How many moles of H2SO4 do you have if there are 1.64x10^22 molecules of H2SO4

Final answer:

To find the final molarity of the solution, use the formula M1V1 = M2V2. Plugging in the values, we can solve for M2, which is the final molarity. In this case, the final molarity is 0.160 M.

Explanation:

To find the final molarity of the solution, we need to use the formula:

M1V1 = M2V2

Where M1 is the initial molarity, V1 is the initial volume, M2 is the final molarity, and V2 is the final volume.

In this case, M1 is 0.800 M, V1 is 100. mL, M2 is unknown, and V2 is 500. mL. Plugging in these values, we can solve for M2:

(0.800 M)(100. mL) = M2(500. mL)

Dividing both sides by 500. mL gives:

M2 = (0.800 M)(100. mL) / 500. mL = 0.160 M

Therefore, the final molarity of the solution is 0.160 M.

Answer:

0.211 mol CaCI2

Explanation:

on edge

The molar mass of nitrogen gas  N₂ is 28 g/mol. Thus, the number of moles present in 23.4 g is 0.83 moles.

Nitrogen is 7the element in periodic table. It exists in diatomic state or molecular state as  N₂ gas. Two nitrogen atoms are covalently bonded together through sharing of three electrons each.

One mole of any element contains  6.022 × 10²³ atoms. This number is called Avogadro number. The mass of one mole of a substance is called its molar mass.

The atomic mass of N is 14 g/mol. Thus, for  N₂ the mass is 28 g/mol. Hence, one mole of nitrogen gas weighs 28 g. The number of moles in 23.4 g of  N₂ is calculated as follows:

Number of moles = weight / molar mass

                             = 23.4 g/28 g/mol

                             = 0.83 moles.

Therefore, the number of moles of  N₂ in 23.4 g is 0.83.

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Your question is incomplete. But your complete question probably was:

How many moles are in 23.4 g of N₂.

The molarity of the HCl is 1 M when 12.0 of .500 M NaOH neutralized 6.0 ml of HCl solution.

Explanation:

Data given:

molarity of the base NaOH, Mbase =0. 5 M

volume of the base NaOH, Vbase = 12 ml

volume of the acid, Vacid = 6 ml

molarity of the acid, Macid = ?

The titration formula for acid and base is given as:

Mbase Vbase = Macid Vacid

Macid =[tex]\frac{0. 5 X 12}{6}[/tex]

Macid = 1 M

we can see that 1 M solution of HCl was used to neutralize the basic solution of NaOH. The volume of NaOH is 12 ml and volume of HCl used is 6ml.

After 7 half-lives, 0.78% of a substance remains. This is calculated by taking 0.5 to the power of 7, as each half-life represents a 50% reduction of the remaining substance from the previous amount.

To determine what percentage of a substance remains after 7 half-lives, you can calculate the remaining quantity using the principle that after each half-life, only 50% of the substance remains from the previous amount. So after 1 half-life, 50% remains; after 2 half-lives, 25% remains (which is 50% of 50%); and this process continues.

To find the remaining percentage after 7 half-lives, you would calculate (0.5)^7. That means you take 0.5 (half of the substance) and multiply it by itself 7 times. The calculation will look like this: 0.5 x 0.5 x 0.5 x 0.5 x 0.5 x 0.5 x 0.5 = 0.0078125, which is 0.78125%. You can round this to 0.78%, which is the closest answer to the options given and would be the correct choice.

Answer:

When you stir a spoonful of sugar into a glass of water, you are forming a solution. This type of liquid solution is composed of a solid solute, which is the sugar, and a liquid solvent, which is the water. As the sugar molecules spread evenly throughout the water, the sugar dissolves.

Answer:

a bird sitting on a branch

Answer:

Explanation:

Boyle believed that chemistry – the behavior of substances – could be explained through the motion of atoms, which in turn could be understood through mechanics – Galileo's mathematics of motion. Boyle was ultimately proved correct, because today we can understand chemistry mathematically, through quantum mechanics.

Answer:

Find another food source

Explanation:

They should Find another tree or food soure

5. 1.16 x [tex]10^{26}[/tex] moles  moles of pennies would be required to equal the mass of the moon.

6. 12.86 moles of ethanol are in a 750 ml bottle of vodka.

Explanation:

5 .Data given:

mass of penny = 2.5 grams

atomic mass of penny = 62.93 grams/mole

moles present in mass of the moon given as = 7.3 x [tex]10^{24}[/tex] kg

number of moles = [tex]\frac{mass}{atomic mass of 1 mole}[/tex]

number of moles = [tex]\frac{2.5}{62.93}[/tex]

0.039 moles of penny is present in 2.5 grams

0.039 moles of penny in 2.5 grams of it

so, x moles in 7.3 X [tex]10^{27}[/tex]  grams

[tex]\frac{0.039}{2.5} =\frac{x}{7.3 X 10^{27} }[/tex]

x = 1.16 x [tex]10^{26}[/tex] moles

so when the mass of the penny given is equal to the mass of moon, number of moles of penny present is 1.1 x [tex]10^{26}[/tex] .

6.

Given:

vodka = 40% ethanol

volume of vodka bottle = 750 ml

moles of ethanol =?

density of ethanol =0.79 g/ml

atomic mass of ethanol = 46.07 grams/mole

so, from the density of ethanol given we can calculate how much ethanol is present in the solution.

density = [tex]\frac{mass}{volume}[/tex]

density x volume = mass

0.79 x 750 = 592.5 grams

number of moles = [tex]\frac{mass}{atomic mass of 1 mole}[/tex]

number of moles of ethanol = [tex]\frac{592.5}{46.07}[/tex]

                                               = 12.86 moles of ethanol

Answer:I think it is C not positive though

Explanation:

In one of your trials you placed 5.5 grams of salt in 10 ml of water. (a) The w/w % is 35.48% (b) The w/v % is 55 % (c) The moles of NH₄Cl is 0.1  mol (d) The molarity of solution is 10 M.

Concentration % (w/w) = [tex]\frac{\text{Weight of solute}}{\text{Weight of solution}} \times 100[/tex]

Weight of solution = Solute + Solvent

                              = 5.5 g + 10g    [ 1 ml water = 1 g water]

                              = 15.5

Concentration % (w/w) = [tex]\frac{\text{Weight of solute}}{\text{Weight of solution}} \times 100[/tex]

                                     = [tex]\frac{5.5}{15.5} \times 100[/tex]

                                     = 0.3548 × 100

                                     = 35.48 %

Concentration %(w/v) = [tex]\frac{\text{Mass of solute (in g)}}{\text{Volume of solution (in ml)}} \times 100[/tex]

                                    = [tex]\frac{5.5}{10} \times 100[/tex]

                                    = 55%

To calculate the number of moles of a substance we have to divide the given mass/weight of the substance by the molar mass of the substance.

Moles = [tex]\frac{\text{Given Mass}}{\text{Molar mass }}[/tex]

          = [tex]\frac{5.5}{53.5}[/tex]

          = 0.1 mol

Molarity (M) is defined as the number of solute dissolved in per liter of solution.

Molarity (M) = [tex]\frac{\text{Number of moles of solute}}{\text{Volume of solution (in liters)}}[/tex]

Convert ml into l

1 ml = 0.001 liter

10 ml = 10 × 0.001

         = 0.01 liter

Now put the value in above formula we get

Molarity (M) = [tex]\frac{\text{Number of moles of solute}}{\text{Volume of solution (in liters)}}[/tex]

                    = [tex]\frac{0.1}{0.01}[/tex]

                    = 10 M

Thus from the above conclusion we can say that In one of your trials you placed 5.5 grams of salt in 10 ml of water. (a) The w/w % is 35.48% (b) The w/v % is 55 % (c) The moles of NH₄Cl is 0.1  mol (d) The molarity of solution is 10 M.

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Answer:

The first one

Explanation:

Hope this helps :)

Answer:

vegetables and insects

Explanation: bearded dragon are most likely to thrive off of vegetables and insects due to the nutrients of both.

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100.4 degree celsius is the temperature of the water having non-electrolyte.

The correct answer is b.

Explanation:

Data given:

mass of non-electrolyte solute = 31.65 grams

volume of water = 220 ml or 0.22 litres

molar mass of solute = 180.18 grams/mole

density of water = 1 gm/mole

Boiling point of water = 100 degrees celsius

molality = ?

Kb for water = 0.51

boiling point elevation or temperature of hot water,T =?

Formula used:

T = mKb   equation 1

number of moles of non electrolyte = [tex]\frac{31.65}{180.18}[/tex]

number of moles = 0.17 moles

molality = [tex]\frac{0.17}{0.22}[/tex]

molality = 0.77 M

putting the values in equation 1

T = 0.77 X 0.51

T  = 0.392 degree celsius. is the elevation in temperature when solute is added.

Temperature of the hot water = 100 +0.392

                                                    = 100.392 degree celsius.

Answer:

A physical system

Explanation:

It doesn't allow certain types of transfers, though the transfer of energy is permitted.

Answer : The number of moles of argon gas is, 11.5 mol

Explanation :

To calculate the moles of argon we are using ideal gas equation as:

[tex]PV=nRT[/tex]

where,

P = pressure of argon gas = 658 mmHg = 0.866 atm    (1 atm = 760 mmHg)

V = volume of argon gas = 30.6 L

n = number of moles of argon gas = ?

R = gas constant = 0.0821 L.atm/mol.K

T = temperature of argon gas = 28 K

Now put all the given values in the above formula, we get:

[tex](0.866atm)\times (30.6L)=n\times (0.0821 L.atm/mol.K)\times (28K)[/tex]

[tex]n=11.5mol[/tex]

Therefore, the number of moles of argon gas is, 11.5 mol

Answer:

density of a fluid

Explanation:

Answer:

the answer is photosynthesis

Answer:

Plants make food by a process known as photosynthesis. As the name suggests, photo or light energy is used in this process of synthesis. Plants use three ingredients: sun light, carbon dioxide (CO2) and water (H2O) to make food (sugars). The following takes place during photosynthesis:

6CO_2 + 6H_2O + (light) -> C_6H_(12)O_6 + 6)_2

Answer:

B

Explanation:

ALL CELLS USE CELLULAR RESPIRATION

0.17 M is the is the molal concentration of this solution

Explanation:

Data given:

freezing point of glucose solution = -0.325 degree celsius

molal concentration of the solution =?

solution is of glucose=?

atomic mass of glucose = 180.01 grams/mole

freezing point of glucose = 146 degrees

freezing point of water = 0 degrees

Kf of glucose = 1.86 °C

ΔT = (freezing point of solvent) - (freezing point of solution)

ΔT = 0.325 degree celsius

molality =?

ΔT = Kfm

rearranging the equation:

m = [tex]\frac{0.325}{1.86}[/tex]

m= 0.17 M

molal concentration of the glucose solution is 0.17 M

The molal concentration of an aqueous glucose solution with a freezing point of -0.325°C is 0.175 mol/kg, calculated using the freezing point depression formula.

To find the molal concentration of the aqueous solution of glucose, we can use the formula for the freezing point depression ΔTf = i * Kf * m, where ΔTf is the change in freezing point, i is the van 't Hoff factor (which is 1 for a non-electrolyte like glucose), Kf is the freezing point depression constant for water (1.86°C/m), and m is the molality of the solution. Given that the freezing point of the solution is -0.325°C and the freezing point of pure water is 0.0°C, ΔTf = 0.0°C - (-0.325°C) = 0.325°C. Now, we can solve for molality (m).

ΔTf = (1) * (1.86°C/m) * m => 0.325°C = 1.86°C/m * m

Therefore, m = 0.325 °C / 1.86 °C/m = 0.175 mol/kg, which is the molal concentration of the glucose solution.

Answer:

a) The rocks have more mass, and therefore contain more matter, than the

feathers.

Explanation:

Final answer:

The correct answer is that rocks have a greater mass and contain more matter than an equal volume of feathers, making them feel heavier. This illustrates the concept of mass versus density in physics.

Explanation:

The question involves comparing the mass and density of two different materials and understanding their properties in terms of physics. When you hold the same volume of rocks and feathers, the rocks feel heavier because they have a greater mass and density than the feathers. This is similar to the old riddle about whether a ton of feathers or a ton of bricks weighs more, which serves to illustrate that while the mass — a measure of how much matter is in an object — is the same for both (a ton is a ton), the density of the bricks is much higher. Density is the mass per unit volume, and since bricks are denser than feathers, a given volume of bricks will weigh more than the same volume of feathers.

Answering the student's question directly, option a) The rocks have more mass, and therefore contain more matter, than the feathers. is the correct choice. The rocks, having more mass, will have more matter in the same volume when compared to feathers, which is why rocks feel heavier.

Answer:

0.1%

Explanation:

It’s glucose and oxygenAnswer:

Explanation:

Answer:

Y - glucose Z - oxygen

Explanation:

Answer:

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.

hope this helps!!!!!!

When a substance gets hotter, its particles move faster and spread out, causing it to expand. When it cools down, its particles slow down and come closer together, which causes it to contract. When a substance changes state, the arrangement and movement of its particles also change in a significant way.

The particles of matter are always moving. When a substance becomes hotter, its particles move faster and generally spread out, resulting in an increase in volume. This is often referred to as thermal expansion.

When a substance cools down, its particles move slower and come closer together, which usually means a decrease in volume. This is called contraction.

When a substance changes state, the arrangement and movement of particles change significantly. For example, when water (a liquid) freezes into ice (a solid), its particles slow down and take on a fixed, orderly pattern. When ice melts back into the water, its particles speed up and move past each other more freely. When water boils into steam (a gas), its particles move even faster and are much further apart.

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Final answer:

Carbon dioxide subliming is a physical change, which is a phase transition from solid to gas without altering the substance's molecular structure.

Explanation:

Carbon dioxide subliming is an example of a physical change. Sublimation is the process where a substance changes from a solid to a gas without going through the liquid phase. In this case, solid carbon dioxide (also known as dry ice) directly becomes carbon dioxide gas. During sublimation, there is an energy change associated with the phase change, but the molecular structure of the substance does not change. Therefore, sublimation is categorized as a physical change rather than a chemical change or any other type of change like mass or nuclear.

Carbon dioxide subliming, which is the direct phase change from solid to gas, is an example of a physical change. Sublimation occurs when a compound's vapor pressure equals its applied pressure, and most solids do not easily sublime unless they have weak intermolecular forces.

Number of moles = 5.7 moles of oxygen.

Explanation:

We have to convert number of molecules into number of moles by dividing the number of molecules by Avogadro's number.

Here number of molecules of oxygen given is 34.1 × 10²³ molecules.

Now we have to divide the number of molecules by Avogadro's number as,

Number of moles = [tex]$\frac{number of molecules}{Avogadro's number}[/tex]

                            = [tex]$\frac{34.1}{6.022} \times \frac{10^{23} }{10^{23} }[/tex]

                          = 5.7 moles

So here molecules is converted into moles.

Answer:

A

Explanation:

Answer : The temperature of neon gas will be, 221.0 K

Explanation :

To calculate the temperature of neon gas we are using ideal gas equation.

[tex]PV=nRT\\\\PV=\frac{w}{M}RT[/tex]

where,

P = pressure of neon gas = 96.7 kPa = 0.955 atm

Conversion used : (1 atm = 101.3 kPa)

V = volume of neon gas = 9.50 L

T = temperature of neon gas = ?

R = gas constant = 0.0821 L.atm/mole.K

w = mass of neon gas = 10.00 g

M = molar mass of neon gas = 20 g/mole

Now put all the given values in the ideal gas equation, we get:

[tex](0.955atm)\times (9.50L)=\frac{10.00g}{20g/mole}\times (0.0821L.atm/mole.K)\times T[/tex]

[tex]T=221.0K[/tex]

Therefore, the temperature of neon gas will be, 221.0 K

To find the temperature at which a 10.00 g sample of neon gas will exert a pressure of 96.7 kPa in a 9.50 L container, we can use the ideal gas law. After all the calculations, the temperature comes out to be approximately -52 °C.

The temperature at which a 10.00 g sample of neon gas will exert a pressure of 96.7 kPa in a 9.50 L container can be calculated using the ideal gas law, which is PV = nRT. Here, P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

First, let's convert the weight of Neon into moles by using the molar mass of Neon (20.18 g/mol). So, n = 10.00 g / 20.18 g/mol = 0.495 moles. The R value that corresponds to the units of pressure (kPa) and volume (L) we're using is 8.3145 L.kPa/K.mol. Now, we can solve the equation for the temperature: T = PV/nR = (96.7 kPa * 9.50 L) / (0.495 mol * 8.3145 L.kPa/K.mol) = 221.5 K.

Since the question asks for the temperature in °C, we need to convert Kelvin to Celsius by subtracting 273.15: T = 221.5 K - 273.15 = -51.65 °C. Therefore, a 10.00 g sample of neon gas will exert a pressure of 96.7 kPa in a 9.50 L container at approximately -52 °C.

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