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jasenka [17]
3 years ago
12

16 POINTS!

Chemistry
2 answers:
scoray [572]3 years ago
7 0
Descriptive Investigations- involve describing and/or qualifying parts of a natural system.
Comparative Investigations-involve collecting data from different populations/organisms under different conditions (so basically a comparison between the two).
Experimental Investigations- involving experiments to test the data hypothesized.

The PDF that I am sharing will help you understand more about these types of investigations.
Download pdf
posledela3 years ago
4 0
Descriptive is when something has a very detailed description usually containing ambitious vocabulary

Comparative is a similar to that of a simile. You can also be comparative when you are personifying things. You are comparing the inatimate object to a human

Experimental is when you try to use different and a variety of methods when writing, you would be broad with your choices and go with a different genre, theme or setting
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1 If 5.80 L of gas is collected at a pressure of 92.0 kPa, what volume will the same gas occupy at 101.3 kPa if the temperature
Anni [7]

Answer:

The volume that the same gas will occupy at 101.3 kPa if the temperature is kept constant is 5.27 L.

Explanation:

As the volume increases, the particles (atoms or molecules) of the gas take longer to reach the walls of the container and therefore collide with them less times per unit of time. This means that the pressure will be lower because it represents the frequency of collisions of the gas against the walls. In this way pressure and volume are related, determining Boyle's law that says:

"The volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure"

Boyle's law is expressed mathematically as:

P * V = k

Now it is possible to assume that you have a certain volume of gas V1 that is at a pressure P1 at the beginning of the experiment. If you vary the volume of gas to a new value V2, then the pressure will change to P2, and it will be fulfilled:

P1 * V1 = P2 * V2

In this case, you have:

  • P1= 92 kPa
  • V1= 5.80 L
  • P2= 101.3 kPa
  • V2= ?

Replacing:

92 kPa* 5.80 L= 101.3 kPa* V2

and solving, you get:

V2=\frac{92 kPa* 5.80 L}{101.3 kPa}

V2= 5.27 L

<u><em>The volume that the same gas will occupy at 101.3 kPa if the temperature is kept constant is 5.27 L.</em></u>

4 0
3 years ago
Organize the following elements in order of increasing atomic radius (Ge, He, Sr, O, Ba)
Katen [24]

Answer:

He

O

Ge

Sr

Ba

Explanation:

An atom gets larger as the number of electronic shells increase; therefore the radius of atoms increases as you go down a certain group in the periodic table of elements.

In general, the size of an atom will decrease as you move from left to the right of a certain period.

8 0
3 years ago
The reaction N O space plus thin space O subscript 3 space rightwards arrow space N O subscript 2 space plus thin space O subscr
nikklg [1K]

Answer:

4.3 × 10⁻⁵ M s⁻¹

Explanation:

Step 1: Given data

  • Rate constant (k):  2.20 × 10⁷ M⁻¹s⁻¹
  • Concentration of NO ([NO]): 3.3 × 10⁻⁶ M
  • Concentration of O₃ ([O₃]): 5.9 × 10⁻⁷ M
  • First order with respect to both NO and O₃

Step 2: Write the balanced reaction

NO + O₃ ⇒ NO₂ + O₂

Step 3: Calculate the reaction rate

The rate law is:

rate = k × [NO] × [O₃]

rate = 2.20 × 10⁷ M⁻¹s⁻¹ × 3.3 × 10⁻⁶ M × 5.9 × 10⁻⁷ M

rate = 4.3 × 10⁻⁵ M s⁻¹

6 0
4 years ago
How does the structure of ionic bonds affect the structure of ionic compounds
ladessa [460]
The structure of Ionic bonds affects the structure of ionic compounds in many ways including Melting point, boiling point, form in room temp, stress of molecules and many other things.
7 0
4 years ago
As you move from left to right across the periodic table, electronegativity
svet-max [94.6K]

Answer:

Electronegativity increases as you move across the periodic table from left to right.

Explanation:

5 0
3 years ago
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