PLEASE HELP ASAP
Aluminum oxide (Al2O3) and iron (Fe) react according to the following
balanced equation:
4Al2O3 + 9Fe + 3Fe304 + 8A|
If there are 10.2 grams of Al2O3 and 11.2 grams of Fe, which statement
identifies the limiting reagent in this reaction and best supports that claim?

Answer:

C.

Explanation:

A mixture contains two or more substances.

A compound contains elements in a fixed ratio.

P = Element

Q = Compound

R = Mixture

The correct order is C.

Answer:

natural flame,oxidising flame

Answer:

The three main rock types are igneous, metamorphic and sedimentary. The three processes that change one rock to another are crystallization, metamorphism, and erosion and sedimentation. Any rock can transform into any other rock by passing through one or more of these processes. This creates the rock cycle.

The best way for helping the earth water supply that should be last for future generations should be considered option b. where it decrease the residential water usage.

The average American family should be used for more than 300 gallons of the water per day at home. Approximately 70% of the use should arise indoors,

Moreover, outdoor water should be accounted for 30% of household that should be high in drier parts for the country and it should be more water intensive landscape.

Therefore, the option b is correct.

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The answer is gold.

Substance: Specific Heat (C) in joules per gram/degrees centigrade:

Water (ice) 2.05

Iron 0.46

Aluminium 0.90

Gold 0.13

Copper 0.39

Ammonia (liquid) 4.70

Ethanol 2.44

Gasoline 2.22

Water (liquid) 4.18

Water (vapor) 2.08

Air (25 degrees Celsius) 1.01

Oxygen 0.92

Hydrogen 14.30

To know that we clear the equation q=m*C*Δt for the specific heat (C) and solve the equation. Keep in mind that we need to use the heat (520 J) in Joules since the values from the question and the table are in Joules.

q/m∗ΔT = C = 520J/200g∗(45degC−25degC) =

0.13J/gdegC

As you can see, the substance that has this specific heat is GOLD.

The value of specific heat for the given data in the question will be for gold:-

[tex]C= 0.13\ \dfrac{J}{g^oC}[/tex]

Specific heat can be defined as the amount of heat one kg or gram substance can absorb or release for a unit temperature difference.

The formula for the heat will be:-

[tex]Q=mc\Delta T[/tex]

m= Mass of substance

c= specific heat of the substance

[tex]\Delta T[/tex]= Temperature difference

Now the given data is

m= 200 g

Q= 520 J

[tex]\Delta T[/tex]=  (45-25)=20

[tex]Q=mc\Delta T[/tex]

[tex]520=200\times C\times 20[/tex]

[tex]C= \dfrac{520}{200\times 20} =\dfrac{520}{4000} =0.13\ \dfrac{J}{g ^oC}[/tex]

Since the value of specific gold  is  [tex]0.13\ \dfrac{J}{g ^oC}[/tex]

Thus the value of specific heat for the given data in the question will be for gold:-

[tex]C= 0.13\ \dfrac{J}{g^oC}[/tex]

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Answer:

1) increases

2)increases

3) Decreases

4) increases

5) increase

6) decreases

Explanation:

Let us remember that in a solid, the molecules of the substance are trapped in fixed positions hence the entropy of a solid is less than that of liquid as well as less than the entropy of a gas.

Reaction (1) and (2) deal with a change of state from solid to liquid or gas leading to increase in entropy.

In reaction (3) the aqueous reactants convert into a liquid product leading to a decreases in entropy.

Reaction (4) and (5) has to do with change of a solid to a gas as well as an increase in volume leading to an increase in temperature.

For reaction(6), a solid is formed so entropy decreases

Answer:

Al2o3 grams to moles

Explanation:

You can view more details on each measurement unit: molecular weight of Al2O3 or grams This compound is also known as Aluminium Oxide. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Al2O3, or 101.961276 grams.

Answer:

Answer: everything except E

Explanation: There was no dramatic change in temperature and i just took the assignment.

According to the law of conservation of matter, matter cannot be created not be destroyed. In this experiment, no matter loss will occur but there will be rapid evolution hydrogen gas and the balloon will expand.

According to conservation of matter, matter can neither be created nor be destroyed but its state and properties can be changed. The total mass of the reactants will be equal to the total mass of the products.

Magnesium is a second group element and is a metal. Metal reacts with  hydrogen halides to form metal halides and hydrogen gas as the reaction written below:

[tex]Mg +2 HCl \rightarrow MgCl_{2} +H_{2}[/tex]

The evolved hydrogen gas in this reaction tries to diffuses out the sealing and thus the balloon cover expands.  And thus the solid magnesium metal disappears to form magnesium chloride.

The evolution of gases is exothermic and therefore,  the temperature outside increases suddenly.  There we can see bubbles of hydrogen  in the reaction system.

Therefore, the changes that occur in the experiments are, rapid evolution of gases, solid metal disappears, sealing cover expands and there occur a rapid change in temperature. Thus options A,C,D,E are correct.

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Answer:

Laboratory safety rules are important because there can be many dangerous chemicals in a lab.  Safety rules help people stay safe when they are in close contact with these chemicals.  Over the past few years, lab safety rules have prevented many deaths.  It's important to follow these rules because you could get seriously injured if you don't.

Hope that helps!  Good luck!  :)

Explanation:

1 mol of an atom (irregardless of the element) contains the Avogadro's number of atoms. This is given as;

1 mol = 6.022 * 10^23 atoms

For a neutral atom;

NUmber of protons = Number of electrons

The relationship between proton and neutron is given as;

Mass Number = Protons + Neutrons

Ag-108

Atoms =  6.022 * 10^23 atoms

Protons = Atomic Number = 47

Electrons = 47

Neutrons = Mass Number - Protons = 108 - 47 = 61

Pt-195

Atoms =  6.022 * 10^23 atoms

Protons = Atomic Number = 78

Electrons = 78

Neutrons = Mass Number - Protons = 195 - 78 = 117

Answer:

B. Germanium

Explanation:

Since the carbon group element consists of carbon, germanium, etc. Germanium is in the same group as carbon.

Answer:

copper oxide has been reuced into copper

Explanation:

The copper has gained electrons to become stable on its own without oxygen

OILRIG- show that reducution is the gain of electrons

Answer:

[;

Explanation:

Mudflows (geosphere) and flooding may occur downstream from volcanoes and may inundate streamside communities (biosphere).

Answer:

R we gonna say what letter if were gonna say it its A

Explanation:

SBc Its Our Lesson Today In Science

Answer:

3.11 is the pH of the solution

Explanation:

The ionised form of the acetic acid is the acetate ion. To solve this problem we need to solve H-H equation:

pH = pKa + log [A⁻] / [HA]

Where pH is the pH of the buffer

pKa = -log Ka  = 4.74

[A⁻] = Concentration of acetate ion = 0.002M * 2.3% = 4.6x10⁻⁵M

[HA] = Concentration of acetic acid = 0.002M *(100-2.3)% = 0.001954M

Replacing:

pH = 4.74 + log [4.6x10⁻⁵M] / [0.001954M]

pH = 3.11 is the pH of the solution

Answer:

A

Explanation:

Answer:

a

Explanation:

Answer:

C2H2O1

Explanation:

I got it right on plato :>

C2H6O1 is the correct answer.

Answer:

they are bacteria

Explanation:

Answer:

Good bacteria keeps you healthy by supporting your immune function and controlling inflammation. Certain types of good bacteria can also: Help your body digest food. Keep bad bacteria from getting out of control and making you sick.

Explanation:

I hope this helps and pls mark me brainliest :)

Answer:

single displacement

Explanation:

d) 0.

5 out of 8 would be paired already because it has 5 electrons, then the other 3 would be filled by the 3 hydrogens.

Answer:

The kinetic theory of matter (particle theory) says that all matter consists of many, very small particles which are constantly moving or in a continual state of motion.

Answer:

pop, emotional, heart touching, freestyle and rap music is what I LOVE!!!!!

Answer:

we need to see the diagram

Explanation:

Answer:

The correct answer is - due to the movement of plates it is relocated.

Explanation:

Antarctica is a very cold part of the earth, it is so cold that there is no growth of trees or such vegetation. Even though there are no or less vegetation scientists found fossils of the trees.

It is relocated from the north where the conditions were warmer and easy for tree growth. It is then moved due to plate movements to the south pole. This is the reason behind the fossils scientist found.

Answer:

factor

Explanation:

Answer:

something pushes or pulls it to a stop.

Answer:

Answer:

Asan po yung choices?