saabrrinnaaa
12.12.2019 •
Chemistry
Two or more compounds that have the same molecular formula, but different arrangements of their atoms, are isomers.
Solved
Show answers
More tips
- C Computers and Internet How to Learn to Type Fast?...
- F Food and Cooking Delight for Gourmets: How to Prepare Liver Pate...
- S Style and Beauty How to braid friendship bracelets?...
- H Health and Medicine Mercury Thermometer Danger: What to do when a thermometer breaks?...
- F Food and Cooking Which Calamari Salad is the Most Delicious?...
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- F Food and Cooking The Most Delicious and Simple Fish in Batter Recipe...
- H Health and Medicine What is Autism? Understanding the Basics of This Neurodevelopmental Disorder...
- P Philosophy How to Develop Extrasensory Abilities?...
- S Style and Beauty Don t Sacrifice Your Brows: How to Properly Pluck Stubborn Hairs...
Ответ:
Ответ:
8. 13.3g of Oxygen is reacted with 10.0g of Magnesium
9. 49.6g of Ammonia (NH₃) reacts with 106.5g of HCl
The law of conservation of mass is observed in the reaction
Explanation:
8. The Relative Atomic Masses of the elements involved are:
Mg=24, O=16
The equation for the reaction is given as
2Mg(s) + O₂(g) → 2MgO(s)
From the equation above
Let's assume that the amount in gram of Oxygen required to react with 10.0g of Mg is x
2(24)g of Magnesium is required to react with (16 x 2)g of Oxygen
10.0g of Magnesium should react with x g of Oxygen
∴ x = (10.0 x (16 x 2))/2(24) = (10.0 x 32)/48 = 13.3g of Oxygen
9. The Relative Atomic Masses of the elements involved in the reaction are
H=1, Cl=35.5, N=14
The equation for the reaction is given as
HCl(g) + NH₃(g) → NH₄Cl(s)
From the equation above
Let's say y equals the amount in grams of Ammonia involved in the reaction
(1 + 35.5)g of HCl reacts with (14+(1 x 3))g of Ammonia
106g of HCl should react with y g of Ammonia
∴ y = (106 x (14 + (1 x 3)))/(1+35.5) = (106 x 17)/36.5 = 49.6g of Ammonia
The law of conservation of mass states that the total mass in a closed system (reaction) remains constant over time (i.e mass is neither gained or lost). In other words, the total mass of the reactant equals the total mass of the product.
Based on the reaction above, the total mass of the reactant (i.e HCl and NH₃) is 53.5g which is the same as the product (i.e NH₄Cl) which is also 53.5g.