you fill a balloon with 10.0 g of n2 gas. you wish to add 10.0 g of another gas to make the balloon more than twice as large as it is with only the n2 (that is, more than twice the original volume). which gas should you add (assume constant temperature)?

The volume of the gas sample will be 1.79 L.

A liquid, solid, or gas's volume represents the amount of three-dimensional space it occupies. Although there are many additional units that can be used to indicate volume, the most used ones are liters, cubic meters, gallons, milliliters, teaspoons, as well as ounces.

Given data :

Mass of \(O_{2}\) = 1.20 g

Mass of \(N_{2}\) = 1.43 g

Number of moles can be calculated by suing the formula:

Number of moles of \(O_{2}\) = Mass / molar mass = 1.20 / 32 = 0.03 mol

Number of moles of \(N_{2}\) =  Mass / molar mass  = 1.43 / 28 = 0.05 mol

So, the total count of moles can be calculated by :

Total moles = moles of \(O_{2}\)  +  moles of \(N_{2}\)

Total moles = 0.03  + 0.05 = 0.08 mol

The volume of the gas at STP can be calculated as:

Volume = 0.08 mol × 22.4 mol/L

Volume = 1.79 L

Therefore, the volume of the gas sample will be 1.79 L.

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Answer:

Answer and Explanation:

In H2O molecules, due to formation of intermolecular hydrogen bonds, there is molecular association. Large amount of energy is required to break these intermolecular hydrogen bonds. Intermolecular hydrogen bonding is not possible in H2S. Hence, its boiling point is lower and is a gas.

Answer:

a. The limiting reagent is NO2.

b. 126g of nitric acid can be produced.

Explanation:

1st) It is necessary to write the balanced equation:

From the balanced equation we know that 3 moles of NO2 (3x46g= 138g) react with 1 mol of water (18g/mol) to produce 2 moles of nitric acid (2x63g= 126g) and 1 mol of NO (30g/mol).

2nd) To calculate the limiting reagent it is necessary to use the given values and the stoichiometry of the balanced equation:

The 10.0g of NO2 will need 1.30g of H2O to react.

The 30.0g of H2O will need 230g of NO2 to react.

So, as we only have 10.0g of NO2 and 30.0g of H2O, the limiting reagent will be NO2.

3rd) Now, to calculate the theorical yield, we need to use the stoichiometry of the balanced equation using the limiting reagent:

1 mol of H2O produces 2 moles of nitric acid. With the molar mass of nitric acid (63g/mol), we can calculate the grams.

Finally, 126g of nitric acid will be produced if the reaction is 100% efficient (theoretical yield).

The empirical formula of a compound containing 0.347 mole P to 1.031 mole Cl is PCL3.

Empirical formula can be defined as a chemical formula, showing the ratio of elements in a compound rather than the total number of atoms.

From the given question,

Pick the smallest number in mole and then divide all the compound by that. Remember that if you calculate a number that is x0.9 round to the nearest whole number,

⇒ 0.347 moles of P / 0.347 = 1

⇒ 1.031 moles of Cl / 0.347 = 2.971 ≈ 3,

Lastly, the coefficients calculated in the previous step will become the subscripts in the chemical formula.

⇒ PCL3

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Answer:

Step 1) weathering of pre-existing rocks

Step 2) transport of the weathering products

Step 3) deposition of the material

Step 4) compaction of the sediments

Step 5) cementation of the sediment to form a rock.

Explanation: ^^^

False, Asbestos is a naturally occurring mineral fiber that was commonly used in various industries due to its heat resistance, strength, and insulating properties.

Asbestos does not necessarily need to be removed if it will not be disturbed or pose a risk to human health. Asbestos-containing materials that are in good condition and undisturbed are generally considered safe. However, if asbestos-containing materials are damaged, deteriorating, or will be disturbed during renovation or demolition activities, it is necessary to take appropriate precautions, which may include professional removal or encapsulation, to prevent the release of asbestos fibers into the air. The decision to remove asbestos should be based on an assessment of its condition, potential for disturbance, and adherence to local regulations and guidelines.

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Answer:

CaCo3---> CaO +CaO2

Explanation:

process of fracking

Answer:

The inner planets are also called terrestrial planets.

Explanation:

If Earth revolved at a faster rate, what would most likely be daylight hours would decrease. Therefore, option B is correct.

Earth's rotation can be described as the rotation of planet Earth around its own axis and changes in the orientation of the rotation axis in space. Earth rotates once in 24 hours around Sun, but once in 23 hours, 56 minutes, and 4 seconds w.r.t. other distant stars.

Earth's rotation can be slowed slightly with time therefore daylight was shorter in the past due to the tidal effects the Moon has on Earth's rotation.

The earth's spinning on its axis causes days to turn into nights. The rise and fall of tided effect on the Direction of the Wind, Cyclones, Ocean currents, and change of day and night.

If the earth's rotation becomes faster it will complete one spin in less than 24 hours therefore, the daylight hours would decrease.

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Answer:

it's A) or E)

others are not suitable cuz their melting point is weak.

Answer:

Gallium

Explanation:

Because the melting point is low and the drinks are usually around 60-70 degrees Celsius so it wil melt

Answer:

2.5 mcg of iron

Explanation:

Density is given as;

D= m/v

Where;

m= mass

v= volume

mass= ?

volume= 6.5 ml or 0.065 dl

d= 39 mcg/dL

m= density × volume

m= 39 mcg/dL × 0.065 dl

m= 2.5 mcg of iron

Answer:

the force needed to produce the same acceleration is 480kg

molar mass of PF5 = 125.966 g/mol

125 g PF5 × (1 mol PF5/125.966 g PF5) = 0.992 mol PF5

0.992 mol PF5 × (6.022 × 10^23 molecules PF5);

= 5.97 × 10^23 molecules PF5

Since there 5 fluorine atoms per molecule of PF5,

(5.97.× 10^23 molecules PF5) × (5 atoms F/1 molecule PF5)

= 2.99 × 10^24 atoms F

Classifying the substances according to the strongest solute-solvent interaction that will occur between the given substances and water during dissolution as ion-ion forces, dipole-dipole forces, ion-dipole forces, London dispersion forces, hydrogen bonding.

The solutions of the substances when they are dissolved in water they interact with the water, the tyupe of the solvent interaction for the compound is given as,

1. ion-ion forces

N/A

2. dipole-dipole forces

-CH3OH

-HF

3. ion-dipole forces

-MgI2

-CuCl2

4. London dispersion forces

N/A

5. hydrogen bonding -C2H5OH and NH3

The above are separated as per the dissolution behavior with water.

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Answer:

MCO₃ (s) -> MO (s) + CO₂ (g)

Explanation:

M = a metal

This process is called calcination and is generally used to remove impurities. It's most common use is to remove carbon from limestone.

CaCO₃ (s) -> CaO (s) + CO₂ (g)

C₂H₆, compound has a C-H bond with the lowest bond dissociation energy, hence option A is correct.

Toluene has the lowest bond dissociation energy because it undergoes hyper conjugation with the C-H protons.

The energy needed to break a bond and create two atomic or molecular fragments, each containing one of the original shared pair of electrons, is known as the bond dissociation energy.

As a result, an extremely stable bond has a high bond dissociation energy, meaning additional energy is required to break the binding.

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The mass of the water that was formed is 20 g

The law of conservation of mass states that the total mass of substances in a closed system remains constant during a chemical reaction. This means that the mass of the reactants must be equal to the mass of the products.

The law of conservation of mass is a fundamental principle of chemistry and is a cornerstone of our understanding of the behavior of matter and energy in chemical reactions.

The total mass that exploded is 30 grams hence the mass of the water that was formed is;

30 - (15 + 5)

= 20 g

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Answer:

the charge of the aluminum ion is +3

C. physical change

Explanation:

That's the answer

The isotope with mass number 28 is far more abundant than the other isotopes, as evidenced by the fact that 28.086 amu is quite close to this number.

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Answer:

Answer:

One way to prove that air is made of matter is to blow up a balloon. Before you add air into the balloon, it is empty and shapeless. When you puff air into it, the balloon expands, so you know it is filled with something—air is taking up space. You'll also notice that a balloon filled with air sinks to the ground.

Explanation:

The structure that separates the left atrium from the right atrium is called the interatrial septum.

The heart is divided into four chambers: two atria and two ventricles. The left atrium and the right atrium are the upper chambers of the heart. They receive blood from different parts of the body and pump it into the ventricles.

The structure that separates the left atrium from the right atrium is called the interatrial septum. The interatrial septum is a muscular wall that prevents the mixing of oxygenated and deoxygenated blood. It ensures that oxygen-rich blood from the lungs is directed to the left side of the heart, while deoxygenated blood from the body is directed to the right side of the heart.

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The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Answer:

D. CI

Explanation:

a p e x

Chlorine is the element which is not conserved in the given chemical equation AgNO\(_3\) + CaCl\(_2\) → AgCl + CaNO\(_3\). The correct option is option D.

An equation per a chemical reaction is said to be balanced if both the reactants as well as the products have the same number of atoms and total charge for each component of the reaction. In a nutshell, the two components of the reaction have an equal balance of mass and charge.

The components and byproducts of a chemical reaction are listed in an imbalanced chemical equation, but the amounts necessary to meet the conservation of mass are not specified. Chlorine is the element which is not conserved in the given chemical equation AgNO\(_3\) + CaCl\(_2\) → AgCl + CaNO\(_3\).

Therefore, Chlorine is the element which is not conserved in the given chemical equation AgNO\(_3\) + CaCl\(_2\) → AgCl + CaNO\(_3\). The correct option is option D.

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Answer:

A.outer-shell electrons of one atom are transferred to the inner electron shells of another atom.

Explanation:

In covalent chemical bond, outer shell share pair of electrons to fill both atoms outer shell. Covalent bond can be polar and non-polar. Hydrogen and carbon bonding is example of non-polar bonds; while hydrogen bonding with chlorine is polar covalent bond example