What’s the volume of the solution?

Answer:

D.) State the question, form a hypothesis, conduct an experiment

Explanation:

https://www.colorincolorado.org/article/steps-scientific-process

Answer: 7 g

Explanation: 42/6=7

Answer:

Explanation: Fractional distillation

Answer:

When something crashes it affects the motion of an object because what it crashed into had force going in the opposite direction.

Explanation:

The mass of the Na is 743.38 g.

The law of conservation of mass, also known as Lavoisier's law or the principle of mass conservation, states that in a closed system, the total mass of the system remains constant over time, regardless of the changes that occur within the system.

This means that the total amount of matter in a system cannot be created or destroyed, only transformed from one form to another.

We now know that the total mass is 829.40 g

Mass of the Na = 829.40 g - 86.02 g

= 743.38 g

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The timing of the tide is predictable by the moon's orbit around the earth is predictable

Tides are the periodic rise and fall of surface water caused by the gravitational force of the moon and sun, as well as the rotation of the earth. The movements of the solar system that influence the tides are predictable, so changes in tide height and time are predictable.

Tides can be predicted accurately and far in advance. Tides are caused by the orbital relationships between the Earth, the Moon, and the Sun. These relationships are well understood, and the positions of the celestial bodies can be predicted very accurately in the future.

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The amount of heat required to raise the temperature of the 34.2 g sample of aluminum by 34 oC is 1043.52 J.

What is Temperature?

Temperature is a measure of the average kinetic energy of the particles in a substance. It is a physical property that determines the direction of heat flow between two objects or systems in contact with each other. Temperature is measured in degrees Celsius (°C) or Fahrenheit (°F), or in kelvin (K) in the International System of Units (SI).

The amount of heat (q) required to raise the temperature of a substance can be calculated using the formula:

q = m x c x ΔT

Where:

m = mass of the substance (in grams)

c = specific heat of the substance (in J/g oC)

ΔT = change in temperature (in oC)

Plugging in the values given:

m = 34.2 g

c = 0.9 J/g oC

ΔT = 34 oC

q = (34.2 g) x (0.9 J/g oC) x (34 oC)

q = 1043.52 J

Therefore, the amount of heat required to raise the temperature of the 34.2 g sample of aluminum by 34 oC is 1043.52 J.

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The question is confusing, but if you are saying that the heat of vaporization is 393 joules per gram, and 30 grams condense, then the answer is simply 30 * 393 = 11790 joules.

Global warming brought on by rising carbon dioxide concentrations in the atmosphere is changing weather patterns and ocean temperatures. Changes in precipitation patterns are being brought on by the warming of the atmosphere.

Because it is one of the gases in the atmosphere that causes the greenhouse effect, which causes the Earth to warm, carbon dioxide is known as a greenhouse gas. Long-wavelength infrared radiation (heat) from the Earth is absorbed by carbon dioxide molecules in the atmosphere, and some of it is then radiated back downward.

Similarly, as air temperatures rise in response to rising carbon dioxide concentrations, more water vapor escapes into  the atmosphere—which then amplifies greenhouse heating

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Answer:

(d) In the presence of sulfuric acid, calcium chloride reacts to form hydrogen chloride.

Explanation:

It's because it lowers the melting point of the ice / etc so I think it is, but check it yourself too!

Answer:

= 3.456 × 1011

Explanation:

Answer:

1) 0.468 atm

Slide 4: 9.2 atm Slide 5: D B E

Slide 6:

Gas A 1.31,

Gas B 0.444

Explanation:

edge 2022

The inside of a basketball has a pressure of 0.476 atm at 25.0°C. The pressure inside the ball if the temperature is decreased to 20.0°C is 0.484 atm.

The term pressure is defined as the amount of force applied perpendicular to the surface of an object per unit area. The symbol for it is "p" or P.

There are two basic types of pressure are absolute and gauge - distinguished by what pressure they are compared to, which is called the reference pressure.

Given:

P1 = 0.476 atm

T1 = 25.0°C = 298K

P2 = ?

T2 = 20.0°C = 293 K

P1T1 = P2T2

By putting these values in above equation and we get,

P2 = P1T1/ T2

= 0.476 ×298 / 293

= 0.484 atm

Thus, the pressure inside the ball if the temperature is decreased to 20.0°C is 0.484 atm.

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To calculate the molality of a solution, we need to know the number of moles of solute per kilogram of solvent.

In this case, the solute is ethyl alcohol (C2H5OH) and the solvent is water.

First, let's convert the mass of ethyl alcohol into moles:

molar mass of C2H5OH = 46.07 g/mol

moles of C2H5OH = 2.5 g / 46.07 g/mol = 0.054 mol

Next, we need to calculate the mass of water in the solution:

mass of water = 0.4 kg = 400 g

Finally, we can use the moles of solute and mass of solvent to calculate the molality of the solution:

molality = moles of solute / mass of solvent (in kg)

molality = 0.054 mol / 0.4 kg

molality = 0.135 mol/kg

Therefore, the molality of the solution is 0.135 mol/kg.

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Answer:10.71 g

Explanation:

Answer:

Geology

Explanation:

Geology is not a branch of biology.

Biology is the study of all forms of lives. Bio - life and logy - study

It consists of studies of plants, animals and micro-organisms. Some of its sub-branches are zoology, botany, genetics, micro-biology e.t.c.

Answer:

geology

Explanation: I took the test.

The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.

In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.

The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.

During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.

The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.

The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.

In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.

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Answer:

b.  growth in the size of the mineral grains

Explanation:

Non-foliated texture shown by a metamorphic change is depicted by growth in the size of the mineral grains.

Answer:

its b home slice

Explanation:

Answer:

false.

Explanation:

black overlays any color.

Answer:

How do amoeba respire.

Define Diffusion.

Step 1

Water is supposed to be in the gas phase and it is assumed that it is an ideal gas.

Therefore, it can be applied:

p x V = n x R x T (1)

p = pressure = 6.32 atm

V = volume = 39.2 L

n = moles = unknown

R = gas constant = 0.082 atm L/mol K

T = absolute temperature = 486 °C + 273 = 759 K

-------------------

Step 2

n is cleared from (1):

p x V/R x T = n

(6.32 atm x 39.2 L)/(0.082 atm L/mol K x 759 K) = n

3.98 moles = n

Answer: number of moles = 3.98 moles

The limiting reactant is N₂O₄ and the mass of N₂ formed from the reaction is 45.7 g (Option C)

The limiting reactant can be obtained as illusrated below:

N₂O₄ + 2N₂H₄ -> 3N₂ + 4H₂O

From the balanced equation above,

92.02 g of N₂O₄ reacted with 64.1 g of N₂H₄

Therefore,

50 g of N₂O₄ will react with = (50 × 64.1) / 92.02 = 34.83 g of N₂H₄

From the above calculation, we can see that only 34.83 g of N₂H₄ out of 45.0 g reacted.

Thus, the limiting reactant is N₂O₄

The limiting reactant shall be used in this case in order to obtain a maximum yield of N₂. Details below:

92.02 g of N₂O₄ reacted to produce 84.06 g of N₂

Therefore,

50 g of N₂O₄ will react to produce = (50 × 84.06) / 92.02 = 45.7 g of N₂

Thus, the mass of N₂ formed is 45.7 g

Therefore, the correct answer to the question is (Option C)

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Answer:

154 g

Explanation:

Step 1: Write the balanced decomposition equation

2 NaN₃(s) ⇒ 2 Na(s) + 3 N₂(g)

Step 2: Calculate the moles corresponding to 79.5 L of N₂ at STP

At STP, 1 mole of N₂ occupies 22.4 L.

79.5 L × 1 mol/22.4 L = 3.55 mol

Step 3: Calculate the number of moles of NaN₃ needed to form 3.55 moles of N₂

The molar ratio of NaN₃ to N₂ is 2:3. The moles of NaN₃ needed are 2/3 × 3.55 mol = 2.37 mol.

Step 4: Calculate the mass corresponding to 2.37 moles of NaN₃

The molar mass of NaN₃ is 65.01 g/mol.

2.37 mol × 65.01 g/mol = 154 g

Conifers are non flowering plants that possess special cones to carry out reproduction. When conifers reproduce using these special structures, it is a form of Sexual reproduction.

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In an ecosystem, based on their scientific names, you know the cats felis catus and felis bieti do not belong to the same species.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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In the J = 0 state, the BrF molecule does not undergo any revolutions per second. In the J = 1 state, it undergoes approximately 0.498 revolutions per second, and in the J = 10 state, it undergoes approximately 15.71 revolutions per second.

To calculate the rotational constant B, we can use the formula:

B = 1 / (2 * π * Δν)

Where:

B = rotational constant

Δν = spacing between consecutive lines in the rotational spectrum

Given that the spacing between consecutive lines is 0.71433 cm^(-1), we can substitute this value into the formula:

B = 1 / (2 * π * 0.71433 cm^(-1))

B ≈ 0.079 cm^(-1)

The moment of inertia (I) of the molecule can be calculated using the formula:

I = h / (8 * π^2 * B)

Where:

h = Planck's constant

Given that the value of Planck's constant (h) is approximately 6.626 x 10^(-34) J·s, we can substitute the values into the formula:

I = (6.626 x 10^(-34) J·s) / (8 * π^2 * 0.079 cm^(-1))

I ≈ 2.11 x 10^(-46) kg·m^2

The bond length (r) of the molecule can be determined using the formula:

r = sqrt((h / (4 * π^2 * μ * B)) - r_e^2)

Where:

μ = reduced mass of the molecule

r_e = equilibrium bond length

To calculate the wavenumber (ν) of the J = 9+ to J = 10 transition, we can use the formula:

ν = 2 * B * (J + 1)

Substituting J = 9 into the formula, we get:

ν = 2 * 0.079 cm^(-1) * (9 + 1)

ν ≈ 1.58 cm^(-1)

To determine the most intense spectral line at room temperature (300 K), we can use the Boltzmann distribution law. The intensity (I) of a spectral line is proportional to the population of the corresponding rotational level:

I ∝ exp(-E / (k * T))

Where:

E = energy difference between the levels

k = Boltzmann constant

T = temperature in Kelvin

At room temperature (300 K), the population distribution decreases rapidly with increasing energy difference. Therefore, the transition with the lowest energy difference will have the most intense spectral line. In this case, the transition from J = 0 to J = 1 will have the most intense spectral line.

To calculate the number of revolutions per second, we can use the formula:

ω = 2 * π * B * J

Where:

ω = angular frequency (in radians per second)

J = rotational quantum number

For J = 0:

ω = 2 * π * 0.079 cm^(-1) * 0 = 0 rad/s

For J = 1:

ω = 2 * π * 0.079 cm^(-1) * 1 ≈ 0.498 rad/s

For J = 10:

ω = 2 * π * 0.079 cm^(-1) * 10 ≈ 15.71 rad/s

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Answer:

297.15kelvin is the correct answer

Answer:297 k

Explanation:

The balanced chemical equation is AlI₃(s) + 3 K(s) → 3 KI(s) + Al(s). The number of moles of aluminium will be 2.437moles.

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Answer:

Explanation:

Here, we want to get the pH of the given molecule

Firstly,we write the ionization equation so as to get the number of hydrogen atoms from its dissociation

We have this as:

The Pka value for formic acid is 3.75

We have it that:

Using the ICE equation for the equilibrium constant,we have it that:

Thus, we have:

Since x is very small as opposed to tthe initial acid concentration, we approximate x as 0 below

Thus,we have:

Finally, we know that the pH is the negative logarithm to base 10 of the concentration of hydroxonium ion