States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
![**Problem Statement:**
How many grams of KOH are present in 34.0 mL of a 7.34 M KOH solution? Round your answer to 3 significant digits.
**Input Section:**
There is a text box labeled with the unit “g” for entering the numerical answer in grams.
**Graphical Interface:**
- A square checkbox with an option labeled as "x10" is present, possibly indicating a multiplier feature for the entered number.
- There are two icons:
- An "X" which likely allows the user to clear their input.
- A refresh or reload symbol, presumably for resetting the input section.
**Instructions for Solving:**
1. Calculate the number of grams of KOH using the formula:
\[
\text{grams of KOH} = \text{volume in Liters} \times \text{molarity (M)} \times \text{molar mass of KOH}
\]
2. The molar mass of KOH (Potassium Hydroxide) is approximately 56.11 g/mol.
3. Convert 34.0 mL to liters: 34.0 mL = 0.0340 L.
4. Multiply the converted volume by the given molarity and molar mass to find the mass in grams.
5. Input the calculated value in the text box, ensuring it is rounded to 3 significant digits.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F84c202e2-51da-453e-8ae2-06a3b9c7648d%2F3086ba4e-3f3c-4fb8-91ac-cba9d8dbdf47%2Fimswl58_processed.png&w=3840&q=75)
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