What is the mass of 0.25mol of NO3- ions/nitrate ions

The Number of moles present is 0.5mol.

What is ideal gas law?

The general gas equation, also known as the ideal gas law, is the equation of state for a fictitious ideal gas. The equation for the ideal gas's relationship to pressure P, volume V, temperature T, and number of moles n is known as the ideal gas law.

Use P V = n R T 

R = 0.08206 L -atm /mol -K when the pressure is in atmosphere atm, the volume is in litres L, and the temperature is in Kelvin K.

One atm is equal to 760.0 mm Hg, so depending on how the pressure changes, there will either be a division or multiplication.

Divide the value in mmHg by 760.0 mmHg/atm to convert it to atm.

P= 912mmHg /760mmHg/atm=1.2atm

to convert °C to kelvin,

  K=°C +273= 20+273=293K

R=0.08206

Add these values to given equation,

n=PV/RT

 = 1.2×10÷0.08206×293

 = 12÷24.02

 =0.5mol

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Answer: im pretty sure it is b but a is also good  i going to be honest it a multi chose and i ant good at those

Explanation:

The statement “The products obtained by the acid-catalyzed hydration of 1-methylcyclohexene and methylenecyclohexene are identical” is not true.

Acid-catalyzed hydration is a chemical reaction that transforms an alkene to an alcohol by adding water.

For instance, in the following reaction, 2-methylpropene reacts with water, with the aid of sulfuric acid, to give the alcohol tert-butyl alcohol.

In general, acid-catalyzed hydration of an alkene takes place via a mechanism known as a Markovnikov addition. When an unsymmetrical alkene is hydrated using H2SO4 and H2O, a mixture of products is usually produced. This is because of the differing stabilities of the carbocation intermediates formed during the reaction. This is referred to as carbocation rearrangement.

A simple example of carbocation rearrangement can be seen in the hydration of 1-methylcyclohexene. It produces two isomeric products: 1-methylcyclohexanol and 3-methylcyclohexanol.

Methylcyclohexene undergoes acid-catalyzed hydration to form a mixture of 1-methylcyclohexanol and 3-methylcyclohexanol. Methylenecyclohexene, on the other hand, yields only cyclohexanol during hydration.

Thus, the given statement is false.

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The substances that are bases are: b) RBOH (where R represents any organic group) and d) Ca(OH)2 (calcium hydroxide)

Bases are defined as substances that can accept or donate a pair of electrons (according to the Bronsted-Lowry definition) or substances that can produce hydroxide ions (according to the Arrhenius definition).

In the given options, RBOH is a general formula for any organic base, and Ca(OH)2 is a strong base used in various industrial processes.

HCOOH, H2CO3, NaNO3, and HNO3 are not bases as they do not fit the criteria mentioned above. HCOOH (formic acid) and H2CO3 (carbonic acid) are weak acids, NaNO3 (sodium nitrate) is a salt, and HNO3 (nitric acid) is a strong acid.

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The neutral atom with an atomic number of 1 and a mass number of 1 is Hydrogen (H).

The neutral atom with an atomic number of 11 and a mass number of 23 is Sodium (Na).

The neutral atom with an atomic number of 7 and a mass number of 14 is Nitrogen (N).

The atomic number of an element corresponds to the number of protons in its nucleus, which determines its identity. The mass number represents the total number of protons and neutrons in an atom.

For the first atom, with an atomic number of 1 and a mass number of 1, there is only one proton and no neutrons, which corresponds to Hydrogen (H).

The second atom, with an atomic number of 11 and a mass number of 23, has 11 protons and 12 neutrons. This corresponds to the element Sodium (Na).

The third atom, with an atomic number of 7 and a mass number of 14, has 7 protons and 7 neutrons, which corresponds to Nitrogen (N).

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200 sec or 3 min 20 msec

we need to get to class, 300 meters away,

so the distance becomes = 300 m

we can only walk in the hallways at about 1.5m/s

so the time become = 1.5m/s

time will it take to get to our class

time = distance/speed

time = 300/1.5

time = 200 sec or 3 min 20 msec

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Answer:

Amount of NH3 in g = 0.0867 g

Explanation:

Molecular mass of

0.0051 mol has same no. of molecules in both NH3 and SF6.

Amount of NH3 in g = Mole × Molar mass

Molar mass of NH3 = 17.00 g/mol

Amount of NH3 in g = 0.0051 × 17.00

                                 = 0.0867 g

The elements are the present in this mixture is the A and D. The correct option is 1.

The bright line spectrum that is produced by the four elements with the are in the below picture. The bright line spectrum is the spectrum when created is when the beam of the light passes through the sample that is analyte sample that is some of the wavelengths of the light that are absorbed through the atoms with the sample. Thus, the electrons in the atoms will get to the excited state.

Therefore, the bright line spectrum of the mixture formed by the two elements are A and the D. The option 1 is correct.

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Answer:

1.50 × 10²⁴ atoms C

Explanation:

Step 1: Define

Molar mass of C - 12.01 g/mol

Avagadro's Number: 6.02 × 10²³ atoms, molecules, formula units, etc.

Step 2: Use Dimensional Analysis

\(30.0 \hspace{3} g \hspace{3} C(\frac{1 \hspace{3} mol \hspace{3} C}{12.01 \hspace{3} g \hspace{3} C} )(\frac{6.02(10)^{23} \hspace{3} atoms \hspace{3} C}{1 \hspace{3} mol \hspace{3} C} )\) = 1.50375 × 10²⁴ atoms C

Step 3: Simplify

We are given 3 sig figs.

1.50375 × 10²⁴ atoms C ≈ 1.50 × 10²⁴ atoms C

The approximate volume of a 0.120 M solution that contains 10.0 g of copper(II) sulfate, CuSO4 is 522.14mL.

Volume = no. of moles ÷ molarity

The no. of moles of CuSO4 = 10g ÷ 159.61g/mol = 0.063mol

Volume = 0.063 ÷ 0.120

Volume = 0.522L

Volume in milliliters = 522.14mL

Therefore, the approximate volume of a 0.120 M solution that contains 10.0 g of copper(II) sulfate, CuSO4 is 522.14mL.

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Answer:

c lined with aluminum foil

Answer: white blood cells

Explanation: they protect you from illnesses and diseases

Answer:

pretty sure -10 degrees

Explanation:

no explanation

Answer:

D.) kilograms and cubic millimetres

Explanation:

Answer:

There are 0.1 moles of solute in 250 mL of 0.4 M solution

Explanation:

because it is

Answer: A

Explanation:

trust me i did it

Answer:

The mass of 21.05 moles of iron(III) sulfide is 4,372.085 grams.

Explanation:

Iron (III) sulfide is a chemical compound with the formula Fe₂S₃.

Being the molar mass of the elements:

then the molar mass of iron sulfide (III) is:

Fe₂S₃= 2* 55.85 g/mole + 3* 32 g/mole=  207.7 g/mole

Molar mass is the amount of mass that a substance contains in one mole. Then the rule of three can be applied: if in 1 mole of iron (III) sulfide there are 207.7 grams, in 21.05 moles how much mass is there?

\(mass=\frac{21.05 moles*207.7 grams}{1 mole}\)

mass= 4,372.085 grams

The mass of 21.05 moles of iron(III) sulfide is 4,372.085 grams.

In each pair, the solution that contains the weaker conjugate acid is more basic. Without any calculations, we can determine which solution is more basic by identifying the stronger conjugate acid in each pair.

In Part A, KClO is a stronger acid than NaF, so the solution in (b) is more basic in Part B, NaBrO is a stronger acid than NaBr, so the solution in (b) is more basic in Part C, HNO2 is a weaker acid than KOH, so the solution in (b) is more basic in Part D, NH4Cl is a weaker acid than HCN, so the solution in (a) is more basic.

It is important to note that while we did not perform any calculations, this method only works for comparing solutions with the same concentration. If the concentrations were different, we would need to perform calculations to determine which solution is more basic. A

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The pH and the pOH of an aqueous solution that is 0.045 M in HCl(aq) and 0.095 M in HBr(aq) at 25 °C is 1.35, and 12.98 respectively.

To calculate the pH and pOH of the solution, we need to use the concentration of the acidic solutions and the dissociation constants of HCl and HBr.

First, calculate the pH:

For HCl (aq):

[HCl] = 0.045 M

HCl is a strong acid and dissociates completely in water, so the concentration of H⁺ ions is equal to the concentration of HCl:

[H⁺] = 0.045 M

Taking the negative logarithm (base 10) of the H⁺ concentration gives us the pH:

pH = -log10(0.045)

pH = 1.35

Now, let's calculate the pOH:

For HBr(aq):

[HBr] = 0.095 M

HBr is also a strong acid, and its dissociation is similar to HCl. The concentration of H⁺ ions is equal to the concentration of HBr:

[H⁺] = 0.095 M

Again, taking the negative logarithm (base 10) of the H⁺ concentration gives us the pH:

pH = -log10(0.095)

pH = 1.02

Since pH + pOH = 14 (at 25 °C), we can calculate the pOH:

pOH = 14 - pH

pOH = 14 - 1.02

pOH = 12.98

Therefore, the pH of the solution is approximately 1.35, and the pOH is approximately 12.98.

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Answer:

I think it just goes out into the air and the gas gets thinner (if it's not right sorry, this is just what I think happens)

The prefix "Com-" means "together" or "with," while the prefix "Con-" means "together" or "in association with." The suffix "-stasis" means "contraction," while the suffix "-spasm" means "sudden and involuntary contraction."

The prefix "Com-" means "together" or "with," while the prefix "Con-" means "together" or "in association with." Examples include "compression" (pressing together) and "conjunctiva" (a membrane that joins the eyelid and eye).

The suffix "-stasis" means "contraction," particularly in reference to the movement of muscles in the digestive or urinary tract, while the suffix "-spasm" means "sudden and involuntary contraction." Examples include "peristalsis" (the coordinated contraction of muscles in the digestive tract to move food) and "laryngospasm" (a sudden and involuntary contraction of muscles in the larynx, causing difficulty breathing).

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The abundance of an element in nature, its percent composition in compounds, and its average atomic mass are all interconnected and can be used to draw conclusions about the properties and behavior of elements and compounds.

There are several conclusions that can be drawn between abundance in nature, percent composition, and average atomic mass. First, the abundance of an element in nature is directly related to its percent composition. Elements that are more abundant in nature will have a higher percent composition in a compound. For example, oxygen is the most abundant element in the Earth's crust, making up 46.6% of its mass. Therefore, compounds that are found in the Earth's crust, such as silicates, will have a high percent composition of oxygen.

Secondly, the average atomic mass of an element is also related to its abundance in nature. The average atomic mass of an element is the weighted average of the masses of its isotopes, which takes into account the abundance of each isotope. For example, the element chlorine has two stable isotopes, Cl-35 and Cl-37. The average atomic mass of chlorine is 35.45, which reflects the fact that Cl-35 is more abundant in nature than Cl-37.

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Answer:

False

Explanation:

Phosphorus is number 15 on the periodic table, so its electronic configuration is:

\( {1s}^{2} {2s}^{2} {2p}^{6} {3s}^{2} {3p}^{3} \)

The warm air in Earth’s atmosphere and the warm water in Earth’s oceans sink instead of rise.

The heat energy can be transported by convection by the temperature differential between the two portions of the fluid. Hot fluids tend to ascend due to the temperature differential, but cold fluids prefer to sink. This causes a convection current to form inside the fluid.

Differential heating causes convection currents. Warmer (less dense) stuff rises, whereas cooler (more dense) material sinks. This movement is responsible for the formation of circulation patterns known as convection currents in the Earth’s atmosphere, ocean, and mantle.

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Molar mass of NaCl:-

Now

Activated carbon, also known as charcoal, is commonly used in recrystallization because it is highly porous and has a large surface area that can effectively trap impurities.

This makes it an excellent adsorbent for organic contaminants, residual solvents, and other unwanted substances in the recrystallization solution. The addition of activated carbon to the solution prior to recrystallization helps to purify the desired compound and improve the overall yield of the reaction. Additionally, activated carbon is a highly effective filter that can remove any discoloration, odors, or other impurities that may be present in the solution. By improving the purity of the recrystallization solution, activated carbon can help to ensure that the final product is of a higher quality and has more consistent properties.

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The molecular formula of a compound is a whole number multiple of its empirical formula. The empirical formula of the hydrocarbon is C₄H₉.

The empirical formula of a compound can be defined as the formula which gives the simplest whole number ratio of atoms of various elements present in one molecule of the compound.

Here moles of 'C' = moles 'CO₂' = 6.16 / 44 = 0.14 moles

Moles of 'H' = 2 × moles 'H₂O' = 2 × 2.84/18.02 = 0.315 moles

Divide both number of moles by 0.14. Then we get

1 mol 'C' and 2.25 mol 'H'

Multiply both with 4 to obtain a whole number.

Then the number of carbon is 4 and that of hydrogen is 9.

Thus the empirical formula is C₄H₉.

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Answer:

A) a pure substance

Explanation:

Everything in the universe is made from elements. An element has unique number of protons and electrons. Due to the number of neutrons present in the nucleus, an element can be either stable or radioactive. In other words we can say an element has one type of atoms. C,H,O,N and P can be taken as examples for elements.

Hope this helps! Have a great day!

Answer:

uhh i learned thisin like 6th grade, its A.)

Explanation:

<3 i did not look at the other persons answer i swear U-U

Answer:

(2) never to be so irresponsible again

Explanation: hope this help!

Answer:

never to be so irresponsible again. is it right.