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2 years ago

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Chemistry

1 answer:

miskamm [114]2 years ago

8 0

The correct answer is option B or number two electrons are consumers

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Attractive forces of liquids allow for _____.

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They allow particles to stay close together.

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When turgor pressure is high enough in a cell, the cell walls become _____

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List the 4 questions to answer when you find the charge of an ion

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2 years ago

The atomic number of manganese (Mn) is 25. What's the electron configuration for manganese?

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$\boxed{\sf D. \ [Ar] \ 3d5 \ 4s2}$

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A pure titanium cube has an edge length of 2.84 in how many titanium atoms does it contain? titanium has a density of 4.50g/cm3.

rjkz [21]

There are $2.12 \times 10^{25}$ titantium atoms in the cube.

<h3>Further Explanation</h3>

This problem involves unit conversion and mole conversion. The steps are:

Convert the length of the cube from inches to centimeter since the density is given in g/cm³.
Determine the mass of the cube using the given density.
Convert the mass of the cube to number of atoms using Avogadro's number.

<u>STEP 1. </u>Converting inches to cm

$length \ in \ cm \ = 2.84 \ in \times (\frac{2.54 \ cm}{1 \ in})\\\boxed {length \ in \ cm \ = 7.2136 \ cm}$

<u>STEP 2:</u> Determining mass of cube from the density

$density = \frac{mass}{volume}\\mass = density \times \ volume\\\\mass \ = 4.50 \frac{g}{cm^3} \times (7.2136 \ cm)^3\\\boxed {mass \ = 1689.15 \ g}$

<u>STEP 3:</u> Converting mass of titanium cube to number of atoms

$no. \ of \ Ti \ atoms = 1689.15 \ g \ Ti \times (\frac{1 \ mol \ Ti}{47.867 \ g})(\frac{6.022 \times 10^{23} \ Ti \ atoms}{1 \ mol \ Ti}) \\\\\boxed {no. \ of \ Ti \ atoms = 2.125 \times 10^{25} \ atoms}$

Since the given values have 3 significant figures, the final answer must be:

$\boxed {\boxed {no. \ of \ atoms \ = 2.12 \times 10^{25} \ Ti \ atoms}}$

<h3>Learn More</h3>

Mole Conversions brainly.com/question/12980009
Stoichiometry brainly.com/question/10513747
Dimensional Analysis brainly.com/question/1594497

Keywords: Avogadro's number

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