All categories

1 year ago

The empirical formula of styrene is CH; its molar mass is 104.1 g/mol. What is the molecular formula of styrene

Chemistry

1 answer:

frez [133]1 year ago

7 0

The atomic mass of carbon is 12.011 g/mol.
The atomic mass of hydrogen is 1.00794 g/mol.

This means the molar mass of CH is

$12.011+1.00794=13.01894 \text{ g/mol}$

Dividing the given molar mass by this, $\frac{104.1}{13.01894} \approx 8$

This means the molecular formula is $\boxed{\text{C}_{8}\text{H}_{8}}$

You might be interested in

Which description correctly states the difference between a chemical and a physical property? A) Physical properties can only be

kolezko [41]

Answer:

C) Physical properties can be observed without changing into a new substance, while chemical properties are usually observable during a chemical reaction when a new substance is made.

Explanation:

Physical Change

The changes that occur only due to change in shape or physical properties but their chemical or internal composition remain unchanged.

These changes were reversible.

They have same chemical property.

These changes can be observed with naked eye.

Example :

Water converting to Ice

Water converting to gas

In this water molecule remain the same only they rearrange themselves that change its state of mater not composition

Chemical change:

The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.

These changes are irreversible

These changes occur due to chemical reactions

These may not be observed with naked eye

Example:

Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood

Boiling of egg: that change the chemical composition of protein in the egg .

The reaction of Hydrogen and oxygen:

H 2 (g) + O 2 (g) -------------------------------------> 2H 2O (l)

5 0

3 years ago

For the reaction A (g) → 3 B (g), Kp = 80100 at 298 K. When ∆G = -14.2 kJ/mol, what is the partial pressure of A when the partia

matrenka [14]

Answer:

hey stranger i love you

Explanation:

5 0

3 years ago

How many moles are in 83.1g of CaBr2

9966 [12]

Answer:

0.416 mol CaBr₂

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic Table
Using Dimensional Analysis

Explanation:

Step 1: Define

83.1 g CaBr₂

Step 2: Identify Conversions

Molar Mass of Ca - 40.08 g/mol

Molar mass of Br - 79.90 g/mol

Molar Mass of CaBr₂ - 40.08 + 2(79.90) = 199.88 g/mol

Step 3: Convert

$83.1 \ g \ CaBr_2(\frac{1 \ mol \ CaBr_2}{199.88 \ g \ CaBr_2} )$ = 0.415749 mol CaBr₂

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

0.415749 mol CaBr₂ ≈ 0.416 mol CaBr₂

8 0

2 years ago

Use the drop-down menus to complete each statement.

slavikrds [6]

Question 1: A material that causes a wave to bounce off it is called the. Answer : Reflection

Question 2: A material that takes in a wave when the wave hits is called the. Answer: Absorber

8 0

2 years ago

Giardiasis is an intestinal parasite that can transmitted through person-to-person contact and infested swimming pools. This par

Volgvan

Answer:

I think it would be Contagious.

Explanation:

You get it from another person or from food and thats contagious.

3 0

2 years ago