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3 years ago

Why was the constitution made? who wrote it and what compromises did people clime to???

1 answer:

4 0

It was signed on September 17, 1787, by delegates to the Constitutional Convention in Philadelphia, presided over by George Washington.The U.S. Constitution established America's national government and fundamental laws, and guaranteed certain basic rights for its citizens

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How many atoms are present in a sample of Potassium (K) weighing 33.49g?

madam [21]

Answer:

5.158 × 10²³ atoms K

General Formulas and Concepts:

Chemistry - Atomic Structure

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

Explanation:

Step 1: Define

33.49 g K

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of K - 39.10 g/mol

Step 3: Convert

$33.49 \ g \ K(\frac{1 \ mol \ K}{39.10 \ g \ K} )(\frac{6.022 \cdot 10^{23} \ atoms \ K}{1 \ mol \ K} )$ = 5.15797 × 10²³ atoms K

Step 4: Check

We are given 4 sig figs. Follow sig figs and round.

5.15797 × 10²³ atoms K ≈ 5.158 × 10²³ atoms K

3 0

3 years ago

What is the density of ice at -10°C?

Alisiya [41]

Answer:

3.98 C my friend you welcome

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3 years ago

Please help! It would be amazing if you can!!

Anastaziya [24]

Answer:

3) Warm Temperatures and High pressures

Explanation:

This is the typical characteristic of southern air masses moving north

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3 years ago

Which of the following could have the formula XY₂?

Savatey [412]

Answer: B

Explanation:

There is an atom of one type of element and then two atoms of another type of element.

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2 years ago

What is the molarity of 3.0 L solution containing 250 g of Nal

IgorC [24]

Answer: C. 0.57 M

Explanation:

Molarity= Moles/Vol

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3 years ago