C. Model. It's a graphical model that displays one or more weather elements.
Answer:
22.13g
Explanation:
We'll begin by writing a balanced equation for the reaction. This is illustrated below:
2C2H2 + 5O2 —> 4CO2 + 2H2O
Next, we'll calculate the mass of C2H2 and O2 that reacted from the balanced equation. This is illustrated below:
Molar Mass of C2H2 = (12x2) + (2x1)
= 24 + 2 = 26g/mol
Mass of C2H2 that reacted from the balanced equation = 2 x 26 = 52g
Molar Mass of O2 = 16x2 = 32g/mol
Mass of O2 that reacted from the balanced equation = 5 x 32 = 160g
Now, we can obtain the mass of C2H2 that will react with 68.1g of O2 as follow:
From the balanced equation above,
52g of C2H2 reacted with 160g of O2.
Therefore, Xg of C2H2 will react with 68.1g of O2 i.e
Xg of C2H2 = (52x68.1)/160
Xg of C2H2 = 22.13g
Therefore, 22.13g of C2H2 is needed to react with 68.1g of O2
Answer: I THINK C
Explanation: It has a 25% chance of being right so I'd wait if I were you just sayin
The metals will lose electrons while the non metals will gain electrons in order to attain octet structure.
An ion can be cation (positively charged) or anion (negatively charged).
Cations attain octet structure (8) by losing electron(s) while anions become stable or attains octet structure (8) by gaining electron(s).
The remaining elements are completed as follows to attain octet structure;
<u>Element</u>--<u>valence electron</u>--<u>electrons to gain</u>--<u>electrons to lose</u>--<u>ion formed</u>
O ------------ 6 ---------------------- 2 ------------------------ none -------------- 
Ca -------- 2 ----------------------- none ---------------------- 2 ------------------ 
Br ----------- 7 --------------------- 1 ------------------------ none --------------- 
S ------------ 6 ----------------------- 2 ------------------------ none --------------- 
Cl ------------ 7 ----------------------- 1 ------------------------ none ----------------
K -------------- 1 ----------------------- none ----------------------- 1 ------------------ 
Mg ------------ 2 ---------------------- none ---------------------- 2 ---------------- 
Be ------------- 2 ---------------------- none ---------------------- 2 ---------------- 
Learn more here: brainly.com/question/21089350