help w this please and thank you.

Answer:

Try this for answer 3082.24

Answer:

3A     +     B      →     C      +      2D

Explanation:

Recall that:

[tex]\text{molarity} = \dfrac{no \ of \ moles}{volume \ of \ the \ solution}[/tex]

So;

[tex]\text{no \ of \ moles= molarity * volume \ of \ the \ solution}[/tex]

From the above table given in the question; we can have the following table:

Run            moles of A            moles of B     Limiting reagent

1                 0.5×  10⁻²                 0.5×  10⁻²           A and B are equal

2               1.0 0.5×  10⁻²             0.5×  10⁻²          A

3.               1.5×  10⁻²                   0.5×  10⁻²          A

4               2.0×  10⁻²                    0.5×  10⁻²         B

Also, provided that the stoichiometric coefficients for C and D = 1 & 2 respectively.

Then, the stiochiometric ratio for A:B = [tex]\dfrac{1.5\times 10^{-2}}{0.5 \times 10^{-2}}[/tex]

[tex]= \dfrac{3}{1}[/tex]

Thus, the balanced equation is:

3A     +     B      →     C      +      2D

Answer:

true

Explanation:

Answer:9.03*10^23

Explanation:

Answer:

25.88 g of F₂.

Explanation:

From the question given above, the following data were obtained:

Number of molecules of F₂ = 4.10×10²³ molecules

Mass of F₂ =?

From Avogadro's hypothesis,

1 mole of F₂ = 6.02×10²³ molecules

Next, we shall determine the mass of 1 mole of F₂. This can be obtained as follow:

1 mole of F₂ = 2 × 19 = 38 g

Thus,

38 g of F₂ = 6.02×10²³ molecules

Finally, we shall determine the mass of 4.10×10²³ molecules of F₂. This can be obtained as follow:

6.02×10²³ molecules = 38 g of F₂

Therefore,

4.10×10²³ molecules = 4.10×10²³ × 38 / 6.02×10²³

4.10×10²³ molecules = 25.88 g

Thus, 25.88 g of F₂ contains 4.10×10²³ molecules.

Answer:

Hope some of these give you impetus to think of other bullet points, sounds good to me.  !!

Explanation:

Answer: I can help with that!

Explanation: 1.The tremendous growth in the U.S. solar industry is helping to pave the way to a cleaner, more sustainable energy future. Over the past few years, the cost of a solar energy system has dropped significantly -- helping to give more American families and business access to affordable, clean energy.

Through a portfolio of R&D efforts, the Energy Department remains committed to leveraging America’s abundant solar energy resources -- driving research, manufacturing and market solutions to support widespread expansion of the nation’s solar market.

2.The amount of sunlight that strikes the earth's surface in an hour and a half is enough to handle the entire world's energy consumption for a full year. Solar technologies convert sunlight into electrical energy either through photovoltaic (PV) panels or through mirrors that concentrate solar radiation. This energy can be used to generate electricity or be stored in batteries or thermal storage.

Below, you can find resources and information on the basics of solar radiation, photovoltaic and concentrating solar-thermal power technologies, electrical grid systems integration, and the non-hardware aspects (soft costs) of solar energy. You can also learn more about how to go solar and the solar energy industry. In addition, you can dive deeper into solar energy and learn about how  the U.S. Department of Energy Solar Energy Technologies Office is driving innovative research and development in these areas.

3.Solar radiation is light – also known as electromagnetic radiation – that is emitted by the sun. While every location on Earth receives some sunlight over a year, the amount of solar radiation that reaches any one spot on the Earth’s surface varies. Solar technologies capture this radiation and turn it into useful forms of energy.

Answer:

Explanation:

When you divide exponentials, you subtract the powers. For the numbers infront, just use a basic calculator for.

7.95/6.02 = 1.32

10^22/10^23 = 10^-1

1.32 x 10^-1 is your answer

Answer:

74.87% Carbon

Explanation:

The molecular mass of CH4 is 16.042 g/ mole.

X=(100 × 12.01) / 16.042= 74.87%  

Answer:

[tex]\boxed {\boxed {\sf 74.87 \% \ C}}[/tex]

Explanation:

We want to find the mass percent composition of carbon in methane: CH₄

First, we must calculate the gram formula mass, also called the molar mass. Use the values for mass found on the Periodic Table. Look for carbon and hydrogen.

There is no subscript after C, so there is just 1 atom. There is a subscript of 4 after H, so there are 4 atoms of hydrogen. We must multiply hydrogen's mass by 4.

Calculate the percent composition.

[tex]\frac {mass \ of \ part}{mass \ of \ whole} *100[/tex]

The part is the carbon, or 12.011 grams.

The whole is the entire compound, CH₄, or 16.043 grams.

[tex]\frac { 12.011 \ g }{ 16.043 \ g} *100[/tex]

[tex]0.748675435*100\\74.8675435[/tex]

Let's round to the nearest hundredth. The 7 in the thousandth place tells us to round the 6 to a 7.

[tex]74.87 \% \ C[/tex]

The mass percent of carbon is 74.87%

Answer:

Natural selection changes how well a species can survive in an environment.

Explanation:

I'm not the best at biology, but natural selection a term we use that's describes nature's way of choosing the strongest to survive. The species with the strongest adaptations will survive while the others will die off. For example, if a school of fish was forced to live in a colder habitat than usual, over many years some fish will adapt to that environment and be able to withstand it. But, some fish won't get those adaptations and be killed off. But, future generations will be born with that ability to withstand the cold environment and it would become normal. So, natural selection changes the way a species lives. Hope this helps

Answer:

Follows are the solution to these question:

Explanation:

Given equation:

[tex]N_2+3H_2 \longrightarrow 2NH_3[/tex]

In this equation:

[tex]1 N_2[/tex] gives [tex]= 2NH_3[/tex]

so,

[tex]3N_2[/tex] gives=  [tex]2 \times 3 = 6 NH_3[/tex]

similarly:

[tex]3H_2[/tex] gives [tex]= 2NH_3[/tex]

So, [tex]6H_2[/tex] gives = [tex]\frac{2}{3}\times 6=4NH_3[/tex]

Its limited reagent is =[tex]N_2[/tex]

The amount of [tex]NH_3[/tex] molecules were formed = 4.

and the amount of  [tex]H_2[/tex] excess molecules are= 1

Answer:

N3F6

Explanation:

Tri- means three so three nitrogens and hexa- means six so six flourines.

Nitrogen and fluorine forms covalent compounds. The formula of one of their compound trinitrogen hexaflouride is N₃F₆.

Covalent compounds are formed by the sharing of electrons between two atoms. Atoms which are electron deficient forms covalent compounds. The number of shared electron is based on the valency of each bonded atom.

Nitrogen is 7th element in periodic table and it have five valence electrons. Thus it needs 3 more electrons to attain stability. Fluorine is 9th element with 7 electrons in its valence shell and it needs one more electron to gain stability.

In the compound trinitrogen hexafluoride, there are three nitrogens and six fluorine. Each nitrogen shares one electron with fluorine and each  fluorine in turn shares its one electron. Thus the formula of the compound is N₃F₆.

To find more about nitrogen compounds, refer the link below:

https://brainly.com/question/25808871

#SPJ2

Answer:

NaCi + LiCl is the correct answer

The pairs of aqueous solutions produce a precipitate is NaCl + LiCl will produce a precipitate.

Aqueous solution is defined as any solution in which water is used to dissolve or break down a substance.

There are basically three types of aqueous solution

Non aqueous solution is defined as a solution formed by dissolving a solute in a solvent other than water.

There are basically four types of non aqueous solution

Thus, the pairs of aqueous solutions produce a precipitate is NaCl + LiCl.

To learn more about aqueous solutions, refer to the link below:

https://brainly.com/question/26856926

#SPJ2

Answer:

Transition metals differ from the non-transition metals such as magnesium in the following ways;

Explanation:

Transition elements comprise of those elements in the d-block of the periodic table and which have incompletely-filled d-orbitals.

The transition elements are all metals and has the characteristic physical properties of metals such as;

However, their chemical properties differ from those of the non-transition metals such as magnesium in the following ways;

Answer:

hello your question is incomplete attached below is missing part

answer : Pauli's exclusion principle

Explanation:

The principle that was disobeyed is Pauli's exclusion principle this is because the  Pauli's exclusion principle states that no two electrons can have the same set of quantum number.

In Box A the two electrons , have the same spin which means  they have the same quantum number ( disobeys Pauli's exclusion principle )

Answer:

Mass of 6.25 moles of copper(II) nitrate = 1025 grams

Explanation:

Let us calculate the molar mass of Copper (II) nitrate

Molecular formula = Ca(NO₃)₂

Atomic mass of Ca = 40 g/mol

Atomic mass of N =14 g/mol

Atomic mass of O = 16 g/mol

molar mass of Ca(NO₃)₂ = 40 + (14 X2) +( 6X16) = 164 g/mol

moles=\frac{mass}{molarmass}moles=

molarmass

mass

therefore

mass = moles X molar mass

mass = 6.25 X 164 = 1025 grams

Answer:

carbon

Explanation:

Many organisms use carbon to make calcium carbonate, a building material of shells and skeletons. Other chemical processes create calcium carbonate in the water. The using up of carbon by biological and chemical processes allows more carbon dioxide to enter the water from the atmosphere.

Answer:

See explanation

Explanation:

Solvolysis is a chemical reaction in which the solvent, such as water or alcohol, is one of the reagents and is present in great excess of that required for the reaction.  The solvents act as or produce electron-rich atoms or groups of atoms (nucleophiles) that displace an atom or group in the substrate molecule(Encyclopedia Britannica).

For the two reactions, the organic product is the same(the product is drawn in the second image attached). The both reactions occur by SN1 mechanism since the substrate is a tertiary alkyl halide. The nucleophile is CH3OH and the rate of reaction depends on the concentration of the alkyl halide and independent of the concentration of methanol present.

Therefore, changing the volume of the solvent has no effect on the rate of reaction. The two reactions proceed at exactly the same rate since the initial concentration of the alkyl halide is the same for both reactions.

Answer:

35.55 to nearest 0.01 or

hundredth place

Answer:

The answer is "Choice A".

Explanation:

In this question, the choice A is wrong because when the copper panels on houses produce a patina (copper oxide) through occur as a consequence of reactions from oxygen and water in the air, these reaction does not have low activation energy because lower activation energy that is stored in a faster response rate.

Answer:

The volume of a krypton atom in liters = 2.86 x 10⁻²⁷ liters

Explanation:

The volume of a sphere is given by the formula below:

V = 4/3 (π)(r³)

where π = 22/7, radius of the krypton atom = 88.00 pm

However, 1 picometre (pm) = 1 x 10⁻¹⁰ cm, converting 88.00 pm to cm will be:

88.00 pm x 10⁻¹⁰ cm/ 1 pm = 88.00 x 10⁻¹⁰ cm

Substituting the values above in order to determine the volume of a krypton atom:

V = 4/3 x (22/7) x (88.00 x 10⁻¹⁰ cm)³

V = 2.86 x 10⁻²⁴ cm³

However, 1000 cm³ = 1 liter

Therefore, 2.86 x 10⁻²⁴ cm³ in liters will be:

2.86 x 10⁻²⁴ cm³/ (1000 cm³/1 liter) = 2.86 x 10⁻²⁷ liters

The volume of a krypton atom in liters = 2.86 x 10⁻²⁷ liters

Answer:

Option C Removing Na₂CO₃

Option E Heating the container.

Explanation:

The equation for the reaction is given below:

2NaHCO₃ (s) <=> Na₂CO₃ (s) + CO₂ (g) + H₂O (g)

Enthalpy change (ΔH) = 136 KJ

To obtain more CO₂ do the following:

1. Add more NaHCO₃

From chemical equilibrium, adding more NaHCO₃ means the reactant has increase. Thus, it (the reactant) will react to form more product (CO₂)

2. Removing any of the products. Removing any of the products implies that more reactants are in the reaction vessel than the product. Thus, the reactants will react to produce more products (CO₂)

3. Heating the container. Heating the container will lead to an increase in the temperature of the reaction. Since the enthalpy change (ΔH) is positive it means the reaction is endothermic. Thus, heating the container i.e increasing the temperature will favours the forward reaction i.e more products will be obtained.

NOTE: Pressure has no effect in the reaction system since there is no gaseous reactants.

Considering the options given above, C and E gives the correct answer to the question.

Answer:

Volume of the bar=10 X 4 X 5=200 cm^3

Mass=200 X 19.3=3,860 grams

Mass=3.86 Kilograms

Explanation:

Answer:

False

Explanation:

Disassociation of Dinitrogen tetraoxide is shown below -

N2O4(g) ⇌ 2NO2(g)

Nitrogen dioxide gas is deep red-orange in color. However, in presence of aerosols, this gas appears reddish-brown in color.

Hence the given statement is False