There are 2.74266105043 molecules in 100 grams of HCL.
It will slowly rotten and turn brown
Answer:
Explanation:
The Lanthanides were first discovered in 1787 when a unusual black mineral was found in Ytterby, Sweden. This mineral, now known as Gadolinite, was later separated into the various Lanthanide elements. In 1794, Professor Gadolin obtained yttria, an impure form of yttrium oxide, from the mineral.
Answer:
0.971
Explanation:
The pressure (P) in atmospheres (atm) the balloon was filled to will be
P = P1 +P2 + P3
where P1 is the pressure in atm of Helium (0.5 atm)
P2 is the pressure in atm of Nitrogen (X atm)
P3 is the pressure in atm of Hydrogen (0.4 atm)
The value of P2 provided in the question is in mmHg
To convert we have
1 atm = 760 mmHg
X atm = 54 mmHg
X = 54 × 1/760
X = 0.071 atm
Hence, P2 = 0.071 atm
Thus, from the formula earlier
P = 0.5 + 0.071 + 0.4
P = 0.971 atm