PLEASE HELP ME WILL GIVE 60 POINTS Plot a graph of volume vs temperature(in Kelvins) With the two data points that resolved from your experiment. Draw a straight line connecting the two points, thus assuming a linear relationship between volume and temperature.
The x intercept correspond to where the volume would be 0 and the temperature can be no lower, define as absolute zero was you intercept. Absolute zero is 0 L . Compare Your results to do You're results to those expected.How close to absolute 0 was your intercept.How close to absolute 0 was your intercept why am I at your value be different from absolute 0?
What conclusions can you make about the relationship between the volume of a gas and its temperature?
What conclusions can you make about the relationship between the volume of a gas and its pressure?
What possible variables have you not accounted for? As you the procedure it is possible with that atmospheric pressure may have changed? If did change over the course of your experiment then how would you results have been affected?

Answer:

349.22°C

Explanation:

Let the final temperature of the two pieces of metal be x.

Now, the warmer metal which is C u reduces from 475°C to x. Thus Δt for C u is; Δt1 = 475 - x.

The cooler metal Cr increases in temperature from 265°C to x. Thus, it's change in temperature is Δt for Cr is; Δt2 = x - 265.

Now from conservation of energy, the amount of energy leaving the C u metal is equal to the amount of energy entering the Cr metal.

Thus;

q_lost = q_gain

Where;

q_lost = m1•c1•Δt1

q_gained = m2•c2•Δt2

Now, c1 & c2 are the specific heat capacity of C u and Cr respectively.

From online tables, c1 = 0.385 J/g°C and c2 = 0.46 J/g°C

We are given;

m1 = 12g and m2 = 15g

Thus;

12 × 0.385 × (475 - x) = 15 × 0.46 × (x - 265)

2194.5 - 4.62x = 6.9x - 1828.5

6.9x + 4.62x = 2194.5 + 1828.5

11.52x = 4023

x = 4023/11.52

x = 349.22°C

Answer:

D. Supported by observations

Explanation:

Because theories change over time, they both need to be proven, they do not go off of consensus, but they do need to be supported by observations.

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Answer:

720

Explanation: study island

Answer:

720

Explanation:

Answer:

its d

Explanation:

i did the quiz

The OH⁻ concentration in an aqueous solution at 25 °C is 7.9 × 10⁻³M, then the concentration of H⁺ ion is 1.28 × 10⁻¹²M.

Concentration of H⁺ will be calculated by using the below equation as:
pH = -log[H⁺]

Or [H⁺] = [tex]10^{-pH}[/tex]

Also we know the realation pH + pOH = 14 and pOH will be calculated as:

pOH = -log[OH⁻]

Given that, [OH⁻] = 7.9 × 10⁻³M

pOH = -log(7.9 × 10⁻³)

pOH = -(-2.102) = 2.102

Putting this value in above realation equation, we get

pH = 14 - 2.102 = 11.89

Now calculating the concentration of H⁺ by using this pH as:

[H⁺] = [tex]10^{-11.89}[/tex]

[H⁺] = 1.28 × 10⁻¹²M

Hence required concentration of [H⁺] is 1.28 × 10⁻¹²M.

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Answer:what are the options????

Explanation:

Answer:

D. The Alveoli.

Explanation:

Number of atoms = number of moles x 6.02 x 10²³

The mole is the number of particles contained in a substance

1 mol = 6.02 x 10²³ particles

mol of Sodium carbonate​-Na₂CO₃

MW = 106 g/mol

mass Na

[tex]\tt \dfrac{2\times 23}{106}\times 5.3=2.3[/tex]

mol Na

[tex]\tt \dfrac{2.3}{23}=0.1[/tex]

number of atoms = 0.1 x 6.02 x 10²³ = 6.02 x 10²²

mass C

[tex]\tt \dfrac{12}{106}\times 5.3=0.6[/tex]

mol C

[tex]\tt \dfrac{0.6}{12}=0.05[/tex]

number of atoms = 0.05 x 6.02 x 10²³ = 3.01 x 10²²

mass O

[tex]\tt \dfrac{3.16}{106}\times 5.3=2.4[/tex]

mol O

[tex]\tt \dfrac{2.4}{16}=0.15[/tex]

number of atoms = 0.15 x 6.02 x 10²³ = 9.03 x 10²²

Answer:

-6.78 × 10⁴ J

Explanation:

When water condenses (goes from the gaseous state to the liquid state) it releases energy in the form of heat. We can calculate this heat using the following expression.

Q = ΔH°cond × m

where,

Q is the heat released

ΔH°cond is the latent heat of condensation (ΔH°cond of water is -2260 J/g)

m is the mass

Q = ΔH°cond × m

Q = -2260 J/g × 30.0 g

Q = -6.78 × 10⁴ J

Answer:

Given the two half-reactions, what must be done in the next step before the reaction can be balanced?

Answer: Show the number of electrons being lost or grained.

Explanation:

For a two given half-reactions, before the reaction can be balanced determine the number of electrons being lost or grained.

A half reaction is either the oxidation or reduction reaction component of a redox reaction.

The half reaction is obtained by considering the change in oxidation states of individual substances involved in the redox reaction.

Thus, for a two given half-reactions, before the reaction can be balanced determine the number of electrons being lost or grained.

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Answer:

The answer is true

Explanation: Because The law of multiple proportions states that when two elements react to form more than one compound, a fixed mass of one element will react with masses of the other element in a ratio of small, whole numbers.

Answer:

It is an Anion because there are more electrons than protons making it negative

Answer:

HF, NaF

Explanation:

A buffer system may be formed in one of the following ways:

Which of the following mixtures may act as a buffer solution?

Answer:

The maximum possible yield strength for a single crystal is 70 MPa.

Explanation:

To find the maximum possible yield strength for a single crystal we need to use the following equation:

[tex]\sigma_{y} = \frac{\tau_{CRSS}}{m_{max}}[/tex]

Where:

[tex]m_{max}[/tex] is the maximum value for Schmid factor

[tex]\tau_{CRSS}[/tex] is the critical resolved shear stress = 35 MPa

[tex] \sigma_{y}[/tex] is the yield strength =?    

The Schmid factor is given by:

[tex]m = cos(\phi)cos(\lambda)[/tex]

And its maximum value is obtained when λ = 45° and Φ = 45°, so:

[tex] m = cos(45)cos(45) = 0.5 [/tex]

Finally, the maximum possible yield strength is:

[tex]\sigma_{y} = \frac{\tau_{CRSS}}{m_{max}} = \frac{35 MPa}{0.5} = 70 MPa[/tex]

Therefore, the maximum possible yield strength for a single crystal is 70 MPa.

I hope it helps you!                                                                                  

Answer:

opposite

Explanation:

Answer:

opposite

Explanation:

cu9c9ucoucucpucfpufupfpucupvpjvpucu

Answer:

6 atoms

Explanation:

We are given:

Density of Olive oil = 0.92 g / mL

Mass of 20 mL Olive oil:

We know that the density = 0.92 grams / mL

multiplying the numerator and the denominator by 20

Density = 0.92 * 20 grams / 20 mL

Density = 18.4 grams / 20 mL

So, we have 18.5 grams in 20 mL of Olive oil

Volume of 20 grams Olive oil:

We need to multiply the numerator and the denominator of density by a number, that when multiplied by 0.92 will give 20

let that number be x:

0.92 * x = 20

x = 20/0.92

x = 21.74 (approx)

Multiplying the numerator and the denominator by x:

Density = 0.92 grams / 1 mL

Density = 0.092 * 21.74 / 21.74 mL

Density = 20 grams / 21.74 mL

So, we can see that 20 grams of the oil will have the volume 21.74 mL

CALCULATION OF DENSITY:

Density = mass (g) ÷ volume (mL)

The density of olive oil is given as: 0.92g/mL

QUESTION 1:

Mass = density × volume

Mass = 0.92g/mL × 20

Mass of olive oil = 18.4grams.

QUESTION 2:

Volume = mass ÷ density

Volume = 20 ÷ 0.92

Volume of olive oil = 21.74mL

Therefore;

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Answer:

Explanation:

Net force F = 1800 N

acceleration a = 1.5 m /s²

mass = m

mass = force / acceleration

= 1800 / 1.5

m = 1200 kg

The mass of the vehicle to the nearest kilogram is 1200 Kg

The force acting on an object is defined by the following equation

Force (F) = mass (m) × Acceleration (a)

F = ma

With the above formula, we can obtain the mass of the vehicle as follow:

Force (F) = 1800 N

Acceleration (a) = 1.5 m/s²

[tex]m = \frac{F}{a} \\ \\ m = \frac{1800}{1.5} \\ \\ m = 1200 \: Kg[/tex]

Therefore, the mass of the vehicle is 1200 Kg

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Answer:

Muscle cells use fatty acids, glucose, and amino acids as energy sources. Most cells use glucose for ATP synthesis, but there are other fuel molecules equally important for maintaining the body's equilibrium or homeostasis

Explanation:

Answer:

Most cells use glucose for ATP synthesis, but there are other fuel molecules equally important for maintaining the body's equilibrium or homeostasis. Indeed, although the oxidation pathways of fatty acids, amino acids, and glucose begin differently, these mechanisms ultimately converge onto a common pathway, the TCA cycle, occurring within the mitochondria (Figure 1). As mentioned earlier, the ATP yield obtained from lipid oxidation is over twice the amount obtained from carbohydrates and amino acids.

Answer:

632.7 secs

Explanation:

Equation of the reaction:

Tl^3+ + 3e ------> Tl

If 1F = 96500 C

Q= It

Where;

I= current

t= time

3× 96500 C deposited 204 g of Tl

0.868 × t deposited 0.387 g of Tl

3 × 96500 × 0.387 = 204 × 0.868 × t

t= 3 × 96500 × 0.387/ 204 × 0.868

t= 632.7 secs

The time required for a constant current of 0.868 A to deposit 0.387 g of Tl(III) as Tl(s) is 2689 s

We'll begin by calculating the quantity of electricity needed to deposit 0.387 g of Ti

Ti³⁺ + 3e —> Ti

Recall:

1 mole of Ti = 48 g

1 electron (e) = 96500 C

Thus,

3 electrons = 3 × 96500 = 289500 C

From the balanced equation above,

48 g of Ti was deposited by 289500 C of electricity.

Therefore,

0.387 g of Ti will be deposited by = (0.387 × 289500) / 48 = 2334.09375 C of electricity

Quantity of electricity (Q) = 2334.09375 C

Current (I) = 0.868 A

t = Q / I

t = 2334.09375 / 0.868

Therefore, the time required for the reaction is 2689 s

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Answer:

7.812atm

Explanation:

Using Van der Waals equation, which goes as follows:

Pv = nRT

Where;

P is the pressure

V is the volume (4.635L)

n is the number of moles (1.475mol)

T is the temperature (299K)

R is the universal gas constant (0.082057 L atm mol-1K-1)

Pv = nRT

P = nRT/V

P = 1.475 × 0.0821 × 299/4.635

P = 36.2081/4.635

P = 7.812atm

1: FALSE The physical properties of metals include shininess, malleability, ductility, and conductivity.

2: FALSE Neutrons are the particles in an atom that have a neutral charge. They aren't positive like protons. They aren't negative like electrons.

3: TRUE Dmitri Ivanovich Mendeleev was a Russian chemist and inventor. He is best remembered for formulating the Periodic Law and creating a farsighted version of the periodic table of elements. He is also known as the "father of the periodic table"

Answer:

1.T, 2.F., 3.T

Explanation:

2 is false because electrons have a negative charge neutrons have no charge

Answer:

An increase on temperature.

Explanation:

Answer: adding a catalyst or increasing temperature

Explanation:

Answer:

m*s⁻¹.

Explanation:

Hello!

In this case, since the frequency measures how repetitive an event is per unit of time, for instance the laps a car drives every 5 minutes or something similar, we can infer it has units of event/time; in such a way, the unit m*s⁻¹ is not a proper unit of frequency because it is a proper unit of velocity which is the distance traveled per unit of time.

In such a way, Hz (hertz), s⁻¹ and 1/s are possible ways frequency can be represented.

Best regards!