How many oxygen molecules are present in 113.97 liters of oxygen gas at STP?
A
6.8601 x 1025
OB.
6.8601 X 1024
C.
3.064 x 1024
D.
3.064 x 1023
E.
6.8601 x 1014

Answer:

Atom

Explanation:

An atom is the smallest unit which represents the an element.

It retains the chemical properties of an element.

Answer:

what are the following?

Answer

B. 11.2 grams

Explanation:

Molar mass of CaCl = 110.98 g/mol

Molar mass of KCl = 74.5513 g/mol

From the balanced chemical equation of the reaction given;

1 mole CaCl produced 2 moles KCl.

In grams;

(1 mol x 110.98 g/mol) CaCl produce (2 mol x 74.5513 g/mol) KCl, i.e

110.98 g CaCl produced 149.10236 g KCl,

Therefore, the grams of CaCl needed to produce 15.0 g KCl will be:

Therefore, 11.2 grams of calcium chloride are needed to produce 15.0 g of potassium chloride.

Answer:

The balanced chemical equation is:

2Br + 7O2 → 2Br2O7

From the equation, we can see that 7 moles of oxygen are required to react with 2 moles of bromine to form 2 moles of dibromine heptoxide.

First, we need to determine the limiting reagent:

The moles of oxygen gas can be calculated as:

n(O2) = m/M = 425 g / 32 g/mol = 13.28 mol

The moles of bromine can be calculated as:

n(Br) = m/M = 350 g / 80 g/mol = 4.375 mol

The limiting reagent is bromine because it is present in a smaller quantity.

Theoretical yield of dibromine heptoxide can be calculated using the moles of limiting reagent:

n(Br2O7) = n(Br) × (2 mol Br2O7 / 2 mol Br) × (7 mol O2 / 2 mol Br2O7) = 4.375 × 7 / 2 = 15.3125 mol

The molar mass of Br2O7 is:

M(Br2O7) = 2 × M(Br) + 7 × M(O) = 2 × 80 g/mol + 7 × 16 g/mol = 296 g/mol

The theoretical yield of dibromine heptoxide can be calculated as:

mass(Br2O7) = n(Br2O7) × M(Br2O7) = 15.3125 mol × 296 g/mol = 4534.375 g or 4.53 kg

Therefore, the theoretical yield of dibromine heptoxide is 4.53 kg.

The dew point is the temperature at which air becomes saturated and water vapor starts to condense.

Assuming a constant pressure, the dew point temperature of the air can be found using the formula:
dew point temperature = (237.7 * ln(RH/100) + (17.27 * T)/(237.7 + T))
where RH is the relative humidity and T is the temperature in degrees Celsius. Since the air is 100% saturated, RH = 100. Plugging in the given values, we get:
dew point temperature = (237.7 * ln(1) + (17.27 * 12)/(237.7 + 12))
Solving this equation, we get the dew point temperature to be approximately 12°C. This means that at a temperature of 12°C, the air will become fully saturated and reach its dew point, causing water vapor to condense into liquid droplets.
The dew point is the temperature at which air becomes saturated and water vapor starts to condense. To find the dew point temperature, we consider that the air's density is 10 g/m^3 and it's 100% saturated at 12°C. In this case, we need to find the temperature at which the air's relative humidity reaches 100%. Using the Clausius-Clapeyron equation or psychrometric charts, one can determine the dew point temperature based on the given conditions. Unfortunately, without knowing the air's actual water vapor content, we cannot provide an exact dew point temperature.

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A buffer is made from an acid - base conjugate pair as shown by option A

Buffers are often composed of weak acids and their conjugate bases (or weak bases and their conjugate acids). The weak acid can contribute a proton to balance any new base, whereas the conjugate base can absorb a proton to do so.

This balance between the acid and its conjugate base allows the buffer to survive pH changes. Buffers are essential in biological systems because many biochemical processes are particularly sensitive to pH changes.

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Answer:

it is ductile

Explanation:

i took the test

Answer:

b

Explanation:

The statement which best describes the most likely effect of the mismatch on future birds is that there could be a shift to later reproduction in the birds and is therefore denoted as option C.

This is referred to as the process in which an offspring is produced from their parent or cells and involves the fusion of gametes.

In the effect of mismatch on future birds, there will be a reduction in the birds getting a mate which therefore shift to later reproduction and is therefore the reason why option C was chosen as the correct choice.

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The statement that describes the most likely effect of the mismatch on future birds is that there could be a shift to later reproduction in the

birds.

So option C is correct.

Reproduction is described as the biological process by which new individual organisms offspring are produced from their "parent" or parents.

If there is mismatch on future birds, one of the many effects is that there could be a shift to later reproduction in the birds which the consequences of such mistiming in reproduction are reduced reproductive output.

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Kill him or PS5? Which one?

Answer:

The order and arrangement of the planets and other bodies in our solar system is due to the way the solar system formed. Nearest the Sun, only rocky material could withstand the heat when the solar system was young. For this reason, the first four planets—Mercury, Venus, Earth and Mars—are terrestrial planets.

Explanation:

Explanation:

Correct option is

D

3

The unbalanced chemical reaction is Al(s)+O

2

(g)→Al

2

O

3

(s)

Balance Al atoms by adding 2 to Al on LHS

2Al(s)+O

2

(g)→Al

2

O

3

(s)

Balance O atoms by adding

2

3

to O

2

on LHS

2Al(s)+

2

3

O

2

(g)→Al

2

O

3

(s)

Multiply the whole equation with 2.

4Al(s)+3O

2

(g)→2Al

2

O

3

(s)

This is the balanced chemical equation. The coefficient of O

2

is 3.

Answer:

d

Explanation:

Answer:

Radio waves

X-rays Visible

Explanation:

The wavelength of a wave is the difference between successive crests on a wave line. Waves with a very high wavelength have low energy.

Frequency is the number of waves that pass a point per unit of time. The higher the frequency, the higher a wave's energy.

Answer:

Radio waves

X-rays Visible

Explanation:

In acetylene, each carbon atom shares one pair of electrons with one hydrogen atom and three pairs of electrons with the other carbon atom.

A carbon atom has four electrons in its outermost shell and needs four electrons to be stable. In acetylene, two carbon atoms are covalently bonded with three electron pairs and the remaining one electron pair is covalently bonded with two hydrogen atoms.

Thus, both carbon and hydrogen atoms gain stability, so in acetylene each carbon atom shares one pair of electrons with a hydrogen atom and shares three pairs of electrons with another carbon atom.

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Answer:

3.) Fermentation

Explanation:

Ethanol = EtOH = C₂H₅OH

Combustion:

CH₄ + 2O₂ --> 2H₂O + CO₂

Esterification:

R-CO₂H + R-OH --> R-CO₂H-R' + H₂O

Fermentation:

C₆H₁₂O₆ --> 2C₂H₅OH + 2CO₂

Polymerization:

Hydrocarbons combining to make longer hydrocarbon chains

It attempts to explain the idea that:C. energy is quantized

Answer:

This question appears incomplete

Explanation:

This question appears incomplete because of the absence of options. However, hydrogen is placed in group 1 because it has just one electron in it's outermost shell (which happens to be the only shell it has) just like every other group 1A/group 1 element. While helium is placed in group 8A/group 18 because it has a completely filled outermost shell (which is also the only shell it has) just like every other element in group 8A/group 18.

In the periodic table hydrogen is placed in Group 1A (group 1) and helium is placed in Group 8A (group 18). The most likely reason for this is configuration, energy level and properties.

Hydrogen is located in group 1 of the periodic table, although its electronic configuration is 1s¹ and its properties do not correspond to those of the alkali metals of that group. But in its electronic configuration you can see that it has only one electron in its outermost shell (which turns out to be the only shell it has), just like any other element of group 1A /group 1, so it is located in that group.

On the other hand, although the electronic configuration of helium is 1s², this element does not appear in group 2 of the periodic table of elements, but is placed in group 18. This is because it has the energy level complete, so it has the properties of a noble gas, that is, it is inert (it does not react), and it is a colorless and odorless monatomic gas.

In summary, in the periodic table hydrogen is placed in Group 1A (group 1) and helium is placed in Group 8A (group 18). The most likely reason for this is configuration, energy level and properties.

Learn more:

The light bulb will take approximately 2.9 x 10² seconds to consume 2.30 x 10² joules of energy.

To calculate the time it takes for the light bulb to consume a given amount of energy, we can use the formula:

Time (in seconds) = Energy Consumed / Energy Consumption Rate

Given that the energy consumption rate of the light bulb is 80.0 joules per second, and we want to find the time it takes for the light bulb to consume 2.30 x 10² joules of energy, we can substitute these values into the formula:

Time = (2.30 x 10² joules) / (80.0 joules per second)

Time = 2.875 x 10² seconds

Time ≈ 2.9 x 10² seconds

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Answer:

Explanation:

adbc

Answer:

The correct statement should be The energies of electron are quantized when they are bounded to an atom.

In Quantum Mechanics The term Quantization used to measure the physical entities having certain discrete value. When we say energies of electron are quantized that means it have some specific values that are allowed, that is not continuous range of values.

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Answer:

Your ANSWER:

A.stir the hot cocoa

Explanation:

stirring helps particals dissolve faster

The density of the atom in grams per cubic centimeter (g/cm³ is 24.28 g/cm³

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

With the above formula, we can de terminate density of the atom. Detail below:

We'll begin by calculatingg thge v plume of the atom. This is illustrated below:

V = 4/3πr³

V = 4/3 × 3.14 × (69×10⁻¹⁰)³

Volume of atom = 1.38×10⁻²⁴ cm³

The density of the atom can be o brained as follow:

Density = mass / volume

Density of atom = 3.35×10⁻²³ / 1.38×10⁻²⁴

Density of atom = 24.28 g/cm³

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Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

The half-life formula for radioactive decay is given by: \(N = N_{0} . (1/2.)(t/t1/2)\), Where: N = number of radioactive atoms remaining after time t, N0 = initial number of radioactive atoms, t = elapsed time artifact would be approximately 16,100 years old.

Substituting the given values, we get: 20 = 100 x (1/2). (t/5700) Taking the natural logarithm of both sides, we get: ln(20) = ln(100) - (t/5700) ln(2). Solving for t, we get: t = (5700 ln(5)) / ln(2), t ≈ 16,100 years. artifact would be approximately 16,100 years old.  

This formula is used in historical analysis of the artifacts found during archeological progress. By Half life formula, the age comes to be almost 16,100 years.

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Answer:

if you meant 3.82* 10^24, the answer is 6.34551495 moles

if you meant 3.28*1024, the answer is 6.49780731*10^-21 moles

since you're going from molecules to moles, you need to divide by Avogadro's number which is 6.02*10^23

Answer:

to the first

A) mass

to the second

B) Volume

The volume of a solution of iron (III) chloride is 1565.29 mL when it has a density of 1.118 g/mL and a mass of 1.75 kg.

Density may be defined as a type of physical property that significantly deals with the description of how much space an object or substance takes up with respect to the amount of matter in that object or substance.

In a more simple sense, it is characterized as the measurement of quantity or mass per unit of volume in a particular substance.

According to the question,

The density of iron chloride solution = 1.118 g/mL.

The mass of iron chloride solution = 1.75 kg.= 1750 g.

The formula for calculating the density is as follows:

Volume = 1750 g/1.118g/mL = 1565.29 mL.

Therefore, the volume of a solution of iron (III) chloride is 1565.29 mL when it has a density of 1.118 g/mL and a mass of 1.75 kg.

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Answer:

20 m/s

Explanation:

solution,

initial velocity (u)=0 m/s

Distance covered(s)=100m

Time taken(t)=10 seconds

Acceleration (a)=2m/s²

Now,

By using first equation of motion, we have

v=u+at

=0+2×10

=20 m/s

I hope it helped U

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