2 Which two substances cause iron to rust?

Answer:

Explanation:

honesty i just know it has to be b or d because bases don’t donate. acids donate.

Substance A is mixed with water and donates 0.4% of its H⁺ ions, therefore given substance is a weak acid & show poor conduction of electric current.

According to the Arrhenius theory of acids and bases, acids are those species which gives H⁺ ion to the solution.

In the question it is given that, substance A is mixed with water and it donates H⁺ ion, from this it is clear that given substance is acid. It is also mention that it donates only 0.4% of its H⁺ ion means partial dissociation is observed, so we conclude that this acid is weak in nature. And due to weak dissociation and less number of available H⁺ ion it did not conduct electricity effectively.

Hence, option (D) is correct i.e. it is weak acid and a poor conductor of electric current.

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Answer:there are 44 grams

Answer:

B. 10%

Explanation:

mitochondria

im not 100% sure but it makes sense

Answer:

1 Al + 1 Cl -> 1 AlCl

Explanation:

It is already balanced.

Answer:

[tex]6molCO_2[/tex]

Explanation:

Hello there!

In this case, according to the described reaction, we can set up the chemical equation as shown below:

[tex]NaHCO_3+CH_3COOH\rightarrow CO_2+H_2O+CH_3COONa[/tex]

We can evidence the 1:1 mole ratio of baking soda (NaHCO3) to CO2 and therefore the produced moles of latter are calculated as shown below:

[tex]6molNaHCO_3*\frac{1molCO_2}{1molNaHCO_3} \\\\6molCO_2[/tex]

Best regards!

Answer:

Explanation:

minimizing environmental effects.

ensuring public health and safety.

preserving water quality.

establishing new landforms and vegetation.

removing waste and hazardous material.

stabilizing land to protect against erosion.

Answer:

Option C - 1 mole

a) no of moles of solute = 4.1×0.05

moles = O.205

so the mass of of sodium chloride present is 0.205×58.44

Mass of NaCl = 11.98 g

b) no of moles of solute = 1.8×0.01= 0.018

so the mass of of sodium chloride present is 0.018×58.44

Mass of NaCl = 1.05g

C) number of moles of solute is 1 mole

mass of solute is =58.44g

d) mass =9.35g

So the conclusion is that 1 mole is the correct answer!!!!

Answer:

protons and neutrons

Explanation:

The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).

Answer:

We can solve this by the method of which i solved your one question earlier

so again here molar mass of C12H25NaSO4 is 288.372 and number of moles for 11900 gm of C12H25NaSO4 will be = 11900/288.372

which is almost = 41.26 moles

so to get one mole of C12H25NaSO4 we need one mole of C12H26O

so for 41.26 moles of C12H25NaSO4 it will require 41 26 moles of C12H26O

so the mass of C12H26O = 41.26× its molar mass

C12H26O = 41.26×186.34

= 7688.38 gm!!

so the conclusion is If you need 11900 g of C12H25NaSO4 (Sodium Lauryl Sulfate) you need C12H26O 7688.38 gm !!

Again i d k wether it's right or wrong but i tried my best hope it helped you!!

Answer:

d

Explanation:

they would all have the same volumes

Answer:

the concentration of the solution is 2 mol/L.

Explanation:

Molarity is defined as the concentration of a solution expressed in terms number of moles of solute per liter of solution.

Mathematically Molarity is expressed as follow;

[tex]Molarity = \frac{Moles \ of \ solute}{Liters \ of \ solution} \\\\[/tex]

Given;

Volume of the solution, V = 0.45 L

Moles of the solute, n = 0.9 moles

The concentration of the solution [tex]= \frac{0.9}{0.45} = 2 \ mol/L[/tex]

Therefore, the concentration of the solution is 2 mol/L.

Hydrogen

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Hydrogen-1 serves as the starting reactant in fusion reactions in the sun. This is due to the sun's composition, which is around 70% hydrogen and 28% helium with 2% heavier components. As a result, hydrogen-1 is both the most prevalent and most likely to be employed in a fusion process in the sun.

Two hydrogen-1 nuclei are fused together to create a helium-4 nucleus in the sun's fusion reaction, which releases energy in the process. This is the most significant energy source in the sun and is known as the proton-proton chain reaction.

When two hydrogen-1 nuclei collide to generate a deuterium nucleus, a gamma ray is released as a result, starting the reaction. Then, this deuterium nucleus strikes another.A helium-3 nucleus is created from a hydrogen-1 nucleus, which also produces a gamma ray.

The reaction is finally finished when two helium-3 nuclei meet to produce a helium-4 nucleus, producing two gamma rays in the process. Since hydrogen-1 is the most prevalent element in the sun and the element that is most likely to be employed in the proton-proton chain reaction, it is the first reactant for a fusion process in the sun.

A deuterium nucleus is created by the collision of two hydrogen-1 nuclei, which is followed by a sequence of further processes that ultimately result in the development of a helium-4 nucleus.  

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Answer:

0.347

Explanation:

moles= mass/molecular mass

moles= 34/64+(16×2)+(1×2)

moles=34/98

= 0.347 (3.s.f)

Answer:

D)

Explanation:

seems like the most logical option out of all listed.

Answer:

The total mass will be same of both side!!!!! ig so

Answer: The volume for this gas is 0.732 L.

Explanation:

Given : No. of moles = 0.582 mol

Temperature = [tex]15^{o}C = (15 + 273) K = 288 K[/tex]

Pressure = 18.8 atm

Using the ideal gas equation, volume for the given gas is calculated as follows.

PV = nRT

where,

P = pressure

V = volume

n = number of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula.

[tex]PV = nRT\\18.8 atm \times V = 0.582 mol \times 0.0821 L atm/mol K \times 288 K\\V = \frac{0.582 mol \times 0.0821 L atm/mol K \times 288 K}{18.8}\\= \frac{13.761}{18.8}\\= 0.732 L[/tex]

Therefore, it can be concluded that the volume for this gas is 0.732 L.

Answer:

Pour the filtrate into an evaporating basin. Heat the salt solution gently until it starts to decrepitate .keep eye protection on and do not get too close. Turn off the Bunsen burner and let the damp salt dry in the dish

In evaporation particles of water take energy in the form of sunlight from the surrounding and then convert into vapor phase. Therefore heating is the only technique for getting pure salt.

Evaporation is a physical process in which the water in liquid state converts to gaseous state at the temperature below its boiling point. Evaporation happens before the boiling process.

Evaporation causes cooling effect in the surrounding. During summer when water is kept in earthen pot water cools, this is because of the evaporation process.

Evaporation is affected by temperature. As the temperature increases the rate of evaporation increases and hence in summer there is more evaporation and hence there is lot more water in air.

Pour the filtrate into an evaporating basin. Heat the salt solution gently until it starts to decrepitate .Turn off the Bunsen burner and let the damp salt dry in the dish.

Therefore heating is the only technique for getting pure salt.

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Answer:

D

Explanation:

Substance A is mixed with water and donates 0.4% of its H⁺ ions, therefore given substance is a weak acid & show poor conduction of electric current.

According to the Arrhenius theory of acids and bases, acids are those species which gives H⁺ ion to the solution.

In the question it is given that, substance A is mixed with water and it donates H⁺ ion, from this it is clear that given substance is acid. It is also mention that it donates only 0.4% of its H⁺ ion means partial dissociation is observed, so we conclude that this acid is weak in nature. And due to weak dissociation and less number of available H⁺ ion it did not conduct electricity effectively.

Hence, option (D) is correct i.e. it is weak acid and a poor conductor of electric current.

To know more about acids, visit the below link:

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Answer:

I don't have any idea of this question

Answer:

0.897

Explanation:

Answer:

I think it's c

Explanation:

because matter and energy come from water I think

Answer:

the IUPAC name of the following compound is 2,3 dimethyl pentane!

Explanation:

sweet,sour,salty, savoury

Answer: bitter

Explanation:

Answer:

0.208 mol

Explanation:

Assuming the gas sample behaves like an ideal gas, we can solve this problem by using the following formula:

Where:

We input the data:

And solve for n:

Answer:

C)

Explanation:

They can move at rates of up to four inches (10 centimeters) per year, but most move much slower than that. Different parts of a plate move at different speeds. The plates move in different directions, colliding, moving away from, and sliding past one another. Most plates are made of both oceanic and continental crust.

Answer:

If the water velocity decreases, the rate of erosion increases

Explanation: