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2 years ago

PLEASE ANSWER ASAP ITS TIMED

Chemistry

1 answer:

Andrews [41]2 years ago

3 0

The mole ratio Aluminium to Aluminum Oxide is 2 : 1

<h3>Further explanation</h3>

Given

Reaction

2Al + Fe ----> Al2O3 +2Fe

Required

The mol ratio

Solution

If we look at the reaction above, there is an element missing from the reactant i.e oxygen, because the number of atoms and elements involved in the reaction should be the same between the reactants and products.

So the possible and balanced reactions are:

From this reaction the ratio of Al: Al₂O₃ can be determined, which is 2: 1

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The children’s playful acts made their parents roar with laughter

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B.human beings B is correct

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3 years ago

water interacts with polar substances like –oh groups but not with non-polar substances like methyl (−ch3) or ethyl groups (−ch2

Brilliant_brown [7]

CH3OH and CH3CH2CH2OH will easily dissolve in water based on polarity not on size.

<h3>What is Polarity ?</h3>

In chemistry, polarity describes the type of bonds that exist between atoms. Atoms share electrons when they join forces to form chemical bonds. When one of the atoms applies a stronger attractive force to the bond's electrons, a polar molecule is created.

For instance, the chlorine atom is slightly negatively charged while the hydrogen atom in hydrogen chloride is slightly positively charged.

Water is polar due to its form even though its molecules have no net charge. The molecule's hydrogen ends are positive, and its oxygen ends are negative. Water molecules are drawn to other polar molecules and to one another as a result.

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7 0

1 year ago

How many moles of tin, Sn, are in 2500 atoms of tin?

mario62 [17]

<h3>Answer:</h3>

4.2 × 10⁻²¹ moles Sn

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

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

<u>Chemistry</u>

<u>Atomic Structure</u>

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

<h3>Explanation:</h3>

<u>Step 1: Define</u>

2500 atoms Sn

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

Set up: $\displaystyle 2500 \ atoms \ Sn (\frac{1 \ mol \ Sn}{6.022 \cdot 10^{23} \ atoms \ Sn})$
Multiply: $\displaystyle 4.15144 \cdot 10^{-21} \ moles \ Sn$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 2 sig figs.</em>

4.15144 × 10⁻²¹ moles Sn ≈ 4.2 × 10⁻²¹ moles Sn

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3 years ago

How many moles are in 500 g of copper

Tanya [424]

The answer to your question is 7.9 moles

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3 years ago

Identify each enthalpy change by name and classify each change as exothermic or endothermic.

Len [333]

We classify them as follows:

1. 1 mol NaCl (s) à 1 mol NaCl(l)
C Molar heat of fusion; endothermic

2. C4H10 O(l) à C4H10O (g)
B Molar heat of vaporization; endothermic

3. H2O(g) à H2O (l)
D Molar heat of condensation; exothermic

4. 1 mol NaCl(s) + 3.88 kJ/molà 1 mol NaCl(aq)
A Molar heat of solution; endothermic

3 0

3 years ago

Read 2 more answers