PLS, I NEED HELP!!!!

Next, you will gradually apply heat to the sugar and observe the effects. Your goal is to identify the point at which sugar begins to melt. To get started, follow these steps. Then, answer the question that follows.


Pour 1 tablespoon of sugar into a cooking pan. Spread it out across the surface of the pan. Place the pan on a stove.

Because all stoves are different, you’ll need to identify your low, medium, and high heat settings before proceeding to step 3.

Use the method below to gradually heat the pan until you see the sugar begin to melt. Once the sugar melts, note how much time has elapsed and the final heat setting. If at any point the pan begins to smoke, immediately turn off the heat source and remove the pan from the heat. Heat the pan for these times and temperatures, stopping when the sugar begins to melt:

5 minutes on low heat

5 minutes on medium-low heat

5 minutes on medium heat

5 minutes on medium-high heat

5 minutes on high heat

When the sugar melts, turn off the stove and remove the pan from the heat. Do not touch the hot pan except by its handle. Use hot pads or oven mitts if the pan’s handle isn’t insulated. Let the pan sit off the heat on a heat-resistant surface until it cools.

Approximately how many minutes did it take for the sugar to melt? What was the final heat setting?

Repeat the process given in part D using salt instead of sugar. Did the salt melt? If so, approximately how many minutes did it take for the salt to melt?

Answer:

0.5667 M ≅ 0.57 M.

Explanation:

It is known that the no. of millimoles of a solution before dilution is equal to the no. of millimoles of the solution after the dilution.

It can be expressed as:

(MV) before dilution = (MV) after dilution.

M before dilution = 1.5 M, V before dilution = 340 mL.

M after dilution = ??? M, V after dilution = 340 mL + 560 mL = 900 mL.

∴ M after dilution = (MV) before dilution/(V) after dilution = (1.5 M)(340 mL)/(900 mL) = 0.5667 M ≅ 0.57 M.

Answer: New Hampshire

Explanation:

If it is the dark green then its New Hampshire :)

Answer:

New Hampshire ;)

Explanation:

New Hampshire is the dark green state on this map, and it is apart of the first 13 colony I hope that helped.

Answer:

Engineering is all about solving problems using math, science, and technical knowledge. And engineers have solved a lot of problems in the world by designing and building various technologies. We have everything from machines that can breathe for you in hospitals to suspension bridges to computers we use every day. All of these things were once designed by engineers using the engineering design process.

Explanation:

Answer:

Students will have to use their brains to solve problems and challenges they will face to find a solution to cleaning up oil spills. Students will face failures after completing their solution, lots of research, and problems during the making of their solutions. What will work? What won't?

Explanation:

Hope this helps!

Answer:

see below

Explanation:

water  pH ~ 7     acids are less than 7                bases are > 7

Answer:

2

Explanation:

do take note that combustion reactions releases oxygen.

Aluminium is the metal which must release the most heat to experience a given decrease in temperature per gram of metal.

This is as a result of free electrons and is the ability of a substance to conduct heat.

Aluminium has the highest thermal conductivity in this case which is why it will release the most heat to experience a given decrease in temperature per gram of it.

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Answer:

C

Explanation:

Increasing temp causes increased molecule movment in sample 2

Answer:

B

Explanation:

NaNO3 and H2O

(double replacement reaction)

⇒ 0.018

-use pH=-log[H3O+]

-solve for H3O+

Terbium-147 undergoes positron emission to become a stable atom, the stable atom is ₆₄Gd¹⁴⁷.

Series (or family) of natural radioactive decay is the set of elements with unstable nuclei, which follow an orderly sequence of spontaneous decay, that is, they emit alpha and beta particles, until a stable lead nucleus is created.

In this case, natural radioactive decay occurs when the nucleus of the atom of some chemical element is unstable and then it "breaks", releasing electromagnetic radiation and disintegrating.

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As both the ions have charge of +2 the compound formed is PbMg as the like charges will cancel out each other.

An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.

Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with oppositely charged ions resulting in neutral molecules.Ions of opposite charges combine in ionic compounds.

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Answer:

because the ions arent firmly held in place!

Explanation:

Let's see

[tex]\\ \rm\dashrightarrow k=\dfrac{Concentration\:of\: products}{Concentration\:of\: reactants}[/tex]

[tex]\\ \rm\dashrightarrow k=\dfrac{\left[A_2B_2\right]}{\left[A\right]^2\left[B\right]}[/tex]

Answer:

In this type of neutralization reaction, the acids and bases are the reactants, since they are the materials that will react to form a new solution. The products are water and salt since they have been created following the reaction.

Explanation:

Neutralization occurs when a strong acid and a strong base come together in a chemical reaction to form water and salt.

In chemistry, acids and bases are measured on the pH scale, which ranges from 0 to 14. Pure water sits in the middle, at a neutral 7. Anything below 7 is an acid, and anything above 7 is a base. Often, solutions are either too acidic or too basic, so a reaction must take place in order to achieve neutralization.

That neutralization leads to the formation of water and salt. In chemistry, salt doesn’t necessarily just mean table salt. It is also a broader term that categorizes the compound that is created in the reaction between an acid and a base.

Explanation:

a) 2 (Cr)³+ + 3 BiO3- + 4 H+ → 3 (Bi)3+ + Cr2O72- + 2 H2O

b)

have posted a similar question in the image for the phosgene i hope it helps little

Answer:

a. because it is an element

Explanation:

its pure because it only has one type of atom, making it an element

The hydrocarbons that will undergo substitution reactions with chlorine would be those that are saturated.

They are hydrocarbons that contain no double or triple carbon to carbon bonds.

Such hydrocarbons cannot undergo addition reactions unlike those that contain double or triple bonds.

Alternatively, saturated hydrocarbons are able to undergo substitution reactions with chlorine in the presence of light, with hydrogen being displaced in the process.

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Answer:

female reproductive structures

This is not the best way to organize a periodic table because two elements might have similar atomic mass.

Periodic table is a chart in which arrangement of chemical elements are done.

In the early periodic table elements are arranged on the basis of their atomic masses, while after sometime Moseley arranged the periodic table on the basis of atomic number as he proposed that properties of an element is justified on the basis of number if electrons.

And mass of two substances may be same so it is difficult to differentiate between them.

Hence, two elements might have similar atomic mass.

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Answer:

What is the hydrogen ion concentration of a solution labeled "Solution A", whose pH is 5.60? 

Tutorial

In this problem we are given pH and asked to solve for the hydrogen ion concentration. Using the equation, pH = − log [H+] , we can solve for [H+] as,

− pH = log [H+] ,

[H+] = 10−pH,

by exponentiating both sides with base 10 to "undo" the common logarithm. The hydrogen ion concentration of "Solution A" is,

[H+] = 10−5.6 ≈ 0.0000025 = 2.51 × 10−6 M.

We can always check our solution by computing −log (2.5 × 10−6) ≈ 5.6.

The wavelength of an electromagnetic wave that has a frequency of 1.82 x 10¹⁸ Hz in a vacuum is 1.65 × 10-¹⁰m.

The wavelength of a wave can be calculated by dividing the speed of the wave by its frequency.

According to this question, a wave has a frequency of 1.82 x 10¹⁸ Hz in a vacuum and speed of light in a vacuum is 3.00 × 10⁸ m/s.

wavelength = 3 × 10⁸ ÷ 1.82 × 10¹⁸

wavelength = 1.65 × 10-¹⁰m

Therefore, the wavelength of an electromagnetic wave that has a frequency of 1.82 x 10¹⁸ Hz in a vacuum is 1.65 × 10-¹⁰m.

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Answer:

Wax

Explanation:

The combustible material in a candle or its fuel is wax. Before the wax can become fuel, it first needs to get hot enough. To start that heating process, you first need to light the wick with another source of fire, such as a match. As the wick burns down the heat of the flame melts the wax around the wick.

Answer: As one atomic dipole nears another atom it will affect the electron density distribution, so for example if the slightly positive end of the atom is located next to another atom, it will attract the electron(s) in the other atom. A covalent bond happens when atoms share an electron between them. The other kind of bond is called ionic, and it happens when one atom gives an electron to another atom. These bonds are held together with electric forces. Two atoms of the same element can be different if their electrons are in different states. If one copper atom has an electron in an excited state and another copper atom has all of its electrons in the ground state, then the two atoms are different.

Answer:

there are relatively few atoms but they can make many molecules

Explanation:

Answer:

1.1 M

Explanation:

The formula mass of sodium hydrogen carbonate is about 23+1+12+3(16)=84 g/mol, so 96 g is about 1.142 mol.

molarity = (moles of solute)/(liters of solution) = 1.1 M

Answer:

299.60 g

Explanation:

Use the formula q = mCΔT (q= heat, m= mass, c = specific heat for that specific substance, ΔT is change in temperature Final Temp - Initial Temp)

Released heat means it has negative sign.

q = mCΔT

-2744 = (mass) (0.129) (19-90)

mass= 299.60 g

Answer:

Its neither a myth nor deadly

Explanation:

Bizarre hexagonal clouds forming above the Bermuda Triangle may be the reason why dozens of ships and planes have mysteriously vanished in the notorious patch of sea, according to scientists.

According to the new theory, clouds over the Bermuda Triangle are like “air bombs” strong enough to cause ship and plane wrecks. The strange “hexagonal” shaped clouds were discovered using radar satellite imagery, which were between 20 and 50 miles wide forming over the water.

Answer:

Hello there! I believe the answer you need is d= M/V. Have a good day,night or miday. Sorry if I'm wrong.