Answer:
1.88 g
Explanation:
n(moles) = mass/molar mass
mass = moles x molar mass of nickel
mass = 3.21x10^-2 x 58.69
mass = 1.883949 grams
mass = 1.88 g (2dp)
Hope this helps :)
Answer:
write the uses of all elements which are given in the periodic table
Answer
The volume of the container that the gas is in = 874.30 L
Explanation
Given:
Moles, n = 3.2 mol
Pressure, P = 0.095 atm
Temperature, T = 43 °C = (43 + 273.15 K) = 316.15 K
Molar gas constant, R = 0.0821 atm•L/mol•K
What to find:
The volume of the container that the gas occupied.
Step-by-step solution:
The volume of the container that the gas occupied can be calculated using the ideal gas equation.

Therefore, the volume of the container that the gas occupied is 874.30 L
If bubbles aren't a for sure way of knowing a chemical reaction I don't know what is. But being for real, it is a chemical change because the bubbles are releasing carbon dioxide meaning it turned into a product from a reaction with outside forces.
Se02 is the formula for selenium dioxide, hope this helped.