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3 years ago

An unknown element is a mixture of

Chemistry

1 answer:

seropon [69]3 years ago

8 0

Answer:

10.13086%

Explanation:

129y + 132(1-y) = 129.91

129y + 132 - 132y = 129.91

-3y = -2.09

y = 0.69666 (5 s.f.)

% abundance of 132X = 100% - (129×0.69666)%

= 100% - 89.86914%

= 10.13086%

= 10.1% (3 significant figures)

*y is just a variable for the equation

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Answer:

There are 10 types

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Tasya [4]

<h3>Answer:</h3>

13 g CO₂

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

<u>Chemistry</u>

<u>Atomic Structure</u>

Reading a Periodic Table
Moles
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<u>Stoichiometry</u>

Using Dimensional Analysis

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

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<u>Step 1: Define</u>

<em>Identify variables</em>

[Given] 6.7 L O₂

[Solve] g O₂

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

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<u>Step 3: Convert</u>

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

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