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VARVARA [1.3K]
3 years ago
7

The testable question in a science investigation reads: “How does the size of a motor affect the speed of the vehicle?” What is

the independent variable in the question?
A) the sizes of motors


B) the brands of motors


C) the varying speeds


D) the types of vehicles
Chemistry
1 answer:
deff fn [24]3 years ago
3 0

The independent variable for this question would be A) the sizes of motors.

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If you are given an ideal gas with pressure (p)259,392.00 pa and temperature (T)=200°c of 1 mole Argon gas in a volume 8.8dm3,ca
GuDViN [60]

Answer: R=4.82436 \frac{Pa. m^{3}}{mol. K}

Explanation:

The Ideal Gas equation is:  

P.V=n.R.T  (1)

Where:  

P is the pressure of the gas  

n the number of moles of gas  

R=8.3144598 \frac{Pa. m^{3}}{mol. K} is the gas constant  

T is the absolute temperature of the gas in Kelvin.

V is the volume

It is important to note that the behavior of a real gas is far from that of an ideal gas, taking into account that <u>an ideal gas is a single hypothetical gas</u>. However, under specific conditions of standard temperature and pressure (T=0\°C=273.15 K and P=1 atm=101,3 kPa) one mole of real gas (especially in noble gases such as Argon) will behave like an ideal gas and the constant R will be 8.3144598 \frac{Pa. m^{3}}{mol. K}.

However, in this case we are not working with standard temperature and pressure, therefore, even if we are working with Argon, the value of R will be far from the constant of the ideal gases.

Having this clarified, let's isolate R from (1):

R=\frac{PV}{nT}  (2)

Where:

P=259392 Pa

n=1 mole

T=200\°C=473.15 K is the absolute temperature of the gas in Kelvin.

V=8.8 dm^{3}=0.0088 m^{3}

R=\frac{(259392 Pa)(0.0088 m^{3})}{(1 mole)(473.15 K)}  (3)

Finally:

R=4.82436 \frac{Pa. m^{3}}{mol. K}  

4 0
3 years ago
Which of the following lists describes characteristics of a base? (3 points) Bitter taste, high pH, and caustic Bitter taste, lo
garik1379 [7]

Bitter taste, high pH, and caustic Bitter are the characteristics of base.

<h3>What are the characteristics of base?</h3>

Bases have bitter taste, soapy feel, turn red litmus paper blue. Bases are substances that contain metal oxides or hydroxides. Its pH is higher than 7 up to 14.

So we can conclude that bitter taste, high pH, and caustic Bitter are the characteristics of base.

Learn more about base here: brainly.com/question/3948796

8 0
2 years ago
Read 2 more answers
Write the chemical equation for this reaction. Use the picture I provide!
Lesechka [4]

Answer:

H2O

H2O

Explanation:

because the are only two hydrogen that can react to Oxygen

3 0
2 years ago
Entropy means that _________.A. the quantity of usable energy declines with each transformationB. energy can be neither created
son4ous [18]

Answer:

answer A

Explanation:

A) the quantity of usable energy declines with each transformation → True . Since the entropy increases , the amount of energy that can not be converted to useful energy increases and since the total amount of energy is conserved, the quantity of useful energy decreases.

B) energy can be neither created nor destroyed → False in the context of entropy , since the energy is conserved regardless of the changes in entropy (First law → conservation of energy vs second law → increase of entropy)

C)  life should be impossible → False . Since the second law states that the entropy of the <u>universe </u>increases with time . Then the system (life) can experience a decrease in entropy  at the expense of a larger increase in entropy of the surroundings ( so the net increase is positive)

D) it is not possible to observe an increase in molecular organisation → False . Same as C. A system  can experience a decrease in entropy at the expense of a larger increase in entropy of the surroundings ( so the net increase is positive)

7 0
3 years ago
Convert 1.50μm2 to square meters
IrinaVladis [17]
1 micro meter = 10^{-6}  meters
1 μm ^2 = 1 μm*1μm = 10^{-6} *10^{-6} =  10^{-12} meters

1.5 μm^2 = 1.5 * 10^{-12} meters

μm^2 is a unit for surface. First you want to convert μm to meters which is unit for length and if you multiply units for length you get unit for surface.
4 0
2 years ago
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