The balanced equation for the reaction is as follows;
Li₂O + H₂O ---> 2LiOH
Stoichiometry of Li₂O to H₂O is 1:1
Mass of Li₂O reacted - 18.9 g
Number of Li₂O moles reacted - 18.9 g / 30 g/mol = 0.63 mol
An equivalent amount of moles of water have reacted - 0.63 mol
mass of water required - 0.63 mol x 18 g/mol = 11.34 g
A mass of 11.34 g of water is required
By there pH . a pH below 7 is acidic . Above 7 is basic. If it’s right at 7 it’s neutral.
True, a lunar eclipse occurs when the Moon is between the Sun and Earth
Assuming the question is asking for percent composition by mass,
The molar mass of sodium bicarbonate is:
22.990 + 1.008 + 12.011 + 3*15.999 = 84.006 g/mol
The molar mass of 3 oxygen atoms is:
3*15.999 = 47.997 g/mol
The percentage composition by mass is:
47.997/84.006 * 100% = 57.1% (3 s.f.)
I will mark brainlist please help
1) what is the subject of a sentence?
• the verb
• tells who or what the sentence is about
• the action in the sentence
2) What is the predicate of a sentence?
• who the sentence is about?
• tells what the subject is or does
3) What is the PREDICATE in this sentence.
- Mrs. Shaffer is crazy
• Mrs. Shaffer
• is
• is crazy
• Shaffer is crazy
4) what is the predicate of this sentence.
- Friday is the best day of the week
• Friday
• is the best day of the week
5) What is the subject of this sentence?
- The turtle is swimming in the ocean
• the turtle
• is swimming in the ocean
6) What is the the complete predicate of this sentence?
- The class studied whales.
• class
• the class
• whales
• studied whales
7) What is the predicate in the sentence
- She drank her whole glass of milk
• she
• milk
• drank her whole glass of milk
• drank milk
8) what is the subject in the sentence?
- The music class attended the opera.
• the music class
• attended
• music
9) identify the complete subject.
- Susan and Kay went swimming.
• went swimming
• Susan and Kay
• went
10) identify the COMPLETE predicate
- Tina and her friends went to the movies
• Tina
• her friends
• to the movies
• went to the movies
11) identify the SIMPLE PREDICATE PART.
- Tina and her friends went to the movies
• Tina
• her friends
• went
• the movies
12) identify the circled line in the sentence.
- All of the ((((PLAYERS)))) went to practice
• complete subject
• simple subject
• simple predicate
• complete predicate
