Given the balanced reaction: Zn + 2HCl H2 + ZnCl2 How many grams of zinc are needed to produce 5 grams of H2?

Answer:

Explanation:  Ethanol, CH3CH2OH, has the highest of the three boiling points because it has the strongest dipole–dipole forces between molecules due to hydrogen bonding. ... Dimethyl ether, CH3OCH3, has the second- highest boiling point because it has dipole–dipole forces between molecules.

Answer:  Unbalanced : H2O

Balanced : 2H2O

Explanation:

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H2O

Explanation:

Water (chemical formula: H2O) is a transparent fluid which forms the world's streams, lakes, oceans and rain, and is the major constituent of the fluids of organisms. As a chemical compound, a water molecule contains one oxygen and two hydrogen atoms that are connected by covalent bonds.

Answer:

Soap that was thrown out

Explanation:

The two main categories of energy are potential energy (stored

energy) and kinetic energy (energy presently doing

work or causing change)...I hope this helps.

Answer:

True

Explanation:

The correct option is - True

Answer:

during interphase the cells start to grow

cells grow, store up energy, and take in nutrients

hope it helped :)

Answer:

By walking and stuff, duh.

Explanation:

We walk, motion.

We drive, motion.

We eat, motion.

We talk, motion.

Answer:

Carbon is moving into the air

Answer: C diamond has a different crystal structure from graphite

Explanation:

The difference between the properties of  two forms of carbon is that

Diamond has a crystal structure  different from graphite.

Graphite and Diamond are known as allotropes of Carbon as they have the

same chemical properties but different crystal structure.

Diamonds form a 3 crystal lattice with no flexibility while Graphite are

bonded to sheets which makes them slide easily within one another and

gives it its soft texture.

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Answer:

If capital R is round, than the RR and Rr will mean round, and the two rr's are wrinkled. that means the answer to both is 50%

Explanation:

hope that helps

Answer:

See explanation

Explanation:

Echo is the reflection of sound waves. Recall that ultrasound are also sound waves of high frequency.

When ultra sound meets an obstacle such as a bone, it is reflected backwards and gives rise to an echo back in the transducer.

Since ultrasound is high frequency sound wave wave; It does not passes through bone due to the high density of the bone, the data required may now be collected.

The balanced chemical equation among the given reactions is:

Sn²⁺ + 2Fe³⁺  →  Sn⁴⁺ + 2Fe²⁺

Therefore, option (C) is correct.

A chemical equation of a reaction can be defined as the representation of a reaction in terms of chemical symbols of the substances used in the given reaction. The number of atoms of substances on the balanced equation is equal on either side of the equation.

According to the law of conservation of mass, while balancing a chemical equation, the total mass (reactant side) should be equal to the total mass (product side) in a chemical equation.

In the given equation, the positive charge on reactant side should be equal to the positive charge on product side.

[tex]Sn^{2+ }+ 2Fe^{3+} \longrightarrow Sn^{4+} + 2Fe^{2+}[/tex]

The two electrons lost by the Sn²⁺ ions get converted into Sn⁴⁺ ions. These two electrons are accepted by two ions of Fe³⁺ and converted into Fe²⁺ ions.

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Answer:

Kp = 0.949

Explanation:

Hello there!

In this case, according to the given chemical reaction:

[tex]2SO_2(g) +O_2(g) \rightleftharpoons 2SO_3(g)[/tex]

It is possible to set up the equilibrium expression as shown below:

[tex]Kp=\frac{p_{SO_3}^2}{p_{SO_2}^2p_{O_2}}[/tex]

Whereas the initial pressure of SO2 was 3.43 atm and that of O2 was 1.61 atm. Now, since the partial pressure of O2 decreased to the 0.809 atm, it is possible to calculate the change in the pressure of O2 via:

[tex]x=1.61atm-0.809atm=0.801atm[/tex]

Which is actually applied to SO3 and SO2 according to the stoichiometry in the equilibrium expression to calculate Kp:

[tex]Kp=\frac{(2*x)^2}{(3.43-2x)^2(0.809)}[/tex]

Thus, by plugging in x, we obtain:

[tex]Kp=\frac{(2*0.801)^2}{(3.43-2*0.801)^2(0.809)}\\\\Kp=0.949[/tex]

Best regards!

Nitrogen reacts with Hydrogen to form Ammonia gas by Haber's Process.

N₂ + 3H₂ → 2NH₃

This law states that Mass can neither be created, nor destroyed and it can just be transformed from one form to another. This law has application as balancing of the reaction.

Balancing of a reaction is done according to the "Law of conservation of mass" and balancing helps in solving stoichiometry questions correctly as if we will not balance the reaction then the quantitative results in a particular question doesn't come correctly.

Balancing of a reaction helps in mole concept as well and it is one of the laws of chemical reactions as well.

Some examples of balanced chemical reaction are-

2Mg(s) + O₂(g) ⟶ 2MgO(g)

According to the given picture,

Correct option is C. It consists 1 molecule of Nitrogen gas, 3 moles of Hydrogen gas and 2 moles of Ammonia gas.

Therefore, Nitrogen reacts with Hydrogen to form Ammonia gas by Haber's Process.

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Answer:

ano po ito?? isa po ba itong story

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} [/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{3.86 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{3.86}{6.02} \\ = 0.641196...[/tex]

We have the final answer as

Hope this helps you

Answer:

29.47 g of AlCl₃.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

2Al + 3Cl₂ —> 2AlCl₃

Next, we shall determine the mass of Al that reacted and the mass of AlCl₃ produced from the balanced equation. This can be obtained as follow:

Molar mass of Al = 27 g/mol

Mass of Al from the balanced equation = 2 × 27 = 54 g

Molar mass of AlCl₃ = 27 + (35.5× 3)

= 27 + 106.5

= 133.5 g/mol

Mass of AlCl₃ from the balanced equation = 2 × 133.5 = 267 g

SUMMARY:

From the balanced equation above,

54 g of Al reacted to produce 267 g of AlCl₃.

Finally, we shall determine the mass of AlCl₃ produced by the reaction of 5.96 g of Al. This can be obtained as follow:

From the balanced equation above,

54 g of Al reacted to produce 267 g of AlCl₃.

Therefore, 5.96 g of Al will react to produce = (5.96 × 267)/54 = 29.47 g of AlCl₃.

Thus, 29.47 g of AlCl₃ were obtained from the reaction.

Answer:

4 a minor but very important component of the atmosphere corban dioxide is released through natural processes such as reputation.;

Explanation:

a minor but very important component of the atmosphere corban dioxide is released through natural processes such as reputation

Answer:  The chemical formula of the gas is Xenon.

Explanation:

From Graham's law of effusion rates, the rate of effusion of a gas is inversely proportional to the square root of its molar mass.

[tex]\frac{rate_1}{rate_2}=\sqrt{\frac{M_2}{M_1}}[/tex]

Given: Rate of unknown gas = [tex]0.392\times R_{Ne}[/tex]  

Putting the values in the formula:

[tex]\frac{rate_X}{rate_{Ne}}=\sqrt{\frac{M_{Ne}}{M_X}}[/tex]

[tex]0.392=\sqrt{\frac{20.17}{M_X}}[/tex]

Squaring both sides:

[tex]0.154=\frac{20.17}{M_X}[/tex]

[tex]M_X=131g/mol[/tex]

As Xenon (Xe) has molar mass of 131g/mol, Thus the chemical formula of the gas is Xenon.

Answer:

30.1 g NaCl

Explanation:

Your first conversion is converting grams NaOH to moles of NaOH using its molar mass (39.997 g/mol). Then, use the mole ratio of 1 mol NaCl for every 1 mol NaOH to get to moles of NaCl. Then finally multiply by the molar mass of NaCl (58.44 g/mol) to get grams of NaCl.

20.6 g NaOH • (1 mol NaOH / 39.997 g NaOH) • (1 mol NaCl / 1 mol NaOH) • (58.44 g NaCl / 1 mol NaCl) = 30.1 g NaCl

Answer:

GIVEN IT'S A MULTI CHOICE QUESTION:

1. False

2. True

3. False

4. True

IF ITS NOT

2

Explanation:

We haven't made human clones because human cloning is extremely controversial and many people believe it is unethical.

Cloning is a genetic technique that can be used to reproduce genetically identical organisms in a laboratory.

In conclusion, we haven't made human clones because human cloning is extremely controversial and many people believe it is unethical.

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Answer:

To split an atom a neutron, traveling at an accurate speed must be shot at the nucleus.

Explanation:

Answer:

[tex]T_2=-53.15\°C[/tex]

Explanation:

Hello there!

In this case, in agreement to the Charles' law which states that the volume and temperature relate to each other via a directly proportional relationship at constant pressure, we can write:

[tex]\frac{T_2}{V_2} =\frac{T_1}{V_1}[/tex]

Thus, given V1, V2 and T1 (310 in Kelvin), we can solve for the final temperature as shown below:

[tex]T_2=\frac{T_1V_2}{V_1} \\\\T_2=\frac{310K*32.5mL}{45.8mL}\\\\T_2=220 K-273.15K\\\\T_2=-53.15\°C[/tex]

Best regards!

Answer:

Heat reaction

Explanation:

Heat must be applied in order to melt a substance.

Answer:

True

Explanation:

Answer:

Because the weather is complex and dynamic.

Explanation:

Answer:

C. Precipitation

It made me put more on my answer.

Answer: The empirical formula and the molecular formula of the hydrocarbon is [tex]C_2H_3[/tex] and [tex]C_4H_6[/tex] respectivley.

Explanation:

The chemical equation for the combustion of hydrocarbon having carbon, hydrogen and oxygen follows:

[tex]C_xH_y+O_2\rightarrow CO_2+H_2O[/tex]

where, 'x', 'y'  are the subscripts of Carbon, hydrogen

We are given:

Mass of [tex]CO_2[/tex] = 12.74 g

Mass of [tex]H_2O[/tex]= 3.913 g

Molar mass of carbon dioxide = 44 g/mol

Molar mass of water = 18 g/mol

For calculating the mass of carbon:

In 44g of carbon dioxide, 12 g of carbon is contained.

So, in 12.74 g of carbon dioxide, =[tex]\frac{12}{44}\times 12.74=3.474g[/tex] of carbon will be contained.

For calculating the mass of hydrogen:

In 18g of water, 2 g of hydrogen is contained.

So, in 3.913 g of water, =[tex]\frac{2}{18}\times 3.913=0.435g[/tex] of hydrogen will be contained.  

Mass of C = 3.474 g

Mass of H = 0.435 g

Step 1 : convert given masses into moles.

Moles of C =[tex] \frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{3.474g}{12g/mole}=0.289moles[/tex]

Moles of H=[tex]\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{0.435g}{1g/mole}=0.435moles[/tex]

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C =[tex]\frac{0.289}{0.289}=1[/tex]

For H =[tex]\frac{0.435}{0.289}=1.5[/tex]

The ratio of C : H = 1: 1.5

The whole number ratio will be = 2: 3

Hence the empirical formula is [tex]C_2H_3[/tex].

The empirical weight of [tex]C_2H_3[/tex] = 2(12.01)+3(1.008)= 27.04 g.

The molecular weight = 54.09 g/mole

Now we have to calculate the molecular formula.

[tex]n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{54.09}{27.04}=2[/tex]

The molecular formula will be=[tex]2\times C_2H_3=C_4H_6[/tex]

Answer: The rate increases 3 times on raising the temperature from 20degree to 30 degree​

Explanation:

According to Arrhenius equation with change in temperature, the formula is as follows.

[tex]ln \frac{k_{2}}{k_{1}} = \frac{-E_{a}}{R}[\frac{1}{T_{2}} - \frac{1}{T_{1}}][/tex]

where [tex]k_2[/tex] = rate constant at temp [tex]T_2[/tex]

[tex]k_1[/tex] = rate constant at temp [tex]T_1[/tex]

[tex]E_a[/tex]= activation energy

R= gas constant

[tex]T_1[/tex]= temperature = [tex]20^0C=(20+273)K=293K[/tex]

[tex]T_2[/tex]= temperature = [tex]30^0C=(30+273)K=303K[/tex]

[tex]ln \frac{k_{2}}{k_{1}} = \frac{-85\times 1000J/mol}{8.314J/Kmol}[\frac{1}{303} - \frac{1}{293}][/tex]

[tex]ln \frac{k_{2}}{k_{1}}=1.15[/tex]

[tex]\frac{k_{2}}{k_{1}}=3[/tex]

Thus rate increases 3 times on raising the temperature from 20degree to 30 degree​