Answer:
Now eating can change food both physically and chemically. Once your spit touches the food chemicals in the saliva begin to change the food chemically.
Explanation:
So let's use some equations to represent the data [let R= cost of ring & B= cost of bracelet]
R= B + $ 36 .... (1)
B=
× R ... (2)
By using simultaneous equations to solve for B and R.
Substitute eq. (1) into eq. (2)
B =
× (B + $36)
B =
B +
⇒ B = $48
By substituting value of B into ea (1)
If R = B + $36
R = ($48) + $36
= $84
∴ <span> the total of the two items = R + B
= $84 + $48
</span> = $132
Answer:
64 g/mol
Explanation:
In one molecule of FeSO4, we notice that we have 4 atoms
Hence, we can say that the molar mass of Oxygen in 1 unit/molecule of FeSO4 is 4 times the molar mass of Oxygen
Molar mass of Oxygen atom (O) = 16 g / mol
Molar mass of Oxygen in FeSO4 = 16 * 4 g / mol
Molar mass of Oxygen in FeSO4 = 64 g / mol
Answer:
Hydrogen Gas is the free element
Chemical change. You can never get back the rusted layers of metal even though you can wipe off the rust. Chemical changes are irreversible.