The volume occupied by a certain mass of methane gas (CH4) at STP is 420 L. What will be its mass in grams at STP?
a
500 g
b 400 g
C 300 g
d None of the above

300 g

Explanation: I guessed and got it right

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l