Answer:
The perimeter of a Rectangle P= 2(l + b)
Area of a Rectangle A = l × b
The answer is B, the number of protons
It's is the unique thing about every element!
The given question is incomplete. The complete question is as follows.
A solution contains an unknown mass of dissolved barium ions. When sodium sulfate is added to the solution, a white precipitate forms. The precipitate is filtered and dried and then found to have a mass of 212 mg. What mass of barium was in the original solution? (Assume that all of the barium was precipitated out of solution by the reaction.)
Explanation:
When 
and 
are added then white precipitate forms. And, reaction equation for this is as follows.
It is given that mass (m) is 212 mg or 0.212 g (as 1 g = 1000 mg). Molecular weight of 
is 233.43.
Now, we will calculate the number of moles as follows.
No. of moles = mass × M.W
= 
= 0.00091 mol of
Hence, it means that 0.00091 mol of . Now, we will calculate the mass as follows.
Mass = moles × MW
= 
= 0.124 grams or 124 mg of barium
Thus, we can conclude that mass of barium into the original solution is 124 mg.
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
Answer:
Conversion of energy
Explanation:
Shaking the sand is a form of kinetic energy. The friction of the sand particles rubbing against each other converts the kinetic energy to heat energy. Some of the kinetic energy also converts into the energy of sound waves, which you can hear while you shake the sand.
