76324 KPa is equivalent to 20.73 torr

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If a geologist drips a small amount of vinegar (acetic acid) onto a sample of dolomite, fizzing will occur because carbon dioxide is produced.

Effervescence observes whenever any gas tried to escape out from an aqueous solution, that's why CO₂ show effervescence.

Reaction between dolomite and acetic acid will be represented as:

MgCO₃ + 2CH₃COOH → CO₂ + H₂O + Mg(CH₃COO)₂

From the above reaction it is clear that carbon dixide gas is produced by showing the effervescence and fizzing behavior.

Hence, option (2) is correct.

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Answer:

B

Explanation:

on edge2022

Answer:

Well, by definition,

molarity = moles of solute

               volume of solution

Explanation:

Now the moles of solute are a constant. The volume of solution MAY change substantially with increasing or decreasing temperature. In some calculations molality is used in preference, which is defined by the quotien

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Answer:

Specific chemical sugar glucose

Explanation:

When we say “blood sugar,” we mean the specific chemical sugar glucose. Diabetes is all about glucose. There lots of sugars….table sugar is sucrose, malt sugar is maltose, milk sugar is lactose, and you’ve probably heard of fructose.

Blood sugar, or glucose, is the main sugar found in your blood. It comes from the food you eat, and is your body's main source of energy. Your blood carries glucose to all of your body's cells to use for energy.

Pls mark me brainiest and my name is Misty.

Mass is the measure of the quantity of the substance present in the sample containing a compound or molecule. The mass of sucrose in the sample is 171 g.

The mass of the compound in the sample is the product of the number of moles of the substance and the molar mass of the compound.

Given,

The molar mass of the sucrose compound = 342.3 g/mol

Number of moles of sucrose = 0.500 moles

Mass of sucrose is calculated as:

[tex]\begin{aligned}\rm mass &= \rm moles \times molar \; mass\\\\&= 0.500 \;\rm moles \times 342.3 \;\rm g/mol\\\\&= 171.15 \;\rm gm\end{aligned}[/tex]

Therefore, option A. 171 gm is the mass of sucrose.

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The correct answer is option A: 171 grams

Explanation: Got 90% on the quiz on edge and got this answer right

D. explosion

When a cracker is lit, a rapid response results in the development of large amount of energy of heat, light, and sound. Explosion is the term for such a reaction.

Answer:

D. Explosion

Explanation:

Here, we want to identify the type of combustion characterized by the given properties

From what we have, there is a sudden reaction that takes place as the cracker is ignited

The type of combustion here is called Explosion

It takes place suddenly with the evolution of light, heat, and sound upon ignition.

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Answer:

solar electric energy

Explanation:

k12

Answer:

25% is left   15 gm

Explanation:

(1/2)^2 = 25%

Answer:

b. 25% unchanged and 75% stable

Explanation:

got it right on edge

Answer:

1.50 moles

Balanced equation:  2Fe + 3Cl₂ --> 2FeCl₃

find moles of iron:

moles = mass/Mr

moles = 55.8/56

moles = 0.9964 moles

use molar ratio:

2Fe : 3Cl₂

2 : 3

moles of Cl₂ = (0.9964/2)*3 = 1.50 moles

Triangles may be regarded as similar or congruent on the following basis;

1) Side angle side (SAS)

2) Side side side (SSS)

3) Angle Angle side (AAS)

A triangle is a three sided figure. The figures are not shown here. However, two triangle may be regarded as similar or congruent by the following conditions;

1) Side angle side (SAS)

2) Side side side (SSS)

3) Angle Angle side (AAS)

Since the triagles are not shown here, the similarity of the triangles can not be established.

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The moles of I₂ will form from the decomposition of 3.58g of NI₃ is 0.0136 moles.

Moles of any substance will be calculated as:

n = W/M, where

W = required mass

M = molar mass

Given chemical reaction is:

2NI₃ → N₂ + 3I₂

Moles of 3.58g of NI₃ will be calculated as:

n = 3.58g / 394. 71 g/mol = 0.009 moles

From the stoichiometry of the solution, it is clear that:

2 moles of NI₃ = produce 3 moles of I₂

0.009 moles of NI₃ = produce 3/2×0.009=0.0136 moles of I₂

Hence, option (3) is correct i.e. 0.0136 moles.

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Answer:

A salt metathesis reaction, sometimes called a double displacement reaction, is a chemical process involving the exchange of bonds between two reacting chemical species which results in the creation of products with similar or identical bonding affiliations.

Explanation:

From: Wikipedia

Yes, we can dissolve 35 moles of KMnO₄ into 500 mL of water to give a molarity of 70 M

Molarity is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:

Molarity = mole / Volume

Molarity = mole / Volume

Molarity = 35 / 0.5

Molarity = 70 M

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We can not dissolve 35 moles of potassium permanganate into 500 ml of water as it produces the solution with higher molarity than water have.

Molarity of any solution is define as the number of moles of solute present in per liter of the solvent as:

M = n/V

The molarity of the solvent, water, is the highest for aqueous solutions and molarity of 1000g of pure water in 1 liter is 55.5M

Given that,

On putting values, we get

M = 35/0.5 = 70M

Preparation of this solution is impossible.

Hence, KMnO₄ will not dissolve in the water as it produces solution with higher molarity than water.

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(a) When more gas is added, the number of moles of the gas increases, and  the total pressure of gas inside same vessel will increase.

(b) When the conatiner's volume is increased, the total pressure of gas inside the vessel will decrease.

The ideal gas law of general gas equation, can be used to describe the behavior of an ideal gas.

The ideal gas law is given as;

PV = nRT

where;

When more gas is added, the number of moles of the gas increases, and  the total pressure of gas inside same vessel will increase.

When the conatiner's volume is increased, the total pressure of gas inside the vessel will decrease.

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Answer:

Its would be a very low C or a high D

Explanation:

Depending on what your teacher says or if you only got part of a question wrong it would be a very low C or a high D.

Answer:

The one 100 meters below the surface of the water.

Explanation:

As you go deeper into a body of water, there is more water above, and therefore a greater weight pushing you down.

Answer:

eight because I think it's eight

1nm=10^-6 cm.

476 nm = 4.76E-5 cm

Answer:

The formation of double and triple bonds is not as widespread among the atoms of the periodic table as one might expect. At least one of the atoms involved in a multiple bond is almost always C, N, or O, and in most cases both atoms are members of this trio

Covalent bonding occurs when electrons are shared between atoms. Double and triple covalent bonds occur when four or six electrons are shared between two atoms, and they are indicated in Lewis structures by drawing two or three lines connecting one atom to another.

Explanation:

Answer:

absorbed

Explanation:

Different colors of light can be reflected or absorbed and that determines color. For instance an object that absorbs every color but green will appear green to the human eye.

Answer:

The enthalpy of vaporization of a given substance is much greater than its enthalpy of fusion because it takes more energy to completely separate molecules (c

The 2,4 and 5 positions are accessible for nitration of 1,3‑dimethylbenzene. The final product is shown in the image attached.

Nitration is a type of reaction in which the nitro group (-NO2) is introduced to an aromatic ring. We have to note that in the compound 1,3‑dimethylbenzene, the 2,4 and 5 positions are accessible for nitration as shown.

Hence, the nitration of 1,3‑dimethylbenzene occurs  as shown in the image attached with the compound shown being the major product.

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The structure of the major nitration product from the reaction of nitric acid with 1,3‑dimethylbenzene is shown in attached image.

Nitration is a process in which addition of nitro group (-NO₂) is taking place on the substrate molecule.

In the given question 1,3‑dimethylbenzene is the susbtarte in which nitration will be done in the presence of sulphuric acid (H₂SO₄) and nitric acid (HNO₃). Methyl groups which are present in the substrate molecule will behave as an ortho para directing groups as they are electron donating groups. So the major product obtained in the reaction is shown below in image.

Hence the structure of major nitration product is shown below in image.

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Solar energy is a viable alternative energy resource due to its high usage application.

The solar energy is considered as a viable alternative energy resource because this energy can used in the form of electricity for operating all electrical devices present in our homes.

So we can conclude that solar energy is a viable alternative energy resource due to its high usage application.

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Answer:

It has an endless supply is the answer.

Answer: The color that will appear when the nichrome wire is properly cleaned and introduced into flame would be orange

Answer:

Teflon

Explanation:

Answer:

Mechanical weathering breaks rocks into smaller pieces without changing their composition. … Chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface. Water, carbon dioxide, and oxygen are important agents of chemical weathering.

Explanation:

brainlist me pls and I'm right, correct me if I'm wrong

Answer:

Mechanical weathering reduces the size of rocks without altering their content.

Chemical weathering damages rocks by creating new materials that are stable on earth's surface.