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3 years ago

The force that one surface exerts on another when the 2 rub against each other is called

Chemistry

2 answers:

Sav [38]3 years ago

5 0

The friction force
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harkovskaia [24]3 years ago

3 0

friction

it should be friction... if not my bad

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Which element is more likely to dissociate into its monatomic form at 3000 K. H or N. Why?

Oliga [24]

Answer:

Explanation:

In the first place it is necessary to consider that these two elements will be their diatomic form initially, that is, H2 and N2.

first we should check the equilibrium constant Kp tables in this case at a temperature of 3000K

Value for dissociation reaction of H2 in Kp = -3.685

Value for dissociation reaction of N2 in Kp = -22.359

Equilibrium constant for H2 dissociation is higher than N2 dissociation. so for this comparation H2 is more likely to dissociate.

8 0

3 years ago

Consider the following generic chemical equation: 2W + 3X → 3Y + Z When 5 units of W and 6 units of X are allowed to react, the

aliina [53]

Answer:

The answer to your question is letter b) X

Explanation:

Data

W = 5 units

X = 6 units

Chemical reaction

2W + 3X ⇒ 3Y + Z

To determine which reactant is the limiting reactant, we must use proportions:

-Theoretical proportion W / X = 2 / 3 = 0.67

- Experimental proportion W / X = 5 / 6 = 0.83

As the experimental proportion is higher than the theoretical proportion, we conclude that the amount of W is higher in the experiment so the limiting reactant is X.

8 0

3 years ago

If you were asked to convert 4.2 x 1022 atoms of aluminum to moles, which of the following should you use for the conversion?

Mashcka [7]

You would divide the number of atoms by Avogadro's number [6.02x10^23]

4 0

4 years ago

How many moles would you need to have 7.85 x 10^22 molecules of ammonia (NH3).

RSB [31]

<h3>Answer:</h3>

0.130 moles NH₃

<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>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>

[Given] 7.85 × 10²² molecules NH₃

[Solve] moles NH₃

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

Avogadro's Number

<u>Step 3: Convert</u>

[DA] Set up: $\displaystyle 7.85 \cdot 10^{22} \ molecules \ NH_3(\frac{1 \ mol \ NH_3}{6.022 \cdot 10^{23} \ molecules \ NH_3})$
[DA] Multiply/Divide [Cancel out units]: $\displaystyle 0.130355 \ moles \ NH_3$

<u>Step 4: Check</u>

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

0.130355 moles NH₃ ≈ 0.130 moles NH₃

3 0

3 years ago

A packet of light energy is called a

larisa86 [58]

Packets of light energy are called photons.

7 0

3 years ago

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