Bromide gives away 1 electron (valency of 1) and Ca wants to gain 2 electrons (valency of 2) therefore 2 Br ions are needed
Answer:
There are 0.5 moles
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number of particles.
To calculate the moles, we use the equation:
Thus there are 0.5 moles
Explanation:
I believe it’s 290000 millimeters
- any zeroes between 2 non-zeroes
- any zeroes after non-zeroes in a number without a decimal point are sig figs
These are NOT:
- any zeroes before non-zeroes
- any zeroes after non-zeroes in a number without a decimal point
