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2 years ago

In one to two sentences, identify the type of model shown and describe the atomic sructure of a molecule of water.

1 answer:

6 0

The model shown is a ball and stick model of a water molecule showing atomic structure of a water molecule consisting of two atoms of hydrogen bonded to an oxygen atom.

<h3>What are models?</h3>

Models are representations in the form of diagrams, pictures, or illustration of concepts, ideas, or structures of other objects.

In science, models are used to represent molecules and atoms of substances.

Some common models used in chemistry to represent the molecules of substances are:

ball and stick model
space-filling models

The model shown is a ball and stick model of a water molecule.

The atomic structure of a water molecule consists of two atoms of hydrogen bonded to an oxygen atom.

In conclusion, models are used to represent the structure of other substances or concepts.

Learn more about ball and stick model at: brainly.com/question/4300427

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<h2>Answer: 125.41 mL</h2>

Explanation:

Volume = mass ÷ density

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= 125.41 mL

<h3>A 116 g of sunflower oil of 0.925 g/mL has a volume of 125.41 mL.</h3>

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Answer:

Option E, Half life = $2.96\times 10^3\ s$

Explanation:

For a first order reaction, rate constant and half-life is related as:

$t_{1/2}=\frac{0.693}{k}$

Where,

$t_{1/2}$ = Half life

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Rate constant given = $2.34\times 10^{-4}\ s^{-1}$

$t_{1/2}=\frac{0.693}{k}$

$=\frac{0.693}{2.34 \times 10^{-4}}=2.96\times 10^3\ s$

So, the correct option is option E.

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Answer:

Mn (s) + NiCl2 (aq) → MnCl2 (aq) + Ni

Explanation:

The order of displacement of metals from aqueous solution by another metal is defined by the activity series of metals.

The activity series arranges metals in order of reactivity and increasing electrode potentials. The less negative the electrode potential of a metal is, the less reactive it is and the lower it is found in the activity series.

Nickel has a less negative electrode potential than manganese hence it is displaced from an aqueous solution of its salt by manganese spontaneously.

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Answer:

8.68 moles of BaI₂

Explanation:

Given data:

Number of moles of BaI₂ = ?

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Solution:

By using Avogadro number,

1 mole of any substance contain 6.022× 10²³ formula units.

5.23× 10²⁴ formula units of BaI₂ × 1 mol / 6.022× 10²³ formula units

0.868 × 10¹ moles of BaI₂

8.68 moles of BaI₂

Thus, 5.23× 10²⁴ formula units of BaI₂ contain 8.68 moles of BaI₂

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