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3 years ago

Help me please Answer & exp.

Chemistry

1 answer:

nordsb [41]3 years ago

8 0

Explanation:

Some Rules Regarding Oxidation Numbers:

- Hydrogen has oxidation number of + 1 except in hydrides where it is -1

- Oxygen has oxidation number of -2 except in peroxides where it is -1

- Some elements have fixed oxidation numbers. E.g Halogen group elements has oxidation number of -1

- Oxidation number of a compound is the sum total of the individual elements and a neutral compound has oxidation number of 0.

A. HI

Hydrogen has oxidation of + 1

Oxidation number of I:

1 + x = 0

x = -1

B. PBr3

Br has oxidation number of - 1

Oxidation number of Pb:

x + 3 (-1) = 0

x = + 3

C. KH

Hydrogen has oxidation of + 1

Oxidation number of K:

1 + x = 0

x = -1

D. H3PO4

Hydrogen has oxidation number of + 1

Oxygen has oxidation number of -2

Oxidation number of P:

3(1) + x + 4(-2) = 0

3 + x - 8 =0

x = 5

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katovenus [111]

Answer:

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Explanation:

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3 years ago

Due to the hydrogen bonds between water molecules, when water freezes, it will… Select all that apply

sertanlavr [38]

<span>i think its decrease in density</span>

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4 years ago

9.27 mol of oxygen is equal to______molecules of oxygen <br> Please help I need it

bixtya [17]

<h3>Answer:</h3>

5.58 × 10²⁴ molecules O₂

<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> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Reading a Periodic Table
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

9.27 mol O₂ (Oxygen)

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

Avogadro's Number

<u>Step 3: Convert</u>

Set up: $\displaystyle 9.27 \ mol \ O_2(\frac{6.022 \cdot 10^{23} \ molecules \ O_2}{1 \ mol \ O_2})$
Multiply/Divide: $\displaystyle 5.58239 \cdot 10^{24} \ molecules \ O_2$

<u>Step 4: Check</u>

<em>Follow sig fig rules. We are given 3 sig figs.</em>

5.58239 × 10²⁴ molecules O₂ ≈ 5.58 × 10²⁴ molecules O₂

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3 years ago

student has two balloons, one filled with helium and one filled with argon. Each balloon has a volume of 22.4-L at STP. Which of

slamgirl [31]

The statement that can be made about the samples is that each balloon contains 1 mole of each gas.

<h3>What is molar volume?</h3>

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Hence, if 22.4-L at STP is the volume of both the helium and argon filled balloons, then each balloon contains one mole of the gas.

Learn more about molar volume: brainly.com/question/4172228

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2 years ago

MATCH

almond37 [142]

I wanna say it would be 1 would be A 2 would be C 3 would be D 4 would be B and 5 would be E

hope this helps

6 0

3 years ago

Read 2 more answers