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satela [25.4K]
2 years ago
5

Caleb wants to find out which type of floor material is best for bouncing tennis balls the highest. Which statement best describ

es the process he should use?
He should use technological design because he will need to make materials.
He should use scientific investigation because he will need to do an experiment.
He should use technological design because he will need to conduct background research.
He should use scientific investigation because he will need to design a prototype.
Chemistry
2 answers:
il63 [147K]2 years ago
6 0

He should use scientific investigation because he will need to do an experiment.

goldenfox [79]2 years ago
4 0
Option 2 seems to be the best answer
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Berny has a 0.15-kilogram candle, a 1.00-kilogram jar, and a 0.25 kilogram candle holder. He places the candle and candle holder
Kobotan [32]
It's a because if you add them together you till get 1.40
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2 years ago
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In which 1.0 gram sample are particles arranged in a rystal structure?
lilavasa [31]
The Options are as follow,

<span>                               (1) CaCl</span>₂<span> (s)     (3) CH</span>₃<span>OH (l)</span>

<span>                               (2) C</span>₂<span>H</span>₆<span> (g)      (4) Cal</span>₂<span> (aq)</span>

Answer:

            Option-1 is the correct answer.

Explanation:

                  As we know crystal formation is the property of solids. Therefore, in given options we are given with four different states of matter. 

                  Option A, CaCl₂ is in a solid state , so it can exist in crystal form.

                  Option 2, C₂H₆ (Ethane) is in gas form, so it cannot form crystals.

                  Option 3, CH₃OH (Methanol) is present in liquid form, so it fails to form crystals.

                  Option 4, CaI₂, it is dissolved in water, Hence, it is in aqueous state, Therefore it also lacks crystal structure.

5 0
2 years ago
Which two statements explain how a cell's parts help it get nutrients?
olchik [2.2K]

Answer:

A and i think D

Explanation:

8 0
2 years ago
The ΔG°f of atomic oxygen is 230.1 kJ/mol. Find ΔG° for the following dissociation reactionO2 (g) &lt;--&gt; 2O (g)then calculat
marusya05 [52]

Answer:

Kc = 2.145 × 10⁻⁸¹

Explanation:

Let's consider the following reaction:

O₂(g) ⇄ 2O(g)

The standard Gibbs free energy for the reaction (ΔG°) can be calculated using the following expression:

ΔG° = Σnp. ΔG°f(p) - Σnp. ΔG°f(p)

where,

ni are the moles of products and reactants

ΔG°f(p) are the standard Gibbs free energy of formation of products and reactants

In this case,

ΔG° = 2 × ΔG°f(O) - 1 × ΔG°f(O₂)

ΔG° = 2 × 230.1 kJ/mol - 1 × 0 kJ/mol

ΔG° = 460.2 kJ/mol

With this information, we can calculate the equilibrium constant (Kc) using the following expression:

Kc=e^{-\Delta G \°/R.T } = e^{-460.2 kJ/mol/(8.314 \times 10^{-3}kJ/mol.K)  \times 298K }=2.145 \times 10^{-81}

3 0
2 years ago
Imagine you are given a mystery element. It is, however, a discovered and known element. You may perform a maximum of two observ
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The classification of it being a metal, nonmetal, or metalliod will be useful in the process of elimination to determine what it is. Then for the second test, meauring the atomin radius will narrow it down quicker to the mystery elemet's name.

Since you determined what part of the periodic table it's on, then when measuring the atomic radius, you should be able to pinpoint what the element is more surely.

6 0
2 years ago
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