Answer:
ans.........❣️❣️❣️❣️❣️❣️❣️❣️❣️❣️❣️
1. A
2. D.
3. Either A or B (my best guess is B.)
Molar mass of C= 12g/mol
2C= 2*12g/mol= 24g/mol
Molar Mass of F=19g/mol
4F= 4*19g/mol= 76g/mol
Total molar mass of C2F4 = (24g/mol+76g/mol)= 100g/mol
Now you need to find the moles of Fluorine
Moles= Mass/molar mass
Moles of Fluorine = 5.71g/100g/mol=0.0571mol of Fluorine
To find the number of atoms you multiply moles by Avogadro's number(

)
So the number of Fluorine atoms= 0.0571* 6.022x10^23= 3.44x10^22 atoms or
atoms
Answer:
22 cubic inches
Explanation:
We are given;
- Mass of titanium = 3.6 pounds
We are required to determine the volume of titanium in cubic inches
- We need to know the density of titanium;
Density of titanium = 4.51 g/cm^3
1 pound = 453.592 g
therefore, 3.6 pound = (3.6 × 453.592 g per pound)
= 1632.93 g
Therefore;
Volume = Mass ÷ density
= 1632.93 g ÷ 4.51 g/cm^3
= 362.069 cm³
But, 1 in³ = 16.387 cm³
Therefore;
Volume = 362.069 cm³ ÷ 16.387 cm³ per in³
= 22.095 in³
= 22 in³
Thus the volume of titanium is 22 cubic inches
Answer:
I would go with the first option. It shows how people having been releasing more and more carbon dioxide into the atmosphere.
Explanation: