3 years ago

A box is pushed down at an angle of 32 degrees on a rough surface. The box moves to the right.

Chemistry

1 answer:

Reptile [31]3 years ago

4 0

Answer:

Explanation:

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C . Kinetic Molecular Theory

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3 years ago

Which of the following elements does not form hydride by direct heating with

ozzi

I believe the answer is A.

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During the daytime, wind blows off of the __________________ because that material takes ___________ time to get warm, creating

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How many atoms are in a 1.8 mol sample of Magnesium (Mg)?

Gnom [1K]

Answer:

1.1 × 10²⁴ atoms Mg

General Formulas and Concepts:

Atomic Structure

Moles
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Using Dimensional Analysis

Explanation:

Step 1: Define

Identify

[Given] 1.8 mol Mg

[Solve] atoms Mg

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[DA] Set up: $\displaystyle 1.8 \ mol \ Mg(\frac{6.022 \cdot 10^{23} \ atoms \ Mg}{1 \ mol \ Mg})$
[DA] Multiply [Cancel out units]: $\displaystyle 1.08396 \cdot 10^{24} \ atoms \ Mg$

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

1.08396 × 10²⁴ atoms Mg ≈ 1.1 × 10²⁴ atoms Mg

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How many atoms of hydrogen (h) are present in 200 molecules of ammonia (nh3)? express your answer numerically?

natita [175]

Chemical formula of ammonia = NH3 As we can see there are three atoms of hydrogen in one molecule of ammonia. So in the 200 molecule of ammonia there will be = 200*3 = 600 atoms of hydrogen. Answer - 600 atoms of hydrogen.

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3 years ago