What volume of product is produced when 20.0 Mg of liquid hydrogen reacts with

excess liquid oxygen in a rocket propellant reaction? The gas is formed at 101.325 kPa and 40˚ C

Answer:

\(\boxed {\tt 376.83 \ grams}\)

Explanation:

The density formula is

\(d=\frac{m}{v}\)

Rearrange the formula for mass, m, by multiplying both sides of the equation by v.

\(d*v=\frac{m}{v}*v\)

\(d*v=m\)

The mass can be found by multiplying density and volume.

The density of the sugar is 1.59 grams per milliliter. The volume is 237 milliliters.

\(d= 1.59 \ g/mL \\v= 237 \ mL\)

Substitute the values into the formula.

\(m= 1.59 \ g/mL * 237 \ mL\)

Multiply. Note that the milliliters, or mL will cancel each other out.

\(m=1.59 \ g * 237\)

\(m=376.83 \ g\)

The mass is 376.83 grams.

Answer:

A frog heart has three chambers.two atrium and one ventricle is answer

Explanation:

I hope it's helpful!

Answer: all mass takes up space. everything has mass. Theres a unit of mass called a slug thats not the bug!

Explanation:

The specific heat capacity of glass is 0.84 J/g°C.

To calculate the specific heat capacity of glass, we can use the formula:

q = m × c × ΔT

Where q is the amount of heat transferred, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.

In this experiment, the heat transferred from the glass to the water is equal to the heat gained by the water:

q(glass) = -q(water)

We can rearrange the formula to solve for the specific heat capacity of glass:

c = -q(water) / (m(glass) × ΔT)

Plugging in the values, we get:

c = - (300.0g) × (4.18 J/g°C) × (22.1°C - 20.0°C) / (51.4g × (98.5°C - 22.1°C))

Simplifying the equation gives us:

c = 0.84 J/g°C

The specific heat capacity of glass is 0.84 J/g°C according to this experiment.

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1) Vapor pressure. Water exerts vapor pressure. This pressure is produced by the water molecules that change their state from liquid to gas.

2) Setting a similar system and watching what happens.

If we set a system similar to that shown in the image (place the cup of water in the jar and then close the jar), we will see the following

1) The big jar has no molecules of water gas since we just closed it.

2) Some water molecules change from liquid to gas and start filling the big jar.

3) The big jar will have a certain amount of vapor water.

4) The big jar has so much water that it starts condensing on the walls of the big jar.

5) After enough water is condensed on the walls, it runs down the walls and precipitates.

3) The order observed.

1) Water evaporated from the cup

2) water condensed on the walls of the jar.

3) Water precipitated, or ran down the walls of the jar.

Answer:

A. 7

(assuming the water is neutral)

(a) The pH decreases by approximately 0.38 units. (b) The pH decreases by approximately 1.92 units. (c) The pH remains unchanged. (d) The pH remains unchanged.

To calculate the pH change resulting from the addition of HCl to different solutions, we need to consider the reaction between the added acid (HCl) and the species present in each solution. Let's calculate the pH change for each case:

(a) Pure water:

In pure water, the HCl will dissociate into H⁺ and Cl⁻ ions. Since the volume of water is much larger compared to the volume of HCl added, we can assume that the dilution is negligible. The reaction is as follows:

HCl + H₂O → H₃O⁺ + Cl⁻

Since the initial concentration of H₃O⁺ ions is negligible in pure water, the concentration of H₃O⁺ after the reaction is approximately equal to the concentration of HCl added.

Volume of HCl added = 13 mL = 0.013 L

The concentration of HCl added = 2.4 M

Thus, the concentration of H₃O⁺ after the reaction is approximately 2.4 M.

pH change = -log[H₃O⁺] = -log(2.4) ≈ -0.38

Therefore, the pH decreases by approximately 0.38 units.

(b) 0.10 M \(CH_3COO^-\) (Acetate ion):

In this case, the reaction occurs between HCl and the acetate ion:

\(HCl + CH_3COO^{-} \rightarrow CH_3COOH + Cl^{-}\)

Since the concentration of acetate ion is given, we need to calculate the concentration of HCl remaining after the reaction. The moles of acetate ion can be calculated as follows:

moles of acetate ion = concentration × volume = 0.10 M × 0.6 L = 0.06 moles

The moles of HCl consumed in the reaction are equal to the moles of acetate ion:

moles of HCl consumed = 0.06 moles

The remaining moles of HCl can be calculated by subtracting the moles consumed from the moles initially present:

moles of HCl remaining = moles of HCl initially present - moles of HCl consumed

= concentration × volume - moles of HCl consumed

= 2.4 M × 0.013 L - 0.06 moles

≈ 0.0072 moles

The concentration of HCl remaining can be calculated using the new volume:

The concentration of HCl remaining = moles of HCl remaining / volume

= 0.0072 moles / 0.6 L

≈ 0.012 M

Now, we can calculate the concentration of H₃O⁺ ions after the reaction:

[H₃O⁺] = Concentration of HCl remaining = 0.012 M

pH change = -log[H₃O⁺] = -log(0.012) ≈ -1.92

Therefore, the pH decreases by approximately 1.92 units.

(c) 0.10 M CH3COOH (Acetic acid):

In this case, acetic acid (CH₃COOH) acts as a weak acid, and the reaction occurs between HCl and CH₃COOH:

HCl + CH3COOH ⇌ CH₃COOH₂⁺ + Cl⁻

Since CH₃COOH is a weak acid, we need to consider the equilibrium and calculate the pH change using the Henderson-Hasselbalch equation:

pH change = pKa + log([A⁻] / [HA])

The pKa value for acetic acid (CH₃COOH) is approximately 4.76.

The initial concentrations of CH₃COOH and CH₃COO⁻ (acetate ion) are given as 0.10 M.

Substituting these values into the equation, we get:

pH change = 4.76 + log(0.10 / 0.10)

= 4.76 + log(1)

= 4.76

Therefore, the pH remains unchanged in this case.

(d) 0.10 M \(CH_3COO^-\) and 0.10 M \(CH_3COOH\) (Mixture):

In this case, we have a mixture of acetate ions and acetic acid. The pH change can be calculated using the Henderson-Hasselbalch equation as we did in part (c):

pH change = pKa + log([A⁻] / [HA])

The pKa value for acetic acid (CH₃COOH) is approximately 4.76.

The initial concentrations of CH₃COOH and CH₃COO⁻ (acetate ion) are both 0.10 M.

Substituting these values into the equation, we get:

pH change = 4.76 + log(0.10 / 0.10)

= 4.76 + log(1)

= 4.76

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Answer:you only need one to balance Fe(NO3)2 react with Pb

Explanation:

Answer:

1.238 years will it take

Explanation:

The isotope decay of an atom follows the equation:

Ln[A] = -kt + ln[A]₀

Where [A] could be taken as the amount of the isotope after t years

[A] = 1.00mg

t = ?

k is the decay constant; k = ln2 / Half-life

k = ln 2 / 2.86 years = 0.2424 years⁻¹

[A]₀ is the initial amount of the isotope = 1.35mg

Replacing:

ln1 = -0.2424years⁻¹*t + ln 1.35

0.2424years⁻¹*t = ln 1.35

t =

The final volume of the diluted 0.245 M HCl solution is approximately 208.2 mL.

To determine the final volume of the diluted solution, we can use the equation for dilution:

M1V1 = M2V2

where M1 is the initial concentration, V1 is the initial volume, M2 is the final concentration, and V2 is the final volume.

Substituting the given values, we get:

(4.05 M) (12.5 mL) = (0.245 M) (V2)

Solving for V2, we get:

V2 = (4.05 M) (12.5 mL) / (0.245 M) = 208.2 mL

Therefore, the final volume of the diluted solution is 208.2 mL.

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The balloon's new volume is 24.6L. An arctic weather balloon being inflated using 24.6 litres of helium gas in a prep shed. The shed is seven degrees Celsius inside.

When the balloon is hauled outside, it is seven degrees Celsius outside. Any three-dimensional solid's volume is equal to how much room it occupies. One of these solids can be a cube, a cuboid, a cone, a cylinder, or a sphere. Chemical compounds are composed of a large number of comparable molecules (or molecular entities), which are composed of atoms from various elements bonded together by chemical bonds. Because of this, a molecule composed of atoms from a single element is not a compound.

v1/t1 = v2/t2

24.6/7 = v2/7

v2 = 24.6L

v1 = v2

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The specific measurement that will be affected is the volume of gas collected in the graduated cylinder. Since not all the gas was caught, the volume measured will be less than the actual volume of gas released. This will not change the molar mass calculation.

The molar mass is calculated by using the mass of the gas and the volume of the gas collected. Even though the volume measured was less than the actual volume, the mass of the gas collected should still be accurate. Therefore, the molar mass calculation should not be affected.
Hi! I'm happy to help with your question.

a. The specific measurement that will be affected is the volume of gas collected in the graduated cylinder.

b. This mistake will likely result in a decrease in the calculated molar mass. Since the volume of gas collected is lower than it should be, the molar mass calculation will be based on a smaller amount of gas, leading to a lower value than the actual molar mass.

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Heres a list of questions

1. Define atom.

Atom is the smallest particle of a substance.

2. What are the subatomic particles found in an atom?

The subatomic particles found in an atom are electrons, protons, and neutrons.

3. Define charged particle.

Charged particle is a particle that has an electric charge.

4. Define electric charge.

Electric charge is the physical property of particles such as electrons and protons. Electric charge causes other particles to experience a force.

5. What are the charged particles found in an atom?

Electrons and protons are the charged particles found in an atom.

6. What are the different types of charged particles?

Charged particles are of two types: positive charges and negative charges.

7. What are the negatively charged particles in an atom?

Electrons are the negatively charged particles in an atom.

8. What are the positively charged particles in an atom?

Protons are the positively charged particles in an atom.

9. What is the mass of an electron?

The mass of an electron is 9.107 × 10-31 kilograms.

10. What is the mass of a proton?

The mass of a proton is 1.672 × 10-27kilograms.

11. Define atomic number.

The total number of protons in the nucleus of an atom is called atomic number.

12. Define neutron number.

The total number of neutrons in the nucleus of an atom is called neutron number.

13. Define mass number.

Mass number is the total number of protons and neutrons in the nucleus of an atom.

Mass number can be mathematically written as

Explanation:

Answer:

ima just take all your points and roll out tbh peace

Explanation:

Answer:

what do you mean?

Explanation:

Answer:

2 significant figures i.e. 2 and 7.

Explanation:

We need to find the number of significant figures in the given number i.e. \(2.7\cdot10^{-3}\).

It has 2 significant figures i.e. 2 and 7.

It means the power of 10 doesn't count in the significant figures.

Hence, there are 2 significant figures.

Answer:

260

Explanation:

Last week, Belinda practiced the violin for 45 minutes each day for 6 days.

Now,Multiply 45 minutes of 6 days

45×6=260

Therefore, The amount of time in hours, that Belinda practiced the violin last week.

Answer:

Bohr models show the electrons in atoms are in orbits of differing energy around the nucleus while Dot Diagrams show the bonding in a small molecule only.

Explanation:

It is a non-electrolyte is not an attribute of an acid.

What are Acids?

Acids are characterized as materials that can discharge hydrogen particles when they break up in a water-based solution. An acidic solution is one that contains more hydrogen particles, H+ than hydroxide particles, OH-. Acids have a pH value of less than 7.0.

The strength of the acid is determined by the concentration of hydrogen ions, H+.

When acids are mixed with a base, they react to produce a salt and water. Acidic solutions have a sour taste and can dissolve metals. Acids turn blue litmus paper red. Acids are used in numerous industrial applications, such as the production of fertilizers, plastics, and dyes, as well as the production of fuels from oil and gas.

They are employed in numerous chemical reactions and cleaning operations. They are widely used in the food industry as a preservative and to add flavor. They are also utilized in medicine to make supplements and for the treatment of diseases.

Thus, it is a non-electrolyte is not an attribute of an acid.

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H2SO4 + 2RbOH -> Rb2SO4 + 2H2O

If you want an explanation, keep reading.

In the first portion, there are two hydrogen ions and four sulfate ions.

The second portion has one rubidium ions and one hydroxide ion.

On the other side of the equation, in order to keep those two rubidiums balanced, you'll need to add a two at the beginning of the second portion, but in that process you are giving a second hydroxide value.

Back to the right side, there is there is water (H2O).

On the first portion, there were two hydrogen ions. The second portion also has two hydroxides because of the value change (adding the two to the front).

So on the fourth portion, you'd have to add another two so you could balance the four hydrogen ions (H2 and 2OH) and the two oxygen ions (2OH).

I hope this was easy to understand.

Answer:

It is considered an ionic compound since it is composed of the magnesium cation (Mg2+) and two hydroxide anions (OH-). There are no covalently shared electrons here. ... The reaction of the hydroxide anions with acid causes more of the magnesium hydroxide to dissolve until all of the acid has been neutralized.

a) The Lennard-Jones potential predicts the separation r_eq at the minimum energy U_min.

b) The U_min for this interaction at T=298 K is the value obtained from the Lennard-Jones potential equation when r=r_eq.

c) The ratio of U_min to the purely attractive van der Waals component of the interaction potential at r_eq can be calculated by comparing the attractive part (-A/r^6) to the total potential energy U_min.

d) The ratio of r_eq to r_0, where u(r_0)=0.4, can be determined by finding the value of r_eq where the potential energy is equal to 0.4 times the total potential energy at r=r_0.

e) The ratio of r_s to r_0, where r_s is the separation where the magnitude of the attractive adhesion force is maximum, can be determined by finding the value of r where the derivative of the potential energy with respect to r is equal to zero.

f) The value of F_max between the two atoms can be obtained by taking the negative derivative of the potential energy equation with respect to r and evaluating it at r=r_s.

a) The Lennard-Jones potential provides information about the relationship between energy and separation between two interacting atoms.

At the minimum energy (U_min), the potential predicts the separation r_eq, which corresponds to the equilibrium distance between the atoms. This is the distance at which the energy of the system is at its lowest point.

b) To determine the value of U_min at a given temperature (T=298 K), you can substitute the equilibrium separation r_eq into the Lennard-Jones potential equation and calculate the resulting energy value.

This will give you the U_min for the interaction.

c) The Lennard-Jones potential consists of two components: an attractive component (-A/r^6) and a repulsive component (B/r^12).

The ratio of U_min to the purely attractive van der Waals component of the interaction potential at r_eq can be calculated by comparing the magnitude of the attractive component to the total potential energy at the equilibrium separation.

This ratio provides insights into the relative contribution of the attractive force to the overall potential energy at equilibrium.

d) The ratio of r_eq to r_0 can be determined by finding the value of r_eq where the potential energy is equal to 0.4 times the total potential energy at r=r_0.

In other words, you need to solve the Lennard-Jones potential equation for r_eq when the potential energy is equal to 0.4 times the potential energy at r=r_0.

e) The ratio of r_s to r_0 is obtained by finding the value of r where the magnitude of the attractive adhesion force is maximum.

This can be determined by finding the separation r where the derivative of the potential energy equation with respect to r is equal to zero.

The value of r_s represents the separation at which the attractive force between the atoms is strongest.

f) The value of F_max between the two atoms can be obtained by taking the negative derivative of the Lennard-Jones potential energy equation with respect to r and evaluating it at r=r_s.

This will give you the magnitude of the maximum attractive adhesion force between the atoms.

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Answer:

I'm terribly sorry but the download is not working for me! All it says is Download pdf, and when I click it, It does nothing except for refreshing the page!

Explanation:

Answer:

.43 atm

Explanation:

11.2 x .860 = ans./22.4

We can check this by knowing that P and V at constant T have an inverse relationship. Therefore, this answer is correct.

- Hope that helps! Please let me know if you need further explanation.

Answer:

The movement is random

Explanation:

Answer:

Explanation:

By observing chemical reactions, we are able to understand and explain how the natural world works. Chemical reactions turn food into fuel for your body, make fireworks explode, cause food to change when it is cooked, make soap remove grime, and much more.

Organic compound which has -OH as functional group is classified as alcohols while those with -COOH as functional group are classified as carboxylic acids.

Functional group is defined as a substituent or group of atoms or an atom which causes chemical reactions.Each functional group will react similarly regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.

The reactivity of functional group can be enhanced by making modifications in the functional group .Atoms present in functional groups are linked to each other by means of covalent bonds.They are named along with organic compounds according to IUPAC nomenclature.

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The percent composition depicts the percent of an individual element by mass. The percent composition by mass is determined by the ratio of individual mass to the molar mass of the whole compound.

Mass percent composition is defined as the ratio of the mass of an element in a mole to the molar mass of a compound and multiplied by 100. This allows knowing the mass of an element in a compound or a molecule to the rest of the compound.

First, the molar mass of the whole compound is calculated by adding the individual masses and then used in an equation to get divided by the individual mass of the involved element.

The mass percent composition is given as,

% by mass = mass of element / molar mass of compound × 100%

Therefore, the mass percent composition involves the mass of the individual elements and molar mass.

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The integumentary system functions to retain body fluids, protect against disease, eliminate waste products, and regulate body temperature. Cell membrane performs the same function as the integumentary system. Therefore, option A is correct.

The cell membrane performs a function that is similar to the integumentary system. The cell membrane is a thin, flexible layer that surrounds the cell and acts as a barrier between the cell and its external environment.

It helps to regulate the movement of substances in and out of the cell, maintain the balance of fluids and electrolytes, and protect the cell from harmful substances.

The cell membrane can also play a role in temperature regulation, as it helps to maintain the proper internal environment of the cell.

Thus, option A is correct.

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Answer:

The answer is offspring

Explanation: