Answer:
3.62 g/cm³
Explanation:
density = mass ÷ volume
Therefore, do 12.69 divided by 3.5
Answer: 2 atoms
Explanation: 2 in Co2 means 2 atoms
Answer:
1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s
Explanation:
You can predict the order of orbital energies by constructing a diagram as shown below.
Follow the arrows to get the orbitals in order of increasing energy.
The order is
1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s
Answer:
151.87dm³
Explanation:
Given parameters:
Volume of hydrogen gas = 6.78mole
Unknown:
Volume of hydrogen gas formed at STP = ?
Solution:
To solve this problem;
1 mole of a gas at STP = 22.4dm³ So;
6.78 mole of gas = 6.78 x 22.4 = 151.87dm³