Final answer:
To have 30 oxygen (O) atoms, we need to multiply the coefficient by 5 in the compound Be(NO3)2. The new chemical formula with 30 oxygen atoms is 5Be(NO3)2. The new chemical formula contains 10 beryllium (Be) atoms, 10 nitrogen (N) atoms, and 30 oxygen (O) atoms.
Step-by-step explanation:
To determine the coefficient that will result in 30 oxygen (O) atoms in the compound Be(NO3)2, we need to calculate how many oxygen atoms are in the compound. In Be(NO3)2, there are 6 oxygen atoms because there are 2 NO3 groups and each NO3 group contains 3 oxygen atoms.
Since 6 is less than 30, we need to multiply the entire compound by a coefficient that will yield 30 oxygen atoms.
To achieve this, we will multiply the coefficient of 5 to the entire compound. Therefore, the new chemical formula will be 5Be(NO3)2 which will have 30 oxygen atoms.
Regarding the count of atoms in the new chemical formula, we can determine it by multiplying the coefficient with the number of atoms in the compound.
For the new chemical formula 5Be(NO3)2, there are 10 beryllium (Be) atoms, 10 nitrogen (N) atoms, and 30 oxygen (O) atoms.