After 180.0 g of zinc was dropped into a beaker of hydrochloric acid and the reaction ceased, 27.6 g of unreacted zinc remained in the beaker: Zn + HCl → ZnCl2 + H2(b) How many grams of HCl were reacted?
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.
After 180.0 g of zinc was dropped into a beaker of hydrochloric acid and the reaction ceased, 27.6 g of unreacted zinc remained in the beaker:
Zn + HCl → ZnCl2 + H2(b)
How many grams of HCl were reacted?
![**Reaction Calculation Example**
**Reaction Overview:**
After 180.0 g of zinc was added to a beaker of hydrochloric acid, and the reaction ceased, 27.6 g of unreacted zinc remained in the beaker. The chemical reaction is represented as follows:
\[ \text{Zn} + \text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2 \]
**Problem (a): How many grams of hydrogen gas were produced?**
- **Calculation:**
- Correct Result: **4.66 g H₂**
**Problem (b): How many grams of HCl were reacted?**
- **Note:** Incorrect attempt indicated.
- Feedback: "Incorrect. Did you use the balanced reaction to find the mole ratio?"
- **Estimate:**
- Calculation Needed: **85.18 g HCl**
This problem involves calculating the mass of products and reactants in a chemical reaction, using principles of stoichiometry and conservation of mass.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F78cba496-3023-47ba-bbe8-0cc367dc144f%2F33438927-fa59-4771-9c6d-706bd7d976fc%2Fwlc40h_processed.png&w=3840&q=75)
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