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3 years ago

Calculate the mass in grams of 202 atoms of iron

Chemistry

1 answer:

Sergeeva-Olga [200]3 years ago

4 0

Answer:

To calculate the number of atoms in a sample, divide its weight in grams by the amu atomic mass from the periodic table, then multiply the result by Avogadro's number: 6.02 x 10^23. Set up Equation Express the relationship of the three pieces of information you need to calculate the number of atoms in the sample in the form of an equation.

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Which statement BEST describes the policies of the Freedmen's Bureau? Question 1 options: The Freedmen's Bureau wanted to encour

olga2289 [7]

<h2>ANSWER:</h2>

The Freedman's Bureau wanted to help newly freed slaves participate in American society.

<h2>EXPLANATION:</h2>

The Freedmen's Bureau, formally known as the Bureau of Refugees, Freedmen and Abandoned Lands, was set up in 1865 by Congress to help a large number of previous dark slaves and poor whites in the South in the outcome of the Civil War. The Freedmen's Bureau given nourishment, lodging, and therapeutic guide built up schools and offered lawful help. It additionally endeavored to settle previous slaves ashore appropriated or surrendered amid the war. Be that as it may, the department was kept from completely doing its projects because of a lack of assets and faculty, alongside the legislative issues of race and Reconstruction.

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3 years ago

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The _______ is the total number of organisms that an ecosystem can support.

ale4655 [162]

B. Carrying capacity

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3 years ago

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Chemists recognize many different elements, such as gold, or oxygen, or carbon, or iron. suppose you got some iron, and started

Leni [432]

The answer is atom i hope it helps

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3 years ago

How many moles in 2.21 x10E24 atoms of aluminum

lisov135 [29]

<h3>Answer:</h3>

3.67 mol Al

<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>

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>

2.21 × 10²⁴ atoms Al

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

Avogadro's Number

<u>Step 3: Convert</u>

Set up: $\displaystyle 2.21 \cdot 10^{24} \ atoms \ Al(\frac{1 \ mol \ Al}{6.022 \cdot 10^{23} \ atoms \ Al})$
Divide: $\displaystyle 3.66988 \ mol \ Al$

<u>Step 4: Check</u>

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

3.66988 mol Al ≈ 3.67 mol Al

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3 years ago

How many moles of H3PO4 are there in 658 grams of H3PO4?

solmaris [256]

<span>97.995181 would be the correct answer</span>

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3 years ago

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