At a certain temperature this reaction follows first-order kinetics with a rate constant of 0.0197s. 2N2O5 (g) right arrow 2N2O4 (g) + O2 (g)Suppose a vessel contains N2O5 at a concentration of 0.280 M. Calculate how long it takes for the concentration of N2Os to decrease by 0.0476 M. You may assume no other reaction is important.

Answer:

The mass of sucrose in grams required to make  7% weight volume in 100 mL solution of water is 7g

Explanation:

The percentage weight of a solution is mostly referred to as percentage weight per volume (% w/v). The formula for this is

% w/v = g of solute/100 mL of solvent

sucrose is the solute here while water is the solvent. The mass (in grams) of the solute is the unknown

7% = g of solute/100 mL of water

where 7% equals/the same with 7/100;

7/100 = g of solute/100 mL of water

g of solute = 7 × 100/100

g of solute = 7 g

The mass of sucrose in grams required to make  7% weight volume in 100 mL solution of water is 7g

During the chemiosmosis , ATP is synthesized when H⁺ ions move through a channel in ATP synthase.

The chemiosmosis is the movement of the ions through the semipermeable membrane . The ATP synthesis the free energy which is obtained by the electrons that are passes through the several carriers.  chemiosmosis is the process of the pumping of the protons through the semipermeable membrane to obtained the proton gradient. the energy will be released in the process and results in the ATP synthesis.

Thus, when the  H⁺ ions will move through the channel in the ATP synthase , ATP is synthesized , in the process of the chemiosmosis.

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Answer:

56.96 grams

Explanation:

To find the mass of 1.78 moles of O2, we need to use the molar mass of O2, which is the mass of one mole of O2.

The chemical formula for O2 is O-O or simply O2. The molar mass of O2 is the sum of the atomic masses of two oxygen atoms, which can be found on the periodic table.

The atomic mass of oxygen (O) is approximately 16.00 g/mol. So the molar mass of O2 is:

Molar mass of O2 = 2 x atomic mass of O

= 2 x 16.00 g/mol

= 32.00 g/mol

Therefore, the mass of 1.78 moles of O2 is:

Mass = number of moles × molar mass

= 1.78 mol × 32.00 g/mol

= 56.96 g

So the mass of 1.78 moles of O2 is 56.96 grams.

Answer:

east

Explanation:

There is no reason to run these solutes at the 20 MWCO because they are both much smaller than the MWCO of the membrane.

The MWCO (molecular weight cut off) is the molecular weight of a solute at which it will be retained by a membrane during a process such as ultrafiltration or dialysis. If a solute has a molecular weight higher than the MWCO of a membrane, it will be retained and not pass through the membrane. If the molecular weight of a solute is lower than the MWCO, it will pass through the membrane.

In this case, glucose has a molecular weight of 180 g/mol (6 carbons x 12 g/mol per carbon + 6 oxygens x 16 g/mol per oxygen) and albumin has a molecular weight of approximately 81,942 g/mol (607 amino acids x 135 g/mol per amino acid). Both of these solutes have molecular weights that are much lower than 20,000 g/mol, which is a typical MWCO for ultrafiltration or dialysis membranes.

They would both easily pass through the membrane and be lost during the process. Instead, a membrane with a much lower MWCO would be needed if we wanted to retain these solutes during a process such as ultrafiltration or dialysis.

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Answer:

The waves travel in a direction parallel to direction of the vibration of the medium

The waves travel in a direction parallel to direction of the vibration of the medium

A mechanical wave is defined as an oscillation of matter which is responsible for energy transfer via  medium.

The propagation of  wave is limited by the medium of transmission, the oscillating material which revolve around a fixed point with little translational motion.

A surface wave which is an example of  mechanical wave that propagate  along the interface of two different media in physics. other common examples are Gravity waves on the surface of liquids, ocean waves.

Surface wave can be propagated in a slow way through Earth material and are generally lower in frequency than body waves.

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Answer:

B.

Explanation:

The electronic configuration of the chlorine atom can be written as 2, 8 , 7

The positioning of electrons within an atom's or molecule's orbitals is referred to as its electronic configuration. Around the atomic nucleus of an atom, electrons—negatively charged subatomic particles—occupy various energy levels or shells.

The electrons in an atom fill these energy levels or shells in a certain order in accordance with a series of laws known as the Aufbau principle, Pauli exclusion principle, and Hund's rule. Each energy level or shell has a maximum capacity for electrons.

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In exactly 1 mol Hg₂(NO₃)₂ , there are 2 mol Hg, 2 mol N and 6 mol O.

Since the molecular formula of Hg₂(NO₃)₂ shows that for every mole of the substance, we have 2 moles of Hg, 2 moles of N and 6 moles of O.

So, in exactly 1 mol Hg₂(NO₃)₂ , there are 2 mol Hg, 2 mol N and 6 mol O.

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Explanation:

We are given: density of Ba = 3.5g/mL

: dimensions of Ba = 1cm, 3cm , 5cm

Therefore, volume of Ba = 1*3*5 = 15cm^3 = 15ml

Answer:

Mass of Ba is 52.5g.

The balanced chemical equation is 3O₂ (g) --> 2 O₃ (g).

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The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

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Answer:

Explanation:

Determine the treatments you’ll be using on your eggs, and prepare the substances you’ll need. You can make salt-water solutions by dissolving different amounts of table salt in containers of water (e.g. 100g, 200g, 300g of salt (NaCl) per liter). You can make solutions of food coloring by adding a few drops of each color into containers of  

The Eggsperiment with Vinegar solution. The first experiment conducted was the egg placed in vinegar solution which allowed the egg to become soft and bouncy . Vinegar is a weak acid which is 5% acetic acid in water (meaning vinegar is largely just water). The egg has a shell that is made up of calcium carbonate   an air cell forms at the large end of the egg. While the embryo is growing, the shell membranes surround and contain the white or albumen of the egg. The albumen provides the liquid medium in which the embryo develops, and it also contains a large amount of the protein necessary for proper development. I hope this was hopeful

Answer:

A

Explanation:

I sad A because water is changeable doesn't have fixed shape or volume water depend on the area or the temperature or other things .

If the route length is constant, the intercept of the calibration curve should be zero, and the slope should be proportional to the molar absorptivity times the path length.

Beer's law, which links absorbance to concentration, is represented by a linear function. The molar attenuation coefficient multiplied by the cuvette width, or pathlength—1 centimetre in this lab—gives you the slope of your calibration curve. To find the concentration, rearrange the linear solution.

According to Beer's Law, a solution's absorbance (A) is inversely proportionate to its concentration.

A = εcl

The molar absorptivity () times the route length (l) are represented by the calibration curve's slope (m):

m = εl

If the route length is constant, the calibration curve's intercept (b) should be zero because there shouldn't be any absorbance at zero concentration:

b = 0

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Answer:

Can I get BRAINLIEST.... Please

Answer:

Below :))

Explanation:

I would suggest having a space/rocket theme, which fits your project.

What you do really depends on how much you want to put into it.

If its a black board, you could draw/make rockets to put on the board, and some planets. You could also make/draw some baking soda and vinegar bottles/cans. From what I have done, I have pictures/writing to put on the board. I suggest priting these if you have them, and putting them around the board. You should probably put theses on first, and then draw/make things to put on the board afterward.

Hope this gives you some ideas, if not though, comment down below and I can help more!

Answer:

C. 0.0300mol of Na+ are in 100mL of 0.1M Na3PO4

Answer:

8.5

Explanation:

Took the test and got it correct

On an average, teenagers require 8.5 hours of sleep each night to maintain good health.

A teenager, or teen, is someone who is between 13 and 19 years of age. They are called teenagers because the number of their age contains the suffix "teen". The word "teenager" is often associated with adolescence. Most neurologists consider the brain still developing into a person's early or mid-20s. A person becomes a teenager when they become 13 years old. It ends when they turn 20 years old. Teenagers who are between 13 and 17 years old are considered both children and teenagers in most countries. Teenagers who are 18 and 19 years old may be regarded as both teenagers and adults.

The way the word is used varies. Most societies have rites of passage to mark the change from childhood to adulthood. These ceremonies may be quite elaborate.During puberty, rapid mental and physical development occurs. Adolescence is the name for this transition period from childhood to adulthood.

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Answer:  1.53 M

Explanation:

1) solve for moles

345 g CaCO3 x ( 1mol/100.09 g) =3.446897792 moles

2) plug in formula M=mole/liters

3.446897792 / 2.25 = 1.53 M

9.77 litres of NO2 are generated on average.

The balanced equation for the breakdown of N2O5 is as follows:

\(2N_2O_5(g) -- > 4NO_2(g) + O_2(g)\)

determine how many moles of N2O5 decompose:

\(V(N_2O_5) / Vm = n(N_2O_5)(N_2O_5)\)

where V(N2O5) = 4.86 dm3 is N2O5's volume and Vm(N2O5) is N2O5's molar volume under the circumstances stated in the ideal gas law:

\((R*T)/P = Vm = V/n\)

when the gas constant R is used.

the kelvin scale of temperature, T

The pressure is P.

The ideal gas law:

\(n(N_2O_5) = V(N2O5) / Vm(N_2O_5) = 4.86 dm3 / (24.46 L/mol) = 0.1982 mol\)

the number of moles of NO2 is:

\(n(NO_2 = 4/2 * n(N_2O_5) = 0.3964 mol\)

then,

\(n(NO_2 = 4/2 * n(N_2O_5) = 0.3964 mol\)

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Answer:

A) Using the ideal gas law, we can calculate the number of moles of gas present:

```

PV = nRT

```

where:

* P = pressure (atm) = 1 atm

* V = volume (L) = 5.6 L

* n = number of moles of gas

* R = ideal gas constant = 0.08206 L atm / mol K

* T = temperature (K) = 273.15 K

Solving for n, we get:

```

n = (P * V) / RT

```

```

n = (1 atm * 5.6 L) / (0.08206 L atm / mol K * 273.15 K)

```

```

n = 0.25 mol

```

Therefore, there are 0.25 moles of gas present.

B) The molar mass of the gas can be calculated by dividing the mass of the gas (8.0 g) by the number of moles of gas (0.25 mol):

```

Molar mass = Mass / n

```

```

Molar mass = 8.0 g / 0.25 mol

```

```

Molar mass = 32 g/mol

```

The molar mass of the gas is 32 g/mol.

C) The common atmospheric gas with a molar mass of 32 g/mol is oxygen (O2). Therefore, the gas that was collected is oxygen.

Explanation:

Answer:

1) increase concentration

2) decrease the amount

3) decrease the concentration

4) it would increase

Explanation: edge 2021

Answer:

1) increase concentration

2) decrease the amount

3) decrease the concentration

4) it would increase

Explanation:

Answer:

A, B and D

Explanation:

Gas particles move randmly at high speed, colliding with each other

Answer:

Eukarya

Explanation:

It's larger than a prokaryotic cell and it has a nucleus.

When 1 J of heat is supplied to 1 gramme of a substance, the temperature will rise by more than 1°C. These substances are B) H2O(l), with a specific heat capacity of 4.18 J/gK, and D) Al(s), with a specific heat capacity of 0.900 J/gK.

A substance's specific heat capacity is the amount of energy needed to increase 1 gramme of that substance's temperature by 1°C. A material may absorb more heat without significantly changing its temperature if its specific heat capacity is larger. Given that H2O(l) has a specific heat capacity more than 1 J/g°C, it would require more energy to raise its temperature by 1°C, and it would suffer a temperature increase of more than 1°C when 1 J of heat were applied to 1 gramme of the substance. Al(s) would also suffer a temperature increase of more than 1°C when 1 J of heat is applied to 1 gramme of the material since it has a larger specific heat capacity than 1 J/g°C.

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When 1 J of heat is applied to 1 g of a substance, the temperature rises by more than 1 °C. These materials are:

B) H2O(l) with a specific heat capacity of 4.18 J/gK and

D) Al(t) with a specific heat capacity of 0.900 J/gK.

The specific heat of a substance is the amount of energy required to raise the temperature of 1 g of that substance by 1°C. If a material has a high specific heat capacity, it can absorb more heat without significantly changing its temperature. If the specific heat capacity of H2O (l) is greater than 1 J/g°C, more energy is required to raise the temperature by 1 °C, and the temperature rises by more than 1 °C at 1 J. Heat was applied to 1 g of the substance. Al(s) also has a specific heat capacity higher than 1J/g°C, so applying 1J of heat to 1g of material causes a temperature rise of more than 1°C.

Heat capacity or heat capacity is a physical property of a substance defined as the amount of heat that must be transferred to an object to obtain a unit change in temperature. The SI unit for heat capacity is the joule per kelvin (J/K).

Heat capacity is a broad property. That concentrated property is the specific heat capacity, which is the heat capacity of an object divided by its mass. Divide the heat capacity by the amount of substance in moles to get the molar heat capacity. Volumetric heat capacity measures the heat capacity per unit volume. In architecture and civil engineering, the heat capacity of a building is often referred to as its thermal mass.

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It would take 22g of sodium hydroxide (NaOH) to make 16g of the antacid milk of magnesia (magnesium hydroxide).

In the field of chemistry known as stoichiometry, desired quantitative data is ascertained by using relationships between the reactants and/or products of a chemical reaction. Stoichiometry literally translates as the measure of elements because the Greek words stoikhein and metron both mean element and measure, respectively.

In a chemical reaction, the total mass of reactant and product are equal, according to the statement, and neither is generated nor destroyed. This is the stoichiometric law, and also the law of conservation of mass.

\(16 \mathrm{~g} \text { of } \mathrm{Mg}(\mathrm{OH})_2 \times \frac{1 \mathrm{molMg}(\mathrm{OH})_2}{58.3 g \mathrm{gg}(\mathrm{OH})_2} \times \frac{2 \mathrm{~mol} \mathrm{NaOH}}{1 \mathrm{molMg}(\mathrm{OH})_2} \times \frac{40 \mathrm{gNaOH}}{\mathrm{molNaOH}}=22 \mathrm{~g}\)

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Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.