A quantity of gas is at a temperature of 20°C, a pressure of 760 torr and occupies a volume of 2. 00 L. If the pressure is changed to 730 torr, what will be the new volume? Assume that there is no temperature change

The first one appear to be a pan with some liquid heating up.

The beginning state is liquid, the phase change type is a vaporization and its ending state is gas.

The second one seems to be a ice cube melting.

Its beginning phase is solid, the phase change type is fusion, and its ending state is liquid.

The third one is water, or other liquid, making clouds.

The beginning state is liquid, the phase change type is a vaporization and its ending state is gas.

The fourth illustration seems to be an aluminium can. There aren't really a phase change happening, but when we open the aluminium can containing gaseous drink, there are molecules of gas diluted into the liquid and some of it encouter each other to make a bubble of the gas and is released. It is not an actually phase change, it is the reverse process of diluting gas into liquid. Initially it is diluted gas, it gets released and in the end it is in gas phase.

One has shutoff valves for oxygen, while the other is for acetylene. Some torches come equipped with mixing valves that do not require the usage of oxygen shutdown valves.

Acetylene is a good option for gas welding steel because of its high flame temperature. Welding. Acetylene, when burned in oxygen, creates a reducing zone that quickly cleans the metal surface. In the inner flame cone, acetylene discharges roughly 40% of its heat.

This valve, which is usually found on a cutting torch, creates passageways that direct both oxygen and acetylene to the mixing chamber.

Therefore, \(2C_2H_2(g)+ 5o_2(g)\)→\(4Co_2(g) + 2H_2o(g) + 2600KJ\)  Is the balanced equation. Metal is welded when two parts are heated to a temperature where a shared pool of molten metal forms.

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Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

Force = 50 × 5

We have the final answer as

Hope this helps you

The statement "Even though the full oxidation of glucose is exergonic, some of the reactions in glycolysis are endergonic" is a TRUE statement.

Glycolysis is the metabolic pathway of reactions that convert glucose into pyruvate (in the presence of oxygen) or lactate (in the absence of oxygen). There are ten sequences of reactions in it catalyzed by enzymes.

The overall reactions of glycolysis are exergonic, which means energy is released into its surroundings, However, some of the reactions within glycolysis absorb energy instead of releasing energy, making them endergonic reactions. One of them is the second reaction in glycolysis, where isomerase catalyzes the isomerization of G-6-P to F-6-P.

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Answer:

THE NAME OF THE ATOM IS NEON

Explanation: BECAUSE THE ATOM HAS 10 ELECTRONS AND ITS SYMBOL IS NE

Answer:

Osmosis is a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one equalizing the concentrations on each side of the membrane.

Explanation:

Answer:

Explanation: the answer is YES

CO(NH2)2  and (NH2)2 CO is the urea

(1) Here you first calculate the amount of substance from the mass and the molar mass. Then you multiply by the constant.

first: n = m / M             then: n * 6 * 10²³ = number of atoms

a) n = 4 g / 24 g/mol            number of atoms = 0,166 mol * 6 * 10²³ 1/mol

   n = 0,166 mol                   number of atoms = 0,96 * 10²³

b) n = 0,12 g / 12 g/mol       number of atoms = 0,01 mol * 6 * 10²³ 1/mol

   n = 0,01 mol                    number of atoms = 0,06 * 10²³

c) n = 32 g /48 g/mol         number of molecules = 0,666 mol * 6 * 10²³ 1/mol

   n = 0,666 mol                number of molecules = 4 * 10²³

d) n = 14,2 g / 71 g/mol      number of molecules = 0,2 mol * 6 * 10²³ 1/mol

   n = 0,2 mol                     number of molecules = 1,2 * 10²³

   Sodium sulfate has the formula Na2SO4, so it has two sodium atoms per  

   molecule. So you have to multiply the number of molecules by 2.

   number of atoms = number of molecules * 2

   number of atoms = 1,2 * 10²³ * 2

   number of atoms = 2,4 * 10²³

(2) The amount of substance can easily be calculated:

n = m / M

a) n = 16 g / 16 g/mol

   n = 1 mol

b) n = 0,14 g / 14 g/mol

   n = 0,01 mol

c) n = 5,4 g / 108 g/mol

   n = 0,05 mol

d) n = 8,88 g / 35,5 g/mol

   n = 0,25 mol

(3) With the same formula the mass can now be calculated, for this it only has to be converted according to the mass:

n = m / M      | *M

m = n * M

a) m = 0,05 mol * 16 g/mol

   m = 0,8 g

b) m = 10 mol * 23 g/mol

   m = 230 g

c) m = 0,01 mol * 1 g/mol

   m = 0,01 g

d) m = 0,25 mol * 65,4 g/mol

   m = 16,35 g

(4) The molar mass of a molecule is obtained by adding the molar masses of the individual atoms:

a) Br = 80 g/mol → Br2 = 2 * 80 g/mol = 160 g/mol

b) C = 12 g/mol, O = 16 g/mol → CO2 = 12 g/mol + 2 * 16 g/mol = 44 g/mol

c) H = 1 g/mol, N = 14 g/mol, O = 16 g/mol

  → HNO3 = 1 g/mol + 14 g/mol + 3* 16 g/mol = 63 g/mol

d) Cu = 64 g/mol, S = 32 g/mol, O = 16 g/mol,  H = 1 g/mol

   →CuSO4*5H2O = 64 g/mol + 32 g/mol + 4 * 16 g/mol + 5 * (2 * 1 g/mol +

     16 g/mol) = 250 g/mol

(5) Exercise 5 works exactly like exercise 2 and 4:

first: Calculate molar mass                    then: n = m / M

a) n = 128 g / 16 g/mol

   n = 8 mol

b) M = 39 g/mol + 14 g/mol + 3 * 16 g/mol

   M = 101 g/mol

   n = 25,25 g / 101 g/mol

   n = 0,25 mol

c) M = 2 * 12 g/mol + 6 * 1 g/mol + 16 g/mol

   M = 46 g/mol

   n = 414 g / 46 g/mol

   n = 9 mol

(6) Exercise 6 works exactly the same as exercises 3 and 4:

first: Calculate molar mass                    then: m = n * M

a) M = 32 g/mol + 2 * 16 g/mol

   M = 64 g/mol

   m = 2 mol * 64 g/mol

   m = 128 g

b) M = 2 * 1 g/mol + 32 g/mol + 4 * 16 g/mol

   M = 98 g/mol

   m = 20 mol * 98 g/mol

   m = 1960 g

c) M = 23 g/mol + 16 g/mol + 1 g/mol

   M = 40 g/mol

   m = 0,5 mol * 40 g/mol

   m = 20 g

For a metal crystallizes into a face-centered cubic unit cell and has a radius of 2.86 Angstrom, the density  is mathematically given as

d=3.31g/cm

Generally, the equation for the density  is mathematically given as

\(d=\frac{2*m}{NA*a^3}\\\\Therefore\\\\d=\frac{2*295.6mol}{6.022*10^23*(6.67*10^{-3})}\)

d=3.31g/cm

In conclusion, the density of this metal

d=3.31g/cm

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Answer:

Yes, its carried out under carefully controlled conditions because it might some times have a negative impacts towards humans.

Answer:

1 mole ozone gas

Explanation:

Since atomicity of Ozone (3) is maximum so, it will contain maximum number of atoms.

Air is mixture.

But pure air compound .

Explanation:

So the answer is Compound.

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The percentage of the compound is potassium is 22.53 %.

given that :

compound contains percentage of chromium = 39.37 %

compound contains percentage of oxygen = 38.10 &

compound contains percentage of potassium = ?

compound contains percentage of potassium = - 100%

                                         (percentage of chromium +  percent of  oxygen )

                                                  = 100 % - (39.37 % + 38.10 %)

                                                  = 100 % - 77.47 %

                                                  = 22.53 %

The percent of potassium in total percent of compound is 22.5 %.

Thus, a compound contains 39.37% chromium, 38.10% oxygen, and potassium. percentage of the compound is potassium is 22.53 %.

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As temperatures boom, decay charges of plant life increase. when flora decay they release methane, a greenhouse gasoline. wonderful. negative

A greenhouse gas is a gas that absorbs and emits radiant strength inside the thermal infrared variety, inflicting the greenhouse effect. The number one greenhouse gases in Earth's ecosystem are water vapor, carbon dioxide, methane, nitrous oxide, and ozone. the principal gases accountable for the greenhouse effect include carbon dioxide, methane, nitrous oxide, water vapor (which all arise certainly), and fluorinated gases (which might be artificial). Greenhouse gases have distinct chemical houses and are eliminated from the surroundings, over the years, by means of distinctive procedures.

A greenhouse fuel is referred to as that as it absorbs infrared radiation from the sun in the form of heat, that is circulated inside the atmosphere and eventually misplaced in space.

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The number of moles present in 643 g of beryllium oxide is 25.71 mol.

Generally, mole is defined as the amount of a substance that contains the same number of elementary particles ( which includes ions, molecules, or atoms) as the number of atoms present in carbon is called the mole.

Mathematically,

Number of moles = Given mass / Molar mass

Here,

Given mass of BeO = 643 g

Molar mass of BeO = 25.01158 g/mol

Number of moles = 643 / 25.01158 = 25.71 mol

Hence, the number of moles present in 643 g of beryllium oxide is 25.71 mol.

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The  three reaction profiles represent three different reactions, all of which occur at 298 k are exothermic reaction, endothermic reaction and no reaction (thermodynamically stable). When assuming the energy represents the enthalpy of the reaction.

A chemical process known as an exothermic reaction releases energy in the form of heat or light. These reactions, which are the antithesis of endothermic reactions, can be represented by the following chemical equation:

Energy + Reactants = Products.

Chemical processes referred to as endothermic reactions occur when the reactants take in heat energy from their environment to create products. These reactions produce a cooling effect by bringing the temperature of the space around them down.

A chemical system that is neither absorbing nor expending heat energy is said to be thermodynamically stable. The substance is not undergoing a chemical reaction and is consequently stable in the absence of a change in thermal energy.

Compound A: exothermic reaction

Compound B: endothermic reaction

Compound C: no reaction (thermodynamically stable)

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Calculate electrons

Total electrons=10+2=12

The element is Magnesium with symbol Mg as atomic no is 12

Additional:-

M:-

Excited state of magnesium

Answer:

The higher the frequency, the more energy the photon has. Of course, a beam of light has many photons. This means that really intense red light (lots of photons, with slightly lower energy) can carry more power to a given area than less intense blue light (fewer photons with higher energy)

Explanation:

Answer:

parallel circuit

Explanation:

Hope this is right!!

Answer:

welp it would be this option : Move the decimal in 85 TWO places to the right to decrease the value.

Explanation:

Answer:

Option A

Explanation:

Moving the decimal point 2 places to the right will give you 8500 cm=85m

Answer:

I guess the 1st one idk

1 - energy 2- heat 3 -plant

Nitrous acid has the chemical formula HNO2. To determine the number of oxygen atoms in 15 mg of nitrous acid, we need to first calculate the number of moles of nitrous acid in 15 mg. The molar mass of nitrous acid is 47.013 g/mol.

Therefore, 15 mg of nitrous acid is equivalent to 0.000319 moles. In one molecule of nitrous acid, there are two oxygen atoms. Thus, the number of oxygen atoms in 15 mg of nitrous acid would be 0.000319 moles multiplied by 2 oxygen atoms, which is equal to 0.000638 oxygen atoms. Therefore, there are approximately 0.000638 oxygen atoms in 15 mg of nitrous acid.
To find the number of oxygen atoms in 15 mg of nitrous acid (HNO2), first determine the number of moles of nitrous acid. Nitrous acid has a molar mass of 1(H) + 14(N) + 16(O) * 2 = 47 g/mol. Divide the mass by the molar mass: 15 mg / 47 g/mol = 0.00032 mol (convert mg to g).

Now, find the moles of oxygen atoms in nitrous acid. Each molecule of HNO2 has 2 oxygen atoms. So, 0.00032 mol HNO2 * 2 = 0.00064 mol of oxygen atoms.

Finally, calculate the number of oxygen atoms using Avogadro's number (6.022 x 10^23 atoms/mol): 0.00064 mol * 6.022 x 10^23 atoms/mol = 3.85 x 10^20 oxygen atoms in 15 mg of nitrous acid.

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The amount of sodium consumed by a person who eats two grams of salt depends on the sodium content of the salt.

Table salt is typically about 40% sodium, so 2 grams of salt contains approximately 0.8 grams of sodium (2 x 0.4 = 0.8).

Since 1 gram of sodium is equal to 2300 milligrams, then 0.8 grams of sodium is equal to 1844 milligrams (0.8 x 2300 = 1844).

So, a person who eats 2 grams of salt would consume approximately 1844 milligrams of sodium.

It is worth noting that the recommended daily intake of sodium is around 2300 milligrams, so this amount would be close to the recommended daily limit and it's important to monitor the sodium intake in your diet.

Sodium is an essential nutrient that is required for many important bodily functions, including fluid balance, nerve and muscle function, and maintaining healthy blood pressure levels. However, consuming too much sodium can have negative health effects, such as increased risk of heart disease, stroke, and high blood pressure.

That's why it's important to monitor the amount of sodium in your diet. The World Health Organization recommends that adults consume no more than 2,000 milligrams of sodium per day, which is equivalent to about 5 grams of salt. This is a moderate amount that can help maintain healthy blood pressure and reduce the risk of heart disease and stroke.

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Answer: The molecules in hot water move faster and are slightly further apart.

Explanation:

There's more space between the molecules, the volume of hot water has fewer molecules in it and weighs a little bit less than the same volume of cold water. So hot water is less dense than cold water.

Answer:

2.75 x 10^24 atoms

Explanation:

1 mole = 6.022 x 10^23 atoms

4.56 moles has:

4.56 x 6.022 x 10^23 = 2.75 x 10^24 atoms

The temperatures arranged from slowest to fastest particle movement are: 63.15 K, 10 K, 128 K, 233.15 K, and 400 K.

To arrange the temperatures according to particle movement from slowest to fastest, we need to consider the Kelvin temperature scale. The Kelvin scale is an absolute temperature scale where 0 Kelvin represents absolute zero, the point at which all particle motion ceases. To convert Celsius to Kelvin, we add 273.15.

Given:

-40 °C

10 K

400 K

-210 °C

128 K

Let's convert the temperatures to Kelvin and arrange them accordingly:

-40 °C + 273.15 = 233.15 K

10 K

400 K

-210 °C + 273.15 = 63.15 K

128 K

Arranging the temperatures from slowest to fastest particle movement:

63.15 K

10 K

128 K

233.15 K

400 K

Therefore, the temperatures arranged from slowest to fastest particle movement are: 63.15 K, 10 K, 128 K, 233.15 K, and 400 K.

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Answer:

A and C represent elements while B and D represent Compounds

Explanation:

chemical elements cannot be broken down into simpler substances by any chemical reaction. While A chemical compound is a chemical substance composed of many identical molecules composed of atoms from more than one element held together by chemical bonds