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AlladinOne [14]
3 years ago
8

Riley is doing an experiment working with friction. He wants to find two ways to modify an object that could increase or decreas

e the same type of friction.
Which methods could he use to perform his experiment?
Chemistry
2 answers:
Shtirlitz [24]3 years ago
5 0
Riley can either change the surface area of the object or can change the slipperiness of the material.
valentina_108 [34]3 years ago
5 0

Answer:the answer is B increasing the surface area and areodynamic design. Just took the test .

Explanation:

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The melting points for the compounds li2s, rb2s, and k2s are 900°c, 530°c, and 840°c, respectively. list these three compounds i
Mila [183]

Answer: The order of increasing lattice energy is Li_2S>K_2S>Rb_2S

Explanation: Lattice energy is defined as the energy required to break the intermolecular force that is responsible for the formation of a lattice.

Melting point is defined as the temperature at which solid gets converted into liquid due to the weakening of the bonds in the solid form.

  • Relation between lattice energy and Melting point:

The relationship between these two is direct.

\text{Lattice energy}\propto \text{Melting point}

More the melting point of a compound, more will be its lattice energy.

Order of increasing Lattice energy will be:

Li_2S>K_2S>Rb_2S

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3 years ago
Why do elements in group 8A (the noble gases) tend not to gain or lose electrons?
Neko [114]

Answer:

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3 years ago
Anthony made a pitfall trap by burying a small glass in the ground so that the top of the glass was exactly level with the groun
torisob [31]

Answer:

Spiders and ground beetles.

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4 0
3 years ago
The Bessemer process created strong, lightweight called _________.
blondinia [14]
The correct answer that would best complete the given statement above would be the term STEEL. The Bessemer process created strong, lightweight called steel. <span>The Bessemer process is the first process of making or mass producing steel. Hope this is the answer that you are looking for. Thanks for posting!</span>
4 0
3 years ago
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A 35 L tank of oxygen is at 315 K with an internal pressure of 190 atmospheres. How
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Answer:

600.7 moles

Explanation:

Applying,

PV = nRT................... Equation 1

Where P = Pressure of oxygen, V = Volume of oxygen, n = number of moles, R = molar gas constant, T = Temperature.

make n the subject of the equation

n = PV/RT............... Equation 2

From the question,

Given: P = 190 atm, V = 35 L, T = 135 K

Constant: R = 0.082 atm.dm³/K.mol

Substitute these values into equation 2

n = (190×35)/(135×0.082)

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3 years ago
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