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valentina_108 [34]
4 years ago
8

Every helicopters can fly and if doesn't have wings. What is the counter example?

Chemistry
1 answer:
Monica [59]4 years ago
5 0
You need to create as much possible lifting force to an airplane as you can. In order to do this, you need large gusts/ streams of air and room under the airplane for flight. ;)
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Question 4 to make a 0.500 m solution, one could take 0.500 moles of solute and add 1.00 l of solvent. enough solvent to make 1.
stealth61 [152]
The answer is enough solvent to make 1.00 L of solution. Since molarity is the number of moles of solute in one liter of solution, adding 0.500 mole solute to one liter solvent might not result to a solution with one liter total volume. Less than one liter solvent is first added to dissolve 0.500 mole solute and then the solution is carefully filled with more solvent until the solution reaches to one liter total volume. Hence, the resulting solution is a 0.500M concentration.
7 0
3 years ago
Read 2 more answers
The mass of ethylene glycol (molar mass 62.1 g / mol), the main component of the antifreeze, must be added to 10.0 L of water to
gizmo_the_mogwai [7]

\huge\tt{SOLUTION:}

━┈─────────────────────┈━

<h3>First we find out the freezing point:</h3>

→(-23.0)-(0.0_

→-23.0 degrees C

<h3>Calculate target Colligative Molarity:</h3>

→ -23=1.86 * Cm

→ 12.37= Cm.

→i* molality

→i= 1

→12.37= 1*m

→12.37= m

<h3>molality= moles of solute(C2H6O2)/kg of solvent water</h3>

12.37m= moles C2H6O2/ 10.0kg water

123.7= moles of C2H6O2

123.7moles C2H6O2 * 62.26g C2H6O2

<h2>= 7701.56 g of C2H6O2</h2>

━┈─────────────────────┈━

#CarryOnLearning

#HopeItsHelp

“Work smarter not harder”

3 0
2 years ago
Pls answerrrrrrrrrrrrrrrrrrrrrrrrrrrrr​
Tom [10]

Answer:

Explanation:

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5 0
4 years ago
What is the formula of Iron oxide​
Fed [463]
Fe2O3
That’s the formula for iron oxide
8 0
3 years ago
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Match the following items. Match the items in the left column to the items in the right column. 1. general or nonspecific observ
ivann1987 [24]
when column B is like the attached pic: (missing in your question)

so the matches will be like that:

1- Qualitative :

as Qualitative is a general or nonspecific observation, they also don't require

measurements and even can't be measured, that is because of the reality is

being approximated only. It  describes qualities and uses opinion

2- Hypothesis : 

as a hypothesis is an educated guess quantitative, and it is a prediction stated

in " If and then " form. a hypothesis to be valid need a research such as:

-Encyclopedia & state and local research facilities & scientific journals.

3- Direct relationship:

as a Direct relationship is when two variable change in the same direction,

and one remaining larger than the other by the same factory.  

- this is a type of a relationship in which there is a change with one variable, and corresponding with the change in the other. and because this corresponding change with the other variable in the same direction so it refers to a positive relationship. 

4- Quantitative:

as Quantitative is a measured observation, It's an information or data based

on quantities obtained. And using numbers, equipment and standard units.

5- Control :

as control is standard, reference data or experiment qualitatively. this is what

you compare your experimental results to. This is for comparing results, it

used as a standard for comparison and use baseline measurements to use in

the comparing.

6- Theory :

 as Theory is a presently accepted explanation of how something happened.

 Scientifically acceptable general principles to explain phenomena. It the

general or abstract principles of the science. for example the  wave theory of

light.

7- Law :

as a law is a statement that explains what something does under the same

conditions. when we take about law in science, it is a general rule to explain

the observations in the form of a mathematical statement. Scientific law may 

be stated in words or expressed as a mathematical equations.

8- Best fit curve:

as best fit curve is a curve drawn to average the data's deviations direct

relationship. It is a process of constructing a curve that has best fit to a

series of data points. 

7 0
3 years ago
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