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2 years ago

Determine if the following is a compound , Element or Mixture

1 answer:

8 0

Compound is a group of same molecules, Element is a group of same atoms and mixture is combination of two or more pure substances.

What are Molecules ?

Molecules are the combination of two or more different atoms combine in a fixed ratio.

Molecules can be independently founded.

Atoms are always founded in combined state and does not occurs independently except rare earth elements which belongs to 18th group of periodic table.

Chemicals are taken in compound state But they undergo chemical reaction individually in molecular level.

Hence, Compound is a group of same molecules, Element is a group of same atoms and mixture is combination of two or more pure substances.

Learn more compound here ;

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How many moles of glucose does 1.2 x 10^24 molecules represent

sammy [17]

<h3>Answer:</h3>

2.0 mol C₆H₁₂O₆

<h3>General Formulas and Concepts:</h3>

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Chemistry

Atomic Structure

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Using Dimensional Analysis

<h3>Explanation:</h3>

Step 1: Define

1.2 × 10²⁴ molecules C₆H₁₂O₆ (glucose)

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Set up: $\displaystyle 1.2 \cdot 10^{24} \ molecules \ C_6H_{12}O_6(\frac{1 \ mol \ C_6H_{12}O_6}{6.022 \cdot 10^{23} \ molecules \ C_6H_{12}O_6})$
Divide: $\displaystyle 1.99269 \ mol \ C_6H_{12}O_6$

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

1.99269 mol C₆H₁₂O₆ ≈ 2.0 mol C₆H₁₂O₆

3 0

4 years ago

The solubility of CaF2 is 0.00021 mole per liter. What is the solubility product constant for CaF2? A) 7.3 x 10-12 B) 3.7 x 10-1

Naddika [18.5K]

Answer:

B) Ksp = 3.7 E-11

Explanation:

CaF2 ↔ Ca2+ + 2F-

S S 2S,,,,,,,,,,,,,,,in the equilibrium

⇒ Ksp = [ Ca2+ ] * [ F- ]²

⇒ Ksp = S * ( 2S )²

⇒ Ksp = 4S³

⇒ Ksp = 4 * ( 0.00021 )³

⇒ Ksp = 4 * 9.261 E-12

⇒ Ksp = 3.704 E-11

3 0

3 years ago

Write and label the density triangle

Slav-nsk [51]

Answer:

It is basically a way of telling you how to solve for different variables in the equation d=m/v

Explanation:

8 0

3 years ago

What is the kinetic energy of a bicycle with a mass of 11 kg traveling 8 m/s?

erastovalidia [21]

<h2>Question:-</h2>

What is the kinetic energy of a bicycle with a mass of 11 kg traveling 8 m/s ?

<h2>Answer:-</h2>

Mass (m) of a bicycle is = 11 kg

Speed (v) of a bicycle is = 8 m/s

Kinetic energy (K.E) of a bicycle is = ?

Since, we know,

<h3> ${ \boxed{\rm \red {K.E \: = \frac{1}{2} mv²}}}$ </h3>

$\bf K.E \: = \frac{1}{2} \: × \: 11 \: kg \: × \: (8 \: m/s)²$

$\bf K.E \: = \frac{1}{2} \: × \: 11 \: kg \: × \: 64 \: m²/s²$

$\bf K.E \: = \frac{704}{2} \: kg \: m²/s²$

$\bf K.E \: = \: 352 \: kg \: m²/s²$

<h3>The kinetic energy (K.E) of a bicycle is 352 kg m²/s². [Answer]</h3>

5 0

3 years ago

What is the atomic number of an atom ?

lorasvet [3.4K]

Answer:

Atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is also the atomic number.

Explanation:

4 0

3 years ago