The mixture in the large beaker still looked clear like water, but when the students, one at a time, carefully touched the outside of the large beaker, it felt warm to the touch.

Why did the large beaker most likely feel warm?

Answer:

Polling is a method used for the purification of copper or tin which contains oxide impurities

Answer:

Polling is used for the purification of copper or tin which contains oxide impurities. The impure metal is melted and stirred with green logs of wood. The heat of molten metal makes the green logs to liberate hydrocarbon gases which in turn reduce the metal oxide into metal.

Answer:

Carbon dioxide

Explanation:

In the making of the muffins, there are many ingredients are used including flour, egg, butter, sugar, and flavoring of fruits. There is also a raising agent, the baking powder or baking soda used that reacts with the batter.

This reaction form bubbles of carbon dioxide, trapped in the air spaces during the baking and muffin raises. Carbon dioxide makes muffins light, by lifting the batter as it bakes.

Answer:

Second.

Explanation:

There are four types or kinds of the laws of thermodynamics, but in this question we are actually considering the second law of thermodynamics.

The second law of thermodynamics, in a simple sense means that energies can flow in an equilibrate manner. It can also be stated as the total entropy of the universe. The second law is normal refer to as Law concerning Entropy.

Thus, filling the gap in the Question above. Note that the word written in capital letters is the missing word.

"The SECOND law of thermodynamics states that when two objects of different temperature are in contact, heat energy will flow from the hotter to the cooler object."

Answer:

Explanation:

so, limiting reactants are the reactant which limit the continuing of the reaction or in simple word they are the element that run out first and are totally consumed

equation :

2koh+h2so4⇒ k2so4 +2h2o

if we have 4 mol of h2so4 and 3 mol of 2koh

                 number of produced moles of k2so4 on consuming all :

h2so4 ⇒ k2so4

1 mol          1 mol

4 mol            ?mol

no of mol of k2so4 if all h2so4 is consumed 4 mol

2koh⇒ k2so4

2 mol       1 mol

3 mol         ?mol

no of mol of k2so4 if we consume all koh = 1.5 mol

since the koh produces less mol on consuming it all

the koh is the limiting reactant

Answer:

first u have to like draw like a number line uk how dey do in math but instead of num u add wht eva da question askin u

Explanation:

Explanation:

1 ) first u have to balance the equation but in this case it is already balanced.

2) checking for the limiting reactant:

13 mol O2 × (1mol H2O / 1mol of O2) = 13 mol of H2O

14 mol of ethanol × (1mol H2O/ 1molof ethanol) = 14 mol of H2O

the less amount of moles produced from the O2 so the limiting reactant is oxygen

3) calculating the products moles

13 mol O2 × (1mol H2O / 1mol of O2) = 13 mol

13 mol O2 × (1mol Ch3Cooh / 1mol O2) = 13 mol

note: the ratios obtained from the balanced equation

4) the excess reagent is the ethanol 1 mol will be remain

Answer:

Explanation:

there's no options that you put but usually if you add more of the reactant the rate will increase, adding a catalyst will increase the rate, and increasing the temperature if it's endothermic

Answer:

98.08g/mol is your answer

Explanation:

hope this helps

Answer:

Explanation:

electrolysis is the technique that use direct current to drive a non spontaneous chemical reaction chemical reaction is the gain or lose of electron this technique is use to extract metal from theirs ores

Answer:C

Explanation:The samples are composed of different proportions of copper and zinc

Formation. Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material

Steel is a mixture of iron and carbon fused together with one or more other metals or nonmetals. Because steel is a mixture rather than a chemical compound, steel does not have a set chemical compound formula.

Answer:

No

Explanation:

Steel is a mixture of iron and carbon fused together with one or more other metals or nonmetals. Because steel is a mixture rather than a chemical compound, steel does not have a set chemical compound formula.

Answer:

Here now you can give the other person the brainly they deserve and they were right too :)

Explanation:

The line that has been the representation of the region of rarefaction in the diagram has been the line below the top line.

The diagram has been the representation of the movement of the particles under the influence of wave energy. The particles have been moving from left to right in the longitudinal order with a gain of energy.

The rarefaction has been the instance where the density of the waves has been lesser or where there has been one wavelength of the wave.

The diagram has been representing, at the line below the top arrow, there have been lesser density of the wave particles, thus, the region of rarefaction has been the instance in the lines below the top line.

For more information about the rarefaction, refer to the link:

https://brainly.com/question/1326823

Answer:

500g Ika= 10.85 mol 500g (46.0699) - 10.35 mol - 3.00m - 13.62 kq 5.

Explanation:

Does this help?

A 3.00 M solution of [tex]C_2H_5OH[/tex] would be prepared by dissolving 0.500 kg of  [tex]C_2H_5OH[/tex] in 3.62 kg of water.

0.500 kg  [tex]C_2H_5OH[/tex] is equivalent to (mole = mass/molar mass):

      500g/46.07 = 10.85 moles of  [tex]C_2H_5OH[/tex]

3.00 M solution of  [tex]C_2H_5OH[/tex] can be prepared by dissolving 10.85 moles in (molarity = moles/volume):

                      10.85/3 = 3.62 Liters of water

3.62 liters of water weighs (density = mass/volume);

              1 x 3.62 = 3.62 kg

Thus, 3.62 kg of water will be required to prepare the solution.

More on stoichiometric calculations can be found here: https://brainly.com/question/27287858

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Answer:

The correct answer is 10

Answer:

What role does the Automated Surface Observing Systems (ASOS) play in weather forecasting? It is a system of radar sensors used to track storms. It is the nation's primary weather-observing network. It provides weather reports much like the National Weather Service.

Explanation:

Answer:

the answer is c).It is the nation's primary weather-observing network.

Explanation:

Answer:

E

Explanation:

took the test

Answer:

A

Explanation:

Answer:

i agree

Explanation:

um this is kinda weird I am take a guest SIF4

The formula that represents a tetrahedral molecule is SiF₄. The correct option is the fourth option - SIF4

From the question,

We are to determine which of the given formulae represents a tetrahedral molecule

In order to determine the molecule that represents a tetrahedral molecule, we will determine which of the molecules has a tetrahedral molecular geometry.

A tetrahedral molecular geometry has a central atom located at the center with four substituents that located at the corners of a tetrahedron

Among the given options, the molecule that has four substituents is SiF₄. Si is the central atom and the F atoms are the substituents.

Hence, the formula that represents a tetrahedral molecule is SiF₄. The correct option is the fourth option - SIF4

Learn more here: https://brainly.com/question/2108211

Answer:

Th answer is b. convection.

Explanation:

As the heat rises it cools down and it sinks and as the cold sinks it heats up so then it rises back up.

Answer:

Lead phosphate

Explanation:

Pb3(po4)2 has the compounded name of lead(II) phosphate.

It is a white, crystalline solid that is insoluble in water. Lead(II) phosphate is used in some paints and plastics, and it is also used as a pigment.

The name of the compound is based on the oxidation state of the lead atom. Lead can have two oxidation states, +2 and +4. In Pb3(PO4)2, the lead atom has an oxidation state of +2, so the compound is named lead(II) phosphate.

The phosphate ion has an oxidation state of -3, so there are two phosphate ions in the compound to balance the +6 charge of the three lead atoms.

Find out more on lead(II) phosphate at https://brainly.com/question/7900817

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Explanation:

P×V=n×R×T

L×atm / mol×K

n= PV /RT

Description:

So as we know that our Known variables: are P, V, R, T and our unknown variables are n. N= PV / RV. = 6.02 moles.

Answer: 6.02  moles

Hope this helps.

The moles of nitrogen gas present in 135 L at STP have been 6.02 moles.

The nitrogen gas has been assumed to be the ideal gas. For an ideal gas, at STP or standard pressure and temperature, the volume of 1mole of gas has been 22.4 L.

The STP conditions have been 273.15 K temperature, and 1 atm pressure.

Since, moles in 22.4 L gas been 1 mole. The moles in 135 L gas has been:

22.4 L = 1 mole

135 L = [tex]\rm \dfrac{1}{22.4}\;\times\;135\;moles[/tex]

135 L gas = 6.02 moles.

The moles of nitrogen gas present in 135 L at STP have been 6.02 moles.

For more information about the volume at STP, refer to the link:

https://brainly.com/question/11676583

Examples of compounds include table salt or sodium chloride , sucrose (a molecule, nitrogen gas, a sample of copper, and water.

Answer:

It is more important because of the freedom.

Explanation:

While at home you can do your work of course... but you could lay down, take a nap. You could get on the game, play around. You could draw, and fiddle and dance and do WHATEVER you want with no teacher to stop you so you have to be your own motivation. You have to be your own teacher or its VERY easy to fail.