HELPPP simply the expression!!!!

Answer:

"2.Orbital." I think

Explanation:

Risk*

Answer:  Aluminum reacts with oxygen to produce aluminum oxide as follows: 4Al + 3O2 → 2Al2O3 a.

Explanation: I really really hope that was helpful.

Answer:

Hydrosulfuric acid will act as limiting reactant.

Explanation:

Given data:

Mass of iron(III) chloride = 3243.0 g

Mass of hydrosulfuric acid = 511.8 g

Limiting reactant = ?

Solution:

Chemical equation:

2FeCl₃ + 3H₂S       →       Fe₂S₃ + 6HCl

Number of moles of iron(III) chloride:

Number of moles = mass/molar mass

Number of moles = 3243.0 g/ 162.2 g/mol

Number of moles = 20 mol

Number of moles of hydrosulfuric acid:

Number of moles = mass/molar mass

Number of moles = 511.8 g/ 34.1 g/mol

Number of moles = 15 mol

Now we will compare the moles of both reactant with products

                      FeCl₃          :          Fe₂S₃

                       2                :            1

                      20               :          1/2 ×20 = 10

                      FeCl₃          :            HCl

                       2                :              6

                      20               :          6/2 ×20 = 60

                      H₂S             :          Fe₂S₃

                       3                :            1

                      15               :          1/3 ×15 = 5

                      H₂S            :            HCl

                       3                :              6

                      15                :          6/3 ×15 = 30

Hydrosulfuric acid producing less number of moles of product thus, it will act as limiting reactant.

Answer:

I believe it is B

Explanation:

hope it helps. please let me know if it's wrong

Explanation:

Carbon-12 and carbon-14 are two isotopes of the element carbon. The difference between carbon-12 and carbon-14 is the number of neutrons in each of their atoms. Atoms of both isotopes of carbon contain 6 protons. Atoms of carbon-12 have 6 neutrons, while atoms of carbon-14 contain 8 neutrons.

To solve this we must be knowing each and every concept related to autotroph. Therefore, eugenides and algae, both can be autotrophic. The correct option is option B.

An creature that can make its own sustenance out of inorganic materials is known as an autotroph. Contrarily, heterotrophs are species that can't make their own nutrition and must eat other organisms in order to survive.

In contrast to autotrophs, heterotrophs are unable to manufacture their own nourishment. Heterotrophs need to consume organic material in order to produce the nutrients needed for life, not inorganic. Eugenides and algae, both can be autotrophic.

Therefore, Eugenides and algae, both can be autotrophic. The correct option is option B among all the given options.

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The number of atoms that are in 0.340 moles of sodium is 2.047×10²³ atoms.

Avogadro's number is equal to 6.022×10²³ which gives idea about the number of atoms present in one mole of any substance.

i.e. In 1 mole = 6.022×10²³ atoms

Given moles of sodium = 0.34 mol

Number of atoms of sodium in given moles will be calculated as:

No. of Na atoms = 0.34mol × 6.022×10²³ atoms/mol = 2.047×10²³ atoms

Hence required number of atoms are 2.047×10²³ atoms.

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to generate energy means to create energy. chemical energy is the energy that is created when you put effort into doing something..  

Answer:

Conduction

Explanation:

Conduction is how heat transfers through direct contact with objects that are touching. Any time that two objects or substances touch, the hotter object passes heat to the cooler object.

Answer:

Conduction

Explanation:

Conduction is how heat transfers through direct contact with objects that are touching. Any time that two objects or substances touch, the hotter object passes heat to the cooler object.

The empirical formula = the molecular formula = C₁₀H₂₀O

Given

m =  0.15 g menthol

V = 0.0337 L

T = 150 +273 = 423 K

P = 100.2 kPa =0.99 atm

Required

molar mass

The molecular formula

Solution

Ideal gas law :

PV=nRT

n=PV/RT

n=0.99 x 0.0337/0.082 x 423

n=9.6 x 10⁻⁴

n =  mass/Molar mass

Molar mass = mass/n

Molar mass = 0.15/9.6 x 10⁻⁴

Molar mass = 156.25 g/mol

The empirical formula of Menthol : C₁₀H₂₀O

(The empirical formula)n= molecular formula

(C₁₀H₂₀O)n=156.25

(12.011.10+1,007.20+15,999)n=156.25

(156.25)n=156.25

n=1

Answer:

N2+ 3H2－> 2NH3

2Fe + 6HCl －> 3H2 + 2FeCl3

Answer:

Cl^- <S^2-<Sc^3+ <Ca^2+<K^+

Explanation:

We know that ionic radius of ions decreases from right to left in the periodic table.  This is because, ionic radii decreases with increase in nuclear charge. This explains why; Sc^3+ <Ca^2+<K^+.

Secondly, even though Cl^- is isoelectronic with S^2-, the size of the nuclear charge in Cl^-  is larger compared to that of  S^2- . Hence Cl^-  is smaller than S^2- in ionic radius owing to increased nuclear attraction in Cl^-.

Answer:

you will get 17.983 g of lithium for every 100 g of lithium phosphate.

Explanation:

69.7%  is the percent by mass of Lithium in  Li[tex]_3[/tex]PO[tex]_3[/tex]. A percent is obtained by multiplying the result by 100.

One approach to show the concentration for an element within a compound or component in a combination is as a mass percentage. The mass percentage is computed by dividing the total weight of the combination by the mass of each component and multiplying the result by 100%. The mass percent is calculated by dividing the mass that contains the compound and solute by the mass for the element or solute.

99.795g/mol = molar mass of  Li[tex]_3[/tex]PO[tex]_3[/tex]

6.94g/mol = molar mass of Li

mass percentage of Li=(molar mass of Li/molar mass of Li[tex]_3[/tex]PO[tex]_3[/tex])×  100

=(6.94/99.7)×  100

=69.7%

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Explanation:

unorganized and unsorted i think this is the answer

Answer:

Similarity: Rocks within the mantle contain more magnesium and iron than the ones in the crust.

Difference: Rocks in the deep mantle are under intense heat and pressure. In this case, they are semi-solid rocks that flow slowly. On the other hand, the part of the mantle that is nearest to the surface consists of rigid rocks. It has a lower temperature than the rocks in the deep mantle.

Explanation:

Rocks within the mantle contain more magnesium and iron than the ones in the crust.

Rocks in the deep mantle are under intense heat and pressure. In this case, they are semi-solid rocks that flow slowly.

On the other hand, the part of the mantle that is nearest to the surface consists of rigid rocks. It has a lower temperature than the rocks in the deep mantle.

According to geologists, a rock is a naturally occurring material made up of crystalline crystals of various minerals that have fused together to form a solid mass.

Therefore, Rocks within the mantle contain more magnesium and iron than the ones in the crust.

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Answer: I believe -3

Explanation:

Answer:

Final volume is 1.29cm³

Explanation:

Using combined gas law:

P₁V₁/T₁ = P₂V₂/T₂

Where P is pressure, V volume and T absolute temperature of 1, initial state and 2, final state of a gas.

We can solve the volume of the gas:

P₁ = 1atm at STP

V₁ = 1cm³

T₁ = 273.15K at STP

P₂ = 710mmHg * (1atm / 760mmHg) = 0.9342atm

V₂ = ?

T₂ = 55.0°C + 273.15K = 328.15K

Replacing:

1atm*1cm³/273.15K = 0.9342atm*V₂/328.15K

1.29cm³ = V₂

Answer:

Ions form when atoms gain or lose electrons. Since electrons are negatively charged, an atom that loses one or more electrons will become positively charged; an atom that gains one or more electrons becomes negatively charged. Ionic bonding is the attraction between positively- and negatively-charged ions.

Answer:

Noble gases are the least reactive of all known elements. That's because with eight valence electrons, their outer energy levels are full.

Elements: Argon

Answer:

there are three fundamental particles of atom

which are :

Particle Symbol

electron =》e-

proton =》p+

neutron =》n°

Answer:

the atomic number

Explanation:

it would be in the upper corner

Answer:

x is horizontal

y is vertical

Explanation:

Answer:Molarity tells us the number of moles of solute in exactly one liter of a solution. (Note that molarity is spelled with an "r" and is represented by a capital M.) We need two pieces of information to calculate the molarity of a solute in a solution: The moles of solute present in the solution

Explanation:

Answer:

its definitely a physical change as the way you see it now is different then before

Answer:

b

Explanation:

because it changed colors

Answer: Carbon Dioxide, Methane, Nitrous Oxide and Fuorinated Gases

Explanation:Carbon dioxide (CO2): Carbon dioxide enters the atmosphere through burning fossil fuels (coal, natural gas, and oil), solid waste, trees and other biological materials, and also as a result of certain chemical reactions (e.g., manufacture of cement). Carbon dioxide is removed from the atmosphere (or "sequestered") when it is absorbed by plants as part of the biological carbon cycle.

Methane (CH4): Methane is emitted during the production and transport of coal, natural gas, and oil. Methane emissions also result from livestock and other agricultural practices and by the decay of organic waste in municipal solid waste landfills.

Nitrous oxide (N2O): Nitrous oxide is emitted during agricultural and industrial activities, combustion of fossil fuels and solid waste, as well as during treatment of wastewater.

Fluorinated gases: Hydrofluorocarbons, perfluorocarbons, sulfur hexafluoride, and nitrogen trifluoride are synthetic, powerful greenhouse gases that are emitted from a variety of industrial processes. Fluorinated gases are sometimes used as substitutes for stratospheric ozone-depleting substances (e.g., chlorofluorocarbons, hydrochlorofluorocarbons, and halons). These gases are typically emitted in smaller quantities, but because they are potent greenhouse gases, they are sometimes referred to as High Global Warming Potential gases ("High GWP gases").