What are two ways continents can grow?

2Na + 2H2O → 2NaOH + H2

The balanced equation

Answer:

B

Explanation:

The electrons in all noble gases are filled with electrons and don't need to involve in a reaction to gain or loss

The answer A is wrong because not all of them has same number of protons equal the neutrons

Answer C is wrong because we can see helium with 2 electrons in outer shell

and Answer D is wrong as we say above each atom doesn't need to react with another to be stable

Answer:

The element that is commonly used to reduce iron oxide would be carbon.

Explanation:

:)

Iron oxide is reduced to a lower oxide or metal by gaseous carbon monoxide or solid carbon.

Reduction is defined as the chemical reaction which involves addition of hydrogen or removal of oxygen or gain of electrons.

For example,

2Na + H2 → 2NaH (addition of hydrogen)

CuO + H2 → Cu + H2O(removal of oxygen)

Fe3+ + e- → Fe2+ (gain of electron)

Above example of reduction reaction is when oxygen reacts with iron to form rust. In this reaction oxygen is reduced because it accepts electrons from iron, which is oxidized.

Thus, Iron oxide is reduced to a lower oxide or metal by gaseous carbon monoxide or solid carbon.

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Answer:

A. Things are measured the same way each time.

Explanation:

Answer:

diseases where microbes are the immediate cause are called infectious diseases. Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful.

The molar mass of the gas that has a mass of 3.82 g and occupies a volume of 0.854 L is 106.66g/mol.

The molar mass of a substance can be calculated by dividing the mass of the substance by its number of moles.

However, the number of moles of the gas in this question needs to be calculated first using the ideal gas law equation:

PV = nRT

Where;

1.04 × 0.854 = n × 0.0821 × 302

0.888 = 24.79n

n = 0.888/24.79

n = 0.036mol

Molar mass of gas = 3.82g/0.036mol

Molar mass = 106.66g/mol

Therefore, the molar mass of the gas that has a mass of 3.82 g and occupies a volume of 0.854 L is 106.66g/mol.

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Answer:

This is my own explanation:

Explanation:

It is important to know the mixtures you input together because you may determine the type of substance you produced from different elements and several combinations of matter. This assists in identifying your specific substance.

Answer:

24.7

Explanation:

Answer: ~24.72in

Explanation:

1 inch = 2.54 centimeters

divide 62.8cm by 2.54 which gives us approximately 24.72in.

hope this helped! ♡

The reaction equation must first be put down and the stiochiometry is used to calculate the mass of the bicarbonate produced as 0.11 g.

A reaction refers to the transformation of reactants into products. We have the equation of this reaction as;

CO2 + H2O ---->H2CO3

If 1 mole of CO2 gas occupies 22400mL

x moles of CO2 occupies 40 mL

x = 0.0018 moles

If 1 mole of CO2 yields 1 mole of bicarbonate

0.0018 moles yields 0.0018 moles of bicarbonate

Mass of bicarbonate = 0.0018 moles * 61 g/mol = 0.11 g

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Apply Charles law

[tex]\\ \bf\bull\rightarrowtail V1T2=V_2T1[/tex]

[tex]\\ \bf\bull\rightarrowtail 10(20)=25V_2[/tex]

[tex]\\ \bf\bull\rightarrowtail 200=25V_2[/tex]

[tex]\\ \bf\bull\rightarrowtail V_2=8L[/tex]

Answer:

hope it's helpful to you

Balanced equation: 2 HI --> I2 + H2

Explanation:

HI-

H = 1 x 2 = 2

I = 1 x 2 = 2

H2-

H = 2

I = 2

Is this a true or false question? If so, then this would be a true statement. Synthetic materials are made in factories, and the usage of factories increases the risks of harmful gases and chemicals that negatively impacts Earth.

It is generally true that as consumption of a synthetic material increases, the associated negative impacts to Earth needed to produce the material also increase.

This is because the production of synthetic materials often requires the extraction and processing of non-renewable resources, such as petroleum, which can have a range of negative environmental impacts, including habitat destruction, air and water pollution, and greenhouse gas emissions.

Additionally, the disposal of synthetic materials can also lead to environmental problems, such as the accumulation of non-biodegradable waste in landfills and oceans.

However, it is important to note that not all synthetic materials have the same environmental impacts, and some materials may be more sustainable than others depending on their production methods and intended use. Hence, the given sentence is true.

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Your question is incomplete, most probably the full question is this:

True or false. As consumption of a synthetic material increases, the associated negative impacts to Earth required to produce the material increase.

acidic in naturenature

Generally, Oxides of non-metals are acidic in nature. When non-metals are reacted with water it forms an acidic solution. The common oxides of Sulphur, Selenium, and Bromine are strongly acidic.

From the table showing the data involving the neutralization reaction between HCl and NaOH, the concentration of the HCl solution would be 0.864 M

From the available data:

Volume of acid used = 0.0351 - 0.0131 = 0.022 L

Volume of base used = 0.0575 - 0.0385 = 0.019 L

Concentration of base = 1.00 M

Number of moles of acid and base = 1

Using the equation:                      CaVa/CbVb = Na/Nb = 1

Ca = 1x0.019/0.022 = 0.864 M

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Answer: Chlorine gas is produced when sulfuric acid is mixed with chlorine bleach.

Explanation:  This reaction is a function of the change in pH of the solution from alkaline to acidic combined with the strong oxidant properties of hypochlorous acid.

114°

Explanation:

ΔE = mcΔT

ΔE = 5(0.38)(80 - 20)

ΔE = 1.9(60)

ΔE = 114°

Answer:

covalent bond- a chemical bond that is the sharing of electron pairs between atoms

Answer:

300

Explanation:

because it's not highly concentrated

Based on the functional groups present in organic compounds, the compound formed from adding hydroxy and hydrogen substituents to carbon atoms is an alcohol.

Alcohols are organic compounds whose functional group is the hydroxy radical.

The simplest alcohol is methanol whose molecular formula is CH3OH.

The hydroxy group in alcohols are responsible for their properties such as:

Therefore, the compound formed from adding hydroxy and hydrogen substituents to carbon atoms is an alcohol.

The partial pressure is the pressure exerted by a single gas in a volume of the mixture. The partial pressure of dihydrogen is 737.5 mmHg.

According to Dalton's law, the sum of partial pressure of non-reacting gases gives the total pressure of the system.

Given,

Total pressure = 755.0 mmHg

The partial pressure of water = 17.5 mmHg

The partial pressure of dihydrogen = ?

The partial pressure of dihydrogen is calculated as:

[tex]\begin{aligned}\rm p_{total} &= \rm p_{H_{2}O} + p_{H_{2}}\\\\755.0 &=\rm 17.5 + p_{H_{2}}\\\\&= 737.5 \;\rm mmHg\end{aligned}[/tex]

Therefore, the partial pressure of dihydrogen is 737.5 mmHg.

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Answer:

Explanation:

Explanation:

CO2 is called as gas because it exist in single thermodynamics state i.e CO exist in gases state only at room temperature.

Even a small increase can have devastating effects on coastal habitats farther inland, it can cause destructive erosion, wetland flooding, aquifer and agricultural soil contamination with salt, and lost habitat for fish, birds, and plants.

Explanation:

I hope this helps

Answer:

I recently answered this question. The response I submitted is included below. I beleive my answer should be correct.

Explanation:

Question 1:

C: 48.38g(1mol/12g) = 4.0317 

H: 8.12g(1mol/1.01g) = 8.12

O: 53.5g(1mol/16g) = 3.34375

Divide by the smallest amount (3.34375)

C = 4.0317/3.34375 = 1.206 = 1

H = 8.12/3.34375 = 2.42 = 2

O = 3.34375/3.34375 = 1

Empirical formula = CH2O

Question 2:

Molecular formula = n(empirical formula)

n = molar mass (compound)/molar mass (empirical)

Empirical formula: CH2O

Molar mass of CH2O = 12 + 2x1 + 16 = 30 g/mol

Molar mass of compound: 180.15 g/mol

[tex]n=\frac{180.15g/mol}{30g/mol}= 6[/tex]

Molecular formula = C6H12O6

The molarity of the NaCl in the 250 ml slat solution is 2.8M.

The molarity of a solution is defined as the concentration of a solute per unit volume of the solution.

Given, the volume of the solution is 250 ml converted into l 0.25

The number of moles of NaCl is 0.70.

By the formula  of molarity

[tex]M = \dfrac{n}{V}\\\\\\M = \dfrac{0.70}{0.25} = 2.8 M[/tex]

Thus, the molarity is 2.8 M.

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Saturated solution refer to a solution in which the dissolved solute is in equilibrium with the undissolved solute.

A saturated solution is a chemical solution that contain maximum amount of a solute which is dissolved in the solvent. The addition of anotheg solute will not dissolve in a saturated solution. The amount of solute that can be dissolved in a solvent to form a saturated solution depends on a variety of factors.

Therefore, Saturated solution refer to a solution in which the dissolved solute is in equilibrium with the undissolved solute

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The term that describes a solution in which the dissolved solute is in equilibrium with the undissolved solute is saturated solution.

A saturated solution is one in which there is so much solute that it would not dissolve if there was anymore.

When a saturated solution comes into contact with more solute, the extra solute does not dissolve or deposit.

Thus, the term that describes a solution in which the dissolved solute is in equilibrium with the undissolved solute is saturated solution.

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Answer/Explanation:

Stars spend the majority of their lifespan medling hydrogen nuclei together to form helium. When the hydrogen that in the core of the star begins to run out, the star will start using hydrogen away from its core and this is what causes the star's outer layer to expand and slowly cool down.

I hope this helps!

-No one

Because gathering it leaves a negative impact on natural habitats.

Answer:

Three principal theories about acid-base are,

1. Arrhenius theory

2. Bronsted-Lowry theory

3. Lux-Flood definition

4. Lewis theory

5. Usanovich definition

1. According to the Arrhenius, acids give up hydrogen ion in aqueous medium and a base give up hydroxyl ion in its aqueous medium. Examples are aqueous solution of HCl, CH3COOH, PhCOOH, and H2SO4. These give up H+ in an aqueous medium. Aqueous solutions of NaOH, Ca (OH)2 are Arrhenius bases.

Arrhenius theory has some limitations. This theory cannot explain the acidic nature of BF3 or basic behavior of NH3. This theory fails to give any explanation about acidity and basicity which does not produce H+ and OH- in their aqueous solutions.

2. According to the Bronsted-Lowry, an acid releases proton and a base accepts proton. NH3 accepts proton and forms ammonium ion, so ammonia acts as a base.

But this theory also has limitations. According to this theory acidic behavior of BF3 still cannot be explained.

3. Lux-Flood describes the acid-base theories based on oxide ion transformation. It gives clear explanation for acid-bases theories of non-protonic system. According to them, a base will donate the oxygen atom and an acid will accept oxygen atom.

4. According to the Lewis theory, acids are those substances which accept electron pair and base are those substances which donates electron pairs. Lewis theory can explain the acidic nature of BF3. In BF3, B is two electrons short to fulfil its octet. So it can accept a pair of electrons from an electron donating substituent. So it is an electron pair acceptor compound and acts as an acid.

Substances which have π electrons can donate electron pair to an electron deficient substance and acts as a base. Ethylene and acetylene is Lewis bases. AlCl3, PCl3 are Lewis acids.

5. According Usanovich, an acid is some chemical species which would react with bases and yields cations or accepts anions or electrons. A base is some chemical species which would react with acids, yield anions or electrons or combine with cations.

Explanation:

The atom that moves at its rms velocity at 100°C with a wavelength of 2.31 * 10 m is : SULPHUR ( s )

To determine the atom we will have to determine the molar mass of the atom

Applying De Broglie equation

λ = h / mv

Vrms = [tex]\sqrt{\frac{3RT}{M} }[/tex]  ---- ( 1 )

Where : λ  = 2.31 * 10⁻¹¹,  R = 8.314 J / k.mol,  T = 373 K, h = 6.626 * 10⁻³⁴ J.s

From equation ( 1 )

M = ( h² Ua ) / 3RT*λ² --- ( 2 )

where : Ua ( mass of an atom ) = 6.022 * 10²³,  h = 6.626 * 10⁻³⁴,  R = 8.314 J / k.mol, λ  = 2.31 * 10⁻¹¹,    T = 373 K

Insert values into equation ( 2 )

M ( molar mass ) = 32 g/mol

Sulphur has a molar mass of 32 g/mol therefore the atom is sulphur.

Hence we can conclude that The atom that moves at its rms velocity at 100°C with a wavelength of 2.31 * 10 m is : SULPHUR ( s ).

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