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My name is Ann [436]
2 years ago
8

An engineer designing a new type of engine needs a liquid that can be heated and cooled quickly with as little exchange of energ

y as possible.
Which property should the engineer primarily look for in the liquid?
OA
low thermal conductivity
OB low specific heat capacity
oc high reactivity
OD high internal energy
OE high density
Chemistry
1 answer:
sdas [7]2 years ago
8 0

Answer:

B. low specific heat capacity

Explanation:

Due to the fact that the engineer should choose the liquids property because that's what he should focus on.

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On the axes provided, label pressure on the horizontal axis from O mb to 760 mb and volume on the vertical axis from O to 1 mL.
Delicious77 [7]

Answer:

  • Please, find the graph with the labels and points located on the axes in the picture attached.

Explanation:

This is how you meet all the instructions and some important comments to understand how this kind of graphs word:

<u>1) Label pressure on the horizontal axis from O mb to 760 mb and volume on the vertical axis from O to 1 mL. </u>

The horizontal axis is used to record the independent variable and the vertical axis is used to record the dependent variable. The axes most be properly labeled with the name of the variable and the units.

In this case the origin is the point (0,0) which means that the axes cross each other, perpendicularly, at a pressure of 0 mb and a volume of 0.0 mililiters.

<u>2) Assign values to axes divisions in such a way that you occupy almost all the space on both axes. </u>

A good graph searches to occupy the whole space on both cases; to do that, find the maximum value for each variable, pressure and volume, and choose the values of the marks.

The range of the pressure (horizontal axis) is [90, 760 mb], so you should choose big divisions (marks) of 100 mb, and assign 800 mb to the right most mark on the horizontal axis. Then, you can divide each interval of 100 mb into 10 spaces, with small divisions of 10 mb (my graph uses 4 spcaes, with small divisions of 25 mb, but I recommend you use small divisions of 10 mb).

The range of the volume (vertical axis) is [0.1, 0.8], so you should choose only divisions with value of 0.1 ml.

<u>3) Now locate and label the points: </u>

  • (90, 0.9) ⇒ 90 mb, 0.9 ml
  • (100, 0.8) ⇒ 100 mb, 0.8 ml
  • (400, 0.2) ⇒ 400 mb, 0.2 ml
  • (600, 0.15) ⇒ 600 mb, 0.15 ml
  • (760, 0.1) ⇒ 760 mb, 0.1 ml

The points of the kind (x, y) are called ordered pairs, which means that the order matters, because it has a meaning: the first number represents the independent variable and the second number represents the dependent variable.

So, in the point (90, 0.9), 90 is a pressure of 90 mb and 0.9 is a volume of 0.9 ml.

To locate (600, 0.15), since the horizontal marks have value of 0.1, you must locate the second coordinate of your point between the marks 0.1 and 0.2 ml.

With that you can now locate each point on your graph.

5 0
2 years ago
Read 2 more answers
An ion has 24 protons and 19 electrons. Write the symbol for this ion.
Lerok [7]

Answer:

+5

Explanation:

it hs 5 more protons thant electrons, so it has a positive charge of 5

5 0
2 years ago
In 1980,the US produced 18.4 billion(10to the power of 9)pounds of phosphoric acid to be used in the manufacture of fertilizer.t
sertanlavr [38]

18.4 * 10^9 lbs = (18.4 * 10^9)/2000 tons  

Cost = ((18.4 * 10^9)/2000 ) * 318  

Cost = $ 2925600000

6 0
2 years ago
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How many moles of PBr3 contain 3.68 x 10^25 bromine atoms?
scoray [572]
<span>3.68 x 10²⁵ bromine atoms * 1mol/6.02*10²³ atoms=
 = 61.13 mol of bromine atoms

1 mol PBr3 ----- 3 mol Br
x mol PBr3 -----61.13 mol Br

x= 1*61.13/3 = 20.4 mol PBr3.


</span>20.4 mol PBr3 <span>contain 3.68 x 10^25 bromine atoms.</span>
7 0
2 years ago
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While looking at xenon (Xe) on the periodic table, a student needs to find an element with a smaller atomic mass in the same gro
zvonat [6]

Answer is: directly up.

Neon (Ne) is noble gas with atomic number 10 and atomic mass around 20.

1) directly up is noble gas helium (He) with atomic mass around 4.

2) directly down is noble gas argon (Ar) with atomic mass around 40.

3) directly to the left is florine (F), with smaller atomic mass, but also from different group.

4) directly to the right there no elements, because noble gases are far right in 18. group of Periodic table.

3 0
2 years ago
Read 2 more answers
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